import tc and tl from 9ferno

10 files changed, 9176 insertions, 0 deletions

diff --git a/sys/src/cmd/tl/asm.c b/sys/src/cmd/tl/asm.c
new file mode 100644
index 000000000..66a7f0c64
--- /dev/null
+++ b/sys/src/cmd/tl/asm.c
@@ -0,0 +1,1801 @@
+#include	"l.h"
+
+long	OFFSET;
+
+static Prog *PP;
+
+long
+entryvalue(void)
+{
+	char *a;
+	Sym *s;
+
+	a = INITENTRY;
+	if(*a >= '0' && *a <= '9')
+		return atolwhex(a);
+	s = lookup(a, 0);
+	if(s->type == 0)
+		return INITTEXT;
+	switch(s->type) {
+	case STEXT:
+	case SLEAF:
+		break;
+	case SDATA:
+		if(dlm)
+			return s->value+INITDAT;
+	default:
+		diag("entry not text: %s", s->name);
+	}
+	return s->value;
+}
+
+void
+asmb(void)
+{
+	Prog *p;
+	long t, etext;
+	Optab *o;
+
+	if(debug['v'])
+		Bprint(&bso, "%5.2f asm\n", cputime());
+	Bflush(&bso);
+	OFFSET = HEADR;
+	seek(cout, OFFSET, 0);
+	pc = INITTEXT;
+	for(p = firstp; p != P; p = p->link) {
+		setarch(p);
+		if(p->as == ATEXT) {
+			curtext = p;
+			autosize = p->to.offset + 4;
+		}
+		if(p->pc != pc) {
+			diag("phase error %lux sb %lux",
+				p->pc, pc);
+			if(!debug['a'])
+				prasm(curp);
+			pc = p->pc;
+		}
+		curp = p;
+		o = oplook(p);	/* could probably avoid this call */
+		if(thumb)
+			thumbasmout(p, o);
+		else
+			asmout(p, o);
+		pc += o->size;
+	}
+	while(pc-INITTEXT < textsize) {
+		cput(0);
+		pc++;
+	}
+
+	if(debug['a'])
+		Bprint(&bso, "\n");
+	Bflush(&bso);
+	cflush();
+
+	/* output strings in text segment */
+	etext = INITTEXT + textsize;
+	for(t = pc; t < etext; t += sizeof(buf)-100) {
+		if(etext-t > sizeof(buf)-100)
+			datblk(t, sizeof(buf)-100, 1);
+		else
+			datblk(t, etext-t, 1);
+	}
+
+	curtext = P;
+	switch(HEADTYPE) {
+	case 0:
+	case 1:
+	case 2:
+	case 5:
+		OFFSET = HEADR+textsize;
+		seek(cout, OFFSET, 0);
+		break;
+	case 3:
+		OFFSET = rnd(HEADR+textsize, 4096);
+		seek(cout, OFFSET, 0);
+		break;
+	}
+	if(dlm){
+		char buf[8];
+
+		write(cout, buf, INITDAT-textsize);
+		textsize = INITDAT;
+	}
+	for(t = 0; t < datsize; t += sizeof(buf)-100) {
+		if(datsize-t > sizeof(buf)-100)
+			datblk(t, sizeof(buf)-100, 0);
+		else
+			datblk(t, datsize-t, 0);
+	}
+	cflush();
+
+	symsize = 0;
+	lcsize = 0;
+	if(!debug['s']) {
+		if(debug['v'])
+			Bprint(&bso, "%5.2f sym\n", cputime());
+		Bflush(&bso);
+		switch(HEADTYPE) {
+		case 0:
+		case 1:
+		case 4:
+		case 5:
+			debug['s'] = 1;
+			break;
+		case 2:
+			OFFSET = HEADR+textsize+datsize;
+			seek(cout, OFFSET, 0);
+			break;
+		case 3:
+			OFFSET += rnd(datsize, 4096);
+			seek(cout, OFFSET, 0);
+			break;
+		}
+		if(!debug['s'])
+			asmsym();
+		if(debug['v'])
+			Bprint(&bso, "%5.2f pc\n", cputime());
+		Bflush(&bso);
+		if(!debug['s'])
+			asmlc();
+		if(!debug['s'])
+			asmthumbmap();
+		if(dlm)
+			asmdyn();
+		cflush();
+	}
+	else if(dlm){
+		seek(cout, HEADR+textsize+datsize, 0);
+		asmdyn();
+		cflush();
+	}
+
+	curtext = P;
+	if(debug['v'])
+		Bprint(&bso, "%5.2f header\n", cputime());
+	Bflush(&bso);
+	OFFSET = 0;
+	seek(cout, OFFSET, 0);
+	switch(HEADTYPE) {
+	case 0:	/* no header */
+		break;
+	case 1:	/* aif for risc os */
+		lputl(0xe1a00000);		/* NOP - decompress code */
+		lputl(0xe1a00000);		/* NOP - relocation code */
+		lputl(0xeb000000 + 12);		/* BL - zero init code */
+		lputl(0xeb000000 +
+			(entryvalue()
+			 - INITTEXT
+			 + HEADR
+			 - 12
+			 - 8) / 4);		/* BL - entry code */
+
+		lputl(0xef000011);		/* SWI - exit code */
+		lputl(textsize+HEADR);		/* text size */
+		lputl(datsize);			/* data size */
+		lputl(0);			/* sym size */
+
+		lputl(bsssize);			/* bss size */
+		lputl(0);			/* sym type */
+		lputl(INITTEXT-HEADR);		/* text addr */
+		lputl(0);			/* workspace - ignored */
+
+		lputl(32);			/* addr mode / data addr flag */
+		lputl(0);			/* data addr */
+		for(t=0; t<2; t++)
+			lputl(0);		/* reserved */
+
+		for(t=0; t<15; t++)
+			lputl(0xe1a00000);	/* NOP - zero init code */
+		lputl(0xe1a0f00e);		/* B (R14) - zero init return */
+		break;
+	case 2:	/* plan 9 */
+		if(dlm)
+			lput(0x80000000|0x647);	/* magic */
+		else
+			lput(0x647);			/* magic */
+		lput(textsize);			/* sizes */
+		lput(datsize);
+		lput(bsssize);
+		lput(symsize);			/* nsyms */
+		lput(entryvalue());		/* va of entry */
+		lput(0L);
+		lput(lcsize);
+		break;
+	case 3:	/* boot for NetBSD */
+		lput((143<<16)|0413);		/* magic */
+		lputl(rnd(HEADR+textsize, 4096));
+		lputl(rnd(datsize, 4096));
+		lputl(bsssize);
+		lputl(symsize);			/* nsyms */
+		lputl(entryvalue());		/* va of entry */
+		lputl(0L);
+		lputl(0L);
+		break;
+	case 4: /* boot for IXP1200 */
+		break;
+	case 5: /* boot for ipaq */
+		lputl(0xe3300000);		/* nop */
+		lputl(0xe3300000);		/* nop */
+		lputl(0xe3300000);		/* nop */
+		lputl(0xe3300000);		/* nop */
+		break;
+	}
+	cflush();
+	if(debug['c']){
+		print("textsize=%ld\n", textsize);
+		print("datsize=%ld\n", datsize);
+		print("bsssize=%ld\n", bsssize);
+		print("symsize=%ld\n", symsize);
+		print("lcsize=%ld\n", lcsize);
+		print("total=%ld\n", textsize+datsize+bsssize+symsize+lcsize);
+	}
+}
+
+void
+strnput(char *s, int n)
+{
+	for(; *s; s++){
+		cput(*s);
+		n--;
+	}
+	for(; n > 0; n--)
+		cput(0);
+}
+
+void
+cput(int c)
+{
+	cbp[0] = c;
+	cbp++;
+	cbc--;
+	if(cbc <= 0)
+		cflush();
+}
+
+/*
+void
+cput(long c)
+{
+	*cbp++ = c;
+	if(--cbc <= 0)
+		cflush();
+}
+*/
+
+void
+wput(long l)
+{
+
+	cbp[0] = l>>8;
+	cbp[1] = l;
+	cbp += 2;
+	cbc -= 2;
+	if(cbc <= 0)
+		cflush();
+}
+
+void
+hput(long l)
+{
+
+	cbp[0] = l>>8;
+	cbp[1] = l;
+	cbp += 2;
+	cbc -= 2;
+	if(cbc <= 0)
+		cflush();
+}
+
+void
+lput(long l)
+{
+
+	cbp[0] = l>>24;
+	cbp[1] = l>>16;
+	cbp[2] = l>>8;
+	cbp[3] = l;
+	cbp += 4;
+	cbc -= 4;
+	if(cbc <= 0)
+		cflush();
+}
+
+void
+lputl(long l)
+{
+
+	cbp[3] = l>>24;
+	cbp[2] = l>>16;
+	cbp[1] = l>>8;
+	cbp[0] = l;
+	cbp += 4;
+	cbc -= 4;
+	if(cbc <= 0)
+		cflush();
+}
+
+void
+cflush(void)
+{
+	int n;
+
+	/* no bug if cbc < 0 since obuf(cbuf) followed by ibuf in buf! */
+	n = sizeof(buf.cbuf) - cbc;
+	if(n)
+		write(cout, buf.cbuf, n);
+	cbp = buf.cbuf;
+	cbc = sizeof(buf.cbuf);
+}
+
+void
+nopstat(char *f, Count *c)
+{
+	if(c->outof)
+	Bprint(&bso, "%s delay %ld/%ld (%.2f)\n", f,
+		c->outof - c->count, c->outof,
+		(double)(c->outof - c->count)/c->outof);
+}
+
+void
+asmsym(void)
+{
+	Prog *p;
+	Auto *a;
+	Sym *s;
+	int h;
+
+	s = lookup("etext", 0);
+	if(s->type == STEXT)
+		putsymb(s->name, 'T', s->value, s->version);
+
+	for(h=0; h<NHASH; h++)
+		for(s=hash[h]; s!=S; s=s->link)
+			switch(s->type) {
+			case SCONST:
+				putsymb(s->name, 'D', s->value, s->version);
+				continue;
+
+			case SDATA:
+				putsymb(s->name, 'D', s->value+INITDAT, s->version);
+				continue;
+
+			case SBSS:
+				putsymb(s->name, 'B', s->value+INITDAT, s->version);
+				continue;
+
+			case SSTRING:
+				putsymb(s->name, 'T', s->value, s->version);
+				continue;
+
+			case SFILE:
+				putsymb(s->name, 'f', s->value, s->version);
+				continue;
+			}
+
+	for(p=textp; p!=P; p=p->cond) {
+		s = p->from.sym;
+		if(s->type != STEXT && s->type != SLEAF)
+			continue;
+
+		/* filenames first */
+		for(a=p->to.autom; a; a=a->link)
+			if(a->type == D_FILE)
+				putsymb(a->asym->name, 'z', a->aoffset, 0);
+			else
+			if(a->type == D_FILE1)
+				putsymb(a->asym->name, 'Z', a->aoffset, 0);
+
+		if(s->type == STEXT)
+			putsymb(s->name, 'T', s->value, s->version);
+		else
+			putsymb(s->name, 'L', s->value, s->version);
+
+		/* frame, auto and param after */
+		putsymb(".frame", 'm', p->to.offset+4, 0);
+		for(a=p->to.autom; a; a=a->link)
+			if(a->type == D_AUTO)
+				putsymb(a->asym->name, 'a', -a->aoffset, 0);
+			else
+			if(a->type == D_PARAM)
+				putsymb(a->asym->name, 'p', a->aoffset, 0);
+	}
+	if(debug['v'] || debug['n'])
+		Bprint(&bso, "symsize = %lud\n", symsize);
+	Bflush(&bso);
+}
+
+void
+putsymb(char *s, int t, long v, int ver)
+{
+	int i, f;
+
+	if(t == 'f')
+		s++;
+	lput(v);
+	if(ver)
+		t += 'a' - 'A';
+	cput(t+0x80);			/* 0x80 is variable length */
+
+	if(t == 'Z' || t == 'z') {
+		cput(s[0]);
+		for(i=1; s[i] != 0 || s[i+1] != 0; i += 2) {
+			cput(s[i]);
+			cput(s[i+1]);
+		}
+		cput(0);
+		cput(0);
+		i++;
+	}
+	else {
+		for(i=0; s[i]; i++)
+			cput(s[i]);
+		cput(0);
+	}
+	symsize += 4 + 1 + i + 1;
+
+	if(debug['n']) {
+		if(t == 'z' || t == 'Z') {
+			Bprint(&bso, "%c %.8lux ", t, v);
+			for(i=1; s[i] != 0 || s[i+1] != 0; i+=2) {
+				f = ((s[i]&0xff) << 8) | (s[i+1]&0xff);
+				Bprint(&bso, "/%x", f);
+			}
+			Bprint(&bso, "\n");
+			return;
+		}
+		if(ver)
+			Bprint(&bso, "%c %.8lux %s<%d>\n", t, v, s, ver);
+		else
+			Bprint(&bso, "%c %.8lux %s\n", t, v, s);
+	}
+}
+
+#define	MINLC	4
+void
+asmlc(void)
+{
+	long oldpc, oldlc;
+	Prog *p;
+	long v, s;
+
+	oldpc = INITTEXT;
+	oldlc = 0;
+	for(p = firstp; p != P; p = p->link) {
+		setarch(p);
+		if(p->line == oldlc || p->as == ATEXT || p->as == ANOP) {
+			if(p->as == ATEXT)
+				curtext = p;
+			if(debug['L'])
+				Bprint(&bso, "%6lux %P\n",
+					p->pc, p);
+			continue;
+		}
+		if(debug['L'])
+			Bprint(&bso, "\t\t%6ld", lcsize);
+		v = (p->pc - oldpc) / MINLC;
+		while(v) {
+			s = 127;
+			if(v < 127)
+				s = v;
+			cput(s+128);	/* 129-255 +pc */
+			if(debug['L'])
+				Bprint(&bso, " pc+%ld*%d(%ld)", s, MINLC, s+128);
+			v -= s;
+			lcsize++;
+		}
+		s = p->line - oldlc;
+		oldlc = p->line;
+		oldpc = p->pc + MINLC;
+		if(s > 64 || s < -64) {
+			cput(0);	/* 0 vv +lc */
+			cput(s>>24);
+			cput(s>>16);
+			cput(s>>8);
+			cput(s);
+			if(debug['L']) {
+				if(s > 0)
+					Bprint(&bso, " lc+%ld(%d,%ld)\n",
+						s, 0, s);
+				else
+					Bprint(&bso, " lc%ld(%d,%ld)\n",
+						s, 0, s);
+				Bprint(&bso, "%6lux %P\n",
+					p->pc, p);
+			}
+			lcsize += 5;
+			continue;
+		}
+		if(s > 0) {
+			cput(0+s);	/* 1-64 +lc */
+			if(debug['L']) {
+				Bprint(&bso, " lc+%ld(%ld)\n", s, 0+s);
+				Bprint(&bso, "%6lux %P\n",
+					p->pc, p);
+			}
+		} else {
+			cput(64-s);	/* 65-128 -lc */
+			if(debug['L']) {
+				Bprint(&bso, " lc%ld(%ld)\n", s, 64-s);
+				Bprint(&bso, "%6lux %P\n",
+					p->pc, p);
+			}
+		}
+		lcsize++;
+	}
+	while(lcsize & 1) {
+		s = 129;
+		cput(s);
+		lcsize++;
+	}
+	if(debug['v'] || debug['L'])
+		Bprint(&bso, "lcsize = %ld\n", lcsize);
+	Bflush(&bso);
+}
+
+static void
+outt(long f, long l)
+{
+	if(debug['L'])
+		Bprint(&bso, "tmap: %lux-%lux\n", f, l);
+	lput(f);
+	lput(l);
+}
+
+void
+asmthumbmap(void)
+{
+	long pc, lastt;
+	Prog *p;
+
+	if(!seenthumb)
+		return;
+	pc = 0;
+	lastt = -1;
+	for(p = firstp; p != P; p = p->link){
+		pc = p->pc - INITTEXT;
+		if(p->as == ATEXT){
+			setarch(p);
+			if(thumb){
+				if(p->from.sym->foreign){	// 8 bytes of ARM first
+					if(lastt >= 0){
+						outt(lastt, pc-1);
+						lastt = -1;
+					}
+					pc += 8;
+				}
+				if(lastt < 0)
+					lastt = pc;
+			}
+			else{
+				if(p->from.sym->foreign){	// 4 bytes of THUMB first
+					if(lastt < 0)
+						lastt = pc;
+					pc += 4;
+				}
+				if(lastt >= 0){
+					outt(lastt, pc-1);
+					lastt = -1;
+				}
+			}
+		}
+	}
+	if(lastt >= 0)
+		outt(lastt, pc+1);
+}
+
+void
+datblk(long s, long n, int str)
+{
+	Sym *v;
+	Prog *p;
+	char *cast;
+	long a, l, fl, j, d;
+	int i, c;
+
+	memset(buf.dbuf, 0, n+100);
+	for(p = datap; p != P; p = p->link) {
+		if(str != (p->from.sym->type == SSTRING))
+			continue;
+		curp = p;
+		a = p->from.sym->value + p->from.offset;
+		l = a - s;
+		c = p->reg;
+		i = 0;
+		if(l < 0) {
+			if(l+c <= 0)
+				continue;
+			while(l < 0) {
+				l++;
+				i++;
+			}
+		}
+		if(l >= n)
+			continue;
+		if(p->as != AINIT && p->as != ADYNT) {
+			for(j=l+(c-i)-1; j>=l; j--)
+				if(buf.dbuf[j]) {
+					print("%P\n", p);
+					diag("multiple initialization");
+					break;
+				}
+		}
+		switch(p->to.type) {
+		default:
+			diag("unknown mode in initialization%P", p);
+			break;
+
+		case D_FCONST:
+			switch(c) {
+			default:
+			case 4:
+				fl = ieeedtof(p->to.ieee);
+				cast = (char*)&fl;
+				for(; i<c; i++) {
+					buf.dbuf[l] = cast[fnuxi4[i]];
+					l++;
+				}
+				break;
+			case 8:
+				cast = (char*)p->to.ieee;
+				for(; i<c; i++) {
+					buf.dbuf[l] = cast[fnuxi8[i]];
+					l++;
+				}
+				break;
+			}
+			break;
+
+		case D_SCONST:
+			for(; i<c; i++) {
+				buf.dbuf[l] = p->to.sval[i];
+				l++;
+			}
+			break;
+
+		case D_CONST:
+			d = p->to.offset;
+			v = p->to.sym;
+			if(v) {
+				switch(v->type) {
+				case SUNDEF:
+					ckoff(v, d);
+					d += v->value;
+					break;
+				case STEXT:
+				case SLEAF:
+					d += v->value;
+#ifdef CALLEEBX
+					d += fnpinc(v);
+#else
+					if(v->thumb)
+						d++;		// T bit
+#endif
+					break;
+				case SSTRING:
+					d += v->value;
+					break;
+				case SDATA:
+				case SBSS:
+					d += v->value + INITDAT;
+					break;
+				}
+				if(dlm)
+					dynreloc(v, a+INITDAT, 1);
+			}
+			cast = (char*)&d;
+			switch(c) {
+			default:
+				diag("bad nuxi %d %d%P", c, i, curp);
+				break;
+			case 1:
+				for(; i<c; i++) {
+					buf.dbuf[l] = cast[inuxi1[i]];
+					l++;
+				}
+				break;
+			case 2:
+				for(; i<c; i++) {
+					buf.dbuf[l] = cast[inuxi2[i]];
+					l++;
+				}
+				break;
+			case 4:
+				for(; i<c; i++) {
+					buf.dbuf[l] = cast[inuxi4[i]];
+					l++;
+				}
+				break;
+			}
+			break;
+		}
+	}
+	write(cout, buf.dbuf, n);
+}
+
+void
+asmout(Prog *p, Optab *o)
+{
+	long o1, o2, o3, o4, o5, o6, v;
+	int r, rf, rt, rt2;
+	Sym *s;
+
+PP = p;
+	o1 = 0;
+	o2 = 0;
+	o3 = 0;
+	o4 = 0;
+	o5 = 0;
+	o6 = 0;
+	armsize += o->size;
+if(debug['P']) print("%ulx: %P	type %d\n", (ulong)(p->pc), p, o->type);
+	switch(o->type) {
+	default:
+		diag("unknown asm %d", o->type);
+		prasm(p);
+		break;
+
+	case 0:		/* pseudo ops */
+if(debug['G']) print("%ulx: %s: arm %d %d %d %d\n", (ulong)(p->pc), p->from.sym->name, p->from.sym->thumb, p->from.sym->foreign, p->from.sym->fnptr, p->from.sym->used);
+		break;
+
+	case 1:		/* op R,[R],R */
+		o1 = oprrr(p->as, p->scond);
+		rf = p->from.reg;
+		rt = p->to.reg;
+		r = p->reg;
+		if(p->to.type == D_NONE)
+			rt = 0;
+		if(p->as == AMOVW || p->as == AMVN)
+			r = 0;
+		else if(r == NREG)
+			r = rt;
+		o1 |= rf | (r<<16) | (rt<<12);
+		break;
+
+	case 2:		/* movbu $I,[R],R */
+		aclass(&p->from);
+		o1 = oprrr(p->as, p->scond);
+		o1 |= immrot(instoffset);
+		rt = p->to.reg;
+		r = p->reg;
+		if(p->to.type == D_NONE)
+			rt = 0;
+		if(p->as == AMOVW || p->as == AMVN)
+			r = 0;
+		else if(r == NREG)
+			r = rt;
+		o1 |= (r<<16) | (rt<<12);
+		break;
+
+	case 3:		/* add R<<[IR],[R],R */
+	mov:
+		aclass(&p->from);
+		o1 = oprrr(p->as, p->scond);
+		o1 |= p->from.offset;
+		rt = p->to.reg;
+		r = p->reg;
+		if(p->to.type == D_NONE)
+			rt = 0;
+		if(p->as == AMOVW || p->as == AMVN)
+			r = 0;
+		else if(r == NREG)
+			r = rt;
+		o1 |= (r<<16) | (rt<<12);
+		break;
+
+	case 4:		/* add $I,[R],R */
+		aclass(&p->from);
+		o1 = oprrr(AADD, p->scond);
+		o1 |= immrot(instoffset);
+		r = p->from.reg;
+		if(r == NREG)
+			r = o->param;
+		o1 |= r << 16;
+		o1 |= p->to.reg << 12;
+		break;
+
+	case 5:		/* bra s */
+		v = -8;
+		if(p->cond == UP) {
+			s = p->to.sym;
+			if(s->type != SUNDEF)
+				diag("bad branch sym type");
+			v = (ulong)s->value >> (Roffset-2);
+			dynreloc(s, p->pc, 0);
+		}
+		else if(p->cond != P)
+			v = (p->cond->pc - pc) - 8;
+#ifdef CALLEEBX
+		if(p->as == ABL)
+			v += fninc(p->to.sym);
+#endif
+		o1 = opbra(p->as, p->scond);
+		o1 |= (v >> 2) & 0xffffff;
+		break;
+
+	case 6:		/* b ,O(R) -> add $O,R,PC */
+		aclass(&p->to);
+		o1 = oprrr(AADD, p->scond);
+		o1 |= immrot(instoffset);
+		o1 |= p->to.reg << 16;
+		o1 |= REGPC << 12;
+		break;
+
+	case 7:		/* bl ,O(R) -> mov PC,link; add $O,R,PC */
+		aclass(&p->to);
+		o1 = oprrr(AADD, p->scond);
+		o1 |= immrot(0);
+		o1 |= REGPC << 16;
+		o1 |= REGLINK << 12;
+
+		o2 = oprrr(AADD, p->scond);
+		o2 |= immrot(instoffset);
+		o2 |= p->to.reg << 16;
+		o2 |= REGPC << 12;
+		break;
+
+	case 8:		/* sll $c,[R],R -> mov (R<<$c),R */
+		aclass(&p->from);
+		o1 = oprrr(p->as, p->scond);
+		r = p->reg;
+		if(r == NREG)
+			r = p->to.reg;
+		o1 |= r;
+		o1 |= (instoffset&31) << 7;
+		o1 |= p->to.reg << 12;
+		break;
+
+	case 9:		/* sll R,[R],R -> mov (R<<R),R */
+		o1 = oprrr(p->as, p->scond);
+		r = p->reg;
+		if(r == NREG)
+			r = p->to.reg;
+		o1 |= r;
+		o1 |= (p->from.reg << 8) | (1<<4);
+		o1 |= p->to.reg << 12;
+		break;
+
+	case 10:	/* swi [$con] */
+		o1 = oprrr(p->as, p->scond);
+		if(p->to.type != D_NONE) {
+			aclass(&p->to);
+			o1 |= instoffset & 0xffffff;
+		}
+		break;
+
+	case 11:	/* word */
+		switch(aclass(&p->to)) {
+		case C_LCON:
+			if(!dlm)
+				break;
+			if(p->to.name != D_EXTERN && p->to.name != D_STATIC)
+				break;
+		case C_ADDR:
+			if(p->to.sym->type == SUNDEF)
+				ckoff(p->to.sym, p->to.offset);
+			dynreloc(p->to.sym, p->pc, 1);
+		}
+		o1 = instoffset;
+		break;
+
+	case 12:	/* movw $lcon, reg */
+		o1 = omvl(p, &p->from, p->to.reg);
+		break;
+
+	case 13:	/* op $lcon, [R], R */
+		o1 = omvl(p, &p->from, REGTMP);
+		if(!o1)
+			break;
+		o2 = oprrr(p->as, p->scond);
+		o2 |= REGTMP;
+		r = p->reg;
+		if(p->as == AMOVW || p->as == AMVN)
+			r = 0;
+		else if(r == NREG)
+			r = p->to.reg;
+		o2 |= r << 16;
+		if(p->to.type != D_NONE)
+			o2 |= p->to.reg << 12;
+		break;
+
+	case 14:	/* movb/movbu/movh/movhu R,R */
+		o1 = oprrr(ASLL, p->scond);
+
+		if(p->as == AMOVBU || p->as == AMOVHU)
+			o2 = oprrr(ASRL, p->scond);
+		else
+			o2 = oprrr(ASRA, p->scond);
+
+		r = p->to.reg;
+		o1 |= (p->from.reg)|(r<<12);
+		o2 |= (r)|(r<<12);
+		if(p->as == AMOVB || p->as == AMOVBU) {
+			o1 |= (24<<7);
+			o2 |= (24<<7);
+		} else {
+			o1 |= (16<<7);
+			o2 |= (16<<7);
+		}
+		break;
+
+	case 15:	/* mul r,[r,]r */
+		o1 = oprrr(p->as, p->scond);
+		rf = p->from.reg;
+		rt = p->to.reg;
+		r = p->reg;
+		if(r == NREG)
+			r = rt;
+		if(rt == r) {
+			r = rf;
+			rf = rt;
+		}
+		if(0)
+		if(rt == r || rf == REGPC || r == REGPC || rt == REGPC) {
+			diag("bad registers in MUL");
+			prasm(p);
+		}
+		o1 |= (rf<<8) | r | (rt<<16);
+		break;
+
+
+	case 16:	/* div r,[r,]r */
+		o1 = 0xf << 28;
+		o2 = 0;
+		break;
+
+	case 17:
+		o1 = oprrr(p->as, p->scond);
+		rf = p->from.reg;
+		rt = p->to.reg;
+		rt2 = p->to.offset;
+		r = p->reg;
+		o1 |= (rf<<8) | r | (rt<<16) | (rt2<<12);
+		break;
+
+	case 20:	/* mov/movb/movbu R,O(R) */
+		aclass(&p->to);
+		r = p->to.reg;
+		if(r == NREG)
+			r = o->param;
+		o1 = osr(p->as, p->from.reg, instoffset, r, p->scond);
+		break;
+
+	case 21:	/* mov/movbu O(R),R -> lr */
+		aclass(&p->from);
+		r = p->from.reg;
+		if(r == NREG)
+			r = o->param;
+		o1 = olr(instoffset, r, p->to.reg, p->scond);
+		if(p->as != AMOVW)
+			o1 |= 1<<22;
+		break;
+
+	case 22:	/* movb/movh/movhu O(R),R -> lr,shl,shr */
+		aclass(&p->from);
+		r = p->from.reg;
+		if(r == NREG)
+			r = o->param;
+		o1 = olr(instoffset, r, p->to.reg, p->scond);
+
+		o2 = oprrr(ASLL, p->scond);
+		o3 = oprrr(ASRA, p->scond);
+		r = p->to.reg;
+		if(p->as == AMOVB) {
+			o2 |= (24<<7)|(r)|(r<<12);
+			o3 |= (24<<7)|(r)|(r<<12);
+		} else {
+			o2 |= (16<<7)|(r)|(r<<12);
+			if(p->as == AMOVHU)
+				o3 = oprrr(ASRL, p->scond);
+			o3 |= (16<<7)|(r)|(r<<12);
+		}
+		break;
+
+	case 23:	/* movh/movhu R,O(R) -> sb,sb */
+		aclass(&p->to);
+		r = p->to.reg;
+		if(r == NREG)
+			r = o->param;
+		o1 = osr(AMOVH, p->from.reg, instoffset, r, p->scond);
+
+		o2 = oprrr(ASRL, p->scond);
+		o2 |= (8<<7)|(p->from.reg)|(REGTMP<<12);
+
+		o3 = osr(AMOVH, REGTMP, instoffset+1, r, p->scond);
+		break;
+
+	case 30:	/* mov/movb/movbu R,L(R) */
+		o1 = omvl(p, &p->to, REGTMP);
+		if(!o1)
+			break;
+		r = p->to.reg;
+		if(r == NREG)
+			r = o->param;
+		o2 = osrr(p->from.reg, REGTMP,r, p->scond);
+		if(p->as != AMOVW)
+			o2 |= 1<<22;
+		break;
+
+	case 31:	/* mov/movbu L(R),R -> lr[b] */
+	case 32:	/* movh/movb L(R),R -> lr[b] */
+		o1 = omvl(p, &p->from, REGTMP);
+		if(!o1)
+			break;
+		r = p->from.reg;
+		if(r == NREG)
+			r = o->param;
+		o2 = olrr(REGTMP,r, p->to.reg, p->scond);
+		if(p->as == AMOVBU || p->as == AMOVB)
+			o2 |= 1<<22;
+		if(o->type == 31)
+			break;
+
+		o3 = oprrr(ASLL, p->scond);
+
+		if(p->as == AMOVBU || p->as == AMOVHU)
+			o4 = oprrr(ASRL, p->scond);
+		else
+			o4 = oprrr(ASRA, p->scond);
+
+		r = p->to.reg;
+		o3 |= (r)|(r<<12);
+		o4 |= (r)|(r<<12);
+		if(p->as == AMOVB || p->as == AMOVBU) {
+			o3 |= (24<<7);
+			o4 |= (24<<7);
+		} else {
+			o3 |= (16<<7);
+			o4 |= (16<<7);
+		}
+		break;
+
+	case 33:	/* movh/movhu R,L(R) -> sb, sb */
+		o1 = omvl(p, &p->to, REGTMP);
+		if(!o1)
+			break;
+		r = p->to.reg;
+		if(r == NREG)
+			r = o->param;
+		o2 = osrr(p->from.reg, REGTMP, r, p->scond);
+		o2 |= (1<<22) ;
+
+		o3 = oprrr(ASRL, p->scond);
+		o3 |= (8<<7)|(p->from.reg)|(p->from.reg<<12);
+		o3 |= (1<<6);	/* ROR 8 */
+
+		o4 = oprrr(AADD, p->scond);
+		o4 |= (REGTMP << 12) | (REGTMP << 16);
+		o4 |= immrot(1);
+
+		o5 = osrr(p->from.reg, REGTMP,r,p->scond);
+		o5 |= (1<<22);
+
+		o6 = oprrr(ASRL, p->scond);
+		o6 |= (24<<7)|(p->from.reg)|(p->from.reg<<12);
+		o6 |= (1<<6);	/* ROL 8 */
+
+		break;
+		
+	case 34:	/* mov $lacon,R */
+		o1 = omvl(p, &p->from, REGTMP);
+		if(!o1)
+			break;
+
+		o2 = oprrr(AADD, p->scond);
+		o2 |= REGTMP;
+		r = p->from.reg;
+		if(r == NREG)
+			r = o->param;
+		o2 |= r << 16;
+		if(p->to.type != D_NONE)
+			o2 |= p->to.reg << 12;
+		break;
+
+	case 35:	/* mov PSR,R */
+		o1 = (2<<23) | (0xf<<16) | (0<<0);
+		o1 |= (p->scond & C_SCOND) << 28;
+		o1 |= (p->from.reg & 1) << 22;
+		o1 |= p->to.reg << 12;
+		break;
+
+	case 36:	/* mov R,PSR */
+		o1 = (2<<23) | (0x29f<<12) | (0<<4);
+		if(p->scond & C_FBIT)
+			o1 ^= 0x010 << 12;
+		o1 |= (p->scond & C_SCOND) << 28;
+		o1 |= (p->to.reg & 1) << 22;
+		o1 |= p->from.reg << 0;
+		break;
+
+	case 37:	/* mov $con,PSR */
+		aclass(&p->from);
+		o1 = (2<<23) | (0x29f<<12) | (0<<4);
+		if(p->scond & C_FBIT)
+			o1 ^= 0x010 << 12;
+		o1 |= (p->scond & C_SCOND) << 28;
+		o1 |= immrot(instoffset);
+		o1 |= (p->to.reg & 1) << 22;
+		o1 |= p->from.reg << 0;
+		break;
+
+	case 38:	/* movm $con,oreg -> stm */
+		o1 = (0x4 << 25);
+		o1 |= p->from.offset & 0xffff;
+		o1 |= p->to.reg << 16;
+		aclass(&p->to);
+		goto movm;
+
+	case 39:	/* movm oreg,$con -> ldm */
+		o1 = (0x4 << 25) | (1 << 20);
+		o1 |= p->to.offset & 0xffff;
+		o1 |= p->from.reg << 16;
+		aclass(&p->from);
+	movm:
+		if(instoffset != 0)
+			diag("offset must be zero in MOVM");
+		o1 |= (p->scond & C_SCOND) << 28;
+		if(p->scond & C_PBIT)
+			o1 |= 1 << 24;
+		if(p->scond & C_UBIT)
+			o1 |= 1 << 23;
+		if(p->scond & C_SBIT)
+			o1 |= 1 << 22;
+		if(p->scond & C_WBIT)
+			o1 |= 1 << 21;
+		break;
+
+	case 40:	/* swp oreg,reg,reg */
+		aclass(&p->from);
+		if(instoffset != 0)
+			diag("offset must be zero in SWP");
+		o1 = (0x2<<23) | (0x9<<4);
+		if(p->as != ASWPW)
+			o1 |= 1 << 22;
+		o1 |= p->from.reg << 16;
+		o1 |= p->reg << 0;
+		o1 |= p->to.reg << 12;
+		o1 |= (p->scond & C_SCOND) << 28;
+		break;
+
+	case 41:	/* rfe -> movm.s.w.u 0(r13),[r15] */
+		o1 = 0xe8fd8000;
+		break;
+
+	case 50:	/* floating point store */
+		v = regoff(&p->to);
+		r = p->to.reg;
+		if(r == NREG)
+			r = o->param;
+		o1 = ofsr(p->as, p->from.reg, v, r, p->scond, p);
+		break;
+
+	case 51:	/* floating point load */
+		v = regoff(&p->from);
+		r = p->from.reg;
+		if(r == NREG)
+			r = o->param;
+		o1 = ofsr(p->as, p->to.reg, v, r, p->scond, p) | (1<<20);
+		break;
+
+	case 52:	/* floating point store, long offset UGLY */
+		o1 = omvl(p, &p->to, REGTMP);
+		if(!o1)
+			break;
+		r = p->to.reg;
+		if(r == NREG)
+			r = o->param;
+		o2 = oprrr(AADD, p->scond) | (REGTMP << 12) | (REGTMP << 16) | r;
+		o3 = ofsr(p->as, p->from.reg, 0, REGTMP, p->scond, p);
+		break;
+
+	case 53:	/* floating point load, long offset UGLY */
+		o1 = omvl(p, &p->from, REGTMP);
+		if(!o1)
+			break;
+		r = p->from.reg;
+		if(r == NREG)
+			r = o->param;
+		o2 = oprrr(AADD, p->scond) | (REGTMP << 12) | (REGTMP << 16) | r;
+		o3 = ofsr(p->as, p->to.reg, 0, REGTMP, p->scond, p) | (1<<20);
+		break;
+
+	case 54:	/* floating point arith */
+		o1 = oprrr(p->as, p->scond);
+		if(p->from.type == D_FCONST) {
+			rf = chipfloat(p->from.ieee);
+			if(rf < 0){
+				diag("invalid floating-point immediate\n%P", p);
+				rf = 0;
+			}
+			rf |= (1<<3);
+		} else
+			rf = p->from.reg;
+		rt = p->to.reg;
+		r = p->reg;
+		if(p->to.type == D_NONE)
+			rt = 0;	/* CMP[FD] */
+		else if(o1 & (1<<15))
+			r = 0;	/* monadic */
+		else if(r == NREG)
+			r = rt;
+		o1 |= rf | (r<<16) | (rt<<12);
+		break;
+
+	case 55:	/* floating point fix and float */
+		o1 = oprrr(p->as, p->scond);
+		rf = p->from.reg;
+		rt = p->to.reg;
+		if(p->to.type == D_NONE){
+			rt = 0;
+			diag("to.type==D_NONE (asm/fp)");
+		}
+		if(p->from.type == D_REG)
+			o1 |= (rf<<12) | (rt<<16);
+		else
+			o1 |= rf | (rt<<12);
+		break;
+
+	case 56:	/* move to FP[CS]R */
+		o1 = ((p->scond & C_SCOND) << 28) | (0xe << 24) | (1<<8) | (1<<4);
+		o1 |= ((p->to.reg+1)<<21) | (p->from.reg << 12);
+		break;
+
+	case 57:	/* move from FP[CS]R */
+		o1 = ((p->scond & C_SCOND) << 28) | (0xe << 24) | (1<<8) | (1<<4);
+		o1 |= ((p->from.reg+1)<<21) | (p->to.reg<<12) | (1<<20);
+		break;
+	case 58:	/* movbu R,R */
+		o1 = oprrr(AAND, p->scond);
+		o1 |= immrot(0xff);
+		rt = p->to.reg;
+		r = p->from.reg;
+		if(p->to.type == D_NONE)
+			rt = 0;
+		if(r == NREG)
+			r = rt;
+		o1 |= (r<<16) | (rt<<12);
+		break;
+
+	case 59:	/* movw/bu R<<I(R),R -> ldr indexed */
+		if(p->from.reg == NREG) {
+			if(p->as != AMOVW)
+				diag("byte MOV from shifter operand");
+			goto mov;
+		}
+		if(p->from.offset&(1<<4))
+			diag("bad shift in LDR");
+		o1 = olrr(p->from.offset, p->from.reg, p->to.reg, p->scond);
+		if(p->as == AMOVBU)
+			o1 |= 1<<22;
+		break;
+
+	case 60:	/* movb R(R),R -> ldrsb indexed */
+		if(p->from.reg == NREG) {
+			diag("byte MOV from shifter operand");
+			goto mov;
+		}
+		if(p->from.offset&(~0xf))
+			diag("bad shift in LDRSB");
+		o1 = olhrr(p->from.offset, p->from.reg, p->to.reg, p->scond);
+		o1 ^= (1<<5)|(1<<6);
+		break;
+
+	case 61:	/* movw/b/bu R,R<<[IR](R) -> str indexed */
+		if(p->to.reg == NREG)
+			diag("MOV to shifter operand");
+		o1 = osrr(p->from.reg, p->to.offset, p->to.reg, p->scond);
+		if(p->as == AMOVB || p->as == AMOVBU)
+			o1 |= 1<<22;
+		break;
+
+	case 62:	/* case R -> movw	R<<2(PC),PC */
+		o1 = olrr(p->from.reg, REGPC, REGPC, p->scond);
+		o1 |= 2<<7;
+		break;
+
+	case 63:	/* bcase */
+		if(p->cond != P) {
+			o1 = p->cond->pc;
+			if(dlm)
+				dynreloc(S, p->pc, 1);
+		}
+		break;
+
+	/* reloc ops */
+	case 64:	/* mov/movb/movbu R,addr */
+		o1 = omvl(p, &p->to, REGTMP);
+		if(!o1)
+			break;
+		o2 = osr(p->as, p->from.reg, 0, REGTMP, p->scond);
+		break;
+
+	case 65:	/* mov/movbu addr,R */
+	case 66:	/* movh/movhu/movb addr,R */
+		o1 = omvl(p, &p->from, REGTMP);
+		if(!o1)
+			break;
+		o2 = olr(0, REGTMP, p->to.reg, p->scond);
+		if(p->as == AMOVBU || p->as == AMOVB)
+			o2 |= 1<<22;
+		if(o->type == 65)
+			break;
+
+		o3 = oprrr(ASLL, p->scond);
+
+		if(p->as == AMOVBU || p->as == AMOVHU)
+			o4 = oprrr(ASRL, p->scond);
+		else
+			o4 = oprrr(ASRA, p->scond);
+
+		r = p->to.reg;
+		o3 |= (r)|(r<<12);
+		o4 |= (r)|(r<<12);
+		if(p->as == AMOVB || p->as == AMOVBU) {
+			o3 |= (24<<7);
+			o4 |= (24<<7);
+		} else {
+			o3 |= (16<<7);
+			o4 |= (16<<7);
+		}
+		break;
+
+	case 67:	/* movh/movhu R,addr -> sb, sb */
+		o1 = omvl(p, &p->to, REGTMP);
+		if(!o1)
+			break;
+		o2 = osr(p->as, p->from.reg, 0, REGTMP, p->scond);
+
+		o3 = oprrr(ASRL, p->scond);
+		o3 |= (8<<7)|(p->from.reg)|(p->from.reg<<12);
+		o3 |= (1<<6);	/* ROR 8 */
+
+		o4 = oprrr(AADD, p->scond);
+		o4 |= (REGTMP << 12) | (REGTMP << 16);
+		o4 |= immrot(1);
+
+		o5 = osr(p->as, p->from.reg, 0, REGTMP, p->scond);
+
+		o6 = oprrr(ASRL, p->scond);
+		o6 |= (24<<7)|(p->from.reg)|(p->from.reg<<12);
+		o6 |= (1<<6);	/* ROL 8 */
+		break;
+
+	case 68:	/* floating point store -> ADDR */
+		o1 = omvl(p, &p->to, REGTMP);
+		if(!o1)
+			break;
+		o2 = ofsr(p->as, p->from.reg, 0, REGTMP, p->scond, p);
+		break;
+
+	case 69:	/* floating point load <- ADDR */
+		o1 = omvl(p, &p->from, REGTMP);
+		if(!o1)
+			break;
+		o2 = ofsr(p->as, p->to.reg, 0, REGTMP, p->scond, p) | (1<<20);
+		break;
+
+	/* ArmV4 ops: */
+	case 70:	/* movh/movhu R,O(R) -> strh */
+		aclass(&p->to);
+		r = p->to.reg;
+		if(r == NREG)
+			r = o->param;
+		o1 = oshr(p->from.reg, instoffset, r, p->scond);
+		break;	
+	case 71:	/* movb/movh/movhu O(R),R -> ldrsb/ldrsh/ldrh */
+		aclass(&p->from);
+		r = p->from.reg;
+		if(r == NREG)
+			r = o->param;
+		o1 = olhr(instoffset, r, p->to.reg, p->scond);
+		if(p->as == AMOVB)
+			o1 ^= (1<<5)|(1<<6);
+		else if(p->as == AMOVH)
+			o1 ^= (1<<6);
+		break;
+	case 72:	/* movh/movhu R,L(R) -> strh */
+		o1 = omvl(p, &p->to, REGTMP);
+		if(!o1)
+			break;
+		r = p->to.reg;
+		if(r == NREG)
+			r = o->param;
+		o2 = oshrr(p->from.reg, REGTMP,r, p->scond);
+		break;	
+	case 73:	/* movb/movh/movhu L(R),R -> ldrsb/ldrsh/ldrh */
+		o1 = omvl(p, &p->from, REGTMP);
+		if(!o1)
+			break;
+		r = p->from.reg;
+		if(r == NREG)
+			r = o->param;
+		o2 = olhrr(REGTMP, r, p->to.reg, p->scond);
+		if(p->as == AMOVB)
+			o2 ^= (1<<5)|(1<<6);
+		else if(p->as == AMOVH)
+			o2 ^= (1<<6);
+		break;
+	case 74:	/* bx $I */
+#ifdef CALLEEBX
+		diag("bx $i case (arm)");
+#endif
+		if(!seenthumb)
+			diag("ABX $I and seenthumb==0");
+		v = p->cond->pc;
+		if(p->to.sym->thumb)
+			v |= 1;	// T bit
+		o1 = olr(8, REGPC, REGTMP, p->scond&C_SCOND);	// mov 8(PC), Rtmp
+		o2 = 	oprrr(AADD, p->scond) | immrot(8) | (REGPC<<16) | (REGLINK<<12);	// add 8,PC, LR
+		o3 = ((p->scond&C_SCOND)<<28) | (0x12fff<<8) | (1<<4) | REGTMP;		// bx Rtmp
+		o4 = opbra(AB, 14);	// B over o6
+		o5 = v;
+		break;
+	case 75:	/* bx O(R) */
+		aclass(&p->to);
+		if(instoffset != 0)
+			diag("non-zero offset in ABX");
+/*
+		o1 = 	oprrr(AADD, p->scond) | immrot(0) | (REGPC<<16) | (REGLINK<<12);	// mov PC, LR
+		o2 = ((p->scond&C_SCOND)<<28) | (0x12fff<<8) | (1<<4) | p->to.reg;		// BX R
+*/
+		// p->to.reg may be REGLINK
+		o1 = oprrr(AADD, p->scond);
+		o1 |= immrot(instoffset);
+		o1 |= p->to.reg << 16;
+		o1 |= REGTMP << 12;
+		o2 = 	oprrr(AADD, p->scond) | immrot(0) | (REGPC<<16) | (REGLINK<<12);	// mov PC, LR
+		o3 = ((p->scond&C_SCOND)<<28) | (0x12fff<<8) | (1<<4) | REGTMP;		// BX Rtmp
+		break;
+	case 76:	/* bx O(R) when returning from fn*/
+		if(!seenthumb)
+			diag("ABXRET and seenthumb==0");
+		aclass(&p->to);
+// print("ARM BXRET %d(R%d)\n", instoffset, p->to.reg);
+		if(instoffset != 0)
+			diag("non-zero offset in ABXRET");
+		// o1 = olr(instoffset, p->to.reg, REGTMP, p->scond);	// mov O(R), Rtmp
+		o1 = ((p->scond&C_SCOND)<<28) | (0x12fff<<8) | (1<<4) | p->to.reg;		// BX R
+		break;
+	}
+
+	v = p->pc;
+	switch(o->size) {
+	default:
+		if(debug['a'])
+			Bprint(&bso, " %.8lux:\t\t%P\n", v, p);
+		break;
+	case 4:
+		if(debug['a'])
+			Bprint(&bso, " %.8lux: %.8lux\t%P\n", v, o1, p);
+		lputl(o1);
+		break;
+	case 8:
+		if(debug['a'])
+			Bprint(&bso, " %.8lux: %.8lux %.8lux%P\n", v, o1, o2, p);
+		lputl(o1);
+		lputl(o2);
+		break;
+	case 12:
+		if(debug['a'])
+			Bprint(&bso, " %.8lux: %.8lux %.8lux %.8lux%P\n", v, o1, o2, o3, p);
+		lputl(o1);
+		lputl(o2);
+		lputl(o3);
+		break;
+	case 16:
+		if(debug['a'])
+			Bprint(&bso, " %.8lux: %.8lux %.8lux %.8lux %.8lux%P\n",
+				v, o1, o2, o3, o4, p);
+		lputl(o1);
+		lputl(o2);
+		lputl(o3);
+		lputl(o4);
+		break;
+	case 20:
+		if(debug['a'])
+			Bprint(&bso, " %.8lux: %.8lux %.8lux %.8lux %.8lux %.8lux%P\n",
+				v, o1, o2, o3, o4, o5, p);
+		lputl(o1);
+		lputl(o2);
+		lputl(o3);
+		lputl(o4);
+		lputl(o5);
+		break;
+	case 24:
+		if(debug['a'])
+			Bprint(&bso, " %.8lux: %.8lux %.8lux %.8lux %.8lux %.8lux %.8lux%P\n",
+				v, o1, o2, o3, o4, o5, o6, p);
+		lputl(o1);
+		lputl(o2);
+		lputl(o3);
+		lputl(o4);
+		lputl(o5);
+		lputl(o6);
+		break;
+	}
+}
+
+long
+oprrr(int a, int sc)
+{
+	long o;
+
+	o = (sc & C_SCOND) << 28;
+	if(sc & C_SBIT)
+		o |= 1 << 20;
+	if(sc & (C_PBIT|C_WBIT))
+		diag(".P/.W on dp instruction");
+	switch(a) {
+	case AMULU:
+	case AMUL:	return o | (0x0<<21) | (0x9<<4);
+	case AMULA:	return o | (0x1<<21) | (0x9<<4);
+	case AMULLU:	return o | (0x4<<21) | (0x9<<4);
+	case AMULL:	return o | (0x6<<21) | (0x9<<4);
+	case AMULALU:	return o | (0x5<<21) | (0x9<<4);
+	case AMULAL:	return o | (0x7<<21) | (0x9<<4);
+	case AAND:	return o | (0x0<<21);
+	case AEOR:	return o | (0x1<<21);
+	case ASUB:	return o | (0x2<<21);
+	case ARSB:	return o | (0x3<<21);
+	case AADD:	return o | (0x4<<21);
+	case AADC:	return o | (0x5<<21);
+	case ASBC:	return o | (0x6<<21);
+	case ARSC:	return o | (0x7<<21);
+	case ATST:	return o | (0x8<<21) | (1<<20);
+	case ATEQ:	return o | (0x9<<21) | (1<<20);
+	case ACMP:	return o | (0xa<<21) | (1<<20);
+	case ACMN:	return o | (0xb<<21) | (1<<20);
+	case AORR:	return o | (0xc<<21);
+	case AMOVW:	return o | (0xd<<21);
+	case ABIC:	return o | (0xe<<21);
+	case AMVN:	return o | (0xf<<21);
+	case ASLL:	return o | (0xd<<21) | (0<<5);
+	case ASRL:	return o | (0xd<<21) | (1<<5);
+	case ASRA:	return o | (0xd<<21) | (2<<5);
+	case ASWI:	return o | (0xf<<24);
+
+	case AADDD:	return o | (0xe<<24) | (0x0<<20) | (1<<8) | (1<<7);
+	case AADDF:	return o | (0xe<<24) | (0x0<<20) | (1<<8);
+	case AMULD:	return o | (0xe<<24) | (0x1<<20) | (1<<8) | (1<<7);
+	case AMULF:	return o | (0xe<<24) | (0x1<<20) | (1<<8);
+	case ASUBD:	return o | (0xe<<24) | (0x2<<20) | (1<<8) | (1<<7);
+	case ASUBF:	return o | (0xe<<24) | (0x2<<20) | (1<<8);
+	case ADIVD:	return o | (0xe<<24) | (0x4<<20) | (1<<8) | (1<<7);
+	case ADIVF:	return o | (0xe<<24) | (0x4<<20) | (1<<8);
+	case ACMPD:
+	case ACMPF:	return o | (0xe<<24) | (0x9<<20) | (0xF<<12) | (1<<8) | (1<<4);	/* arguably, ACMPF should expand to RNDF, CMPD */
+
+	case AMOVF:
+	case AMOVDF:	return o | (0xe<<24) | (0x0<<20) | (1<<15) | (1<<8);
+	case AMOVD:
+	case AMOVFD:	return o | (0xe<<24) | (0x0<<20) | (1<<15) | (1<<8) | (1<<7);
+
+	case AMOVWF:	return o | (0xe<<24) | (0<<20) | (1<<8) | (1<<4);
+	case AMOVWD:	return o | (0xe<<24) | (0<<20) | (1<<8) | (1<<4) | (1<<7);
+	case AMOVFW:	return o | (0xe<<24) | (1<<20) | (1<<8) | (1<<4);
+	case AMOVDW:	return o | (0xe<<24) | (1<<20) | (1<<8) | (1<<4) | (1<<7);
+	}
+	diag("bad rrr %d", a);
+	prasm(curp);
+	return 0;
+}
+
+long
+opbra(int a, int sc)
+{
+
+	if(sc & (C_SBIT|C_PBIT|C_WBIT))
+		diag(".S/.P/.W on bra instruction");
+	sc &= C_SCOND;
+	if(a == ABL)
+		return (sc<<28)|(0x5<<25)|(0x1<<24);
+	if(sc != 0xe)
+		diag(".COND on bcond instruction");
+	switch(a) {
+	case ABEQ:	return (0x0<<28)|(0x5<<25);
+	case ABNE:	return (0x1<<28)|(0x5<<25);
+	case ABCS:	return (0x2<<28)|(0x5<<25);
+	case ABHS:	return (0x2<<28)|(0x5<<25);
+	case ABCC:	return (0x3<<28)|(0x5<<25);
+	case ABLO:	return (0x3<<28)|(0x5<<25);
+	case ABMI:	return (0x4<<28)|(0x5<<25);
+	case ABPL:	return (0x5<<28)|(0x5<<25);
+	case ABVS:	return (0x6<<28)|(0x5<<25);
+	case ABVC:	return (0x7<<28)|(0x5<<25);
+	case ABHI:	return (0x8<<28)|(0x5<<25);
+	case ABLS:	return (0x9<<28)|(0x5<<25);
+	case ABGE:	return (0xa<<28)|(0x5<<25);
+	case ABLT:	return (0xb<<28)|(0x5<<25);
+	case ABGT:	return (0xc<<28)|(0x5<<25);
+	case ABLE:	return (0xd<<28)|(0x5<<25);
+	case AB:	return (0xe<<28)|(0x5<<25);
+	}
+	diag("bad bra %A", a);
+	prasm(curp);
+	return 0;
+}
+
+long
+olr(long v, int b, int r, int sc)
+{
+	long o;
+
+	if(sc & C_SBIT)
+		diag(".S on LDR/STR instruction");
+	o = (sc & C_SCOND) << 28;
+	if(!(sc & C_PBIT))
+		o |= 1 << 24;
+	if(!(sc & C_UBIT))
+		o |= 1 << 23;
+	if(sc & C_WBIT)
+		o |= 1 << 21;
+	o |= (0x1<<26) | (1<<20);
+	if(v < 0) {
+		v = -v;
+		o ^= 1 << 23;
+	}
+	if(v >= (1<<12))
+		diag("literal span too large: %d (R%d)\n%P", v, b, PP);
+	o |= v;
+	o |= b << 16;
+	o |= r << 12;
+	return o;
+}
+
+long
+olhr(long v, int b, int r, int sc)
+{
+	long o;
+
+	if(sc & C_SBIT)
+		diag(".S on LDRH/STRH instruction");
+	o = (sc & C_SCOND) << 28;
+	if(!(sc & C_PBIT))
+		o |= 1 << 24;
+	if(sc & C_WBIT)
+		o |= 1 << 21;
+	o |= (1<<23) | (1<<20)|(0xb<<4);
+	if(v < 0) {
+		v = -v;
+		o ^= 1 << 23;
+	}
+	if(v >= (1<<8))
+		diag("literal span too large: %d (R%d)\n%P", v, b, PP);
+	o |= (v&0xf)|((v>>4)<<8)|(1<<22);
+	o |= b << 16;
+	o |= r << 12;
+	return o;
+}
+
+long
+osr(int a, int r, long v, int b, int sc)
+{
+	long o;
+
+	o = olr(v, b, r, sc) ^ (1<<20);
+	if(a != AMOVW)
+		o |= 1<<22;
+	return o;
+}
+
+long
+oshr(int r, long v, int b, int sc)
+{
+	long o;
+
+	o = olhr(v, b, r, sc) ^ (1<<20);
+	return o;
+}
+	
+
+long
+osrr(int r, int i, int b, int sc)
+{
+
+	return olr(i, b, r, sc) ^ ((1<<25) | (1<<20));
+}
+
+long
+oshrr(int r, int i, int b, int sc)
+{
+	return olhr(i, b, r, sc) ^ ((1<<22) | (1<<20));
+}
+
+long
+olrr(int i, int b, int r, int sc)
+{
+
+	return olr(i, b, r, sc) ^ (1<<25);
+}
+
+long
+olhrr(int i, int b, int r, int sc)
+{
+	return olhr(i, b, r, sc) ^ (1<<22);
+}
+
+long
+ofsr(int a, int r, long v, int b, int sc, Prog *p)
+{
+	long o;
+
+	if(sc & C_SBIT)
+		diag(".S on FLDR/FSTR instruction");
+	o = (sc & C_SCOND) << 28;
+	if(!(sc & C_PBIT))
+		o |= 1 << 24;
+	if(sc & C_WBIT)
+		o |= 1 << 21;
+	o |= (6<<25) | (1<<24) | (1<<23);
+	if(v < 0) {
+		v = -v;
+		o ^= 1 << 23;
+	}
+	if(v & 3)
+		diag("odd offset for floating point op: %d\n%P", v, p);
+	else if(v >= (1<<10))
+		diag("literal span too large: %d\n%P", v, p);
+	o |= (v>>2) & 0xFF;
+	o |= b << 16;
+	o |= r << 12;
+	o |= 1 << 8;
+
+	switch(a) {
+	default:
+		diag("bad fst %A", a);
+	case AMOVD:
+		o |= 1<<15;
+	case AMOVF:
+		break;
+	}
+	return o;
+}
+
+long
+omvl(Prog *p, Adr *a, int dr)
+{	
+	long v, o1;
+	if(!p->cond) {
+		aclass(a);
+		v = immrot(~instoffset);
+		if(v == 0) {
+			diag("missing literal");
+			prasm(p);
+			return 0;
+		}
+		o1 = oprrr(AMVN, p->scond&C_SCOND);
+		o1 |= v;
+		o1 |= dr << 12;
+	} else {
+		v = p->cond->pc - p->pc - 8;
+		o1 = olr(v, REGPC, dr, p->scond&C_SCOND);
+	}
+	return o1;
+}
+
+static Ieee chipfloats[] = {
+	{0x00000000, 0x00000000}, /* 0 */
+	{0x00000000, 0x3ff00000}, /* 1 */
+	{0x00000000, 0x40000000}, /* 2 */
+	{0x00000000, 0x40080000}, /* 3 */
+	{0x00000000, 0x40100000}, /* 4 */
+	{0x00000000, 0x40140000}, /* 5 */
+	{0x00000000, 0x3fe00000}, /* .5 */
+	{0x00000000, 0x40240000}, /* 10 */
+};
+
+int
+chipfloat(Ieee *e)
+{
+	Ieee *p;
+	int n;
+
+	for(n = sizeof(chipfloats)/sizeof(chipfloats[0]); --n >= 0;){
+		p = &chipfloats[n];
+		if(p->l == e->l && p->h == e->h)
+			return n;
+	}
+	return -1;
+}
diff --git a/sys/src/cmd/tl/l.h b/sys/src/cmd/tl/l.h
new file mode 100644
index 000000000..e63dcdaae
--- /dev/null
+++ b/sys/src/cmd/tl/l.h
@@ -0,0 +1,445 @@
+#include	<u.h>
+#include	<libc.h>
+#include	<bio.h>
+#include	"../5c/5.out.h"
+
+#ifndef	EXTERN
+#define	EXTERN	extern
+#endif
+
+/* do not undefine this - code will be removed eventually */
+#define	CALLEEBX
+
+typedef	struct	Adr	Adr;
+typedef	struct	Sym	Sym;
+typedef	struct	Autom	Auto;
+typedef	struct	Prog	Prog;
+typedef	struct	Optab	Optab;
+typedef	struct	Oprang	Oprang;
+typedef	uchar	Opcross[32][2][32];
+typedef	struct	Count	Count;
+typedef	struct	Use	Use;
+
+#define	P		((Prog*)0)
+#define	S		((Sym*)0)
+#define	U		((Use*)0)
+#define	TNAME		(curtext&&curtext->from.sym?curtext->from.sym->name:noname)
+
+struct	Adr
+{
+	union
+	{
+		long	u0offset;
+		char*	u0sval;
+		Ieee*	u0ieee;
+	} u0;
+	union
+	{
+		Auto*	u1autom;
+		Sym*	u1sym;
+	} u1;
+	char	type;
+	char	reg;
+	char	name;
+	char	class;
+};
+
+#define	offset	u0.u0offset
+#define	sval	u0.u0sval
+#define	ieee	u0.u0ieee
+
+#define	autom	u1.u1autom
+#define	sym	u1.u1sym
+
+struct	Prog
+{
+	Adr	from;
+	Adr	to;
+	union
+	{
+		long	u0regused;
+		Prog*	u0forwd;
+	} u0;
+	Prog*	cond;
+	Prog*	link;
+	long	pc;
+	long	line;
+	uchar	mark;
+	uchar	optab;
+	uchar	as;
+	uchar	scond;
+	uchar	reg;
+	uchar	align;
+};
+#define	regused	u0.u0regused
+#define	forwd	u0.u0forwd
+
+struct	Sym
+{
+	char	*name;
+	short	type;
+	short	version;
+	short	become;
+	short	frame;
+	uchar	subtype;
+	ushort	file;
+	long	value;
+	long	sig;
+	uchar	used;
+	uchar	thumb;	// thumb code
+	uchar	foreign;	// called by arm if thumb, by thumb if arm
+	uchar	fnptr;	// used as fn ptr
+	Use*		use;
+	Sym*	link;
+};
+
+#define SIGNINTERN	(1729*325*1729)
+
+struct	Autom
+{
+	Sym*	asym;
+	Auto*	link;
+	long	aoffset;
+	short	type;
+};
+struct	Optab
+{
+	char	as;
+	char	a1;
+	char	a2;
+	char	a3;
+	char	type;
+	char	size;
+	char	param;
+	char	flag;
+};
+struct	Oprang
+{
+	Optab*	start;
+	Optab*	stop;
+};
+struct	Count
+{
+	long	count;
+	long	outof;
+};
+struct	Use
+{
+	Prog*	p;	/* use */
+	Prog*	ct;	/* curtext */
+	Use*		link;
+};
+
+enum
+{
+	STEXT		= 1,
+	SDATA,
+	SBSS,
+	SDATA1,
+	SXREF,
+	SLEAF,
+	SFILE,
+	SCONST,
+	SSTRING,
+	SUNDEF,
+	SREMOVED,
+
+	SIMPORT,
+	SEXPORT,
+
+	LFROM		= 1<<0,
+	LTO		= 1<<1,
+	LPOOL		= 1<<2,
+	V4		= 1<<3,	/* arm v4 arch */
+
+	C_NONE		= 0,
+	C_REG,
+	C_REGREG,
+	C_SHIFT,
+	C_FREG,
+	C_PSR,
+	C_FCR,
+
+	C_RCON,		/* 0xff rotated */
+	C_NCON,		/* ~RCON */
+	C_SCON,		/* 0xffff */
+	C_BCON,		/* thumb */
+	C_LCON,
+	C_FCON,
+	C_GCON,		/* thumb */
+
+	C_RACON,
+	C_SACON,	/* thumb */
+	C_LACON,
+	C_GACON,	/* thumb */
+
+	C_RECON,
+	C_LECON,
+
+	C_SBRA,
+	C_LBRA,
+	C_GBRA,		/* thumb */
+
+	C_HAUTO,	/* halfword insn offset (-0xff to 0xff) */
+	C_FAUTO,	/* float insn offset (0 to 0x3fc, word aligned) */
+	C_HFAUTO,	/* both H and F */
+	C_SAUTO,	/* -0xfff to 0xfff */
+	C_LAUTO,
+
+	C_HEXT,
+	C_FEXT,
+	C_HFEXT,
+	C_SEXT,
+	C_LEXT,
+
+	C_HOREG,
+	C_FOREG,
+	C_HFOREG,
+	C_SOREG,
+	C_ROREG,
+	C_SROREG,	/* both S and R */
+	C_LOREG,
+	C_GOREG,		/* thumb */
+
+	C_PC,
+	C_SP,
+	C_HREG,
+	C_OFFPC,		/* thumb */
+
+	C_ADDR,		/* relocatable address */
+
+	C_GOK,
+
+/* mark flags */
+	FOLL		= 1<<0,
+	LABEL		= 1<<1,
+	LEAF		= 1<<2,
+
+	BIG		= (1<<12)-4,
+	STRINGSZ	= 200,
+	NHASH		= 10007,
+	NHUNK		= 100000,
+	MINSIZ		= 64,
+	NENT		= 100,
+	MAXIO		= 8192,
+	MAXHIST		= 20,	/* limit of path elements for history symbols */
+
+	Roffset	= 22,		/* no. bits for offset in relocation address */
+	Rindex	= 10,		/* no. bits for index in relocation address */
+};
+
+EXTERN union
+{
+	struct
+	{
+		uchar	obuf[MAXIO];			/* output buffer */
+		uchar	ibuf[MAXIO];			/* input buffer */
+	} u;
+	char	dbuf[1];
+} buf;
+
+#define	cbuf	u.obuf
+#define	xbuf	u.ibuf
+
+#define	setarch(p)		if((p)->as==ATEXT) thumb=(p)->reg&ALLTHUMBS
+#define	setthumb(p)	if((p)->as==ATEXT) seenthumb|=(p)->reg&ALLTHUMBS
+
+#ifndef COFFCVT
+
+EXTERN	long	HEADR;			/* length of header */
+EXTERN	int	HEADTYPE;		/* type of header */
+EXTERN	long	INITDAT;		/* data location */
+EXTERN	long	INITRND;		/* data round above text location */
+EXTERN	long	INITTEXT;		/* text location */
+EXTERN	char*	INITENTRY;		/* entry point */
+EXTERN	long	autosize;
+EXTERN	Biobuf	bso;
+EXTERN	long	bsssize;
+EXTERN	int	cbc;
+EXTERN	uchar*	cbp;
+EXTERN	int	cout;
+EXTERN	Auto*	curauto;
+EXTERN	Auto*	curhist;
+EXTERN	Prog*	curp;
+EXTERN	Prog*	curtext;
+EXTERN	Prog*	datap;
+EXTERN	long	datsize;
+EXTERN	char	debug[128];
+EXTERN	Prog*	etextp;
+EXTERN	Prog*	firstp;
+EXTERN	char	fnuxi4[4];
+EXTERN	char	fnuxi8[8];
+EXTERN	char*	noname;
+EXTERN	Sym*	hash[NHASH];
+EXTERN	Sym*	histfrog[MAXHIST];
+EXTERN	int	histfrogp;
+EXTERN	int	histgen;
+EXTERN	char*	library[50];
+EXTERN	char*	libraryobj[50];
+EXTERN	int	libraryp;
+EXTERN	int	xrefresolv;
+EXTERN	char*	hunk;
+EXTERN	char	inuxi1[1];
+EXTERN	char	inuxi2[2];
+EXTERN	char	inuxi4[4];
+EXTERN	Prog*	lastp;
+EXTERN	long	lcsize;
+EXTERN	char	literal[32];
+EXTERN	int	nerrors;
+EXTERN	long	nhunk;
+EXTERN	long	instoffset;
+EXTERN	Opcross	opcross[8];
+EXTERN	Oprang	oprange[ALAST];
+EXTERN	Oprang	thumboprange[ALAST];
+EXTERN	char*	outfile;
+EXTERN	long	pc;
+EXTERN	uchar	repop[ALAST];
+EXTERN	long	symsize;
+EXTERN	Prog*	textp;
+EXTERN	long	textsize;
+EXTERN	long	thunk;
+EXTERN	int	version;
+EXTERN	char	xcmp[C_GOK+1][C_GOK+1];
+EXTERN	Prog	zprg;
+EXTERN	int	dtype;
+EXTERN	int	armv4;
+EXTERN	int	thumb;
+EXTERN	int	seenthumb;
+EXTERN	int	armsize;
+
+EXTERN	int	doexp, dlm;
+EXTERN	int	imports, nimports;
+EXTERN	int	exports, nexports;
+EXTERN	char*	EXPTAB;
+EXTERN	Prog	undefp;
+
+#define	UP	(&undefp)
+
+extern	char*	anames[];
+extern	Optab	optab[];
+extern	Optab	thumboptab[];
+
+void	addpool(Prog*, Adr*);
+EXTERN	Prog*	blitrl;
+EXTERN	Prog*	elitrl;
+
+void	initdiv(void);
+EXTERN	Prog*	prog_div;
+EXTERN	Prog*	prog_divu;
+EXTERN	Prog*	prog_mod;
+EXTERN	Prog*	prog_modu;
+
+#pragma	varargck	type	"A"	int
+#pragma	varargck	type	"C"	int
+#pragma	varargck	type	"D"	Adr*
+#pragma	varargck	type	"N"	Adr*
+#pragma	varargck	type	"P"	Prog*
+#pragma	varargck	type	"S"	char*
+
+int	Aconv(Fmt*);
+int	Cconv(Fmt*);
+int	Dconv(Fmt*);
+int	Nconv(Fmt*);
+int	Pconv(Fmt*);
+int	Sconv(Fmt*);
+int	aclass(Adr*);
+int	thumbaclass(Adr*, Prog*);
+void	addhist(long, int);
+void	append(Prog*, Prog*);
+void	asmb(void);
+void	asmdyn(void);
+void	asmlc(void);
+void	asmthumbmap(void);
+void	asmout(Prog*, Optab*);
+void	thumbasmout(Prog*, Optab*);
+void	asmsym(void);
+long	atolwhex(char*);
+Prog*	brloop(Prog*);
+void	buildop(void);
+void	thumbbuildop(void);
+void	buildrep(int, int);
+void	cflush(void);
+void	ckoff(Sym*, long);
+int	chipfloat(Ieee*);
+int	cmp(int, int);
+int	compound(Prog*);
+double	cputime(void);
+void	datblk(long, long, int);
+void	diag(char*, ...);
+void	divsig(void);
+void	dodata(void);
+void	doprof1(void);
+void	doprof2(void);
+void	dynreloc(Sym*, long, int);
+long	entryvalue(void);
+void	errorexit(void);
+void	exchange(Prog*);
+void	export(void);
+int	find1(long, int);
+void	follow(void);
+void	gethunk(void);
+void	histtoauto(void);
+void	hputl(int);
+double	ieeedtod(Ieee*);
+long	ieeedtof(Ieee*);
+void	import(void);
+int	isnop(Prog*);
+void	ldobj(int, long, char*);
+void	loadlib(void);
+void	listinit(void);
+Sym*	lookup(char*, int);
+void	cput(int);
+void	hput(long);
+void	lput(long);
+void	lputl(long);
+void	mkfwd(void);
+void*	mysbrk(ulong);
+void	names(void);
+void	nocache(Prog*);
+void	nuxiinit(void);
+void	objfile(char*);
+int	ocmp(void*, void*);
+long	opirr(int);
+Optab*	oplook(Prog*);
+long	oprrr(int, int);
+long	olr(long, int, int, int);
+long	olhr(long, int, int, int);
+long	olrr(int, int, int, int);
+long	olhrr(int, int, int, int);
+long	osr(int, int, long, int, int);
+long	oshr(int, long, int, int);
+long	ofsr(int, int, long, int, int, Prog*);
+long	osrr(int, int, int, int);
+long	oshrr(int, int, int, int);
+long	omvl(Prog*, Adr*, int);
+void	patch(void);
+void	prasm(Prog*);
+void	prepend(Prog*, Prog*);
+Prog*	prg(void);
+int	pseudo(Prog*);
+void	putsymb(char*, int, long, int);
+void	readundefs(char*, int);
+long	regoff(Adr*);
+int	relinv(int);
+long	rnd(long, long);
+void	span(void);
+void	strnput(char*, int);
+void	undef(void);
+void	undefsym(Sym*);
+void	wput(long);
+void	xdefine(char*, int, long);
+void	xfol(Prog*);
+void	zerosig(char*);
+void	noops(void);
+long	immrot(ulong);
+long	immaddr(long);
+long	opbra(int, int);
+int	brextra(Prog*);
+int	isbranch(Prog*);
+int	fnpinc(Sym *);
+int	fninc(Sym *);
+void	thumbcount(void);
+void reachable(void);
+void fnptrs(void);
+
+#endif
diff --git a/sys/src/cmd/tl/list.c b/sys/src/cmd/tl/list.c
new file mode 100644
index 000000000..d8eb5f2b9
--- /dev/null
+++ b/sys/src/cmd/tl/list.c
@@ -0,0 +1,360 @@
+#include "l.h"
+
+void
+listinit(void)
+{
+
+	fmtinstall('A', Aconv);
+	fmtinstall('C', Cconv);
+	fmtinstall('D', Dconv);
+	fmtinstall('P', Pconv);
+	fmtinstall('S', Sconv);
+	fmtinstall('N', Nconv);
+}
+
+void
+prasm(Prog *p)
+{
+	print("%P\n", p);
+}
+
+int
+Pconv(Fmt *fp)
+{
+	char str[STRINGSZ], *s;
+	Prog *p;
+	int a;
+
+	p = va_arg(fp->args, Prog*);
+	curp = p;
+	a = p->as;
+	switch(a) {
+	default:
+		s = str;
+		s += sprint(s, "(%ld)", p->line);
+		if(p->reg == NREG)
+			sprint(s, "	%A%C	%D,%D",
+				a, p->scond, &p->from, &p->to);
+		else
+		if(p->from.type != D_FREG)
+			sprint(s, "	%A%C	%D,R%d,%D",
+				a, p->scond, &p->from, p->reg, &p->to);
+		else
+			sprint(s, "	%A%C	%D,F%d,%D",
+				a, p->scond, &p->from, p->reg, &p->to);
+		break;
+
+	case ASWPW:
+	case ASWPBU:
+		sprint(str, "(%ld)	%A%C	R%d,%D,%D",
+			p->line, a, p->scond, p->reg, &p->from, &p->to);
+		break;
+
+	case ADATA:
+	case AINIT:
+	case ADYNT:
+		sprint(str, "(%ld)	%A%C	%D/%d,%D",
+			p->line, a, p->scond, &p->from, p->reg, &p->to);
+		break;
+
+	case AWORD:
+		sprint(str, "WORD %ld", p->to.offset);
+		break;
+
+	case ADWORD:
+		sprint(str, "DWORD %ld %ld", p->from.offset, p->to.offset);
+		break;
+	}
+	return fmtstrcpy(fp, str);
+}
+
+int
+Aconv(Fmt *fp)
+{
+	char *s;
+	int a;
+
+	a = va_arg(fp->args, int);
+	s = "?";
+	if(a >= AXXX && a < ALAST)
+		s = anames[a];
+	return fmtstrcpy(fp, s);
+}
+
+char*	strcond[16] =
+{
+	".EQ",
+	".NE",
+	".HS",
+	".LO",
+	".MI",
+	".PL",
+	".VS",
+	".VC",
+	".HI",
+	".LS",
+	".GE",
+	".LT",
+	".GT",
+	".LE",
+	"",
+	".NV"
+};
+
+int
+Cconv(Fmt *fp)
+{
+	char s[20];
+	int c;
+
+	c = va_arg(fp->args, int);
+	strcpy(s, strcond[c & C_SCOND]);
+	if(c & C_SBIT)
+		strcat(s, ".S");
+	if(c & C_PBIT)
+		strcat(s, ".P");
+	if(c & C_WBIT)
+		strcat(s, ".W");
+	if(c & C_UBIT)		/* ambiguous with FBIT */
+		strcat(s, ".U");
+	return fmtstrcpy(fp, s);
+}
+
+int
+Dconv(Fmt *fp)
+{
+	char str[STRINGSZ];
+	char *op;
+	Adr *a;
+	long v;
+
+	a = va_arg(fp->args, Adr*);
+	switch(a->type) {
+
+	default:
+		sprint(str, "GOK-type(%d)", a->type);
+		break;
+
+	case D_NONE:
+		str[0] = 0;
+		if(a->name != D_NONE || a->reg != NREG || a->sym != S)
+			sprint(str, "%N(R%d)(NONE)", a, a->reg);
+		break;
+
+	case D_CONST:
+		if(a->reg == NREG)
+			sprint(str, "$%N", a);
+		else
+			sprint(str, "$%N(R%d)", a, a->reg);
+		break;
+
+	case D_SHIFT:
+		v = a->offset;
+		op = "<<>>->@>" + (((v>>5) & 3) << 1);
+		if(v & (1<<4))
+			sprint(str, "R%ld%c%cR%ld", v&15, op[0], op[1], (v>>8)&15);
+		else
+			sprint(str, "R%ld%c%c%ld", v&15, op[0], op[1], (v>>7)&31);
+		if(a->reg != NREG)
+			sprint(str+strlen(str), "(R%d)", a->reg);
+		break;
+
+	case D_OCONST:
+		sprint(str, "$*$%N", a);
+		if(a->reg != NREG)
+			sprint(str, "%N(R%d)(CONST)", a, a->reg);
+		break;
+
+	case D_OREG:
+		if(a->reg != NREG)
+			sprint(str, "%N(R%d)", a, a->reg);
+		else
+			sprint(str, "%N", a);
+		break;
+
+	case D_REG:
+		sprint(str, "R%d", a->reg);
+		if(a->name != D_NONE || a->sym != S)
+			sprint(str, "%N(R%d)(REG)", a, a->reg);
+		break;
+
+	case D_REGREG:
+		sprint(str, "(R%d,R%d)", a->reg, (int)a->offset);
+		if(a->name != D_NONE || a->sym != S)
+			sprint(str, "%N(R%d)(REG)", a, a->reg);
+		break;
+
+	case D_FREG:
+		sprint(str, "F%d", a->reg);
+		if(a->name != D_NONE || a->sym != S)
+			sprint(str, "%N(R%d)(REG)", a, a->reg);
+		break;
+
+	case D_PSR:
+		switch(a->reg) {
+		case 0:
+			sprint(str, "CPSR");
+			break;
+		case 1:
+			sprint(str, "SPSR");
+			break;
+		default:
+			sprint(str, "PSR%d", a->reg);
+			break;
+		}
+		if(a->name != D_NONE || a->sym != S)
+			sprint(str, "%N(PSR%d)(REG)", a, a->reg);
+		break;
+
+	case D_FPCR:
+		switch(a->reg){
+		case 0:
+			sprint(str, "FPSR");
+			break;
+		case 1:
+			sprint(str, "FPCR");
+			break;
+		default:
+			sprint(str, "FCR%d", a->reg);
+			break;
+		}
+		if(a->name != D_NONE || a->sym != S)
+			sprint(str, "%N(FCR%d)(REG)", a, a->reg);
+
+		break;
+
+	case D_BRANCH:	/* botch */
+		if(curp->cond != P) {
+			v = curp->cond->pc;
+			if(a->sym != S)
+				sprint(str, "%s+%.5lux(BRANCH)", a->sym->name, v);
+			else
+				sprint(str, "%.5lux(BRANCH)", v);
+		} else
+			if(a->sym != S)
+				sprint(str, "%s+%ld(APC)", a->sym->name, a->offset);
+			else
+				sprint(str, "%ld(APC)", a->offset);
+		break;
+
+	case D_FCONST:
+		sprint(str, "$%e", ieeedtod(a->ieee));
+		break;
+
+	case D_SCONST:
+		sprint(str, "$\"%S\"", a->sval);
+		break;
+	}
+	return fmtstrcpy(fp, str);
+}
+
+int
+Nconv(Fmt *fp)
+{
+	char str[STRINGSZ];
+	Adr *a;
+	Sym *s;
+
+	a = va_arg(fp->args, Adr*);
+	s = a->sym;
+	switch(a->name) {
+	default:
+		sprint(str, "GOK-name(%d)", a->name);
+		break;
+
+	case D_NONE:
+		sprint(str, "%ld", a->offset);
+		break;
+
+	case D_EXTERN:
+		if(s == S)
+			sprint(str, "%ld(SB)", a->offset);
+		else
+			sprint(str, "%s+%ld(SB)", s->name, a->offset);
+		break;
+
+	case D_STATIC:
+		if(s == S)
+			sprint(str, "<>+%ld(SB)", a->offset);
+		else
+			sprint(str, "%s<>+%ld(SB)", s->name, a->offset);
+		break;
+
+	case D_AUTO:
+		if(s == S)
+			sprint(str, "%ld(SP)", a->offset);
+		else
+			sprint(str, "%s-%ld(SP)", s->name, -a->offset);
+		break;
+
+	case D_PARAM:
+		if(s == S)
+			sprint(str, "%ld(FP)", a->offset);
+		else
+			sprint(str, "%s+%ld(FP)", s->name, a->offset);
+		break;
+	}
+	return fmtstrcpy(fp, str);
+}
+
+int
+Sconv(Fmt *fp)
+{
+	int i, c;
+	char str[STRINGSZ], *p, *a;
+
+	a = va_arg(fp->args, char*);
+	p = str;
+	for(i=0; i<sizeof(long); i++) {
+		c = a[i] & 0xff;
+		if(c >= 'a' && c <= 'z' ||
+		   c >= 'A' && c <= 'Z' ||
+		   c >= '0' && c <= '9' ||
+		   c == ' ' || c == '%') {
+			*p++ = c;
+			continue;
+		}
+		*p++ = '\\';
+		switch(c) {
+		case 0:
+			*p++ = 'z';
+			continue;
+		case '\\':
+		case '"':
+			*p++ = c;
+			continue;
+		case '\n':
+			*p++ = 'n';
+			continue;
+		case '\t':
+			*p++ = 't';
+			continue;
+		}
+		*p++ = (c>>6) + '0';
+		*p++ = ((c>>3) & 7) + '0';
+		*p++ = (c & 7) + '0';
+	}
+	*p = 0;
+	return fmtstrcpy(fp, str);
+}
+
+void
+diag(char *fmt, ...)
+{
+	char buf[STRINGSZ], *tn;
+	va_list arg;
+
+	tn = "??none??";
+	if(curtext != P && curtext->from.sym != S)
+		tn = curtext->from.sym->name;
+	va_start(arg, fmt);
+	vseprint(buf, buf+sizeof(buf), fmt, arg);
+	va_end(arg);
+	print("%s: %s\n", tn, buf);
+
+	nerrors++;
+	if(nerrors > 10) {
+		print("too many errors\n");
+		errorexit();
+	}
+}
diff --git a/sys/src/cmd/tl/mkfile b/sys/src/cmd/tl/mkfile
new file mode 100644
index 000000000..5b93c949c
--- /dev/null
+++ b/sys/src/cmd/tl/mkfile
@@ -0,0 +1,25 @@
+</$objtype/mkfile
+
+TARG=tl
+
+OFILES=\
+	asm.$O\
+	list.$O\
+	noop.$O\
+	obj.$O\
+	optab.$O\
+	pass.$O\
+	span.$O\
+	enam.$O\
+	thumb.$O\
+
+HFILES=\
+	l.h\
+	../5c/5.out.h\
+
+BIN=/$objtype/bin
+</sys/src/cmd/mkone
+
+enam.$O:	../5c/enam.c
+	$CC $CFLAGS ../5c/enam.c
+
diff --git a/sys/src/cmd/tl/noop.c b/sys/src/cmd/tl/noop.c
new file mode 100644
index 000000000..08ef6dbe1
--- /dev/null
+++ b/sys/src/cmd/tl/noop.c
@@ -0,0 +1,894 @@
+#include	"l.h"
+
+static	Sym*	sym_div;
+static	Sym*	sym_divu;
+static	Sym*	sym_mod;
+static	Sym*	sym_modu;
+
+static void setdiv(int);
+
+static Prog *
+movrr(Prog *q, int rs, int rd, Prog *p)
+{
+	if(q == nil)
+		q = prg();
+	q->as = AMOVW;
+	q->line = p->line;
+	q->from.type = D_REG;
+	q->from.reg = rs;
+	q->to.type = D_REG;
+	q->to.reg = rd;
+	q->link = p->link;
+	return q;
+}
+
+static Prog *
+fnret(Prog *q, int rs, int foreign, Prog *p)
+{
+	q = movrr(q, rs, REGPC, p);
+	if(foreign){	// BX rs
+		q->as = ABXRET;
+		q->from.type = D_NONE;
+		q->from.reg = NREG;
+		q->to.reg = rs;
+	}
+	return q;
+}
+
+static Prog *
+aword(long w, Prog *p)
+{
+	Prog *q;
+
+	q = prg();
+	q->as = AWORD;
+	q->line = p->line;
+	q->from.type = D_NONE;
+	q->reg = NREG;
+	q->to.type = D_CONST;
+	q->to.offset = w;
+	q->link = p->link;
+	p->link = q;
+	return q;
+}
+
+static Prog *
+adword(long w1, long w2, Prog *p)
+{
+	Prog *q;
+
+	q = prg();
+	q->as = ADWORD;
+	q->line = p->line;
+	q->from.type = D_CONST;
+	q->from.offset = w1;
+	q->reg = NREG;
+	q->to.type = D_CONST;
+	q->to.offset = w2;
+	q->link = p->link;
+	p->link = q;
+	return q;
+}
+
+void
+noops(void)
+{
+	Prog *p, *q, *q1, *q2;
+	int o, curframe, curbecome, maxbecome, foreign;
+
+	/*
+	 * find leaf subroutines
+	 * become sizes
+	 * frame sizes
+	 * strip NOPs
+	 * expand RET
+	 * expand BECOME pseudo
+	 */
+
+	if(debug['v'])
+		Bprint(&bso, "%5.2f noops\n", cputime());
+	Bflush(&bso);
+
+	curframe = 0;
+	curbecome = 0;
+	maxbecome = 0;
+	curtext = 0;
+
+	q = P;
+	for(p = firstp; p != P; p = p->link) {
+		setarch(p);
+
+		/* find out how much arg space is used in this TEXT */
+		if(p->to.type == D_OREG && p->to.reg == REGSP)
+			if(p->to.offset > curframe)
+				curframe = p->to.offset;
+
+		switch(p->as) {
+		case ATEXT:
+			if(curtext && curtext->from.sym) {
+				curtext->from.sym->frame = curframe;
+				curtext->from.sym->become = curbecome;
+				if(curbecome > maxbecome)
+					maxbecome = curbecome;
+			}
+			curframe = 0;
+			curbecome = 0;
+
+			p->mark |= LEAF;
+			curtext = p;
+			break;
+
+		case ARET:
+			/* special form of RET is BECOME */
+			if(p->from.type == D_CONST)
+				if(p->from.offset > curbecome)
+					curbecome = p->from.offset;
+			break;
+
+		case ADIV:
+		case ADIVU:
+		case AMOD:
+		case AMODU:
+			q = p;
+			if(prog_div == P)
+				initdiv();
+			if(curtext != P)
+				curtext->mark &= ~LEAF;
+			setdiv(p->as);
+			continue;
+
+		case ANOP:
+			q1 = p->link;
+			q->link = q1;		/* q is non-nop */
+			q1->mark |= p->mark;
+			continue;
+
+		case ABL:
+		case ABX:
+			if(curtext != P)
+				curtext->mark &= ~LEAF;
+
+		case ABCASE:
+		case AB:
+
+		case ABEQ:
+		case ABNE:
+		case ABCS:
+		case ABHS:
+		case ABCC:
+		case ABLO:
+		case ABMI:
+		case ABPL:
+		case ABVS:
+		case ABVC:
+		case ABHI:
+		case ABLS:
+		case ABGE:
+		case ABLT:
+		case ABGT:
+		case ABLE:
+
+			q1 = p->cond;
+			if(q1 != P) {
+				while(q1->as == ANOP) {
+					q1 = q1->link;
+					p->cond = q1;
+				}
+			}
+			break;
+		}
+		q = p;
+	}
+
+	if(curtext && curtext->from.sym) {
+		curtext->from.sym->frame = curframe;
+		curtext->from.sym->become = curbecome;
+		if(curbecome > maxbecome)
+			maxbecome = curbecome;
+	}
+
+	if(debug['b'])
+		print("max become = %d\n", maxbecome);
+	xdefine("ALEFbecome", STEXT, maxbecome);
+
+	curtext = 0;
+	for(p = firstp; p != P; p = p->link) {
+		setarch(p);
+		switch(p->as) {
+		case ATEXT:
+			curtext = p;
+			break;
+		case ABL:
+		// case ABX:
+			if(curtext != P && curtext->from.sym != S && curtext->to.offset >= 0) {
+				o = maxbecome - curtext->from.sym->frame;
+				if(o <= 0)
+					break;
+				/* calling a become or calling a variable */
+				if(p->to.sym == S || p->to.sym->become) {
+					curtext->to.offset += o;
+					if(debug['b']) {
+						curp = p;
+						print("%D calling %D increase %d\n",
+							&curtext->from, &p->to, o);
+					}
+				}
+			}
+			break;
+		}
+	}
+
+	for(p = firstp; p != P; p = p->link) {
+		setarch(p);
+		o = p->as;
+		switch(o) {
+		case ATEXT:
+			curtext = p;
+			autosize = p->to.offset + 4;
+			if(autosize <= 4)
+			if(curtext->mark & LEAF) {
+				p->to.offset = -4;
+				autosize = 0;
+			}
+
+			if(!autosize && !(curtext->mark & LEAF)) {
+				if(debug['v'])
+					Bprint(&bso, "save suppressed in: %s\n",
+						curtext->from.sym->name);
+				Bflush(&bso);
+				curtext->mark |= LEAF;
+			}
+#ifdef CALLEEBX
+			if(p->from.sym->foreign){
+				if(thumb)
+					// don't allow literal pool to seperate these
+					p = adword(0xe28f7001, 0xe12fff17, p); // arm add 1, pc, r7 and bx r7
+					// p = aword(0xe12fff17, aword(0xe28f7001, p)); // arm add 1, pc, r7 and bx r7
+				else
+					p = aword(0x4778, p);	// thumb bx pc and 2 bytes padding
+			}
+#endif
+			if(curtext->mark & LEAF) {
+				if(curtext->from.sym)
+					curtext->from.sym->type = SLEAF;
+#ifdef optimise_time
+				if(autosize) {
+					q = prg();
+					q->as = ASUB;
+					q->line = p->line;
+					q->from.type = D_CONST;
+					q->from.offset = autosize;
+					q->to.type = D_REG;
+					q->to.reg = REGSP;
+
+					q->link = p->link;
+					p->link = q;
+				}
+				break;
+#else
+				if(!autosize)
+					break;
+#endif
+			}
+
+			if(thumb){
+				if(!(curtext->mark & LEAF)){
+					q = movrr(nil, REGLINK, REGTMPT-1, p);
+					p->link = q;
+					q1 = prg();
+					q1->as = AMOVW;
+					q1->line = p->line;
+					q1->from.type = D_REG;
+					q1->from.reg = REGTMPT-1;
+					q1->to.type = D_OREG;
+					q1->to.name = D_NONE;
+					q1->to.reg = REGSP;
+					q1->to.offset = 0;
+					q1->link = q->link;
+					q->link = q1;
+				}
+				if(autosize){
+					q2 = prg();
+					q2->as = ASUB;
+					q2->line = p->line;
+					q2->from.type = D_CONST;
+					q2->from.offset = autosize;
+					q2->to.type = D_REG;
+					q2->to.reg = REGSP;
+					q2->link = p->link;
+					p->link = q2;
+				}
+				break;
+			}
+
+			q1 = prg();
+			q1->as = AMOVW;
+			q1->scond |= C_WBIT;
+			q1->line = p->line;
+			q1->from.type = D_REG;
+			q1->from.reg = REGLINK;
+			q1->to.type = D_OREG;
+			q1->to.offset = -autosize;
+			q1->to.reg = REGSP;
+			q1->link = p->link;
+			p->link = q1;
+			break;
+
+		case ARET:
+			nocache(p);
+			foreign = seenthumb && curtext->from.sym != S && (curtext->from.sym->foreign || curtext->from.sym->fnptr);
+// print("%s %d %d\n", curtext->from.sym->name, curtext->from.sym->foreign, curtext->from.sym->fnptr);
+			if(p->from.type == D_CONST)
+				goto become;
+			if(curtext->mark & LEAF) {
+				if(!autosize) {
+					if(thumb){
+						p = fnret(p, REGLINK, foreign, p);
+						break;
+					}
+// if(foreign) print("ABXRET 1 %s\n", curtext->from.sym->name);
+					p->as = foreign ? ABXRET : AB;
+					p->from = zprg.from;
+					p->to.type = D_OREG;
+					p->to.offset = 0;
+					p->to.reg = REGLINK;
+					break;
+				}
+
+#ifdef optimise_time
+				p->as = AADD;
+				p->from.type = D_CONST;
+				p->from.offset = autosize;
+				p->to.type = D_REG;
+				p->to.reg = REGSP;
+				if(thumb){
+					p->link = fnret(nil, REGLINK, foreign, p);
+					break;
+				}
+				q = prg();
+// if(foreign) print("ABXRET 2 %s\n", curtext->from.sym->name);
+				q->as = foreign ? ABXRET : AB;
+				q->scond = p->scond;
+				q->line = p->line;
+				q->to.type = D_OREG;
+				q->to.offset = 0;
+				q->to.reg = REGLINK;
+
+				q->link = p->link;
+				p->link = q;
+
+				break;
+#endif
+			}
+			if(thumb){
+				if(curtext->mark & LEAF){
+					if(autosize){
+						p->as = AADD;
+						p->from.type = D_CONST;
+						p->from.offset = autosize;
+						p->to.type = D_REG;
+						p->to.reg = REGSP;
+						q = nil;
+					}
+					else
+						q = p;
+					q = fnret(q, REGLINK, foreign, p);
+					if(q != p)
+						p->link = q;
+				}
+				else{
+					p->as = AMOVW;
+					p->from.type = D_OREG;
+					p->from.name = D_NONE;
+					p->from.reg = REGSP;
+					p->from.offset = 0;
+					p->to.type = D_REG;
+					p->to.reg = REGTMPT-1;
+					if(autosize){
+						q = prg();
+						q->as = AADD;
+						q->from.type = D_CONST;
+						q->from.offset = autosize;
+						q->to.type = D_REG;
+						q->to.reg = REGSP;
+						q->link = p->link;
+						p->link = 	q;
+					}
+					else
+						q = p;
+					q1 = fnret(nil, REGTMPT-1, foreign, p);
+					q1->link = q->link;
+					q->link = q1;
+				}
+				break;
+			}
+			if(foreign) {
+// if(foreign) print("ABXRET 3 %s\n", curtext->from.sym->name);
+#define	R	1
+				p->as = AMOVW;
+				p->from.type = D_OREG;
+				p->from.name = D_NONE;
+				p->from.reg = REGSP;
+				p->from.offset = 0;
+				p->to.type = D_REG;
+				p->to.reg = R;
+				q = prg();
+				q->as = AADD;
+				q->scond = p->scond;
+				q->line = p->line;
+				q->from.type = D_CONST;
+				q->from.offset = autosize;
+				q->to.type = D_REG;
+				q->to.reg = REGSP;
+				q->link = p->link;
+				p->link = q;
+				q1 = prg();
+				q1->as = ABXRET;
+				q1->scond = p->scond;
+				q1->line = p->line;
+				q1->to.type = D_OREG;
+				q1->to.offset = 0;
+				q1->to.reg = R;
+				q1->link = q->link;
+				q->link = q1;
+#undef	R
+			}
+			else {
+				p->as = AMOVW;
+				p->scond |= C_PBIT;
+				p->from.type = D_OREG;
+				p->from.offset = autosize;
+				p->from.reg = REGSP;
+				p->to.type = D_REG;
+				p->to.reg = REGPC;
+			}
+			break;
+
+		become:
+			if(foreign){
+				diag("foreign become - help");
+				break;
+			}
+			if(thumb){
+				diag("thumb become - help");
+				break;
+			}
+			print("arm become\n");
+			if(curtext->mark & LEAF) {
+
+				if(!autosize) {
+					p->as = AB;
+					p->from = zprg.from;
+					break;
+				}
+
+#ifdef optimise_time
+				q = prg();
+				q->scond = p->scond;
+				q->line = p->line;
+				q->as = AB;
+				q->from = zprg.from;
+				q->to = p->to;
+				q->cond = p->cond;
+				q->link = p->link;
+				p->link = q;
+
+				p->as = AADD;
+				p->from = zprg.from;
+				p->from.type = D_CONST;
+				p->from.offset = autosize;
+				p->to = zprg.to;
+				p->to.type = D_REG;
+				p->to.reg = REGSP;
+
+				break;
+#endif
+			}
+			q = prg();
+			q->scond = p->scond;
+			q->line = p->line;
+			q->as = AB;
+			q->from = zprg.from;
+			q->to = p->to;
+			q->cond = p->cond;
+			q->link = p->link;
+			p->link = q;
+			if(thumb){
+				q1 = prg();
+				q1->line = p->line;
+				q1->as = AADD;
+				q1->from.type = D_CONST;
+				q1->from.offset = autosize;
+				q1->to.type = D_REG;
+				q1->to.reg = REGSP;
+				p->as = AMOVW;
+				p->line = p->line;
+				p->from.type = D_OREG;
+				p->from.name = D_NONE;
+				p->from.reg = REGSP;
+				p->from.offset = 0;
+				p->to.type = D_REG;
+				p->to.reg = REGTMPT-1;
+				q1->link = q;
+				p->link = q1;
+				q2 = movrr(nil, REGTMPT-1, REGLINK, p);
+				q2->link = q;
+				q1->link = q2;
+				break;
+			}
+			p->as = AMOVW;
+			p->scond |= C_PBIT;
+			p->from = zprg.from;
+			p->from.type = D_OREG;
+			p->from.offset = autosize;
+			p->from.reg = REGSP;
+			p->to = zprg.to;
+			p->to.type = D_REG;
+			p->to.reg = REGLINK;
+
+			break;
+
+		case ADIV:
+		case ADIVU:
+		case AMOD:
+		case AMODU:
+			if(debug['M'])
+				break;
+			if(p->from.type != D_REG)
+				break;
+			if(p->to.type != D_REG)
+				break;
+			q1 = p;
+
+			/* MOV a,4(SP) */
+			q = prg();
+			q->link = p->link;
+			p->link = q;
+			p = q;
+
+			p->as = AMOVW;
+			p->line = q1->line;
+			p->from.type = D_REG;
+			p->from.reg = q1->from.reg;
+			p->to.type = D_OREG;
+			p->to.reg = REGSP;
+			p->to.offset = 4;
+
+			/* MOV b,REGTMP */
+			q = prg();
+			q->link = p->link;
+			p->link = q;
+			p = q;
+
+			p->as = AMOVW;
+			p->line = q1->line;
+			p->from.type = D_REG;
+			p->from.reg = q1->reg;
+			if(q1->reg == NREG)
+				p->from.reg = q1->to.reg;
+			p->to.type = D_REG;
+			p->to.reg = prog_div != UP && prog_div->from.sym->thumb ? REGTMPT : REGTMP;
+			p->to.offset = 0;
+
+			/* CALL appropriate */
+			q = prg();
+			q->link = p->link;
+			p->link = q;
+			p = q;
+
+#ifdef CALLEEBX
+			p->as = ABL;
+#else
+			if(prog_div != UP && prog_div->from.sym->thumb)
+				p->as = thumb ? ABL : ABX;
+			else
+				p->as = thumb ? ABX : ABL;
+#endif
+			p->line = q1->line;
+			p->to.type = D_BRANCH;
+			p->cond = p;
+			switch(o) {
+			case ADIV:
+				p->cond = prog_div;
+				p->to.sym = sym_div;
+				break;
+			case ADIVU:
+				p->cond = prog_divu;
+				p->to.sym = sym_divu;
+				break;
+			case AMOD:
+				p->cond = prog_mod;
+				p->to.sym = sym_mod;
+				break;
+			case AMODU:
+				p->cond = prog_modu;
+				p->to.sym = sym_modu;
+				break;
+			}
+
+			/* MOV REGTMP, b */
+			q = prg();
+			q->link = p->link;
+			p->link = q;
+			p = q;
+
+			p->as = AMOVW;
+			p->line = q1->line;
+			p->from.type = D_REG;
+			p->from.reg = prog_div != UP && prog_div->from.sym->thumb ? REGTMPT : REGTMP;
+			p->from.offset = 0;
+			p->to.type = D_REG;
+			p->to.reg = q1->to.reg;
+
+			/* ADD $8,SP */
+			q = prg();
+			q->link = p->link;
+			p->link = q;
+			p = q;
+
+			p->as = AADD;
+			p->from.type = D_CONST;
+			p->from.reg = NREG;
+			p->from.offset = 8;
+			p->reg = NREG;
+			p->to.type = D_REG;
+			p->to.reg = REGSP;
+
+			/* SUB $8,SP */
+			q1->as = ASUB;
+			q1->from.type = D_CONST;
+			q1->from.offset = 8;
+			q1->from.reg = NREG;
+			q1->reg = NREG;
+			q1->to.type = D_REG;
+			q1->to.reg = REGSP;
+
+			break;
+		case AMOVW:
+			if(thumb){
+				Adr *a = &p->from;
+
+				if(a->type == D_CONST && ((a->name == D_NONE && a->reg == REGSP) || a->name == D_AUTO || a->name == D_PARAM) && (a->offset & 3))
+					diag("SP offset not multiple of 4");
+			}
+			break;
+		case AMOVB:
+		case AMOVBU:
+		case AMOVH:
+		case AMOVHU:
+			if(thumb){
+				if(p->from.type == D_OREG && (p->from.name == D_AUTO || p->from.name == D_PARAM || (p->from.name == D_CONST && p->from.reg == REGSP))){
+					q = prg();
+					*q = *p;
+					if(p->from.name == D_AUTO)
+						q->from.offset += autosize;
+					else if(p->from.name == D_PARAM)
+						q->from.offset += autosize+4;
+					q->from.name = D_NONE;
+					q->from.reg = REGTMPT;
+					p = movrr(p, REGSP, REGTMPT, p);
+					q->link = p->link;
+					p->link = q;
+				}
+				if(p->to.type == D_OREG && (p->to.name == D_AUTO || p->to.name == D_PARAM || (p->to.name == D_CONST && p->to.reg == REGSP))){
+					q = prg();
+					*q = *p;
+					if(p->to.name == D_AUTO)
+						q->to.offset += autosize;
+					else if(p->to.name == D_PARAM)
+						q->to.offset += autosize+4;
+					q->to.name = D_NONE;
+					q->to.reg = REGTMPT;
+					p = movrr(p, REGSP, REGTMPT, p);
+					q->link = p->link;
+					p->link = q;
+					if(q->to.offset < 0 || q->to.offset > 255){	// complicated
+						p->to.reg = REGTMPT+1;			// mov sp, r8
+						q1 = prg();
+						q1->line = p->line;
+						q1->as = AMOVW;
+						q1->from.type = D_CONST;
+						q1->from.offset = q->to.offset;
+						q1->to.type = D_REG;
+						q1->to.reg = REGTMPT;			// mov $o, r7
+						p->link = q1;
+						q1->link = q;
+						q1 = prg();
+						q1->line = p->line;
+						q1->as = AADD;
+						q1->from.type = D_REG;
+						q1->from.reg = REGTMPT+1;
+						q1->to.type = D_REG;
+						q1->to.reg = REGTMPT;			// add r8, r7
+						p->link->link = q1;
+						q1->link = q;
+						q->to.offset = 0;				// mov* r, 0(r7)
+						/* phew */
+					}
+				}
+			}
+			break;
+		case AMOVM:
+			if(thumb){
+				if(p->from.type == D_OREG){
+					if(p->from.offset == 0)
+						p->from.type = D_REG;
+					else
+						diag("non-zero AMOVM offset");
+				}
+				else if(p->to.type == D_OREG){
+					if(p->to.offset == 0)
+						p->to.type = D_REG;
+					else
+						diag("non-zero AMOVM offset");
+				}
+			}
+			break;
+		case AB:
+			if(thumb && p->to.type == D_OREG){
+				if(p->to.offset == 0){
+					p->as = AMOVW;
+					p->from.type = D_REG;
+					p->from.reg = p->to.reg;
+					p->to.type = D_REG;
+					p->to.reg = REGPC;
+				}
+				else{
+					p->as = AADD;
+					p->from.type = D_CONST;
+					p->from.offset = p->to.offset;
+					p->reg = p->to.reg;
+					p->to.type = D_REG;
+					p->to.reg = REGTMPT-1;
+					q = prg();
+					q->as = AMOVW;
+					q->line = p->line;
+					q->from.type = D_REG;
+					q->from.reg = REGTMPT-1;
+					q->to.type = D_REG;
+					q->to.reg = REGPC;
+					q->link = p->link;
+					p->link = q;
+				}
+			}
+			if(seenthumb && !thumb && p->to.type == D_OREG && p->to.reg == REGLINK){	
+				// print("warn %s:	b	(R%d)	assuming a return\n", curtext->from.sym->name, p->to.reg);
+				p->as = ABXRET;
+			}
+			break;
+		case ABL:
+		case ABX:
+			if(thumb && p->to.type == D_OREG){
+				if(p->to.offset == 0){
+					p->as = o;
+					p->from.type = D_NONE;
+					p->to.type = D_REG;
+				}
+				else{
+					p->as = AADD;
+					p->from.type = D_CONST;
+					p->from.offset = p->to.offset;
+					p->reg = p->to.reg;
+					p->to.type = D_REG;
+					p->to.reg = REGTMPT-1;
+					q = prg();
+					q->as = o;
+					q->line = p->line;
+					q->from.type = D_NONE;
+					q->to.type = D_REG;
+					q->to.reg = REGTMPT-1;
+					q->link = p->link;
+					p->link = q;
+				}
+			}
+			break;
+		}
+	}
+}
+
+static void
+sigdiv(char *n)
+{
+	Sym *s;
+
+	s = lookup(n, 0);
+	if(s->type == STEXT){
+		if(s->sig == 0)
+			s->sig = SIGNINTERN;
+	}
+	else if(s->type == 0 || s->type == SXREF)
+		s->type = SUNDEF;
+}
+
+void
+divsig(void)
+{
+	sigdiv("_div");
+	sigdiv("_divu");
+	sigdiv("_mod");
+	sigdiv("_modu");
+}
+
+static void
+sdiv(Sym *s)
+{
+	if(s->type == 0 || s->type == SXREF){
+		/* undefsym(s); */
+		s->type = SXREF;
+		if(s->sig == 0)
+			s->sig = SIGNINTERN;
+		s->subtype = SIMPORT;
+	}
+	else if(s->type != STEXT)
+		diag("undefined: %s", s->name);
+}
+
+void
+initdiv(void)
+{
+	Sym *s2, *s3, *s4, *s5;
+	Prog *p;
+
+	if(prog_div != P)
+		return;
+	sym_div = s2 = lookup("_div", 0);
+	sym_divu = s3 = lookup("_divu", 0);
+	sym_mod = s4 = lookup("_mod", 0);
+	sym_modu = s5 = lookup("_modu", 0);
+	if(dlm) {
+		sdiv(s2); if(s2->type == SXREF) prog_div = UP;
+		sdiv(s3); if(s3->type == SXREF) prog_divu = UP;
+		sdiv(s4); if(s4->type == SXREF) prog_mod = UP;
+		sdiv(s5); if(s5->type == SXREF) prog_modu = UP;
+	}
+	for(p = firstp; p != P; p = p->link)
+		if(p->as == ATEXT) {
+			if(p->from.sym == s2)
+				prog_div = p;
+			if(p->from.sym == s3)
+				prog_divu = p;
+			if(p->from.sym == s4)
+				prog_mod = p;
+			if(p->from.sym == s5)
+				prog_modu = p;
+		}
+	if(prog_div == P) {
+		diag("undefined: %s", s2->name);
+		prog_div = curtext;
+	}
+	if(prog_divu == P) {
+		diag("undefined: %s", s3->name);
+		prog_divu = curtext;
+	}
+	if(prog_mod == P) {
+		diag("undefined: %s", s4->name);
+		prog_mod = curtext;
+	}
+	if(prog_modu == P) {
+		diag("undefined: %s", s5->name);
+		prog_modu = curtext;
+	}
+}
+
+static void
+setdiv(int as)
+{
+	Prog *p = nil;
+
+	switch(as){
+	case ADIV: p = prog_div; break;
+	case ADIVU: p = prog_divu; break;
+	case AMOD: p = prog_mod; break;
+	case AMODU: p = prog_modu; break;
+	}
+	if(p != UP && thumb != p->from.sym->thumb)
+		p->from.sym->foreign = 1;
+}
+
+void
+nocache(Prog *p)
+{
+	p->optab = 0;
+	p->from.class = 0;
+	p->to.class = 0;
+}
diff --git a/sys/src/cmd/tl/obj.c b/sys/src/cmd/tl/obj.c
new file mode 100644
index 000000000..3c83c4b8b
--- /dev/null
+++ b/sys/src/cmd/tl/obj.c
@@ -0,0 +1,1558 @@
+#define	EXTERN
+#include	"l.h"
+#include	<ar.h>
+
+#ifndef	DEFAULT
+#define	DEFAULT	'9'
+#endif
+
+char	*noname		= "<none>";
+char	symname[]	= SYMDEF;
+char	thechar		= '5';
+char	*thestring 	= "arm";
+
+/*
+ *	-H1 -T0x10005000 -R4		is aif for risc os
+ *	-H2 -T4128 -R4096		is plan9 format
+ *	-H3 -T0xF0000020 -R4		is NetBSD format
+ *	-H4				is IXP1200 (raw)
+ *	-H5 -T0xC0008010 -R1024		is ipaq
+ */
+
+static int
+isobjfile(char *f)
+{
+	int n, v;
+	Biobuf *b;
+	char buf1[5], buf2[SARMAG];
+
+	b = Bopen(f, OREAD);
+	if(b == nil)
+		return 0;
+	n = Bread(b, buf1, 5);
+	if(n == 5 && (buf1[2] == 1 && buf1[3] == '<' || buf1[3] == 1 && buf1[4] == '<'))
+		v = 1;	/* good enough for our purposes */
+	else{
+		Bseek(b, 0, 0);
+		n = Bread(b, buf2, SARMAG);
+		v = n == SARMAG && strncmp(buf2, ARMAG, SARMAG) == 0;
+	}
+	Bterm(b);
+	return v;
+}
+
+void
+main(int argc, char *argv[])
+{
+	int c;
+	char *a;
+
+	Binit(&bso, 1, OWRITE);
+	srand(time(0));
+	cout = -1;
+	listinit();
+	outfile = 0;
+	nerrors = 0;
+	curtext = P;
+	HEADTYPE = -1;
+	INITTEXT = -1;
+	INITDAT = -1;
+	INITRND = -1;
+	INITENTRY = 0;
+
+	ARGBEGIN {
+	default:
+		c = ARGC();
+		if(c >= 0 && c < sizeof(debug))
+			debug[c]++;
+		break;
+	case 'o':
+		outfile = ARGF();
+		break;
+	case 'E':
+		a = ARGF();
+		if(a)
+			INITENTRY = a;
+		break;
+	case 'T':
+		a = ARGF();
+		if(a)
+			INITTEXT = atolwhex(a);
+		break;
+	case 'D':
+		a = ARGF();
+		if(a)
+			INITDAT = atolwhex(a);
+		break;
+	case 'R':
+		a = ARGF();
+		if(a)
+			INITRND = atolwhex(a);
+		break;
+	case 'H':
+		a = ARGF();
+		if(a)
+			HEADTYPE = atolwhex(a);
+		/* do something about setting INITTEXT */
+		break;
+	case 'x':	/* produce export table */
+		doexp = 1;
+		if(argv[1] != nil && argv[1][0] != '-' && !isobjfile(argv[1]))
+			readundefs(ARGF(), SEXPORT);
+		break;
+	case 'u':	/* produce dynamically loadable module */
+		dlm = 1;
+		debug['l']++;
+		if(argv[1] != nil && argv[1][0] != '-' && !isobjfile(argv[1]))
+			readundefs(ARGF(), SIMPORT);
+		break;
+	} ARGEND
+
+	USED(argc);
+
+	if(*argv == 0) {
+		diag("usage: 5l [-options] objects");
+		errorexit();
+	}
+	if(!debug['9'] && !debug['U'] && !debug['B'])
+		debug[DEFAULT] = 1;
+	if(HEADTYPE == -1) {
+		if(debug['U'])
+			HEADTYPE = 0;
+		if(debug['B'])
+			HEADTYPE = 1;
+		if(debug['9'])
+			HEADTYPE = 2;
+	}
+	switch(HEADTYPE) {
+	default:
+		diag("unknown -H option");
+		errorexit();
+	case 0:	/* no header */
+		HEADR = 0L;
+		if(INITTEXT == -1)
+			INITTEXT = 0;
+		if(INITDAT == -1)
+			INITDAT = 0;
+		if(INITRND == -1)
+			INITRND = 4;
+		break;
+	case 1:	/* aif for risc os */
+		HEADR = 128L;
+		if(INITTEXT == -1)
+			INITTEXT = 0x10005000 + HEADR;
+		if(INITDAT == -1)
+			INITDAT = 0;
+		if(INITRND == -1)
+			INITRND = 4;
+		break;
+	case 2:	/* plan 9 */
+		HEADR = 32L;
+		if(INITTEXT == -1)
+			INITTEXT = 4128;
+		if(INITDAT == -1)
+			INITDAT = 0;
+		if(INITRND == -1)
+			INITRND = 4096;
+		break;
+	case 3:	/* boot for NetBSD */
+		HEADR = 32L;
+		if(INITTEXT == -1)
+			INITTEXT = 0xF0000020L;
+		if(INITDAT == -1)
+			INITDAT = 0;
+		if(INITRND == -1)
+			INITRND = 4096;
+		break;
+	case 4: /* boot for IXP1200 */
+		HEADR = 0L;
+		if(INITTEXT == -1)
+			INITTEXT = 0x0;
+		if(INITDAT == -1)
+			INITDAT = 0;
+		if(INITRND == -1)
+			INITRND = 4;
+		break;
+	case 5: /* boot for ipaq */
+		HEADR = 16L;
+		if(INITTEXT == -1)
+			INITTEXT = 0xC0008010;
+		if(INITDAT == -1)
+			INITDAT = 0;
+		if(INITRND == -1)
+			INITRND = 1024;
+		break;
+	}
+	if(INITDAT != 0 && INITRND != 0)
+		print("warning: -D0x%lux is ignored because of -R0x%lux\n",
+			INITDAT, INITRND);
+	if(debug['v'])
+		Bprint(&bso, "HEADER = -H0x%d -T0x%lux -D0x%lux -R0x%lux\n",
+			HEADTYPE, INITTEXT, INITDAT, INITRND);
+	Bflush(&bso);
+	zprg.as = AGOK;
+	zprg.scond = 14;
+	zprg.reg = NREG;
+	zprg.from.name = D_NONE;
+	zprg.from.type = D_NONE;
+	zprg.from.reg = NREG;
+	zprg.to = zprg.from;
+	buildop();
+	thumbbuildop();	// could build on demand
+	histgen = 0;
+	textp = P;
+	datap = P;
+	pc = 0;
+	dtype = 4;
+	if(outfile == 0)
+		outfile = "5.out";
+	cout = create(outfile, 1, 0775);
+	if(cout < 0) {
+		diag("%s: cannot create", outfile);
+		errorexit();
+	}
+	nuxiinit();
+
+	version = 0;
+	cbp = buf.cbuf;
+	cbc = sizeof(buf.cbuf);
+	firstp = prg();
+	lastp = firstp;
+
+	if(INITENTRY == 0) {
+		INITENTRY = "_main";
+		if(debug['p'])
+			INITENTRY = "_mainp";
+		if(!debug['l'])
+			lookup(INITENTRY, 0)->type = SXREF;
+	} else
+		lookup(INITENTRY, 0)->type = SXREF;
+
+	while(*argv)
+		objfile(*argv++);
+	if(!debug['l'])
+		loadlib();
+	firstp = firstp->link;
+	if(firstp == P)
+		goto out;
+	if(doexp || dlm){
+		EXPTAB = "_exporttab";
+		zerosig(EXPTAB);
+		zerosig("etext");
+		zerosig("edata");
+		zerosig("end");
+		if(dlm){
+			initdiv();
+			import();
+			HEADTYPE = 2;
+			INITTEXT = INITDAT = 0;
+			INITRND = 8;
+			INITENTRY = EXPTAB;
+		}
+		else
+			divsig();
+		export();
+	}
+	patch();
+	if(debug['p'])
+		if(debug['1'])
+			doprof1();
+		else
+			doprof2();
+	if(debug['u'])
+		reachable();
+	dodata();
+	if(seenthumb && debug['f'])
+		fnptrs();
+	follow();
+	if(firstp == P)
+		goto out;
+	noops();
+	span();
+	asmb();
+	undef();
+
+out:
+	if(debug['c']){
+		thumbcount();
+		print("ARM size = %d\n", armsize);
+	}
+	if(debug['v']) {
+		Bprint(&bso, "%5.2f cpu time\n", cputime());
+		Bprint(&bso, "%ld memory used\n", thunk);
+		Bprint(&bso, "%d sizeof adr\n", sizeof(Adr));
+		Bprint(&bso, "%d sizeof prog\n", sizeof(Prog));
+	}
+	Bflush(&bso);
+	errorexit();
+}
+
+void
+loadlib(void)
+{
+	int i;
+	long h;
+	Sym *s;
+
+loop:
+	xrefresolv = 0;
+	for(i=0; i<libraryp; i++) {
+		if(debug['v'])
+			Bprint(&bso, "%5.2f autolib: %s (from %s)\n", cputime(), library[i], libraryobj[i]);
+		objfile(library[i]);
+	}
+	if(xrefresolv)
+	for(h=0; h<nelem(hash); h++)
+	for(s = hash[h]; s != S; s = s->link)
+		if(s->type == SXREF)
+			goto loop;
+}
+
+void
+errorexit(void)
+{
+
+	Bflush(&bso);
+	if(nerrors) {
+		if(cout >= 0)
+			remove(outfile);
+		exits("error");
+	}
+	exits(0);
+}
+
+void
+objfile(char *file)
+{
+	long off, esym, cnt, l;
+	int f, work;
+	Sym *s;
+	char magbuf[SARMAG];
+	char name[100], pname[150];
+	struct ar_hdr arhdr;
+	char *e, *start, *stop;
+
+	if(file[0] == '-' && file[1] == 'l') {
+		if(debug['9'])
+			sprint(name, "/%s/lib/lib", thestring);
+		else
+			sprint(name, "/usr/%clib/lib", thechar);
+		strcat(name, file+2);
+		strcat(name, ".a");
+		file = name;
+	}
+	if(debug['v'])
+		Bprint(&bso, "%5.2f ldobj: %s\n", cputime(), file);
+	Bflush(&bso);
+	f = open(file, 0);
+	if(f < 0) {
+		diag("cannot open file: %s", file);
+		errorexit();
+	}
+	l = read(f, magbuf, SARMAG);
+	if(l != SARMAG || strncmp(magbuf, ARMAG, SARMAG)){
+		/* load it as a regular file */
+		l = seek(f, 0L, 2);
+		seek(f, 0L, 0);
+		ldobj(f, l, file);
+		close(f);
+		return;
+	}
+
+	if(debug['v'])
+		Bprint(&bso, "%5.2f ldlib: %s\n", cputime(), file);
+	l = read(f, &arhdr, SAR_HDR);
+	if(l != SAR_HDR) {
+		diag("%s: short read on archive file symbol header", file);
+		goto out;
+	}
+	if(strncmp(arhdr.name, symname, strlen(symname))) {
+		diag("%s: first entry not symbol header", file);
+		goto out;
+	}
+
+	esym = SARMAG + SAR_HDR + atolwhex(arhdr.size);
+	off = SARMAG + SAR_HDR;
+
+	/*
+	 * just bang the whole symbol file into memory
+	 */
+	seek(f, off, 0);
+	cnt = esym - off;
+	start = malloc(cnt + 10);
+	cnt = read(f, start, cnt);
+	if(cnt <= 0){
+		close(f);
+		return;
+	}
+	stop = &start[cnt];
+	memset(stop, 0, 10);
+
+	work = 1;
+	while(work){
+		if(debug['v'])
+			Bprint(&bso, "%5.2f library pass: %s\n", cputime(), file);
+		Bflush(&bso);
+		work = 0;
+		for(e = start; e < stop; e = strchr(e+5, 0) + 1) {
+			s = lookup(e+5, 0);
+			if(s->type != SXREF)
+				continue;
+			sprint(pname, "%s(%s)", file, s->name);
+			if(debug['v'])
+				Bprint(&bso, "%5.2f library: %s\n", cputime(), pname);
+			Bflush(&bso);
+			l = e[1] & 0xff;
+			l |= (e[2] & 0xff) << 8;
+			l |= (e[3] & 0xff) << 16;
+			l |= (e[4] & 0xff) << 24;
+			seek(f, l, 0);
+			l = read(f, &arhdr, SAR_HDR);
+			if(l != SAR_HDR)
+				goto bad;
+			if(strncmp(arhdr.fmag, ARFMAG, sizeof(arhdr.fmag)))
+				goto bad;
+			l = atolwhex(arhdr.size);
+			ldobj(f, l, pname);
+			if(s->type == SXREF) {
+				diag("%s: failed to load: %s", file, s->name);
+				errorexit();
+			}
+			work = 1;
+			xrefresolv = 1;
+		}
+	}
+	return;
+
+bad:
+	diag("%s: bad or out of date archive", file);
+out:
+	close(f);
+}
+
+int
+zaddr(uchar *p, Adr *a, Sym *h[])
+{
+	int i, c;
+	long l;
+	Sym *s;
+	Auto *u;
+
+	c = p[2];
+	if(c < 0 || c > NSYM){
+		print("sym out of range: %d\n", c);
+		p[0] = ALAST+1;
+		return 0;
+	}
+	a->type = p[0];
+	a->reg = p[1];
+	a->sym = h[c];
+	a->name = p[3];
+	c = 4;
+
+	if(a->reg < 0 || a->reg > NREG) {
+		print("register out of range %d\n", a->reg);
+		p[0] = ALAST+1;
+		return 0;	/*  force real diagnostic */
+	}
+
+	if(a->type == D_CONST || a->type == D_OCONST) {
+		if(a->name == D_EXTERN || a->name == D_STATIC) {
+			s = a->sym;
+			if(s != S && (s->type == STEXT || s->type == SLEAF || s->type == SCONST || s->type == SXREF)) {
+				if(0 && !s->fnptr && s->name[0] != '.')
+					print("%s used as function pointer\n", s->name);
+				s->fnptr = 1;	// over the top cos of SXREF
+			}
+		}
+	}
+
+	switch(a->type) {
+	default:
+		print("unknown type %d\n", a->type);
+		p[0] = ALAST+1;
+		return 0;	/*  force real diagnostic */
+
+	case D_NONE:
+	case D_REG:
+	case D_FREG:
+	case D_PSR:
+	case D_FPCR:
+		break;
+
+	case D_REGREG:
+		a->offset = p[4];
+		c++;
+		break;
+
+	case D_BRANCH:
+	case D_OREG:
+	case D_CONST:
+	case D_OCONST:
+	case D_SHIFT:
+		a->offset = p[4] | (p[5]<<8) |
+			(p[6]<<16) | (p[7]<<24);
+		c += 4;
+		break;
+
+	case D_SCONST:
+		while(nhunk < NSNAME)
+			gethunk();
+		a->sval = (char*)hunk;
+		nhunk -= NSNAME;
+		hunk += NSNAME;
+
+		memmove(a->sval, p+4, NSNAME);
+		c += NSNAME;
+		break;
+
+	case D_FCONST:
+		while(nhunk < sizeof(Ieee))
+			gethunk();
+		a->ieee = (Ieee*)hunk;
+		nhunk -= NSNAME;
+		hunk += NSNAME;
+
+		a->ieee->l = p[4] | (p[5]<<8) |
+			(p[6]<<16) | (p[7]<<24);
+		a->ieee->h = p[8] | (p[9]<<8) |
+			(p[10]<<16) | (p[11]<<24);
+		c += 8;
+		break;
+	}
+	s = a->sym;
+	if(s == S)
+		return c;
+	i = a->name;
+	if(i != D_AUTO && i != D_PARAM)
+		return c;
+
+	l = a->offset;
+	for(u=curauto; u; u=u->link)
+		if(u->asym == s)
+		if(u->type == i) {
+			if(u->aoffset > l)
+				u->aoffset = l;
+			return c;
+		}
+
+	while(nhunk < sizeof(Auto))
+		gethunk();
+	u = (Auto*)hunk;
+	nhunk -= sizeof(Auto);
+	hunk += sizeof(Auto);
+
+	u->link = curauto;
+	curauto = u;
+	u->asym = s;
+	u->aoffset = l;
+	u->type = i;
+	return c;
+}
+
+void
+addlib(char *obj)
+{
+	char name[1024], comp[256], *p;
+	int i;
+
+	if(histfrogp <= 0)
+		return;
+
+	if(histfrog[0]->name[1] == '/') {
+		sprint(name, "");
+		i = 1;
+	} else
+	if(histfrog[0]->name[1] == '.') {
+		sprint(name, ".");
+		i = 0;
+	} else {
+		if(debug['9'])
+			sprint(name, "/%s/lib", thestring);
+		else
+			sprint(name, "/usr/%clib", thechar);
+		i = 0;
+	}
+
+	for(; i<histfrogp; i++) {
+		snprint(comp, sizeof comp, histfrog[i]->name+1);
+		for(;;) {
+			p = strstr(comp, "$O");
+			if(p == 0)
+				break;
+			memmove(p+1, p+2, strlen(p+2)+1);
+			p[0] = thechar;
+		}
+		for(;;) {
+			p = strstr(comp, "$M");
+			if(p == 0)
+				break;
+			if(strlen(comp)+strlen(thestring)-2+1 >= sizeof comp) {
+				diag("library component too long");
+				return;
+			}
+			memmove(p+strlen(thestring), p+2, strlen(p+2)+1);
+			memmove(p, thestring, strlen(thestring));
+		}
+		if(strlen(name) + strlen(comp) + 3 >= sizeof(name)) {
+			diag("library component too long");
+			return;
+		}
+		strcat(name, "/");
+		strcat(name, comp);
+	}
+	for(i=0; i<libraryp; i++)
+		if(strcmp(name, library[i]) == 0)
+			return;
+	if(libraryp == nelem(library)){
+		diag("too many autolibs; skipping %s", name);
+		return;
+	}
+
+	p = malloc(strlen(name) + 1);
+	strcpy(p, name);
+	library[libraryp] = p;
+	p = malloc(strlen(obj) + 1);
+	strcpy(p, obj);
+	libraryobj[libraryp] = p;
+	libraryp++;
+}
+
+void
+addhist(long line, int type)
+{
+	Auto *u;
+	Sym *s;
+	int i, j, k;
+
+	u = malloc(sizeof(Auto));
+	s = malloc(sizeof(Sym));
+	s->name = malloc(2*(histfrogp+1) + 1);
+
+	u->asym = s;
+	u->type = type;
+	u->aoffset = line;
+	u->link = curhist;
+	curhist = u;
+
+	j = 1;
+	for(i=0; i<histfrogp; i++) {
+		k = histfrog[i]->value;
+		s->name[j+0] = k>>8;
+		s->name[j+1] = k;
+		j += 2;
+	}
+}
+
+void
+histtoauto(void)
+{
+	Auto *l;
+
+	while(l = curhist) {
+		curhist = l->link;
+		l->link = curauto;
+		curauto = l;
+	}
+}
+
+void
+collapsefrog(Sym *s)
+{
+	int i;
+
+	/*
+	 * bad encoding of path components only allows
+	 * MAXHIST components. if there is an overflow,
+	 * first try to collapse xxx/..
+	 */
+	for(i=1; i<histfrogp; i++)
+		if(strcmp(histfrog[i]->name+1, "..") == 0) {
+			memmove(histfrog+i-1, histfrog+i+1,
+				(histfrogp-i-1)*sizeof(histfrog[0]));
+			histfrogp--;
+			goto out;
+		}
+
+	/*
+	 * next try to collapse .
+	 */
+	for(i=0; i<histfrogp; i++)
+		if(strcmp(histfrog[i]->name+1, ".") == 0) {
+			memmove(histfrog+i, histfrog+i+1,
+				(histfrogp-i-1)*sizeof(histfrog[0]));
+			goto out;
+		}
+
+	/*
+	 * last chance, just truncate from front
+	 */
+	memmove(histfrog+0, histfrog+1,
+		(histfrogp-1)*sizeof(histfrog[0]));
+
+out:
+	histfrog[histfrogp-1] = s;
+}
+
+void
+nopout(Prog *p)
+{
+	p->as = ANOP;
+	p->from.type = D_NONE;
+	p->to.type = D_NONE;
+}
+
+uchar*
+readsome(int f, uchar *buf, uchar *good, uchar *stop, int max)
+{
+	int n;
+
+	n = stop - good;
+	memmove(buf, good, stop - good);
+	stop = buf + n;
+	n = MAXIO - n;
+	if(n > max)
+		n = max;
+	n = read(f, stop, n);
+	if(n <= 0)
+		return 0;
+	return stop + n;
+}
+
+static void puntfp(Prog *);
+
+void
+ldobj(int f, long c, char *pn)
+{
+	long ipc;
+	Prog *p, *t;
+	uchar *bloc, *bsize, *stop;
+	Sym *h[NSYM], *s, *di;
+	int v, o, r, skip;
+	ulong sig;
+	static int files;
+	static char **filen;
+	char **nfilen;
+
+	if((files&15) == 0){
+		nfilen = malloc((files+16)*sizeof(char*));
+		memmove(nfilen, filen, files*sizeof(char*));
+		free(filen);
+		filen = nfilen;
+	}
+	filen[files++] = strdup(pn);
+
+	bsize = buf.xbuf;
+	bloc = buf.xbuf;
+	di = S;
+
+newloop:
+	memset(h, 0, sizeof(h));
+	version++;
+	histfrogp = 0;
+	ipc = pc;
+	skip = 0;
+
+loop:
+	if(c <= 0)
+		goto eof;
+	r = bsize - bloc;
+	if(r < 100 && r < c) {		/* enough for largest prog */
+		bsize = readsome(f, buf.xbuf, bloc, bsize, c);
+		if(bsize == 0)
+			goto eof;
+		bloc = buf.xbuf;
+		goto loop;
+	}
+	o = bloc[0];		/* as */
+	if(o <= AXXX || o >= ALAST) {
+		diag("%s: line %ld: opcode out of range %d", pn, pc-ipc, o);
+		print("	probably not a .5 file\n");
+		errorexit();
+	}
+	if(o == ANAME || o == ASIGNAME) {
+		sig = 0;
+		if(o == ASIGNAME){
+			sig = bloc[1] | (bloc[2]<<8) | (bloc[3]<<16) | (bloc[4]<<24);
+			bloc += 4;
+			c -= 4;
+		}
+		stop = memchr(&bloc[3], 0, bsize-&bloc[3]);
+		if(stop == 0){
+			bsize = readsome(f, buf.xbuf, bloc, bsize, c);
+			if(bsize == 0)
+				goto eof;
+			bloc = buf.xbuf;
+			stop = memchr(&bloc[3], 0, bsize-&bloc[3]);
+			if(stop == 0){
+				fprint(2, "%s: name too long\n", pn);
+				errorexit();
+			}
+		}
+		v = bloc[1];	/* type */
+		o = bloc[2];	/* sym */
+		bloc += 3;
+		c -= 3;
+
+		r = 0;
+		if(v == D_STATIC)
+			r = version;
+		s = lookup((char*)bloc, r);
+		c -= &stop[1] - bloc;
+		bloc = stop + 1;
+
+		if(sig != 0){
+			if(s->sig != 0 && s->sig != sig)
+				diag("incompatible type signatures %lux(%s) and %lux(%s) for %s", s->sig, filen[s->file], sig, pn, s->name);
+			s->sig = sig;
+			s->file = files-1;
+		}
+
+		if(debug['W'])
+			print("	ANAME	%s\n", s->name);
+		h[o] = s;
+		if((v == D_EXTERN || v == D_STATIC) && s->type == 0)
+			s->type = SXREF;
+		if(v == D_FILE) {
+			if(s->type != SFILE) {
+				histgen++;
+				s->type = SFILE;
+				s->value = histgen;
+			}
+			if(histfrogp < MAXHIST) {
+				histfrog[histfrogp] = s;
+				histfrogp++;
+			} else
+				collapsefrog(s);
+		}
+		goto loop;
+	}
+
+	if(nhunk < sizeof(Prog))
+		gethunk();
+	p = (Prog*)hunk;
+	nhunk -= sizeof(Prog);
+	hunk += sizeof(Prog);
+
+	p->as = o;
+	p->scond = bloc[1];
+	p->reg = bloc[2];
+	p->line = bloc[3] | (bloc[4]<<8) | (bloc[5]<<16) | (bloc[6]<<24);
+
+	r = zaddr(bloc+7, &p->from, h) + 7;
+	r += zaddr(bloc+r, &p->to, h);
+	bloc += r;
+	c -= r;
+
+	if(p->reg > NREG)
+		diag("register out of range %d", p->reg);
+
+	p->link = P;
+	p->cond = P;
+
+	if(debug['W'])
+		print("%P\n", p);
+
+	switch(o) {
+	case AHISTORY:
+		if(p->to.offset == -1) {
+			addlib(pn);
+			histfrogp = 0;
+			goto loop;
+		}
+		addhist(p->line, D_FILE);		/* 'z' */
+		if(p->to.offset)
+			addhist(p->to.offset, D_FILE1);	/* 'Z' */
+		histfrogp = 0;
+		goto loop;
+
+	case AEND:
+		histtoauto();
+		if(curtext != P)
+			curtext->to.autom = curauto;
+		curauto = 0;
+		curtext = P;
+		if(c)
+			goto newloop;
+		return;
+
+	case AGLOBL:
+		s = p->from.sym;
+		if(s == S) {
+			diag("GLOBL must have a name\n%P", p);
+			errorexit();
+		}
+		if(s->type == 0 || s->type == SXREF) {
+			s->type = SBSS;
+			s->value = 0;
+		}
+		if(s->type != SBSS) {
+			diag("redefinition: %s\n%P", s->name, p);
+			s->type = SBSS;
+			s->value = 0;
+		}
+		if(p->to.offset > s->value)
+			s->value = p->to.offset;
+		break;
+
+	case ADYNT:
+		if(p->to.sym == S) {
+			diag("DYNT without a sym\n%P", p);
+			break;
+		}
+		di = p->to.sym;
+		p->reg = 4;
+		if(di->type == SXREF) {
+			if(debug['z'])
+				Bprint(&bso, "%P set to %d\n", p, dtype);
+			di->type = SCONST;
+			di->value = dtype;
+			dtype += 4;
+		}
+		if(p->from.sym == S)
+			break;
+
+		p->from.offset = di->value;
+		p->from.sym->type = SDATA;
+		if(curtext == P) {
+			diag("DYNT not in text: %P", p);
+			break;
+		}
+		p->to.sym = curtext->from.sym;
+		p->to.type = D_CONST;
+		p->link = datap;
+		datap = p;
+		break;
+
+	case AINIT:
+		if(p->from.sym == S) {
+			diag("INIT without a sym\n%P", p);
+			break;
+		}
+		if(di == S) {
+			diag("INIT without previous DYNT\n%P", p);
+			break;
+		}
+		p->from.offset = di->value;
+		p->from.sym->type = SDATA;
+		p->link = datap;
+		datap = p;
+		break;
+	
+	case ADATA:
+		if(p->from.sym == S) {
+			diag("DATA without a sym\n%P", p);
+			break;
+		}
+		p->link = datap;
+		datap = p;
+		break;
+
+	case AGOK:
+		diag("unknown opcode\n%P", p);
+		p->pc = pc;
+		pc++;
+		break;
+
+	case ATEXT:
+		setarch(p);
+		setthumb(p);
+		p->align = 4;
+		if(curtext != P) {
+			histtoauto();
+			curtext->to.autom = curauto;
+			curauto = 0;
+		}
+		skip = 0;
+		curtext = p;
+		autosize = (p->to.offset+3L) & ~3L;
+		p->to.offset = autosize;
+		autosize += 4;
+		s = p->from.sym;
+		if(s == S) {
+			diag("TEXT must have a name\n%P", p);
+			errorexit();
+		}
+		if(s->type != 0 && s->type != SXREF) {
+			if(p->reg & DUPOK) {
+				skip = 1;
+				goto casedef;
+			}
+			diag("redefinition: %s\n%P", s->name, p);
+		}
+		s->type = STEXT;
+		s->value = pc;
+		s->thumb = thumb;
+		lastp->link = p;
+		lastp = p;
+		p->pc = pc;
+		pc++;
+		if(textp == P) {
+			textp = p;
+			etextp = p;
+			goto loop;
+		}
+		etextp->cond = p;
+		etextp = p;
+		break;
+
+	case ASUB:
+		if(p->from.type == D_CONST)
+		if(p->from.name == D_NONE)
+		if(p->from.offset < 0) {
+			p->from.offset = -p->from.offset;
+			p->as = AADD;
+		}
+		goto casedef;
+
+	case AADD:
+		if(p->from.type == D_CONST)
+		if(p->from.name == D_NONE)
+		if(p->from.offset < 0) {
+			p->from.offset = -p->from.offset;
+			p->as = ASUB;
+		}
+		goto casedef;
+
+	case AMOVWD:
+	case AMOVWF:
+	case AMOVDW:
+	case AMOVFW:
+	case AMOVFD:
+	case AMOVDF:
+	// case AMOVF:
+	// case AMOVD:
+	case ACMPF:
+	case ACMPD:
+	case AADDF:
+	case AADDD:
+	case ASUBF:
+	case ASUBD:
+	case AMULF:
+	case AMULD:
+	case ADIVF:
+	case ADIVD:
+		if(thumb)
+			puntfp(p);
+		goto casedef;
+
+	case AMOVF:
+		if(thumb)
+			puntfp(p);
+		if(skip)
+			goto casedef;
+
+		if(p->from.type == D_FCONST && chipfloat(p->from.ieee) < 0) {
+			/* size sb 9 max */
+			sprint(literal, "$%lux", ieeedtof(p->from.ieee));
+			s = lookup(literal, 0);
+			if(s->type == 0) {
+				s->type = SBSS;
+				s->value = 4;
+				t = prg();
+				t->as = ADATA;
+				t->line = p->line;
+				t->from.type = D_OREG;
+				t->from.sym = s;
+				t->from.name = D_EXTERN;
+				t->reg = 4;
+				t->to = p->from;
+				t->link = datap;
+				datap = t;
+			}
+			p->from.type = D_OREG;
+			p->from.sym = s;
+			p->from.name = D_EXTERN;
+			p->from.offset = 0;
+		}
+		goto casedef;
+
+	case AMOVD:
+		if(thumb)
+			puntfp(p);
+		if(skip)
+			goto casedef;
+
+		if(p->from.type == D_FCONST && chipfloat(p->from.ieee) < 0) {
+			/* size sb 18 max */
+			sprint(literal, "$%lux.%lux",
+				p->from.ieee->l, p->from.ieee->h);
+			s = lookup(literal, 0);
+			if(s->type == 0) {
+				s->type = SBSS;
+				s->value = 8;
+				t = prg();
+				t->as = ADATA;
+				t->line = p->line;
+				t->from.type = D_OREG;
+				t->from.sym = s;
+				t->from.name = D_EXTERN;
+				t->reg = 8;
+				t->to = p->from;
+				t->link = datap;
+				datap = t;
+			}
+			p->from.type = D_OREG;
+			p->from.sym = s;
+			p->from.name = D_EXTERN;
+			p->from.offset = 0;
+		}
+		goto casedef;
+
+	default:
+	casedef:
+		if(skip)
+			nopout(p);
+
+		if(p->to.type == D_BRANCH)
+			p->to.offset += ipc;
+		lastp->link = p;
+		lastp = p;
+		p->pc = pc;
+		pc++;
+		break;
+	}
+	goto loop;
+
+eof:
+	diag("truncated object file: %s", pn);
+}
+
+Sym*
+lookup(char *symb, int v)
+{
+	Sym *s;
+	char *p;
+	long h;
+	int c, l;
+
+	h = v;
+	for(p=symb; c = *p; p++)
+		h = h+h+h + c;
+	l = (p - symb) + 1;
+	if(h < 0)
+		h = ~h;
+	h %= NHASH;
+	for(s = hash[h]; s != S; s = s->link)
+		if(s->version == v)
+		if(memcmp(s->name, symb, l) == 0)
+			return s;
+
+	while(nhunk < sizeof(Sym))
+		gethunk();
+	s = (Sym*)hunk;
+	nhunk -= sizeof(Sym);
+	hunk += sizeof(Sym);
+
+	s->name = malloc(l);
+	memmove(s->name, symb, l);
+
+	s->link = hash[h];
+	s->type = 0;
+	s->version = v;
+	s->value = 0;
+	s->sig = 0;
+	s->used = s->thumb = s->foreign = s->fnptr = 0;
+	s->use = nil;
+	hash[h] = s;
+	return s;
+}
+
+Prog*
+prg(void)
+{
+	Prog *p;
+
+	while(nhunk < sizeof(Prog))
+		gethunk();
+	p = (Prog*)hunk;
+	nhunk -= sizeof(Prog);
+	hunk += sizeof(Prog);
+
+	*p = zprg;
+	return p;
+}
+
+void
+gethunk(void)
+{
+	char *h;
+	long nh;
+
+	nh = NHUNK;
+	if(thunk >= 5L*NHUNK) {
+		nh = 5L*NHUNK;
+		if(thunk >= 25L*NHUNK)
+			nh = 25L*NHUNK;
+	}
+	h = malloc(nh);
+	if(h == (char*)-1) {
+		diag("out of memory");
+		errorexit();
+	}
+	hunk = h;
+	nhunk = nh;
+	thunk += nh;
+}
+
+void
+doprof1(void)
+{
+	Sym *s;
+	long n;
+	Prog *p, *q;
+
+	if(debug['v'])
+		Bprint(&bso, "%5.2f profile 1\n", cputime());
+	Bflush(&bso);
+	s = lookup("__mcount", 0);
+	n = 1;
+	for(p = firstp->link; p != P; p = p->link) {
+		setarch(p);
+		if(p->as == ATEXT) {
+			q = prg();
+			q->line = p->line;
+			q->link = datap;
+			datap = q;
+			q->as = ADATA;
+			q->from.type = D_OREG;
+			q->from.name = D_EXTERN;
+			q->from.offset = n*4;
+			q->from.sym = s;
+			q->reg = 4;
+			q->to = p->from;
+			q->to.type = D_CONST;
+
+			q = prg();
+			q->line = p->line;
+			q->pc = p->pc;
+			q->link = p->link;
+			p->link = q;
+			p = q;
+			p->as = AMOVW;
+			p->from.type = D_OREG;
+			p->from.name = D_EXTERN;
+			p->from.sym = s;
+			p->from.offset = n*4 + 4;
+			p->to.type = D_REG;
+			p->to.reg = thumb ? REGTMPT : REGTMP;
+
+			q = prg();
+			q->line = p->line;
+			q->pc = p->pc;
+			q->link = p->link;
+			p->link = q;
+			p = q;
+			p->as = AADD;
+			p->from.type = D_CONST;
+			p->from.offset = 1;
+			p->to.type = D_REG;
+			p->to.reg = thumb ? REGTMPT : REGTMP;
+
+			q = prg();
+			q->line = p->line;
+			q->pc = p->pc;
+			q->link = p->link;
+			p->link = q;
+			p = q;
+			p->as = AMOVW;
+			p->from.type = D_REG;
+			p->from.reg = thumb ? REGTMPT : REGTMP;
+			p->to.type = D_OREG;
+			p->to.name = D_EXTERN;
+			p->to.sym = s;
+			p->to.offset = n*4 + 4;
+
+			n += 2;
+			continue;
+		}
+	}
+	q = prg();
+	q->line = 0;
+	q->link = datap;
+	datap = q;
+
+	q->as = ADATA;
+	q->from.type = D_OREG;
+	q->from.name = D_EXTERN;
+	q->from.sym = s;
+	q->reg = 4;
+	q->to.type = D_CONST;
+	q->to.offset = n;
+
+	s->type = SBSS;
+	s->value = n*4;
+}
+
+void
+doprof2(void)
+{
+	Sym *s2, *s4;
+	Prog *p, *q, *ps2, *ps4;
+
+	if(debug['v'])
+		Bprint(&bso, "%5.2f profile 2\n", cputime());
+	Bflush(&bso);
+	s2 = lookup("_profin", 0);
+	s4 = lookup("_profout", 0);
+	if(s2->type != STEXT || s4->type != STEXT) {
+		diag("_profin/_profout not defined");
+		return;
+	}
+	ps2 = P;
+	ps4 = P;
+	for(p = firstp; p != P; p = p->link) {
+		setarch(p);
+		if(p->as == ATEXT) {
+			if(p->from.sym == s2) {
+				ps2 = p;
+				p->reg = 1;
+			}
+			if(p->from.sym == s4) {
+				ps4 = p;
+				p->reg = 1;
+			}
+		}
+	}
+	for(p = firstp; p != P; p = p->link) {
+		setarch(p);
+		if(p->as == ATEXT) {
+			if(p->reg & NOPROF) {
+				for(;;) {
+					q = p->link;
+					if(q == P)
+						break;
+					if(q->as == ATEXT)
+						break;
+					p = q;
+				}
+				continue;
+			}
+
+			/*
+			 * BL	profin, R2
+			 */
+			q = prg();
+			q->line = p->line;
+			q->pc = p->pc;
+			q->link = p->link;
+			p->link = q;
+			p = q;
+			p->as = ABL;
+			p->to.type = D_BRANCH;
+			p->cond = ps2;
+			p->to.sym = s2;
+
+			continue;
+		}
+		if(p->as == ARET) {
+			/*
+			 * RET
+			 */
+			q = prg();
+			q->as = ARET;
+			q->from = p->from;
+			q->to = p->to;
+			q->link = p->link;
+			p->link = q;
+
+			/*
+			 * BL	profout
+			 */
+			p->as = ABL;
+			p->from = zprg.from;
+			p->to = zprg.to;
+			p->to.type = D_BRANCH;
+			p->cond = ps4;
+			p->to.sym = s4;
+
+			p = q;
+
+			continue;
+		}
+	}
+}
+
+void
+nuxiinit(void)
+{
+
+	int i, c;
+
+	for(i=0; i<4; i++) {
+		c = find1(0x04030201L, i+1);
+		if(i < 2)
+			inuxi2[i] = c;
+		if(i < 1)
+			inuxi1[i] = c;
+		inuxi4[i] = c;
+		fnuxi4[i] = c;
+		if(!debug['d']){
+			fnuxi8[i] = c;
+			fnuxi8[i+4] = c+4;
+		}
+		else{
+			fnuxi8[i] = c+4;		/* ms word first, then ls, even in little endian mode */
+			fnuxi8[i+4] = c;
+		}
+	}
+	if(debug['v']) {
+		Bprint(&bso, "inuxi = ");
+		for(i=0; i<1; i++)
+			Bprint(&bso, "%d", inuxi1[i]);
+		Bprint(&bso, " ");
+		for(i=0; i<2; i++)
+			Bprint(&bso, "%d", inuxi2[i]);
+		Bprint(&bso, " ");
+		for(i=0; i<4; i++)
+			Bprint(&bso, "%d", inuxi4[i]);
+		Bprint(&bso, "\nfnuxi = ");
+		for(i=0; i<4; i++)
+			Bprint(&bso, "%d", fnuxi4[i]);
+		Bprint(&bso, " ");
+		for(i=0; i<8; i++)
+			Bprint(&bso, "%d", fnuxi8[i]);
+		Bprint(&bso, "\n");
+	}
+	Bflush(&bso);
+}
+
+int
+find1(long l, int c)
+{
+	char *p;
+	int i;
+
+	p = (char*)&l;
+	for(i=0; i<4; i++)
+		if(*p++ == c)
+			return i;
+	return 0;
+}
+
+long
+ieeedtof(Ieee *ieeep)
+{
+	int exp;
+	long v;
+
+	if(ieeep->h == 0)
+		return 0;
+	exp = (ieeep->h>>20) & ((1L<<11)-1L);
+	exp -= (1L<<10) - 2L;
+	v = (ieeep->h & 0xfffffL) << 3;
+	v |= (ieeep->l >> 29) & 0x7L;
+	if((ieeep->l >> 28) & 1) {
+		v++;
+		if(v & 0x800000L) {
+			v = (v & 0x7fffffL) >> 1;
+			exp++;
+		}
+	}
+	if(exp <= -126 || exp >= 130)
+		diag("double fp to single fp overflow");
+	v |= ((exp + 126) & 0xffL) << 23;
+	v |= ieeep->h & 0x80000000L;
+	return v;
+}
+
+double
+ieeedtod(Ieee *ieeep)
+{
+	Ieee e;
+	double fr;
+	int exp;
+
+	if(ieeep->h & (1L<<31)) {
+		e.h = ieeep->h & ~(1L<<31);
+		e.l = ieeep->l;
+		return -ieeedtod(&e);
+	}
+	if(ieeep->l == 0 && ieeep->h == 0)
+		return 0;
+	fr = ieeep->l & ((1L<<16)-1L);
+	fr /= 1L<<16;
+	fr += (ieeep->l>>16) & ((1L<<16)-1L);
+	fr /= 1L<<16;
+	fr += (ieeep->h & (1L<<20)-1L) | (1L<<20);
+	fr /= 1L<<21;
+	exp = (ieeep->h>>20) & ((1L<<11)-1L);
+	exp -= (1L<<10) - 2L;
+	return ldexp(fr, exp);
+}
+
+static void
+puntfp(Prog *p)
+{
+	USED(p);
+	/* floating point - punt for now */
+	curtext->reg = NREG;	/* ARM */
+	curtext->from.sym->thumb = 0;
+	thumb = 0;
+	// print("%s: generating ARM code (contains floating point ops %d)\n", curtext->from.sym->name, p->line);
+}
+
+void
+undefsym(Sym *s)
+{
+	int n;
+
+	n = imports;
+	if(s->value != 0)
+		diag("value != 0 on SXREF");
+	if(n >= 1<<Rindex)
+		diag("import index %d out of range", n);
+	s->value = n<<Roffset;
+	s->type = SUNDEF;
+	imports++;
+}
+
+void
+zerosig(char *sp)
+{
+	Sym *s;
+
+	s = lookup(sp, 0);
+	s->sig = 0;
+}
+
+void
+readundefs(char *f, int t)
+{
+	int i, n;
+	Sym *s;
+	Biobuf *b;
+	char *l, buf[256], *fields[64];
+
+	if(f == nil)
+		return;
+	b = Bopen(f, OREAD);
+	if(b == nil){
+		diag("could not open %s: %r", f);
+		errorexit();
+	}
+	while((l = Brdline(b, '\n')) != nil){
+		n = Blinelen(b);
+		if(n >= sizeof(buf)){
+			diag("%s: line too long", f);
+			errorexit();
+		}
+		memmove(buf, l, n);
+		buf[n-1] = '\0';
+		n = getfields(buf, fields, nelem(fields), 1, " \t\r\n");
+		if(n == nelem(fields)){
+			diag("%s: bad format", f);
+			errorexit();
+		}
+		for(i = 0; i < n; i++){
+			s = lookup(fields[i], 0);
+			s->type = SXREF;
+			s->subtype = t;
+			if(t == SIMPORT)
+				nimports++;
+			else
+				nexports++;
+		}
+	}
+	Bterm(b);
+}
diff --git a/sys/src/cmd/tl/optab.c b/sys/src/cmd/tl/optab.c
new file mode 100644
index 000000000..65ad34475
--- /dev/null
+++ b/sys/src/cmd/tl/optab.c
@@ -0,0 +1,253 @@
+#include	"l.h"
+
+Optab	optab[] =
+{
+	{ ATEXT,	C_LEXT,	C_NONE,	C_LCON, 	 0, 0, 0 },
+	{ ATEXT,	C_LEXT,	C_REG,	C_LCON, 	 0, 0, 0 },
+	{ ATEXT,	C_ADDR,	C_NONE,	C_LCON, 	 0, 0, 0 },
+	{ ATEXT,	C_ADDR,	C_REG,	C_LCON, 	 0, 0, 0 },
+
+	{ AADD,		C_REG,	C_REG,	C_REG,		 1, 4, 0 },
+	{ AADD,		C_REG,	C_NONE,	C_REG,		 1, 4, 0 },
+	{ AMOVW,	C_REG,	C_NONE,	C_REG,		 1, 4, 0 },
+	{ AMVN,		C_REG,	C_NONE,	C_REG,		 1, 4, 0 },
+	{ ACMP,		C_REG,	C_REG,	C_NONE,		 1, 4, 0 },
+
+	{ AADD,		C_RCON,	C_REG,	C_REG,		 2, 4, 0 },
+	{ AADD,		C_RCON,	C_NONE,	C_REG,		 2, 4, 0 },
+	{ AMOVW,	C_RCON,	C_NONE,	C_REG,		 2, 4, 0 },
+	{ AMVN,		C_RCON,	C_NONE,	C_REG,		 2, 4, 0 },
+	{ ACMP,		C_RCON,	C_REG,	C_NONE,		 2, 4, 0 },
+
+	{ AADD,		C_SHIFT,C_REG,	C_REG,		 3, 4, 0 },
+	{ AADD,		C_SHIFT,C_NONE,	C_REG,		 3, 4, 0 },
+	{ AMVN,		C_SHIFT,C_NONE,	C_REG,		 3, 4, 0 },
+	{ ACMP,		C_SHIFT,C_REG,	C_NONE,		 3, 4, 0 },
+
+	{ AMOVW,	C_RECON,C_NONE,	C_REG,		 4, 4, REGSB },
+	{ AMOVW,	C_RACON,C_NONE,	C_REG,		 4, 4, REGSP },
+
+	{ AB,		C_NONE,	C_NONE,	C_SBRA,		 5, 4, 0,	LPOOL },
+	{ ABL,		C_NONE,	C_NONE,	C_SBRA,		 5, 4, 0 },
+	{ ABX,		C_NONE,	C_NONE,	C_SBRA,		 74, 20, 0 },
+	{ ABEQ,		C_NONE,	C_NONE,	C_SBRA,		 5, 4, 0 },
+
+	{ AB,		C_NONE,	C_NONE,	C_ROREG,	 6, 4, 0,	LPOOL },
+	{ ABL,		C_NONE,	C_NONE,	C_ROREG,	 7, 8, 0 },
+	{ ABX,		C_NONE,	C_NONE,	C_ROREG,	 75, 12, 0 },
+	{ ABXRET,		C_NONE,	C_NONE,	C_ROREG,	 76, 4, 0 },
+
+	{ ASLL,		C_RCON,	C_REG,	C_REG,		 8, 4, 0 },
+	{ ASLL,		C_RCON,	C_NONE,	C_REG,		 8, 4, 0 },
+
+	{ ASLL,		C_REG,	C_NONE,	C_REG,		 9, 4, 0 },
+	{ ASLL,		C_REG,	C_REG,	C_REG,		 9, 4, 0 },
+
+	{ ASWI,		C_NONE,	C_NONE,	C_NONE,		10, 4, 0 },
+	{ ASWI,		C_NONE,	C_NONE,	C_LOREG,	10, 4, 0 },
+
+	{ AWORD,	C_NONE,	C_NONE,	C_LCON,		11, 4, 0 },
+	{ AWORD,	C_NONE,	C_NONE,	C_GCON,		11, 4, 0 },
+	{ AWORD,	C_NONE,	C_NONE,	C_LEXT,		11, 4, 0 },
+	{ AWORD,	C_NONE,	C_NONE,	C_ADDR,		11, 4, 0 },
+
+	{ AMOVW,	C_NCON,	C_NONE,	C_REG,		12, 4, 0 },
+	{ AMOVW,	C_LCON,	C_NONE,	C_REG,		12, 4, 0,	LFROM },
+
+	{ AADD,		C_NCON,	C_REG,	C_REG,		13, 8, 0 },
+	{ AADD,		C_NCON,	C_NONE,	C_REG,		13, 8, 0 },
+	{ AMVN,		C_NCON,	C_NONE,	C_REG,		13, 8, 0 },
+	{ ACMP,		C_NCON,	C_REG,	C_NONE,		13, 8, 0 },
+	{ AADD,		C_LCON,	C_REG,	C_REG,		13, 8, 0,	LFROM },
+	{ AADD,		C_LCON,	C_NONE,	C_REG,		13, 8, 0,	LFROM },
+	{ AMVN,		C_LCON,	C_NONE,	C_REG,		13, 8, 0,	LFROM },
+	{ ACMP,		C_LCON,	C_REG,	C_NONE,		13, 8, 0,	LFROM },
+
+	{ AMOVB,	C_REG,	C_NONE,	C_REG,		14, 8, 0 },
+	{ AMOVBU,	C_REG,	C_NONE,	C_REG,		58, 4, 0 },
+	{ AMOVH,	C_REG,	C_NONE,	C_REG,		14, 8, 0 },
+	{ AMOVHU,	C_REG,	C_NONE,	C_REG,		14, 8, 0 },
+
+	{ AMUL,		C_REG,	C_REG,	C_REG,		15, 4, 0 },
+	{ AMUL,		C_REG,	C_NONE,	C_REG,		15, 4, 0 },
+
+	{ ADIV,		C_REG,	C_REG,	C_REG,		16, 4, 0 },
+	{ ADIV,		C_REG,	C_NONE,	C_REG,		16, 4, 0 },
+
+	{ AMULL,	C_REG,	C_REG,	C_REGREG,	17, 4, 0 },
+
+	{ AMOVW,	C_REG,	C_NONE,	C_SEXT,		20, 4, REGSB },
+	{ AMOVW,	C_REG,	C_NONE,	C_SAUTO,	20, 4, REGSP },
+	{ AMOVW,	C_REG,	C_NONE,	C_SOREG,	20, 4, 0 },
+	{ AMOVB,	C_REG,	C_NONE,	C_SEXT,		20, 4, REGSB },
+	{ AMOVB,	C_REG,	C_NONE,	C_SAUTO,	20, 4, REGSP },
+	{ AMOVB,	C_REG,	C_NONE,	C_SOREG,	20, 4, 0 },
+	{ AMOVBU,	C_REG,	C_NONE,	C_SEXT,		20, 4, REGSB },
+	{ AMOVBU,	C_REG,	C_NONE,	C_SAUTO,	20, 4, REGSP },
+	{ AMOVBU,	C_REG,	C_NONE,	C_SOREG,	20, 4, 0 },
+
+	{ AMOVW,	C_SEXT,	C_NONE,	C_REG,		21, 4, REGSB },
+	{ AMOVW,	C_SAUTO,C_NONE,	C_REG,		21, 4, REGSP },
+	{ AMOVW,	C_SOREG,C_NONE,	C_REG,		21, 4, 0 },
+	{ AMOVBU,	C_SEXT,	C_NONE,	C_REG,		21, 4, REGSB },
+	{ AMOVBU,	C_SAUTO,C_NONE,	C_REG,		21, 4, REGSP },
+	{ AMOVBU,	C_SOREG,C_NONE,	C_REG,		21, 4, 0 },
+
+	{ AMOVB,	C_SEXT,	C_NONE,	C_REG,		22, 12, REGSB },
+	{ AMOVB,	C_SAUTO,C_NONE,	C_REG,		22, 12, REGSP },
+	{ AMOVB,	C_SOREG,C_NONE,	C_REG,		22, 12, 0 },
+	{ AMOVH,	C_SEXT,	C_NONE,	C_REG,		22, 12, REGSB },
+	{ AMOVH,	C_SAUTO,C_NONE,	C_REG,		22, 12, REGSP },
+	{ AMOVH,	C_SOREG,C_NONE,	C_REG,		22, 12, 0 },
+	{ AMOVHU,	C_SEXT,	C_NONE,	C_REG,		22, 12, REGSB },
+	{ AMOVHU,	C_SAUTO,C_NONE,	C_REG,		22, 12, REGSP },
+	{ AMOVHU,	C_SOREG,C_NONE,	C_REG,		22, 12, 0 },
+
+	{ AMOVH,	C_REG,	C_NONE,	C_SEXT,		23, 12, REGSB },
+	{ AMOVH,	C_REG,	C_NONE,	C_SAUTO,	23, 12, REGSP },
+	{ AMOVH,	C_REG,	C_NONE,	C_SOREG,	23, 12, 0 },
+	{ AMOVHU,	C_REG,	C_NONE,	C_SEXT,		23, 12, REGSB },
+	{ AMOVHU,	C_REG,	C_NONE,	C_SAUTO,	23, 12, REGSP },
+	{ AMOVHU,	C_REG,	C_NONE,	C_SOREG,	23, 12, 0 },
+
+	{ AMOVW,	C_REG,	C_NONE,	C_LEXT,		30, 8, REGSB,	LTO },
+	{ AMOVW,	C_REG,	C_NONE,	C_LAUTO,	30, 8, REGSP,	LTO },
+	{ AMOVW,	C_REG,	C_NONE,	C_LOREG,	30, 8, 0,	LTO },
+	{ AMOVW,	C_REG,	C_NONE,	C_ADDR,		64, 8, 0,	LTO },
+	{ AMOVB,	C_REG,	C_NONE,	C_LEXT,		30, 8, REGSB,	LTO },
+	{ AMOVB,	C_REG,	C_NONE,	C_LAUTO,	30, 8, REGSP,	LTO },
+	{ AMOVB,	C_REG,	C_NONE,	C_LOREG,	30, 8, 0,	LTO },
+	{ AMOVB,	C_REG,	C_NONE,	C_ADDR,		64, 8, 0,	LTO },
+	{ AMOVBU,	C_REG,	C_NONE,	C_LEXT,		30, 8, REGSB,	LTO },
+	{ AMOVBU,	C_REG,	C_NONE,	C_LAUTO,	30, 8, REGSP,	LTO },
+	{ AMOVBU,	C_REG,	C_NONE,	C_LOREG,	30, 8, 0,	LTO },
+	{ AMOVBU,	C_REG,	C_NONE,	C_ADDR,		64, 8, 0,	LTO },
+
+	{ AMOVW,	C_LEXT,	C_NONE,	C_REG,		31, 8, REGSB,	LFROM },
+	{ AMOVW,	C_LAUTO,C_NONE,	C_REG,		31, 8, REGSP,	LFROM },
+	{ AMOVW,	C_LOREG,C_NONE,	C_REG,		31, 8, 0,	LFROM },
+	{ AMOVW,	C_ADDR,	C_NONE,	C_REG,		65, 8, 0,	LFROM },
+	{ AMOVBU,	C_LEXT,	C_NONE,	C_REG,		31, 8, REGSB,	LFROM },
+	{ AMOVBU,	C_LAUTO,C_NONE,	C_REG,		31, 8, REGSP,	LFROM },
+	{ AMOVBU,	C_LOREG,C_NONE,	C_REG,		31, 8, 0,	LFROM },
+	{ AMOVBU,	C_ADDR,	C_NONE,	C_REG,		65, 8, 0,	LFROM },
+
+	{ AMOVB,	C_LEXT,	C_NONE,	C_REG,		32, 16, REGSB,	LFROM },
+	{ AMOVB,	C_LAUTO,C_NONE,	C_REG,		32, 16, REGSP,	LFROM },
+	{ AMOVB,	C_LOREG,C_NONE,	C_REG,		32, 16, 0,	LFROM },
+	{ AMOVB,	C_ADDR,	C_NONE,	C_REG,		66, 16, 0,	LFROM },
+	{ AMOVH,	C_LEXT,	C_NONE,	C_REG,		32, 16, REGSB,	LFROM },
+	{ AMOVH,	C_LAUTO,C_NONE,	C_REG,		32, 16, REGSP,	LFROM },
+	{ AMOVH,	C_LOREG,C_NONE,	C_REG,		32, 16, 0,	LFROM },
+	{ AMOVH,	C_ADDR,	C_NONE,	C_REG,		66, 16, 0,	LFROM },
+	{ AMOVHU,	C_LEXT,	C_NONE,	C_REG,		32, 16, REGSB,	LFROM },
+	{ AMOVHU,	C_LAUTO,C_NONE,	C_REG,		32, 16, REGSP,	LFROM },
+	{ AMOVHU,	C_LOREG,C_NONE,	C_REG,		32, 16, 0,	LFROM },
+	{ AMOVHU,	C_ADDR,	C_NONE,	C_REG,		66, 16, 0,	LFROM },
+
+	{ AMOVH,	C_REG,	C_NONE,	C_LEXT,		33, 24, REGSB,	LTO },
+	{ AMOVH,	C_REG,	C_NONE,	C_LAUTO,	33, 24, REGSP,	LTO },
+	{ AMOVH,	C_REG,	C_NONE,	C_LOREG,	33, 24, 0,	LTO },
+	{ AMOVH,	C_REG,	C_NONE,	C_ADDR,		67, 24, 0,	LTO },
+	{ AMOVHU,	C_REG,	C_NONE,	C_LEXT,		33, 24, REGSB,	LTO },
+	{ AMOVHU,	C_REG,	C_NONE,	C_LAUTO,	33, 24, REGSP,	LTO },
+	{ AMOVHU,	C_REG,	C_NONE,	C_LOREG,	33, 24, 0,	LTO },
+	{ AMOVHU,	C_REG,	C_NONE,	C_ADDR,		67, 24, 0,	LTO },
+
+	{ AMOVW,	C_LECON,C_NONE,	C_REG,		34, 8, REGSB,	LFROM },
+	{ AMOVW,	C_LACON,C_NONE,	C_REG,		34, 8, REGSP,	LFROM },
+
+	{ AMOVW,	C_PSR,	C_NONE,	C_REG,		35, 4, 0 },
+	{ AMOVW,	C_REG,	C_NONE,	C_PSR,		36, 4, 0 },
+	{ AMOVW,	C_RCON,	C_NONE,	C_PSR,		37, 4, 0 },
+
+	{ AMOVM,	C_LCON,	C_NONE,	C_SOREG,	38, 4, 0 },
+	{ AMOVM,	C_SOREG,C_NONE,	C_LCON,		39, 4, 0 },
+
+	{ ASWPW,	C_SOREG,C_REG,	C_REG,		40, 4, 0 },
+
+	{ ARFE,		C_NONE,	C_NONE,	C_NONE,		41, 4, 0 },
+
+	{ AMOVF,	C_FREG,	C_NONE,	C_FEXT,		50, 4, REGSB },
+	{ AMOVF,	C_FREG,	C_NONE,	C_FAUTO,	50, 4, REGSP },
+	{ AMOVF,	C_FREG,	C_NONE,	C_FOREG,	50, 4, 0 },
+
+	{ AMOVF,	C_FEXT,	C_NONE,	C_FREG,		51, 4, REGSB },
+	{ AMOVF,	C_FAUTO,C_NONE,	C_FREG,		51, 4, REGSP },
+	{ AMOVF,	C_FOREG,C_NONE,	C_FREG,		51, 4, 0 },
+
+	{ AMOVF,	C_FREG,	C_NONE,	C_LEXT,		52, 12, REGSB,	LTO },
+	{ AMOVF,	C_FREG,	C_NONE,	C_LAUTO,	52, 12, REGSP,	LTO },
+	{ AMOVF,	C_FREG,	C_NONE,	C_LOREG,	52, 12, 0,	LTO },
+
+	{ AMOVF,	C_LEXT,	C_NONE,	C_FREG,		53, 12, REGSB,	LFROM },
+	{ AMOVF,	C_LAUTO,C_NONE,	C_FREG,		53, 12, REGSP,	LFROM },
+	{ AMOVF,	C_LOREG,C_NONE,	C_FREG,		53, 12, 0,	LFROM },
+
+	{ AMOVF,	C_FREG,	C_NONE,	C_ADDR,		68, 8, 0,	LTO },
+	{ AMOVF,	C_ADDR,	C_NONE,	C_FREG,		69, 8, 0,	LFROM },
+
+	{ AADDF,	C_FREG,	C_NONE,	C_FREG,		54, 4, 0 },
+	{ AADDF,	C_FREG,	C_REG,	C_FREG,		54, 4, 0 },
+	{ AADDF,	C_FCON,	C_NONE,	C_FREG,		54, 4, 0 },
+	{ AADDF,	C_FCON,	C_REG,	C_FREG,		54, 4, 0 },
+	{ AMOVF,	C_FCON,	C_NONE,	C_FREG,		54, 4, 0 },
+	{ AMOVF,	C_FREG, C_NONE, C_FREG,		54, 4, 0 },
+
+	{ ACMPF,	C_FREG,	C_REG,	C_NONE,		54, 4, 0 },
+	{ ACMPF,	C_FCON,	C_REG,	C_NONE,		54, 4, 0 },
+
+	{ AMOVFW,	C_FREG,	C_NONE,	C_REG,		55, 4, 0 },
+	{ AMOVFW,	C_REG,	C_NONE,	C_FREG,		55, 4, 0 },
+
+	{ AMOVW,	C_REG,	C_NONE,	C_FCR,		56, 4, 0 },
+	{ AMOVW,	C_FCR,	C_NONE,	C_REG,		57, 4, 0 },
+
+	{ AMOVW,	C_SHIFT,C_NONE,	C_REG,		59, 4, 0 },
+	{ AMOVBU,	C_SHIFT,C_NONE,	C_REG,		59, 4, 0 },
+
+	{ AMOVB,	C_SHIFT,C_NONE,	C_REG,		60, 4, 0 },
+
+	{ AMOVW,	C_REG,	C_NONE,	C_SHIFT,	61, 4, 0 },
+	{ AMOVB,	C_REG,	C_NONE,	C_SHIFT,	61, 4, 0 },
+	{ AMOVBU,	C_REG,	C_NONE,	C_SHIFT,	61, 4, 0 },
+
+	{ ACASE,	C_REG,	C_NONE,	C_NONE,		62, 4, 0 },
+	{ ABCASE,	C_NONE, C_NONE, C_SBRA,		63, 4, 0 },
+
+	{ AMOVH,	C_REG,	C_NONE,	C_HEXT,		70, 4, REGSB,	V4 },
+	{ AMOVH,	C_REG,	C_NONE, C_HAUTO,	70, 4, REGSP,	V4 },
+	{ AMOVH,	C_REG,	C_NONE,	C_HOREG,	70, 4, 0,	V4 },
+	{ AMOVHU,	C_REG,	C_NONE,	C_HEXT,		70, 4, REGSB,	V4 },
+	{ AMOVHU,	C_REG,	C_NONE, C_HAUTO,	70, 4, REGSP,	V4 },
+	{ AMOVHU,	C_REG,	C_NONE,	C_HOREG,	70, 4, 0,	V4 },
+
+	{ AMOVB,	C_HEXT,	C_NONE, C_REG,		71, 4, REGSB,	V4 },
+	{ AMOVB,	C_HAUTO,C_NONE,	C_REG,		71, 4, REGSP,	V4 },
+	{ AMOVB,	C_HOREG,C_NONE,	C_REG,		71, 4, 0,	V4 },
+	{ AMOVH,	C_HEXT,	C_NONE,	C_REG,		71, 4, REGSB,	V4 },
+	{ AMOVH,	C_HAUTO,C_NONE, C_REG,		71, 4, REGSP,	V4 },
+	{ AMOVH,	C_HOREG,C_NONE,	C_REG,		71, 4, 0,	V4 },
+	{ AMOVHU,	C_HEXT,	C_NONE,	C_REG,		71, 4, REGSB,	V4 },
+	{ AMOVHU,	C_HAUTO,C_NONE, C_REG,		71, 4, REGSP,	V4 },
+	{ AMOVHU,	C_HOREG,C_NONE,	C_REG,		71, 4, 0,	V4 },
+
+	{ AMOVH,	C_REG,	C_NONE,	C_LEXT,		72, 8, REGSB,	LTO|V4 },
+	{ AMOVH,	C_REG,	C_NONE, C_LAUTO,	72, 8, REGSP,	LTO|V4 },
+	{ AMOVH,	C_REG,	C_NONE,	C_LOREG,	72, 8, 0,	LTO|V4 },
+	{ AMOVHU,	C_REG,	C_NONE,	C_LEXT,		72, 8, REGSB,	LTO|V4 },
+	{ AMOVHU,	C_REG,	C_NONE, C_LAUTO,	72, 8, REGSP,	LTO|V4 },
+	{ AMOVHU,	C_REG,	C_NONE,	C_LOREG,	72, 8, 0,	LTO|V4 },
+
+	{ AMOVB,	C_LEXT,	C_NONE, C_REG,		73, 8, REGSB,	LFROM|V4 },
+	{ AMOVB,	C_LAUTO,C_NONE,	C_REG,		73, 8, REGSP,	LFROM|V4 },
+	{ AMOVB,	C_LOREG,C_NONE,	C_REG,		73, 8, 0,	LFROM|V4 },
+	{ AMOVH,	C_LEXT,	C_NONE,	C_REG,		73, 8, REGSB,	LFROM|V4 },
+	{ AMOVH,	C_LAUTO,C_NONE, C_REG,		73, 8, REGSP,	LFROM|V4 },
+	{ AMOVH,	C_LOREG,C_NONE,	C_REG,		73, 8, 0,	LFROM|V4 },
+	{ AMOVHU,	C_LEXT,	C_NONE,	C_REG,		73, 8, REGSB,	LFROM|V4 },
+	{ AMOVHU,	C_LAUTO,C_NONE, C_REG,		73, 8, REGSP,	LFROM|V4 },
+	{ AMOVHU,	C_LOREG,C_NONE,	C_REG,		73, 8, 0,	LFROM|V4 },
+
+	{ AXXX,		C_NONE,	C_NONE,	C_NONE,		 0, 4, 0 },
+};
diff --git a/sys/src/cmd/tl/pass.c b/sys/src/cmd/tl/pass.c
new file mode 100644
index 000000000..e4322df5c
--- /dev/null
+++ b/sys/src/cmd/tl/pass.c
@@ -0,0 +1,942 @@
+#include	"l.h"
+
+void
+dodata(void)
+{
+	int i, t;
+	Sym *s;
+	Prog *p;
+	long orig, v;
+
+	if(debug['v'])
+		Bprint(&bso, "%5.2f dodata\n", cputime());
+	Bflush(&bso);
+	for(p = datap; p != P; p = p->link) {
+		s = p->from.sym;
+		if(p->as == ADYNT || p->as == AINIT)
+			s->value = dtype;
+		if(s->type == SBSS)
+			s->type = SDATA;
+		if(s->type != SDATA)
+			diag("initialize non-data (%d): %s\n%P",
+				s->type, s->name, p);
+		v = p->from.offset + p->reg;
+		if(v > s->value)
+			diag("initialize bounds (%ld): %s\n%P",
+				s->value, s->name, p);
+		if((s->type == SBSS || s->type == SDATA) && (p->to.type == D_CONST || p->to.type == D_OCONST) && (p->to.name == D_EXTERN || p->to.name == D_STATIC)){
+			s = p->to.sym;
+			if(s != S && (s->type == STEXT || s->type == SLEAF || s->type == SCONST || s->type == SXREF))
+				s->fnptr = 1;
+		}
+	}
+
+	if(debug['t']) {
+		/*
+		 * pull out string constants
+		 */
+		for(p = datap; p != P; p = p->link) {
+			s = p->from.sym;
+			if(p->to.type == D_SCONST)
+				s->type = SSTRING;
+		}
+	}
+
+	/*
+	 * pass 1
+	 *	assign 'small' variables to data segment
+	 *	(rational is that data segment is more easily
+	 *	 addressed through offset on R12)
+	 */
+	orig = 0;
+	for(i=0; i<NHASH; i++)
+	for(s = hash[i]; s != S; s = s->link) {
+		t = s->type;
+		if(t != SDATA && t != SBSS)
+			continue;
+		v = s->value;
+		if(v == 0) {
+			diag("%s: no size", s->name);
+			v = 1;
+		}
+		while(v & 3)
+			v++;
+		s->value = v;
+		if(v > MINSIZ)
+			continue;
+		s->value = orig;
+		orig += v;
+		s->type = SDATA1;
+	}
+
+	/*
+	 * pass 2
+	 *	assign large 'data' variables to data segment
+	 */
+	for(i=0; i<NHASH; i++)
+	for(s = hash[i]; s != S; s = s->link) {
+		t = s->type;
+		if(t != SDATA) {
+			if(t == SDATA1)
+				s->type = SDATA;
+			continue;
+		}
+		v = s->value;
+		s->value = orig;
+		orig += v;
+	}
+
+	while(orig & 7)
+		orig++;
+	datsize = orig;
+
+	/*
+	 * pass 3
+	 *	everything else to bss segment
+	 */
+	for(i=0; i<NHASH; i++)
+	for(s = hash[i]; s != S; s = s->link) {
+		if(s->type != SBSS)
+			continue;
+		v = s->value;
+		s->value = orig;
+		orig += v;
+	}
+	while(orig & 7)
+		orig++;
+	bsssize = orig-datsize;
+
+	xdefine("setR12", SDATA, 0L+BIG);
+	xdefine("bdata", SDATA, 0L);
+	xdefine("edata", SDATA, datsize);
+	xdefine("end", SBSS, datsize+bsssize);
+	xdefine("etext", STEXT, 0L);
+}
+
+void
+undef(void)
+{
+	int i;
+	Sym *s;
+
+	for(i=0; i<NHASH; i++)
+	for(s = hash[i]; s != S; s = s->link)
+		if(s->type == SXREF)
+			diag("%s: not defined", s->name);
+}
+
+Prog*
+brchain(Prog *p)
+{
+	int i;
+
+	for(i=0; i<20; i++) {
+		if(p == P || p->as != AB)
+			return p;
+		p = p->cond;
+	}
+	return P;
+}
+
+int
+relinv(int a)
+{
+	switch(a) {
+	case ABEQ:	return ABNE;
+	case ABNE:	return ABEQ;
+	case ABCS:	return ABCC;
+	case ABHS:	return ABLO;
+	case ABCC:	return ABCS;
+	case ABLO:	return ABHS;
+	case ABMI:	return ABPL;
+	case ABPL:	return ABMI;
+	case ABVS:	return ABVC;
+	case ABVC:	return ABVS;
+	case ABHI:	return ABLS;
+	case ABLS:	return ABHI;
+	case ABGE:	return ABLT;
+	case ABLT:	return ABGE;
+	case ABGT:	return ABLE;
+	case ABLE:	return ABGT;
+	}
+	diag("unknown relation: %s", anames[a]);
+	return a;
+}
+
+void
+follow(void)
+{
+	if(debug['v'])
+		Bprint(&bso, "%5.2f follow\n", cputime());
+	Bflush(&bso);
+
+	firstp = prg();
+	lastp = firstp;
+	xfol(textp);
+
+	firstp = firstp->link;
+	lastp->link = P;
+}
+
+void
+xfol(Prog *p)
+{
+	Prog *q, *r;
+	int a, i;
+
+loop:
+	if(p == P)
+		return;
+	setarch(p);
+	a = p->as;
+	if(a == ATEXT)
+		curtext = p;
+	if(a == AB) {
+		q = p->cond;
+		if(q != P) {
+			p->mark |= FOLL;
+			p = q;
+			if(!(p->mark & FOLL))
+				goto loop;
+		}
+	}
+	if(p->mark & FOLL) {
+		for(i=0,q=p; i<4; i++,q=q->link) {
+			if(q == lastp)
+				break;
+			a = q->as;
+			if(a == ANOP) {
+				i--;
+				continue;
+			}
+			if(a == AB || (a == ARET && q->scond == 14) || a == ARFE)
+				goto copy;
+			if(!q->cond || (q->cond->mark&FOLL))
+				continue;
+			if(a != ABEQ && a != ABNE)
+				continue;
+		copy:
+			for(;;) {
+				r = prg();
+				*r = *p;
+				if(!(r->mark&FOLL))
+					print("cant happen 1\n");
+				r->mark |= FOLL;
+				if(p != q) {
+					p = p->link;
+					lastp->link = r;
+					lastp = r;
+					continue;
+				}
+				lastp->link = r;
+				lastp = r;
+				if(a == AB || (a == ARET && q->scond == 14) || a == ARFE)
+					return;
+				r->as = ABNE;
+				if(a == ABNE)
+					r->as = ABEQ;
+				r->cond = p->link;
+				r->link = p->cond;
+				if(!(r->link->mark&FOLL))
+					xfol(r->link);
+				if(!(r->cond->mark&FOLL))
+					print("cant happen 2\n");
+				return;
+			}
+		}
+		a = AB;
+		q = prg();
+		q->as = a;
+		q->line = p->line;
+		q->to.type = D_BRANCH;
+		q->to.offset = p->pc;
+		q->cond = p;
+		p = q;
+	}
+	p->mark |= FOLL;
+	lastp->link = p;
+	lastp = p;
+	if(a == AB || (a == ARET && p->scond == 14) || a == ARFE){
+		return;
+	}
+	if(p->cond != P)
+	if(a != ABL && a != ABX && p->link != P) {
+		q = brchain(p->link);
+		if(a != ATEXT && a != ABCASE)
+		if(q != P && (q->mark&FOLL)) {
+			p->as = relinv(a);
+			p->link = p->cond;
+			p->cond = q;
+		}
+		xfol(p->link);
+		q = brchain(p->cond);
+		if(q == P)
+			q = p->cond;
+		if(q->mark&FOLL) {
+			p->cond = q;
+			return;
+		}
+		p = q;
+		goto loop;
+	}
+	p = p->link;
+	goto loop;
+}
+
+void
+patch(void)
+{
+	long c, vexit;
+	Prog *p, *q;
+	Sym *s, *s1;
+	int a;
+
+	if(debug['v'])
+		Bprint(&bso, "%5.2f patch\n", cputime());
+	Bflush(&bso);
+	mkfwd();
+	s = lookup("exit", 0);
+	vexit = s->value;
+	for(p = firstp; p != P; p = p->link) {
+		setarch(p);
+		a = p->as;
+		if(a == ATEXT)
+			curtext = p;
+		if(seenthumb && a == ABL){
+			// if((s = p->to.sym) != S && (s1 = curtext->from.sym) != S)
+			//	print("%s calls %s\n", s1->name, s->name);
+			 if((s = p->to.sym) != S && (s1 = curtext->from.sym) != S && s->thumb != s1->thumb)
+				s->foreign = 1;
+		}
+		if((a == ABL || a == ABX || a == AB || a == ARET) &&
+		   p->to.type != D_BRANCH && p->to.sym != S) {
+			s = p->to.sym;
+			switch(s->type) {
+			default:
+				diag("undefined: %s\n%P", s->name, p);
+				s->type = STEXT;
+				s->value = vexit;
+				break;
+			case STEXT:
+				p->to.offset = s->value;
+				p->to.type = D_BRANCH;
+				break;
+			case SUNDEF:
+				if(p->as != ABL)
+					diag("help: SUNDEF in AB || ARET");
+				p->to.offset = 0;
+				p->to.type = D_BRANCH;
+				p->cond = UP;
+				break;
+			}
+		}
+		if(p->to.type != D_BRANCH || p->cond == UP)
+			continue;
+		c = p->to.offset;
+		for(q = firstp; q != P;) {
+			if(q->forwd != P)
+			if(c >= q->forwd->pc) {
+				q = q->forwd;
+				continue;
+			}
+			if(c == q->pc)
+				break;
+			q = q->link;
+		}
+		if(q == P) {
+			diag("branch out of range %ld\n%P", c, p);
+			p->to.type = D_NONE;
+		}
+		p->cond = q;
+	}
+
+	for(p = firstp; p != P; p = p->link) {
+		setarch(p);
+		a = p->as;
+		if(p->as == ATEXT)
+			curtext = p;
+		if(seenthumb && a == ABL) {
+#ifdef CALLEEBX
+			if(0)
+				{}
+#else
+			if((s = p->to.sym) != S && (s->foreign || s->fnptr))
+				p->as = ABX;
+#endif
+			else if(p->to.type == D_OREG)
+				p->as = ABX;
+		}
+		if(p->cond != P && p->cond != UP) {
+			p->cond = brloop(p->cond);
+			if(p->cond != P)
+			if(p->to.type == D_BRANCH)
+				p->to.offset = p->cond->pc;
+		}
+	}
+}
+
+#define	LOG	5
+void
+mkfwd(void)
+{
+	Prog *p;
+	long dwn[LOG], cnt[LOG], i;
+	Prog *lst[LOG];
+
+	for(i=0; i<LOG; i++) {
+		if(i == 0)
+			cnt[i] = 1; else
+			cnt[i] = LOG * cnt[i-1];
+		dwn[i] = 1;
+		lst[i] = P;
+	}
+	i = 0;
+	for(p = firstp; p != P; p = p->link) {
+		if(p->as == ATEXT)
+			curtext = p;
+		i--;
+		if(i < 0)
+			i = LOG-1;
+		p->forwd = P;
+		dwn[i]--;
+		if(dwn[i] <= 0) {
+			dwn[i] = cnt[i];
+			if(lst[i] != P)
+				lst[i]->forwd = p;
+			lst[i] = p;
+		}
+	}
+}
+
+Prog*
+brloop(Prog *p)
+{
+	Prog *q;
+	int c;
+
+	for(c=0; p!=P;) {
+		if(p->as != AB)
+			return p;
+		q = p->cond;
+		if(q <= p) {
+			c++;
+			if(q == p || c > 5000)
+				break;
+		}
+		p = q;
+	}
+	return P;
+}
+
+long
+atolwhex(char *s)
+{
+	long n;
+	int f;
+
+	n = 0;
+	f = 0;
+	while(*s == ' ' || *s == '\t')
+		s++;
+	if(*s == '-' || *s == '+') {
+		if(*s++ == '-')
+			f = 1;
+		while(*s == ' ' || *s == '\t')
+			s++;
+	}
+	if(s[0]=='0' && s[1]){
+		if(s[1]=='x' || s[1]=='X'){
+			s += 2;
+			for(;;){
+				if(*s >= '0' && *s <= '9')
+					n = n*16 + *s++ - '0';
+				else if(*s >= 'a' && *s <= 'f')
+					n = n*16 + *s++ - 'a' + 10;
+				else if(*s >= 'A' && *s <= 'F')
+					n = n*16 + *s++ - 'A' + 10;
+				else
+					break;
+			}
+		} else
+			while(*s >= '0' && *s <= '7')
+				n = n*8 + *s++ - '0';
+	} else
+		while(*s >= '0' && *s <= '9')
+			n = n*10 + *s++ - '0';
+	if(f)
+		n = -n;
+	return n;
+}
+
+long
+rnd(long v, long r)
+{
+	long c;
+
+	if(r <= 0)
+		return v;
+	v += r - 1;
+	c = v % r;
+	if(c < 0)
+		c += r;
+	v -= c;
+	return v;
+}
+
+#define Reachable(n)	if((s = lookup(n, 0)) != nil) s->used++
+
+static void
+rused(Adr *a)
+{
+	Sym *s = a->sym;
+
+	if(s == S)
+		return;
+	if(a->type == D_OREG || a->type == D_OCONST || a->type == D_CONST){
+		if(a->name == D_EXTERN || a->name == D_STATIC){
+			if(s->used == 0)
+				s->used = 1;
+		}
+	}
+	else if(a->type == D_BRANCH){
+		if(s->used == 0)
+			s->used = 1;
+	}
+}
+
+void
+reachable()
+{
+	Prog *p, *prev, *prevt, *nextt, *q;
+	Sym *s, *s0;
+	int i, todo;
+	char *a;
+
+	Reachable("_div");
+	Reachable("_divu");
+	Reachable("_mod");
+	Reachable("_modu");
+	a = INITENTRY;
+	if(*a >= '0' && *a <= '9')
+		return;
+	s = lookup(a, 0);
+	if(s == nil)
+		return;
+	if(s->type == 0){
+		s->used = 1;	// to stop asm complaining
+		for(p = firstp; p != P && p->as != ATEXT; p = p->link)
+			;
+		if(p == nil)
+			return;
+		s = p->from.sym;
+	}	
+	s->used = 1;
+	do{
+		todo = 0;
+		for(p = firstp; p != P; p = p->link){
+			if(p->as == ATEXT && (s0 = p->from.sym)->used == 1){
+				todo = 1;
+				for(q = p->link; q != P && q->as != ATEXT; q = q->link){
+					rused(&q->from);
+					rused(&q->to);
+				}
+				s0->used = 2;
+			}
+		}
+		for(p = datap; p != P; p = p->link){
+			if((s0 = p->from.sym)->used == 1){
+				todo = 1;
+				for(q = p; q != P; q = q->link){	// data can be scattered
+					if(q->from.sym == s0)
+						rused(&q->to);
+				}
+				s0->used = 2;
+			}
+		}
+	}while(todo);
+	prev = nil;
+	prevt = nextt = nil;
+	for(p = firstp; p != P; ){
+		if(p->as == ATEXT){
+			prevt = nextt;
+			nextt = p;
+		}
+		if(p->as == ATEXT && (s0 = p->from.sym)->used == 0){
+			s0->type = SREMOVED;
+			for(q = p->link; q != P && q->as != ATEXT; q = q->link)
+				;
+			if(q != p->cond)
+				diag("bad ptr in reachable()");
+			if(prev == nil)
+				firstp = q;
+			else
+				prev->link = q;
+			if(q == nil)
+				lastp = prev;
+			if(prevt == nil)
+				textp = q;
+			else
+				prevt->cond = q;
+			if(q == nil)
+				etextp = prevt;
+			nextt = prevt;
+			if(debug['V'])
+				print("%s unused\n", s0->name);
+			p = q;
+		}
+		else{
+			prev = p;
+			p = p->link;
+		}
+	}
+	prevt = nil;
+	for(p = datap; p != nil; ){
+		if((s0 = p->from.sym)->used == 0){
+			s0->type = SREMOVED;
+			prev = prevt;
+			for(q = p; q != nil; q = q->link){
+				if(q->from.sym == s0){
+					if(prev == nil)
+						datap = q->link;
+					else
+						prev->link = q->link;
+				}
+				else
+					prev = q;
+			}
+			if(debug['V'])
+				print("%s unused (data)\n", s0->name);
+			p = prevt->link;
+		}
+		else{
+			prevt = p;
+			p = p->link;
+		}
+	}
+	for(i=0; i<NHASH; i++){
+		for(s = hash[i]; s != S; s = s->link){
+			if(s->used == 0)
+				s->type = SREMOVED;
+		}
+	}
+}
+
+static void
+fused(Adr *a, Prog *p, Prog *ct)
+{
+	Sym *s = a->sym;
+	Use *u;
+
+	if(s == S)
+		return;
+	if(a->type == D_OREG || a->type == D_OCONST || a->type == D_CONST){
+		if(a->name == D_EXTERN || a->name == D_STATIC){
+			u = malloc(sizeof(Use));
+			u->p = p;
+			u->ct = ct;
+			u->link = s->use;
+			s->use = u;
+		}
+	}
+	else if(a->type == D_BRANCH){
+		u = malloc(sizeof(Use));
+		u->p = p;
+		u->ct = ct;
+		u->link = s->use;
+		s->use = u;
+	}
+}
+
+static int
+ckfpuse(Prog *p, Prog *ct, Sym *fp, Sym *r)
+{
+	int reg;
+
+	USED(fp);
+	USED(ct);
+	if(p->from.sym == r && p->as == AMOVW && (p->from.type == D_CONST || p->from.type == D_OREG) && p->reg == NREG && p->to.type == D_REG){
+		reg = p->to.reg;
+		for(p = p->link; p != P && p->as != ATEXT; p = p->link){
+			if((p->as == ABL || p->as == ABX) && p->to.type == D_OREG && p->to.reg == reg)
+				return 1;
+			if(!debug['F'] && (isbranch(p) || p->as == ARET)){
+				// print("%s: branch %P in %s\n", fp->name, p, ct->from.sym->name);
+				return 0;
+			}
+			if((p->from.type == D_REG || p->from.type == D_OREG) && p->from.reg == reg){
+				if(!debug['F'] && p->to.type != D_REG){
+					// print("%s: store %P in %s\n", fp->name, p, ct->from.sym->name);
+					return 0;
+				}
+				reg = p->to.reg;
+			}
+		}
+	}
+	// print("%s: no MOVW O(R), R\n", fp->name);
+	return debug['F'];
+}
+
+static void
+setfpuse(Prog *p, Sym *fp, Sym *r)
+{
+	int reg;
+
+	if(p->from.sym == r && p->as == AMOVW && (p->from.type == D_CONST || p->from.type == D_OREG) && p->reg == NREG && p->to.type == D_REG){
+		reg = p->to.reg;
+		for(p = p->link; p != P && p->as != ATEXT; p = p->link){
+			if((p->as == ABL || p->as == ABX) && p->to.type == D_OREG && p->to.reg == reg){
+				fp->fnptr = 0;
+				p->as = ABL;	// safe to do so
+// print("simplified %s call\n", fp->name);
+				break;
+			}
+			if(!debug['F'] && (isbranch(p) || p->as == ARET))
+				diag("bad setfpuse call");
+			if((p->from.type == D_REG || p->from.type == D_OREG) && p->from.reg == reg){
+				if(!debug['F'] && p->to.type != D_REG)
+					diag("bad setfpuse call");
+				reg = p->to.reg;
+			}
+		}
+	}
+}
+
+static int
+cksymuse(Sym *s, int t)
+{
+	Prog *p;
+
+	for(p = datap; p != P; p = p->link){
+		if(p->from.sym == s && p->to.sym != nil && strcmp(p->to.sym->name, ".string") != 0 && p->to.sym->thumb != t){
+			// print("%s %s %d %d ", p->from.sym->name, p->to.sym->name, p->to.sym->thumb, t);
+			return 0;
+		}
+	}
+	return 1;
+}
+
+/* check the use of s at the given point */
+static int
+ckuse(Sym *s, Sym *s0, Use *u)
+{
+	Sym *s1;
+
+	s1 = u->p->from.sym;
+// print("ckuse %s %s %s\n", s->name, s0->name, s1 ? s1->name : "nil");
+	if(u->ct == nil){	/* in data area */
+		if(s0 == s && !cksymuse(s1, s0->thumb)){
+			// print("%s: cksymuse fails\n", s0->name);
+			return 0;
+		}
+		for(u = s1->use; u != U; u = u->link)
+			if(!ckuse(s1, s0, u))
+				return 0;
+	}
+	else{		/* in text area */
+		if(u->ct->from.sym->thumb != s0->thumb){
+			// print("%s(%d): foreign call %s(%d)\n", s0->name, s0->thumb, u->ct->from.sym->name, u->ct->from.sym->thumb);
+			return 0;
+		}
+		return ckfpuse(u->p, u->ct, s0, s);
+	}
+	return 1;
+}
+		
+static void
+setuse(Sym *s, Sym *s0, Use *u)
+{
+	Sym *s1;
+
+	s1 = u->p->from.sym;
+	if(u->ct == nil){	/* in data area */
+		for(u = s1->use; u != U; u = u->link)
+			setuse(s1, s0, u);
+	}
+	else{		/* in text area */
+		setfpuse(u->p, s0, s);
+	}
+}
+		
+/* detect BX O(R) which can be done as BL O(R) */
+void
+fnptrs()
+{
+	int i;
+	Sym *s;
+	Prog *p;
+	Use *u;
+	
+	for(i=0; i<NHASH; i++){
+		for(s = hash[i]; s != S; s = s->link){
+			if(s->fnptr && (s->type == STEXT || s->type == SLEAF || s->type == SCONST)){
+				// print("%s : fnptr %d %d\n", s->name, s->thumb, s->foreign);
+			}
+		}
+	}	
+	/* record use of syms */
+	for(p = firstp; p != P; p = p->link){
+		if(p->as == ATEXT)
+			curtext = p;
+		else{
+			fused(&p->from, p, curtext);
+			fused(&p->to, p, curtext);
+		}
+	}
+	for(p = datap; p != P; p = p->link)
+		fused(&p->to, p, nil);
+
+	/* now look for fn ptrs */
+	for(i=0; i<NHASH; i++){
+		for(s = hash[i]; s != S; s = s->link){
+			if(s->fnptr && (s->type == STEXT || s->type == SLEAF || s->type == SCONST)){
+				for(u = s->use; u != U; u = u->link){
+					if(!ckuse(s, s, u))
+						break;
+				}
+				if(u == U){		// can simplify
+					for(u = s->use; u != U; u = u->link)
+						setuse(s, s, u);
+				}
+			}	
+		}
+	}
+
+	/*  now free Use structures */
+}
+
+void
+import(void)
+{
+	int i;
+	Sym *s;
+
+	for(i = 0; i < NHASH; i++)
+		for(s = hash[i]; s != S; s = s->link)
+			if(s->sig != 0 && s->type == SXREF && (nimports == 0 || s->subtype == SIMPORT)){
+				undefsym(s);
+				Bprint(&bso, "IMPORT: %s sig=%lux v=%ld\n", s->name, s->sig, s->value);
+			}
+}
+
+void
+ckoff(Sym *s, long v)
+{
+	if(v < 0 || v >= 1<<Roffset)
+		diag("relocation offset %ld for %s out of range", v, s->name);
+}
+
+static Prog*
+newdata(Sym *s, int o, int w, int t)
+{
+	Prog *p;
+
+	p = prg();
+	p->link = datap;
+	datap = p;
+	p->as = ADATA;
+	p->reg = w;
+	p->from.type = D_OREG;
+	p->from.name = t;
+	p->from.sym = s;
+	p->from.offset = o;
+	p->to.type = D_CONST;
+	p->to.name = D_NONE;
+	return p;
+}
+
+void
+export(void)
+{
+	int i, j, n, off, nb, sv, ne;
+	Sym *s, *et, *str, **esyms;
+	Prog *p;
+	char buf[NSNAME], *t;
+
+	n = 0;
+	for(i = 0; i < NHASH; i++)
+		for(s = hash[i]; s != S; s = s->link)
+			if(s->sig != 0 && s->type != SXREF && s->type != SUNDEF && (nexports == 0 || s->subtype == SEXPORT))
+				n++;
+	esyms = malloc(n*sizeof(Sym*));
+	ne = n;
+	n = 0;
+	for(i = 0; i < NHASH; i++)
+		for(s = hash[i]; s != S; s = s->link)
+			if(s->sig != 0 && s->type != SXREF && s->type != SUNDEF && (nexports == 0 || s->subtype == SEXPORT))
+				esyms[n++] = s;
+	for(i = 0; i < ne-1; i++)
+		for(j = i+1; j < ne; j++)
+			if(strcmp(esyms[i]->name, esyms[j]->name) > 0){
+				s = esyms[i];
+				esyms[i] = esyms[j];
+				esyms[j] = s;
+			}
+
+	nb = 0;
+	off = 0;
+	et = lookup(EXPTAB, 0);
+	if(et->type != 0 && et->type != SXREF)
+		diag("%s already defined", EXPTAB);
+	et->type = SDATA;
+	str = lookup(".string", 0);
+	if(str->type == 0)
+		str->type = SDATA;
+	sv = str->value;
+	for(i = 0; i < ne; i++){
+		s = esyms[i];
+		Bprint(&bso, "EXPORT: %s sig=%lux t=%d\n", s->name, s->sig, s->type);
+
+		/* signature */
+		p = newdata(et, off, sizeof(long), D_EXTERN);
+		off += sizeof(long);
+		p->to.offset = s->sig;
+
+		/* address */
+		p = newdata(et, off, sizeof(long), D_EXTERN);
+		off += sizeof(long);
+		p->to.name = D_EXTERN;
+		p->to.sym = s;
+
+		/* string */
+		t = s->name;
+		n = strlen(t)+1;
+		for(;;){
+			buf[nb++] = *t;
+			sv++;
+			if(nb >= NSNAME){
+				p = newdata(str, sv-NSNAME, NSNAME, D_STATIC);
+				p->to.type = D_SCONST;
+				p->to.sval = malloc(NSNAME);
+				memmove(p->to.sval, buf, NSNAME);
+				nb = 0;
+			}
+			if(*t++ == 0)
+				break;
+		}
+
+		/* name */
+		p = newdata(et, off, sizeof(long), D_EXTERN);
+		off += sizeof(long);
+		p->to.name = D_STATIC;
+		p->to.sym = str;
+		p->to.offset = sv-n;
+	}
+
+	if(nb > 0){
+		p = newdata(str, sv-nb, nb, D_STATIC);
+		p->to.type = D_SCONST;
+		p->to.sval = malloc(NSNAME);
+		memmove(p->to.sval, buf, nb);
+	}
+
+	for(i = 0; i < 3; i++){
+		newdata(et, off, sizeof(long), D_EXTERN);
+		off += sizeof(long);
+	}
+	et->value = off;
+	if(sv == 0)
+		sv = 1;
+	str->value = sv;
+	exports = ne;
+	free(esyms);
+}
diff --git a/sys/src/cmd/tl/span.c b/sys/src/cmd/tl/span.c
new file mode 100644
index 000000000..85f27621e
--- /dev/null
+++ b/sys/src/cmd/tl/span.c
@@ -0,0 +1,1262 @@
+#include	"l.h"
+
+static struct {
+	ulong	start;
+	ulong	size;
+	ulong	extra;
+} pool;
+
+int	checkpool(Prog*, int);
+int 	flushpool(Prog*, int, int);
+
+int
+isbranch(Prog *p)
+{
+	int as = p->as;
+	return (as >= ABEQ && as <= ABLE) || as == AB || as == ABL || as == ABX;
+}
+
+static int
+ispad(Prog *p)
+{
+	if(p->as != AMOVW)
+		return 0;
+	if(p->from.type != D_REG || p->from.reg != REGSB)
+		return 0;
+	if(p->to.type != D_REG || p->to.reg != REGSB)
+		return 0;
+	return 1;
+}
+
+int
+fninc(Sym *s)
+{
+	if(thumb){
+		if(s->thumb){
+			if(s->foreign)
+				return 8;
+			else
+				return 0;
+		}
+		else{
+			if(s->foreign)
+				return 0;
+			else
+				diag("T A !foreign in fninc");
+		}
+	}
+	else{
+		if(s->thumb){
+			if(s->foreign)
+				return 0;
+			else
+				diag("A T !foreign in fninc");
+		}
+		else{
+			if(s->foreign)
+				return 4;
+			else
+				return 0;
+		}			
+	}
+	return 0;
+}
+
+int 
+fnpinc(Sym *s)
+{
+	if(!s->fnptr){	// a simplified case BX O(R) -> BL O(R)
+		if(!debug['f'])
+			diag("fnptr == 0 in fnpinc");
+		if(s->foreign)
+			diag("bad usage in fnpinc %s %d %d %d", s->name, s->used, s->foreign, s->thumb);
+		return 0;
+	}
+	/* 0, 1, 2, 3 squared */
+	if(s->thumb)
+		return s->foreign ? 9 : 1;
+	else
+		return s->foreign ? 4 : 0;
+}
+
+static Prog *
+pad(Prog *p, int pc)
+{
+	Prog *q;
+
+	q = prg();
+	q->as = AMOVW;
+	q->line = p->line;
+	q->from.type = D_REG;
+	q->from.reg = REGSB;
+	q->to.type = D_REG;
+	q->to.reg = REGSB;
+	q->pc = pc;
+	q->link = p->link;
+	return q;
+}
+
+static int
+scan(Prog *op, Prog *p, int c)
+{
+	Prog *q;
+
+	for(q = op->link; q != p; q = q->link){
+		q->pc = c;
+		c += oplook(q)->size;
+		nocache(q);
+	}
+	return c;
+}
+
+/* size of a case statement including jump table */
+static long
+casesz(Prog *p)
+{
+	int jt = 0;
+	long n = 0;
+	Optab *o;
+
+	for( ; p != P; p = p->link){
+		if(p->as == ABCASE)
+			jt = 1;
+		else if(jt)
+			break;
+		o = oplook(p);
+		n += o->size;
+	}
+	return n;
+}
+
+void
+span(void)
+{
+	Prog *p, *op;
+	Sym *setext, *s;
+	Optab *o;
+	int m, bflag, i;
+	long c, otxt, v;
+	int lastthumb = -1;
+
+	if(debug['v'])
+		Bprint(&bso, "%5.2f span\n", cputime());
+	Bflush(&bso);
+
+	bflag = 0;
+	c = INITTEXT;
+	op = nil;
+	otxt = c;
+	for(p = firstp; p != P; op = p, p = p->link) {
+		setarch(p);
+		p->pc = c;
+		o = oplook(p);
+		m = o->size;
+		// must check literal pool here in case p generates many instructions
+		if(blitrl){
+			if(thumb && isbranch(p))
+				pool.extra += brextra(p);
+			if(checkpool(op, p->as == ACASE ? casesz(p) : m))
+				c = p->pc = scan(op, p, c);
+		}
+		if(m == 0) {
+			if(p->as == ATEXT) {
+				if(blitrl && lastthumb != -1 && lastthumb != thumb){	// flush literal pool
+					if(flushpool(op, 0, 1))
+						c = p->pc = scan(op, p, c);
+				}
+				lastthumb = thumb;
+				curtext = p;
+				autosize = p->to.offset + 4;
+				if(p->from.sym != S)
+					p->from.sym->value = c;
+				/* need passes to resolve branches */
+				if(c-otxt >= 1L<<17)
+					bflag = 1;
+				otxt = c;
+				if(thumb && blitrl)
+					pool.extra += brextra(p);
+				continue;
+			}
+			diag("zero-width instruction\n%P", p);
+			continue;
+		}
+		switch(o->flag & (LFROM|LTO|LPOOL)) {
+		case LFROM:
+			addpool(p, &p->from);
+			break;
+		case LTO:
+			addpool(p, &p->to);
+			break;
+		case LPOOL:
+			if ((p->scond&C_SCOND) == 14)
+				flushpool(p, 0, 0);
+			break;
+		}
+		if(p->as==AMOVW && p->to.type==D_REG && p->to.reg==REGPC && (p->scond&C_SCOND) == 14)
+			flushpool(p, 0, 0);
+		c += m;
+		if(blitrl && p->link == P){
+			if(thumb && isbranch(p))
+				pool.extra += brextra(p);
+			checkpool(p, 0);
+		}
+	}
+
+	/*
+	 * if any procedure is large enough to
+	 * generate a large SBRA branch, then
+	 * generate extra passes putting branches
+	 * around jmps to fix. this is rare.
+	 */
+	while(bflag) {
+		if(debug['v'])
+			Bprint(&bso, "%5.2f span1\n", cputime());
+		bflag = 0;
+		c = INITTEXT;
+		for(p = firstp; p != P; p = p->link) {
+			setarch(p);
+			p->pc = c;
+			if(thumb && isbranch(p))
+				nocache(p);
+			o = oplook(p);
+/* very larg branches
+			if(o->type == 6 && p->cond) {
+				otxt = p->cond->pc - c;
+				if(otxt < 0)
+					otxt = -otxt;
+				if(otxt >= (1L<<17) - 10) {
+					q = prg();
+					q->link = p->link;
+					p->link = q;
+					q->as = AB;
+					q->to.type = D_BRANCH;
+					q->cond = p->cond;
+					p->cond = q;
+					q = prg();
+					q->link = p->link;
+					p->link = q;
+					q->as = AB;
+					q->to.type = D_BRANCH;
+					q->cond = q->link->link;
+					bflag = 1;
+				}
+			}
+ */
+			m = o->size;
+			if(m == 0) {
+				if(p->as == ATEXT) {
+					curtext = p;
+					autosize = p->to.offset + 4;
+					if(p->from.sym != S)
+						p->from.sym->value = c;
+					continue;
+				}
+				diag("zero-width instruction\n%P", p);
+				continue;
+			}
+			c += m;
+		}
+	}
+
+	if(seenthumb){		// branch resolution
+		int passes = 0;
+		int lastc = 0;
+		int again;
+		Prog *oop;
+
+	loop:
+		passes++;
+		if(passes > 150){
+			diag("span looping !");
+			errorexit();
+		}
+		c = INITTEXT;
+		oop = op = nil;
+		again = 0;
+		for(p = firstp; p != P; oop = op, op = p, p = p->link){
+			setarch(p);
+			if(p->pc != c)
+				again = 1;
+			p->pc = c;
+			if(thumb && isbranch(p))
+				nocache(p);
+			o = oplook(p);
+			m = o->size;
+			if(passes == 1 && thumb && isbranch(p)){	// start conservative so unneeded alignment is not added
+				if(p->as == ABL)
+					m = 4;
+				else
+					m = 2;
+				p->align = 0;
+			}	
+			if(p->align){
+				if((p->align == 4 && (c&3)) || (p->align == 2 && !(c&3))){
+					if(ispad(op)){
+						oop->link = p;
+						op = oop;
+						c -= 2;
+						p->pc = c;
+					}
+					else{
+						op->link = pad(op, c);
+						op = op->link;
+						c += 2;
+						p->pc = c;
+					}
+					again = 1;
+				}
+			}
+			if(m == 0) {
+				if(p->as == ATEXT) {
+					curtext = p;
+					autosize = p->to.offset + 4;
+					if(p->from.sym != S)
+						p->from.sym->value = c;
+					continue;
+				}
+			}
+			c += m;
+		}
+		if(c != lastc || again){
+			lastc = c;
+			goto loop;
+		}
+	}
+
+	if(0 && seenthumb){		// rm redundant padding - obsolete
+		int d;
+
+		op = nil;
+		d = 0;
+		for(p = firstp; p != P; op = p, p = p->link){
+			p->pc -= d;
+			if(p->as == ATEXT){
+				if(p->from.sym != S)
+					p->from.sym->value -= d;
+// if(p->from.sym != S) print("%s %ux %d %d %d\n", p->from.sym->name ? p->from.sym->name : "?", p->from.sym->value, p->from.sym->thumb, p->from.sym->foreign, p->from.sym->fnptr);
+			}
+			if(ispad(p) && p->link != P && ispad(p->link)){
+				op->link = p->link->link;
+				d += 4;
+				p = op;
+			}
+		}
+		// print("%d bytes removed (padding)\n", d);
+		c -= d;
+	}
+	
+	if(debug['t']) {
+		/* 
+		 * add strings to text segment
+		 */
+		c = rnd(c, 8);
+		for(i=0; i<NHASH; i++)
+		for(s = hash[i]; s != S; s = s->link) {
+			if(s->type != SSTRING)
+				continue;
+			v = s->value;
+			while(v & 3)
+				v++;
+			s->value = c;
+			c += v;
+		}
+	}
+			
+	c = rnd(c, 8);
+
+	setext = lookup("etext", 0);
+	if(setext != S) {
+		setext->value = c;
+		textsize = c - INITTEXT;
+	}
+	if(INITRND)
+		INITDAT = rnd(c, INITRND);
+	if(debug['v'])
+		Bprint(&bso, "tsize = %lux\n", textsize);
+	Bflush(&bso);
+}
+
+/*
+ * when the first reference to the literal pool threatens
+ * to go out of range of a 12-bit PC-relative offset,
+ * drop the pool now, and branch round it.
+ * this happens only in extended basic blocks that exceed 4k.
+ */
+int
+checkpool(Prog *p, int sz)
+{
+	if(thumb){
+		if(pool.size >= 0x3fc || (p->pc+sz+pool.extra+2+2)+(pool.size-4)-pool.start-4 >= 0x3fc)
+			return flushpool(p, 1, 0);
+		else if(p->link == P)
+			return flushpool(p, 2, 0);
+		return 0;
+	}
+	if(pool.size >= 0xffc || immaddr((p->pc+sz+4)+4+pool.size - pool.start+8) == 0)
+		return flushpool(p, 1, 0);
+	else if(p->link == P)
+		return flushpool(p, 2, 0);
+	return 0;
+}
+
+int
+flushpool(Prog *p, int skip, int force)
+{
+	Prog *q;
+
+	if(blitrl) {
+		if(skip){
+			if(0 && skip==1)print("note: flush literal pool at %lux: len=%lud ref=%lux\n", p->pc+4, pool.size, pool.start);
+			q = prg();
+			q->as = AB;
+			q->to.type = D_BRANCH;
+			q->cond = p->link;
+			q->link = blitrl;
+			blitrl = q;
+		}
+		else if(!force && (p->pc+pool.size-pool.start < (thumb ? 0x3fc+4-pool.extra : 2048)))
+			return 0;
+		elitrl->link = p->link;
+		p->link = blitrl;
+		blitrl = 0;	/* BUG: should refer back to values until out-of-range */
+		elitrl = 0;
+		pool.size = 0;
+		pool.start = 0;
+		pool.extra = 0;
+		return 1;
+	}
+	return 0;
+}
+
+void
+addpool(Prog *p, Adr *a)
+{
+	Prog *q, t;
+	int c;
+
+	if(thumb)
+		c = thumbaclass(a, p);
+	else
+		c = aclass(a);
+
+	t = zprg;
+	t.as = AWORD;
+
+	switch(c) {
+	default:
+		t.to = *a;
+		break;
+
+	case	C_SROREG:
+	case C_LOREG:
+	case C_ROREG:
+	case C_FOREG:
+	case C_SOREG:
+	case C_HOREG:
+	case C_GOREG:
+	case C_FAUTO:
+	case C_SAUTO:
+	case C_LAUTO:
+	case C_LACON:
+	case C_GACON:
+		t.to.type = D_CONST;
+		t.to.offset = instoffset;
+		break;
+	}
+
+	for(q = blitrl; q != P; q = q->link)	/* could hash on t.t0.offset */
+		if(memcmp(&q->to, &t.to, sizeof(t.to)) == 0) {
+			p->cond = q;
+			return;
+		}
+
+	q = prg();
+	*q = t;
+	q->pc = pool.size;
+
+	if(blitrl == P) {
+		blitrl = q;
+		pool.start = p->pc;
+		q->align = 4;
+	} else
+		elitrl->link = q;
+	elitrl = q;
+	pool.size += 4;
+
+	p->cond = q;
+}
+
+void
+xdefine(char *p, int t, long v)
+{
+	Sym *s;
+
+	s = lookup(p, 0);
+	if(s->type == 0 || s->type == SXREF) {
+		s->type = t;
+		s->value = v;
+	}
+}
+
+long
+regoff(Adr *a)
+{
+
+	instoffset = 0;
+	aclass(a);
+	return instoffset;
+}
+
+long
+immrot(ulong v)
+{
+	int i;
+
+	for(i=0; i<16; i++) {
+		if((v & ~0xff) == 0)
+			return (i<<8) | v | (1<<25);
+		v = (v<<2) | (v>>30);
+	}
+	return 0;
+}
+
+long
+immaddr(long v)
+{
+	if(v >= 0 && v <= 0xfff)
+		return (v & 0xfff) |
+			(1<<24) |	/* pre indexing */
+			(1<<23);	/* pre indexing, up */
+	if(v >= -0xfff && v < 0)
+		return (-v & 0xfff) |
+			(1<<24);	/* pre indexing */
+	return 0;
+}
+
+int
+immfloat(long v)
+{
+	return (v & 0xC03) == 0;	/* offset will fit in floating-point load/store */
+}
+
+int
+immhalf(long v)
+{
+	if(v >= 0 && v <= 0xff)
+		return v|
+			(1<<24)|	/* pre indexing */
+			(1<<23);	/* pre indexing, up */
+	if(v >= -0xff && v < 0)
+		return (-v & 0xff)|
+			(1<<24);	/* pre indexing */
+	return 0;
+}
+
+int
+aclass(Adr *a)
+{
+	Sym *s;
+	int t;
+
+	switch(a->type) {
+	case D_NONE:
+		return C_NONE;
+
+	case D_REG:
+		return C_REG;
+
+	case D_REGREG:
+		return C_REGREG;
+
+	case D_SHIFT:
+		return C_SHIFT;
+
+	case D_FREG:
+		return C_FREG;
+
+	case D_FPCR:
+		return C_FCR;
+
+	case D_OREG:
+		switch(a->name) {
+		case D_EXTERN:
+		case D_STATIC:
+			if(a->sym == 0 || a->sym->name == 0) {
+				print("null sym external\n");
+				print("%D\n", a);
+				return C_GOK;
+			}
+			s = a->sym;
+			t = s->type;
+			if(t == 0 || t == SXREF) {
+				diag("undefined external: %s in %s",
+					s->name, TNAME);
+				s->type = SDATA;
+			}
+			if(dlm) {
+				switch(t) {
+				default:
+					instoffset = s->value + a->offset + INITDAT;
+					break;
+				case SUNDEF:
+				case STEXT:
+				case SCONST:
+				case SLEAF:
+				case SSTRING:
+					instoffset = s->value + a->offset;
+					break;
+				}
+				return C_ADDR;
+			}
+			instoffset = s->value + a->offset - BIG;
+			t = immaddr(instoffset);
+			if(t) {
+				if(immhalf(instoffset))
+					return immfloat(t) ? C_HFEXT : C_HEXT;
+				if(immfloat(t))
+					return C_FEXT;
+				return C_SEXT;
+			}
+			return C_LEXT;
+		case D_AUTO:
+			instoffset = autosize + a->offset;
+			t = immaddr(instoffset);
+			if(t){
+				if(immhalf(instoffset))
+					return immfloat(t) ? C_HFAUTO : C_HAUTO;
+				if(immfloat(t))
+					return C_FAUTO;
+				return C_SAUTO;
+			}
+			return C_LAUTO;
+
+		case D_PARAM:
+			instoffset = autosize + a->offset + 4L;
+			t = immaddr(instoffset);
+			if(t){
+				if(immhalf(instoffset))
+					return immfloat(t) ? C_HFAUTO : C_HAUTO;
+				if(immfloat(t))
+					return C_FAUTO;
+				return C_SAUTO;
+			}
+			return C_LAUTO;
+		case D_NONE:
+			instoffset = a->offset;
+			t = immaddr(instoffset);
+			if(t) {
+				if(immhalf(instoffset))		 /* n.b. that it will also satisfy immrot */
+					return immfloat(t) ? C_HFOREG : C_HOREG;
+				if(immfloat(t))
+					return C_FOREG; /* n.b. that it will also satisfy immrot */
+				t = immrot(instoffset);
+				if(t)
+					return C_SROREG;
+				if(immhalf(instoffset))
+					return C_HOREG;
+				return C_SOREG;
+			}
+			t = immrot(instoffset);
+			if(t)
+				return C_ROREG;
+			return C_LOREG;
+		}
+		return C_GOK;
+
+	case D_PSR:
+		return C_PSR;
+
+	case D_OCONST:
+		switch(a->name) {
+		case D_EXTERN:
+		case D_STATIC:
+			s = a->sym;
+			t = s->type;
+			if(t == 0 || t == SXREF) {
+				diag("undefined external: %s in %s",
+					s->name, TNAME);
+				s->type = SDATA;
+			}
+			instoffset = s->value + a->offset + INITDAT;
+			if(s->type == STEXT || s->type == SLEAF || s->type == SUNDEF) {
+				instoffset = s->value + a->offset;
+#ifdef CALLEEBX
+				instoffset += fnpinc(s);
+#else
+				if(s->thumb)
+					instoffset++;	// T bit
+#endif
+				return C_LCON;
+			}
+			return C_LCON;
+		}
+		return C_GOK;
+
+	case D_FCONST:
+		return C_FCON;
+
+	case D_CONST:
+		switch(a->name) {
+
+		case D_NONE:
+			instoffset = a->offset;
+			if(a->reg != NREG)
+				goto aconsize;
+
+			t = immrot(instoffset);
+			if(t)
+				return C_RCON;
+			t = immrot(~instoffset);
+			if(t)
+				return C_NCON;
+			return C_LCON;
+
+		case D_EXTERN:
+		case D_STATIC:
+			s = a->sym;
+			if(s == S)
+				break;
+			t = s->type;
+			switch(t) {
+			case 0:
+			case SXREF:
+				diag("undefined external: %s in %s",
+					s->name, TNAME);
+				s->type = SDATA;
+				break;
+			case SUNDEF:
+			case STEXT:
+			case SSTRING:
+			case SCONST:
+			case SLEAF:
+				instoffset = s->value + a->offset;
+#ifdef CALLEEBX
+				instoffset += fnpinc(s);
+#else
+				if(s->thumb)
+					instoffset++;	// T bit
+#endif
+				return C_LCON;
+			}
+			if(!dlm) {
+				instoffset = s->value + a->offset - BIG;
+				t = immrot(instoffset);
+				if(t && instoffset != 0)
+					return C_RECON;
+			}
+			instoffset = s->value + a->offset + INITDAT;
+			return C_LCON;
+
+		case D_AUTO:
+			instoffset = autosize + a->offset;
+			goto aconsize;
+
+		case D_PARAM:
+			instoffset = autosize + a->offset + 4L;
+		aconsize:
+			t = immrot(instoffset);
+			if(t)
+				return C_RACON;
+			return C_LACON;
+		}
+		return C_GOK;
+
+	case D_BRANCH:
+		return C_SBRA;
+	}
+	return C_GOK;
+}
+
+Optab*
+oplook(Prog *p)
+{
+	int a1, a2, a3, r;
+	char *c1, *c3;
+	Optab *o, *e;
+	Optab *otab;
+	Oprang *orange;
+
+	if(thumb){
+		otab = thumboptab;
+		orange = thumboprange;
+	}
+	else{
+		otab = optab;
+		orange = oprange;
+	}
+	a1 = p->optab;
+	if(a1)
+		return otab+(a1-1);
+	a1 = p->from.class;
+	if(a1 == 0) {
+		if(thumb)
+			a1 = thumbaclass(&p->from, p) + 1;
+		else
+			a1 = aclass(&p->from) + 1;
+		p->from.class = a1;
+	}
+	a1--;
+	a3 = p->to.class;
+	if(a3 == 0) {
+		if(thumb)
+			a3 = thumbaclass(&p->to, p) + 1;
+		else
+			a3 = aclass(&p->to) + 1;
+		p->to.class = a3;
+	}
+	a3--;
+	a2 = C_NONE;
+	if(p->reg != NREG)
+		a2 = C_REG;
+	r = p->as;
+	o = orange[r].start;
+	if(o == 0) {
+		a1 = opcross[repop[r]][a1][a2][a3];
+		if(a1) {
+			p->optab = a1+1;
+			return otab+a1;
+		}
+		o = orange[r].stop; /* just generate an error */
+	}
+	if(0) {
+		print("oplook %A %d %d %d\n",
+			(int)p->as, a1, a2, a3);
+		print("		%d %d\n", p->from.type, p->to.type);
+	}
+	e = orange[r].stop;
+	c1 = xcmp[a1];
+	c3 = xcmp[a3];
+	for(; o<e; o++)
+		if(o->a2 == a2)
+		if(c1[o->a1])
+		if(c3[o->a3]) {
+			p->optab = (o-otab)+1;
+			return o;
+		}
+	diag("illegal combination %A %d %d %d",
+		p->as, a1, a2, a3);
+	prasm(p);
+	if(o == 0)
+		o = otab;
+	return o;
+}
+
+int
+cmp(int a, int b)
+{
+
+	if(a == b)
+		return 1;
+	switch(a) {
+	case C_LCON:
+		if(b == C_RCON || b == C_NCON)
+			return 1;
+		break;
+	case C_LACON:
+		if(b == C_RACON)
+			return 1;
+		break;
+	case C_LECON:
+		if(b == C_RECON)
+			return 1;
+		break;
+
+	case C_HFEXT:
+		return b == C_HEXT || b == C_FEXT;
+	case C_FEXT:
+	case C_HEXT:
+		return b == C_HFEXT;
+	case C_SEXT:
+		return cmp(C_HFEXT, b);
+	case C_LEXT:
+		return cmp(C_SEXT, b);
+
+	case C_HFAUTO:
+		return b == C_HAUTO || b == C_FAUTO;
+	case C_FAUTO:
+	case C_HAUTO:
+		return b == C_HFAUTO;
+	case C_SAUTO:
+		return cmp(C_HFAUTO, b);
+	case C_LAUTO:
+		return cmp(C_SAUTO, b);
+
+	case C_HFOREG:
+		return b == C_HOREG || b == C_FOREG;
+	case C_FOREG:
+	case C_HOREG:
+		return b == C_HFOREG;
+	case C_SROREG:
+		return cmp(C_SOREG, b) || cmp(C_ROREG, b);
+	case C_SOREG:
+	case C_ROREG:
+		return b == C_SROREG || cmp(C_HFOREG, b);
+	case C_LOREG:
+		return cmp(C_SROREG, b);
+
+	case C_LBRA:
+		if(b == C_SBRA)
+			return 1;
+		break;
+	case C_GBRA:
+		if(b == C_SBRA || b == C_LBRA)
+			return 1;
+
+	case C_HREG:
+		return cmp(C_SP, b) || cmp(C_PC, b);
+
+	}
+	return 0;
+}
+
+int
+ocmp(void *a1, void *a2)
+{
+	Optab *p1, *p2;
+	int n;
+
+	p1 = (Optab*)a1;
+	p2 = (Optab*)a2;
+	n = p1->as - p2->as;
+	if(n)
+		return n;
+	n = (p2->flag&V4) - (p1->flag&V4);	/* architecture version */
+	if(n)
+		return n;
+	n = p1->a1 - p2->a1;
+	if(n)
+		return n;
+	n = p1->a2 - p2->a2;
+	if(n)
+		return n;
+	n = p1->a3 - p2->a3;
+	if(n)
+		return n;
+	return 0;
+}
+
+void
+buildop(void)
+{
+	int i, n, r;
+
+	armv4 = !debug['h'];
+	for(i=0; i<C_GOK; i++)
+		for(n=0; n<C_GOK; n++)
+			xcmp[i][n] = cmp(n, i);
+	for(n=0; optab[n].as != AXXX; n++)
+		if((optab[n].flag & V4) && !armv4) {
+			optab[n].as = AXXX;
+			break;
+		}
+	qsort(optab, n, sizeof(optab[0]), ocmp);
+	for(i=0; i<n; i++) {
+		r = optab[i].as;
+		oprange[r].start = optab+i;
+		while(optab[i].as == r)
+			i++;
+		oprange[r].stop = optab+i;
+		i--;
+
+		switch(r)
+		{
+		default:
+			diag("unknown op in build: %A", r);
+			errorexit();
+		case AADD:
+			oprange[AAND] = oprange[r];
+			oprange[AEOR] = oprange[r];
+			oprange[ASUB] = oprange[r];
+			oprange[ARSB] = oprange[r];
+			oprange[AADC] = oprange[r];
+			oprange[ASBC] = oprange[r];
+			oprange[ARSC] = oprange[r];
+			oprange[AORR] = oprange[r];
+			oprange[ABIC] = oprange[r];
+			break;
+		case ACMP:
+			oprange[ATST] = oprange[r];
+			oprange[ATEQ] = oprange[r];
+			oprange[ACMN] = oprange[r];
+			break;
+		case AMVN:
+			break;
+		case ABEQ:
+			oprange[ABNE] = oprange[r];
+			oprange[ABCS] = oprange[r];
+			oprange[ABHS] = oprange[r];
+			oprange[ABCC] = oprange[r];
+			oprange[ABLO] = oprange[r];
+			oprange[ABMI] = oprange[r];
+			oprange[ABPL] = oprange[r];
+			oprange[ABVS] = oprange[r];
+			oprange[ABVC] = oprange[r];
+			oprange[ABHI] = oprange[r];
+			oprange[ABLS] = oprange[r];
+			oprange[ABGE] = oprange[r];
+			oprange[ABLT] = oprange[r];
+			oprange[ABGT] = oprange[r];
+			oprange[ABLE] = oprange[r];
+			break;
+		case ASLL:
+			oprange[ASRL] = oprange[r];
+			oprange[ASRA] = oprange[r];
+			break;
+		case AMUL:
+			oprange[AMULU] = oprange[r];
+			break;
+		case ADIV:
+			oprange[AMOD] = oprange[r];
+			oprange[AMODU] = oprange[r];
+			oprange[ADIVU] = oprange[r];
+			break;
+		case AMOVW:
+		case AMOVB:
+		case AMOVBU:
+		case AMOVH:
+		case AMOVHU:
+			break;
+		case ASWPW:
+			oprange[ASWPBU] = oprange[r];
+			break;
+		case AB:
+		case ABL:
+		case ABX:
+		case ABXRET:
+		case ASWI:
+		case AWORD:
+		case AMOVM:
+		case ARFE:
+		case ATEXT:
+		case ACASE:
+		case ABCASE:
+			break;
+		case AADDF:
+			oprange[AADDD] = oprange[r];
+			oprange[ASUBF] = oprange[r];
+			oprange[ASUBD] = oprange[r];
+			oprange[AMULF] = oprange[r];
+			oprange[AMULD] = oprange[r];
+			oprange[ADIVF] = oprange[r];
+			oprange[ADIVD] = oprange[r];
+			oprange[AMOVFD] = oprange[r];
+			oprange[AMOVDF] = oprange[r];
+			break;
+			
+		case ACMPF:
+			oprange[ACMPD] = oprange[r];
+			break;
+
+		case AMOVF:
+			oprange[AMOVD] = oprange[r];
+			break;
+
+		case AMOVFW:
+			oprange[AMOVWF] = oprange[r];
+			oprange[AMOVWD] = oprange[r];
+			oprange[AMOVDW] = oprange[r];
+			break;
+
+		case AMULL:
+			oprange[AMULA] = oprange[r];
+			oprange[AMULAL] = oprange[r];
+			oprange[AMULLU] = oprange[r];
+			oprange[AMULALU] = oprange[r];
+			break;
+		}
+	}
+}
+
+/*
+void
+buildrep(int x, int as)
+{
+	Opcross *p;
+	Optab *e, *s, *o;
+	int a1, a2, a3, n;
+
+	if(C_NONE != 0 || C_REG != 1 || C_GOK >= 32 || x >= nelem(opcross)) {
+		diag("assumptions fail in buildrep");
+		errorexit();
+	}
+	repop[as] = x;
+	p = (opcross + x);
+	s = oprange[as].start;
+	e = oprange[as].stop;
+	for(o=e-1; o>=s; o--) {
+		n = o-optab;
+		for(a2=0; a2<2; a2++) {
+			if(a2) {
+				if(o->a2 == C_NONE)
+					continue;
+			} else
+				if(o->a2 != C_NONE)
+					continue;
+			for(a1=0; a1<32; a1++) {
+				if(!xcmp[a1][o->a1])
+					continue;
+				for(a3=0; a3<32; a3++)
+					if(xcmp[a3][o->a3])
+						(*p)[a1][a2][a3] = n;
+			}
+		}
+	}
+	oprange[as].start = 0;
+}
+*/
+
+enum{
+	ABSD = 0,
+	ABSU = 1,
+	RELD = 2,
+	RELU = 3,
+};
+
+int modemap[4] = { 0, 1, -1, 2, };
+
+typedef struct Reloc Reloc;
+
+struct Reloc
+{
+	int n;
+	int t;
+	uchar *m;
+	ulong *a;
+};
+
+Reloc rels;
+
+static void
+grow(Reloc *r)
+{
+	int t;
+	uchar *m, *nm;
+	ulong *a, *na;
+
+	t = r->t;
+	r->t += 64;
+	m = r->m;
+	a = r->a;
+	r->m = nm = malloc(r->t*sizeof(uchar));
+	r->a = na = malloc(r->t*sizeof(ulong));
+	memmove(nm, m, t*sizeof(uchar));
+	memmove(na, a, t*sizeof(ulong));
+	free(m);
+	free(a);
+}
+
+void
+dynreloc(Sym *s, long v, int abs)
+{
+	int i, k, n;
+	uchar *m;
+	ulong *a;
+	Reloc *r;
+
+	if(v&3)
+		diag("bad relocation address");
+	v >>= 2;
+	if(s != S && s->type == SUNDEF)
+		k = abs ? ABSU : RELU;
+	else
+		k = abs ? ABSD : RELD;
+	/* Bprint(&bso, "R %s a=%ld(%lx) %d\n", s->name, a, a, k); */
+	k = modemap[k];
+	r = &rels;
+	n = r->n;
+	if(n >= r->t)
+		grow(r);
+	m = r->m;
+	a = r->a;
+	for(i = n; i > 0; i--){
+		if(v < a[i-1]){	/* happens occasionally for data */
+			m[i] = m[i-1];
+			a[i] = a[i-1];
+		}
+		else
+			break;
+	}
+	m[i] = k;
+	a[i] = v;
+	r->n++;
+}
+
+static int
+sput(char *s)
+{
+	char *p;
+
+	p = s;
+	while(*s)
+		cput(*s++);
+	cput(0);
+	return  s-p+1;
+}
+
+void
+asmdyn()
+{
+	int i, n, t, c;
+	Sym *s;
+	ulong la, ra, *a;
+	vlong off;
+	uchar *m;
+	Reloc *r;
+
+	cflush();
+	off = seek(cout, 0, 1);
+	lput(0);
+	t = 0;
+	lput(imports);
+	t += 4;
+	for(i = 0; i < NHASH; i++)
+		for(s = hash[i]; s != S; s = s->link)
+			if(s->type == SUNDEF){
+				lput(s->sig);
+				t += 4;
+				t += sput(s->name);
+			}
+	
+	la = 0;
+	r = &rels;
+	n = r->n;
+	m = r->m;
+	a = r->a;
+	lput(n);
+	t += 4;
+	for(i = 0; i < n; i++){
+		ra = *a-la;
+		if(*a < la)
+			diag("bad relocation order");
+		if(ra < 256)
+			c = 0;
+		else if(ra < 65536)
+			c = 1;
+		else
+			c = 2;
+		cput((c<<6)|*m++);
+		t++;
+		if(c == 0){
+			cput(ra);
+			t++;
+		}
+		else if(c == 1){
+			wput(ra);
+			t += 2;
+		}
+		else{
+			lput(ra);
+			t += 4;
+		}
+		la = *a++;
+	}
+
+	cflush();
+	seek(cout, off, 0);
+	lput(t);
+
+	if(debug['v']){
+		Bprint(&bso, "import table entries = %d\n", imports);
+		Bprint(&bso, "export table entries = %d\n", exports);
+	}
+}
diff --git a/sys/src/cmd/tl/thumb.c b/sys/src/cmd/tl/thumb.c
new file mode 100644
index 000000000..f16175ea5
--- /dev/null
+++ b/sys/src/cmd/tl/thumb.c
@@ -0,0 +1,1636 @@
+#include "l.h"
+
+static long thumboprr(int);
+static long thumboprrr(int, int);
+static long thumbopirr(int , int);
+static long thumbopri(int);
+static long thumbophh(int);
+static long thumbopbra(int);
+static long thumbopmv(int, int);
+static void lowreg(Prog *, int);
+static void mult(Prog *, int, int);
+static void numr(Prog *, int, int, int);
+static void regis(Prog *, int, int, int);
+static void dis(int, int);
+
+// build a constant using neg, add and shift - only worth it if < 6 bytes */
+static int
+immbuildcon(int c, Prog *p)
+{
+	int n = 0;
+
+	USED(p);
+	if(c >= 0 && c <= 255)
+		return 0;			// mv
+	if(c >= -255 && c < 0)	// mv, neg
+		return 1;
+	if(c >= 256 && c <= 510)	// mv, add
+		return 1;
+	if(c < 0)
+		return 0;
+	while(!(c & 1)){
+		n++;
+		c >>= 1;
+	}
+	if(c >= 0 && c <= 255)	// mv, lsl
+		return 1;
+	return 0;
+}
+
+// positive 5 bit offset from register - O(R)
+// positive 8 bit offset from register - mov O, R then [R, R]
+// otherwise O goes in literal pool - mov O1(PC), R then [R, R]
+static int
+immoreg(int off, Prog *p)
+{
+	int v = 1;
+	int as = p->as;
+
+	if(off < 0)
+		return C_GOREG;
+	if(as == AMOVW)
+		v = 4;
+	else if(as == AMOVH || as == AMOVHU)
+		v = 2;
+	else if(as == AMOVB || as == AMOVBU)
+		v = 1;
+	else
+		diag("bad op in immoreg");
+	if(off/v <= 31)
+		return C_SOREG;
+	if(off <= 255)
+		return C_LOREG;
+	return C_GOREG;
+}
+
+// positive 8 bit - mov O, R then 0(R)
+// otherwise O goes in literal pool - mov O1(PC), R then 0(R)
+static int
+immacon(int off, Prog *p, int t1, int t2)
+{
+	USED(p);
+	if(off < 0)
+		return t2;
+	if(off <= 255)
+		return t1;
+	return t2;
+}
+
+// unsigned 8 bit in words
+static int
+immauto(int off, Prog *p)
+{
+	if(p->as != AMOVW)
+		diag("bad op in immauto");
+	mult(p, off, 4);
+	if(off >= 0 && off <= 1020)
+		return C_SAUTO;
+	return C_LAUTO;
+}
+
+static int
+immsmall(int off, Prog *p, int t1, int t2, int t3)
+{
+	USED(p);
+	if(off >= 0 && off <= 7)
+		return t1;
+	if(off >= 0 && off <= 255)
+		return t2;
+	return t3;
+}
+
+static int
+immcon(int off, Prog *p)
+{
+	int as = p->as;
+
+	if(as == ASLL || as == ASRL || as == ASRA)
+		return C_SCON;
+	if(p->to.type == D_REG && p->to.reg == REGSP){
+		if(as == AADD || as == ASUB){
+			if(off >= 0 && off <= 508)
+				return C_SCON;
+			if(as == ASUB){
+				p->as = AADD;
+				p->from.offset = -p->from.offset;
+			}
+			return C_LCON;
+		}
+		diag("unknown type in immcon");
+	}
+	if(as == AADD || as == ASUB){
+		if(p->reg != NREG)
+			return immsmall(off, p, C_SCON, C_LCON, C_GCON);
+		return immacon(off, p, C_SCON, C_LCON);
+	}
+	if(as == AMOVW && p->from.type == D_CONST && p->to.type == D_REG && immbuildcon(off, p))
+		return C_BCON;
+	if(as == ACMP && p->from.type == D_CONST && immbuildcon(off, p))
+		return C_BCON;
+	if(as == ACMP || as == AMOVW)
+		return immacon(off, p, C_SCON, C_LCON);
+	return C_LCON;
+}
+
+int
+thumbaclass(Adr *a, Prog *p)
+{
+	Sym *s;
+	int t;
+
+	switch(a->type) {
+	case D_NONE:
+		return C_NONE;
+	case D_REG:
+		if(a->reg == REGSP)
+			return C_SP;
+		if(a->reg == REGPC)
+			return C_PC;
+		if(a->reg >= 8)
+			return C_HREG;
+		return C_REG;
+	case D_SHIFT:
+		diag("D_SHIFT in thumbaclass");
+		return C_SHIFT;
+	case D_FREG:
+		diag("D_FREG in thumbaclass");
+		return C_FREG;
+	case D_FPCR:
+		diag("D_FPCR in thumbaclass");
+		return C_FCR;
+	case D_OREG:
+		switch(a->name) {
+		case D_EXTERN:
+		case D_STATIC:
+			if(a->sym == 0 || a->sym->name == 0) {
+				print("null sym external\n");
+				print("%D\n", a);
+				return C_GOK;
+			}
+			t = a->sym->type;
+			if(t == 0 || t == SXREF) {
+				diag("undefined external: %s in %s\n",
+					a->sym->name, TNAME);
+				a->sym->type = SDATA;
+			}
+			instoffset = a->sym->value + a->offset + INITDAT;
+			return C_LEXT;	/* INITDAT unknown at this stage */
+			// return immacon(instoffset, p, C_SEXT, C_LEXT);
+		case D_AUTO:
+			instoffset = autosize + a->offset;
+			return immauto(instoffset, p);
+		case D_PARAM:
+			instoffset = autosize + a->offset + 4L;
+// print("D_PARAM %s %d+%d+%d = %d\n", a->sym != S ? a->sym->name : "noname", autosize, a->offset, 4, autosize+a->offset+4);
+			return immauto(instoffset, p);
+		case D_NONE:
+			instoffset = a->offset;
+			if(a->reg == REGSP)
+				return immauto(instoffset, p);
+			else
+				return immoreg(instoffset, p);
+		}
+		return C_GOK;
+	case D_PSR:
+		diag("D_PSR in thumbaclass");
+		return C_PSR;
+	case D_OCONST:
+		switch(a->name) {
+		case D_EXTERN:
+		case D_STATIC:
+			s = a->sym;
+			t = s->type;
+			if(t == 0 || t == SXREF) {
+				diag("undefined external: %s in %s\n",
+					s->name, TNAME);
+				s->type = SDATA;
+			}
+			instoffset = s->value + a->offset + INITDAT;
+			if(s->type == STEXT || s->type == SLEAF){
+				instoffset = s->value + a->offset;
+#ifdef CALLEEBX
+				instoffset += fnpinc(s);
+#else
+				if(s->thumb)
+					instoffset++;	// T bit
+#endif
+				return C_LCON;
+			}
+			return C_LCON;	/* INITDAT unknown at this stage */
+			// return immcon(instoffset, p);
+		}
+		return C_GOK;
+	case D_FCONST:
+		diag("D_FCONST in thumaclass");
+		return C_FCON;
+	case D_CONST:
+		switch(a->name) {
+		case D_NONE:
+			instoffset = a->offset;
+			if(a->reg != NREG)
+				goto aconsize;
+			return immcon(instoffset, p);
+		case D_EXTERN:
+		case D_STATIC:
+			s = a->sym;
+			if(s == S)
+				break;
+			t = s->type;
+			switch(t) {
+			case 0:
+			case SXREF:
+				diag("undefined external: %s in %s\n",
+					s->name, TNAME);
+				s->type = SDATA;
+				break;
+			case SCONST:
+			case STEXT:
+			case SLEAF:
+				instoffset = s->value + a->offset;
+#ifdef CALLEEBX
+				instoffset += fnpinc(s);
+#else
+				if(s->thumb)
+					instoffset++;	// T bit
+#endif
+				return C_LCON;
+			}
+			instoffset = s->value + a->offset + INITDAT;
+			return C_LCON;	/* INITDAT unknown at this stage */
+			// return immcon(instoffset, p);
+		case D_AUTO:
+			instoffset = autosize + a->offset;
+			goto aconsize;
+		case D_PARAM:
+			instoffset = autosize + a->offset + 4L;
+		aconsize:
+			if(p->from.reg == REGSP || p->from.reg == NREG)
+				return instoffset >= 0 && instoffset < 1024 ? C_SACON : C_GACON;
+			else if(p->from.reg == p->to.reg)
+				return immacon(instoffset, p, C_SACON, C_GACON);
+			return immsmall(instoffset, p, C_SACON, C_LACON, C_GACON);
+		}
+		return C_GOK;
+	case D_BRANCH: {
+		int v, va;
+
+		p->align = 0;
+		v = -4;
+		va = 0;
+		if(p->cond != P){
+			v = (p->cond->pc - p->pc) - 4;
+			va = p->cond->pc;
+		}
+		instoffset = v;
+		if(p->as == AB){
+			if(v >= -2048 && v <= 2046)
+				return C_SBRA;
+			p->align = 4;
+			instoffset = va;
+			return C_LBRA;
+		}
+		if(p->as == ABL){
+#ifdef CALLEEBX
+			int e;
+
+			if((e = fninc(p->to.sym))) {
+				v += e;
+				va += e;
+				instoffset += e;
+			}		
+#endif
+			if(v >= -4194304 && v <= 4194302)
+				return C_SBRA;
+			p->align = 2;
+			instoffset = va;
+			return C_LBRA;
+		}
+		if(p->as == ABX){
+			v = va;
+			if(v >= 0 && v <= 255)
+				return C_SBRA;
+			p->align = 2;
+			instoffset = va;
+			return C_LBRA;
+		}
+		if(v >= -256 && v <= 254)
+			return C_SBRA;
+		if(v >= -(2048-2) && v <= (2046+2))
+			return C_LBRA;
+		p->align = 2;
+		instoffset = va;
+		return C_GBRA;
+	}
+	}
+	return C_GOK;
+}
+
+// as a1 a2 a3 type size param lit vers
+Optab thumboptab[] =
+{
+	{ ATEXT,		C_LEXT,		C_NONE,		C_LCON,		0,	0,	0 },
+	{ ATEXT,		C_LEXT,		C_REG,		C_LCON,		0,	0,	0 },
+	{ AMVN,		C_REG,		C_NONE,		C_REG,		1,	2,	0 },
+	{ ASRL,		C_REG,		C_NONE,		C_REG,		1,	2,	0 },
+	{ ACMP,		C_REG,		C_REG,		C_NONE,		1,	2,	0 },
+	{ ACMN,		C_REG,		C_REG,		C_NONE,		1,	2,	0 },
+	{ AADD,		C_REG,		C_REG,		C_REG,		2,	2,	0 },
+	{ AADD,		C_REG,		C_NONE,		C_REG,		2,	2,	0 },
+	{ AADD,		C_SCON,		C_REG,		C_REG,		3,	2,	0 },
+	{ AADD,		C_LCON,		C_REG,		C_REG,		49,	4,	0 },
+	{ AADD,		C_GCON,		C_REG,		C_REG,		36,	4,	0,	LFROM },
+	// { AADD,		C_LCON,		C_NONE,		C_REG,		3,	2,	0,	LFROM },
+	{ ASRL,		C_SCON,		C_REG,		C_REG,		4,	2,	0 },
+	{ ASRL,		C_SCON,		C_NONE,		C_REG,		4,	2,	0 },
+	{ AADD,		C_SCON,		C_NONE,		C_REG,		5,	2,	0 },
+	{ AADD,		C_LCON,		C_NONE,		C_REG,		37,	4,	0,	LFROM },
+	{ ACMP,		C_SCON,		C_REG,		C_NONE,		5,	2,	0 },
+	{ ACMP,		C_BCON,		C_REG,		C_NONE,		48,	6,	0 },
+	{ ACMP,		C_LCON,		C_REG,		C_NONE,		39,	4,	0,	LFROM },
+	{ AMOVW,		C_SCON,		C_NONE,		C_REG,		5,	2,	0 },
+	{ AMOVW,		C_BCON,		C_NONE,		C_REG,		47,	4,	0 },
+	{ AMOVW,		C_LCON,		C_NONE,		C_REG,		38,	2,	0,	LFROM },
+	// { AADD,		C_LCON,		C_PC,		C_REG,		6,	2,	0,	LFROM },
+	// { AADD,		C_LCON,		C_SP,		C_REG,		6,	2,	0,	LFROM },
+	{ AADD,		C_SCON,		C_NONE,		C_SP,		7,	2,	0 },
+	{ AADD,		C_LCON,		C_NONE,		C_SP,		40,	4,	0,	LFROM },
+	{ AADD,		C_REG,		C_NONE,		C_HREG,		8,	2,	0 },
+	{ AADD,		C_HREG,		C_NONE,		C_REG,		8,	2,	0 },
+	{ AADD,		C_HREG,		C_NONE,		C_HREG,		8,	2,	0 },
+	{ AMOVW,		C_REG,		C_NONE,		C_HREG,		8,	2,	0 },
+	{ AMOVW,		C_HREG,		C_NONE,		C_REG,		8,	2,	0 },
+	{ AMOVW,		C_HREG,		C_NONE,		C_HREG,		8,	2,	0 },
+	{ ACMP,		C_REG,		C_HREG,		C_NONE,		8,	2,	0 },
+	{ ACMP,		C_HREG,		C_REG,		C_NONE,		8,	2,	0 },
+	{ ACMP,		C_HREG,		C_HREG,		C_NONE,		8,	2,	0 },
+	{ AB,			C_NONE,		C_NONE,		C_SBRA,		9,	2,	0,	LPOOL },
+	{ ABEQ,		C_NONE,		C_NONE,		C_SBRA,		10,	2,	0 },
+	{ ABL,		C_NONE,		C_NONE,		C_SBRA,		11,	4,	0 },
+	{ ABX,		C_NONE,		C_NONE,		C_SBRA,		12,	10,	0 },
+	{ AB,			C_NONE,		C_NONE,		C_LBRA,		41,	8,	0,	LPOOL },
+	{ ABEQ,		C_NONE,		C_NONE,		C_LBRA,		46,	4,	0 },
+	{ ABL,		C_NONE,		C_NONE,		C_LBRA,		43,	14,	0 },
+	{ ABX,		C_NONE,		C_NONE,		C_LBRA,		44,	14,	0 },
+	{ ABEQ,		C_NONE,		C_NONE,		C_GBRA,		42,  10, 	0 },
+	// { AB,		C_NONE,		C_NONE,		C_SOREG,		13,	0,	0 },
+	// { ABL,		C_NONE,		C_NONE,		C_SOREG,		14,	0,	0 },
+	{ ABL,		C_NONE,		C_NONE,		C_REG,		51,	4,	0 },
+	{ ABX,		C_NONE,		C_NONE,		C_REG,		15,	8,	0 },
+	{ ABX,		C_NONE,		C_NONE,		C_HREG,		15,	8,	0 },
+	{ ABXRET,		C_NONE,		C_NONE,		C_REG,		45,	2,	0 },
+	{ ABXRET,		C_NONE,		C_NONE,		C_HREG,		45,	2,	0 },
+	{ ASWI,		C_NONE,		C_NONE,		C_LCON,		16,	2,	0 },
+	{ AWORD,		C_NONE,		C_NONE,		C_LCON,		17,	4,	0 },
+	{ AWORD,		C_NONE,		C_NONE,		C_GCON,		17,	4,	0 },
+	{ AWORD,		C_NONE,		C_NONE,		C_LEXT,		17,	4, 	0 },
+	{ ADWORD,	C_LCON,		C_NONE,		C_LCON,		50,	8,	0 },
+	{ AMOVW,		C_SAUTO,		C_NONE,		C_REG,		18,	2,	REGSP },
+	{ AMOVW,		C_LAUTO,		C_NONE,		C_REG,		33,	6,	0,	LFROM  },
+	// { AMOVW,		C_OFFPC,		C_NONE,		C_REG,		18,	2,	REGPC,	LFROM  },
+	{ AMOVW,		C_SEXT,		C_NONE,		C_REG,		30,	4,	0 },
+	{ AMOVW,		C_SOREG,		C_NONE,		C_REG,		19,	2,	0 },
+	{ AMOVHU,	C_SEXT,		C_NONE,		C_REG,		30,	4,	0 },
+	{ AMOVHU,	C_SOREG,		C_NONE,		C_REG,		19,	2,	0 },
+	{ AMOVBU,	C_SEXT,		C_NONE,		C_REG,		30,	4,	0 },
+	{ AMOVBU,	C_SOREG,		C_NONE,		C_REG,		19,	2,	0 },
+	{ AMOVW,		C_REG,		C_NONE,		C_SAUTO,		20,	2,	0 },
+	{ AMOVW,		C_REG,		C_NONE,		C_LAUTO,		34,	6,	0,	LTO },
+	{ AMOVW,		C_REG,		C_NONE,		C_SEXT,		31,	4,	0 },
+	{ AMOVW,		C_REG,		C_NONE,		C_SOREG,		21,	2,	0 },
+	{ AMOVH,		C_REG,		C_NONE,		C_SEXT,		31,	4,	0 },
+	{ AMOVH,		C_REG,		C_NONE,		C_SOREG,		21,	2,	0 },
+	{ AMOVB,		C_REG,		C_NONE,		C_SEXT,		31,	4,	0 },
+	{ AMOVB,		C_REG,		C_NONE,		C_SOREG,		21,	2,	0 },
+	{ AMOVHU,	C_REG,		C_NONE,		C_SEXT,		31,	4,	0 },
+	{ AMOVHU,	C_REG,		C_NONE,		C_SOREG,		21,	2,	0 },
+	{ AMOVBU,	C_REG,		C_NONE,		C_SEXT,		31,	4,	0 },
+	{ AMOVBU,	C_REG,		C_NONE,		C_SOREG,		21,	2,	0 },
+	{ AMOVW,		C_REG,		C_NONE,		C_REG,		22,	2,	0 },
+	{ AMOVB,		C_REG,		C_NONE,		C_REG,		23,	4,	0 },
+	{ AMOVH,		C_REG,		C_NONE,		C_REG,		23,	4,	0 },
+	{ AMOVBU,	C_REG,		C_NONE,		C_REG,		23,	4,	0 },
+	{ AMOVHU,	C_REG,		C_NONE,		C_REG,		23,	4,	0 },
+	{ AMOVH,		C_SEXT,		C_NONE,		C_REG,		32,	6,	0 },
+	{ AMOVH,		C_SOREG,		C_NONE,		C_REG,		24,	4,	0 },
+	{ AMOVB,		C_SEXT,		C_NONE,		C_REG,		32,	6,	0 },
+	{ AMOVB,		C_SOREG,		C_NONE,		C_REG,		24,	4,	0 },
+	{ AMOVW,		C_SACON,	C_NONE,		C_REG,		25,	2,	0 },
+	{ AMOVW,		C_LACON,	C_NONE,		C_REG,		35,	4,	0 },
+	{ AMOVW,		C_GACON,	C_NONE,		C_REG,		35,	4,	0,	LFROM },
+	{ AMOVM,		C_LCON,		C_NONE,		C_REG,		26,	2,	0 },
+	{ AMOVM,		C_REG,		C_NONE,		C_LCON,		27,	2,	0 },
+	{ AMOVW,		C_LOREG,		C_NONE,		C_REG,		28,	4,	0 },
+	{ AMOVH,		C_LOREG,		C_NONE,		C_REG,		28,	4,	0 },
+	{ AMOVB,		C_LOREG,		C_NONE,		C_REG,		28,	4,	0 },
+	{ AMOVHU,	C_LOREG,		C_NONE,		C_REG,		28,	4,	0 },
+	{ AMOVBU,	C_LOREG,		C_NONE,		C_REG,		28,	4,	0 },
+	{ AMOVW,		C_REG,		C_NONE,		C_LOREG,		29,	4,	0 },
+	{ AMOVH,		C_REG,		C_NONE,		C_LOREG,		29,	4,	0 },
+	{ AMOVB,		C_REG,		C_NONE,		C_LOREG,		29,	4,	0 },
+	{ AMOVHU,	C_REG,		C_NONE,		C_LOREG,		29,	4,	0 },
+	{ AMOVBU,	C_REG,		C_NONE,		C_LOREG,		29,	4,	0 },
+	{ AMOVW,		C_GOREG,		C_NONE,		C_REG,		28,	4,	0,	LFROM },
+	{ AMOVH,		C_GOREG,		C_NONE,		C_REG,		28,	4,	0,	LFROM },
+	{ AMOVB,		C_GOREG,		C_NONE,		C_REG,		28,	4,	0,	LFROM },
+	{ AMOVHU,	C_GOREG,		C_NONE,		C_REG,		28,	4,	0,	LFROM },
+	{ AMOVBU,	C_GOREG,		C_NONE,		C_REG,		28,	4,	0,	LFROM },
+	{ AMOVW,		C_REG,		C_NONE,		C_GOREG,		29,	4,	0,	LTO },
+	{ AMOVH,		C_REG,		C_NONE,		C_GOREG,		29,	4,	0,	LTO },
+	{ AMOVB,		C_REG,		C_NONE,		C_GOREG,		29,	4,	0,	LTO },
+	{ AMOVHU,	C_REG,		C_NONE,		C_GOREG,		29,	4,	0,	LTO },
+	{ AMOVBU,	C_REG,		C_NONE,		C_GOREG,		29,	4,	0,	LTO },
+	{ AMOVW,		C_LEXT,		C_NONE,		C_REG,		30,	4,	0,	LFROM },
+	{ AMOVH,		C_LEXT,		C_NONE,		C_REG,		32,	6,	0,	LFROM },
+	{ AMOVB,		C_LEXT,		C_NONE,		C_REG,		32,	6,	0,	LFROM },
+	{ AMOVHU,	C_LEXT,		C_NONE,		C_REG,		30,	4,	0,	LFROM },
+	{ AMOVBU,	C_LEXT,		C_NONE,		C_REG,		30,	4,	0,	LFROM },
+	{ AMOVW,		C_REG,		C_NONE,		C_LEXT,		31,	4,	0,	LTO },
+	{ AMOVH,		C_REG,		C_NONE,		C_LEXT,		31,	4,	0,	LTO },
+	{ AMOVB,		C_REG,		C_NONE,		C_LEXT,		31,	4,	0,	LTO },
+	{ AMOVHU,	C_REG,		C_NONE,		C_LEXT,		31,	4,	0,	LTO },
+	{ AMOVBU,	C_REG,		C_NONE,		C_LEXT,		31,	4,	0,	LTO },
+
+	{ AXXX,		C_NONE,		C_NONE,		C_NONE,		0,	2,	0 },
+};
+
+#define OPCNTSZ	52
+int opcount[OPCNTSZ];
+
+// is this too pessimistic ?
+int
+brextra(Prog *p)
+{
+	int c;
+
+	// +2 is for padding
+	if(p->as == ATEXT)
+		return 0-0+2;
+	if(!isbranch(p))
+		diag("bad op in brextra()");
+	c = thumbaclass(&p->to, p);
+	switch(p->as){
+	case AB:
+		if(c != C_SBRA)
+			return 0;
+		return 8-2+2;
+	case ABL:
+		if(c != C_SBRA)
+			return 0;
+		return 14-4+2;
+	case ABX:
+		if(c == C_REG || c == C_HREG)
+			return 0;
+#ifdef CALLEEBX
+		diag("ABX $I in brextra");
+#endif
+		if(c != C_SBRA)
+			return 0;
+		return 14-10+2;
+	default:
+		if(c == C_GBRA)
+			return 0;
+		if(c == C_LBRA)
+			return 10-4+2;
+		return 10-2+2;
+	}
+}
+
+#define high(r)	((r)>=8)
+
+static long
+mv(Prog *p, int r, int off)
+{
+	int v, o;
+	if(p != nil && p->cond != nil){	// in literal pool
+		v = p->cond->pc - p->pc - 4;
+		if(p->cond->pc & 3)
+			diag("mv: bad literal pool alignment");
+		if(v & 3)
+			v += 2;	// ensure M(4) offset
+		mult(p, v, 4);
+		off = v/4;
+		numr(p, off, 0, 255);
+		o = 0x9<<11;
+	}
+	else{
+		numr(p, off, 0, 255);
+		o = 0x4<<11;
+	}
+	o |= (r<<8) | off;
+	return o;
+}
+
+static void
+mvcon(Prog *p, int r, int c, long *o1, long *o2)
+{
+	int op = 0, n = 0;
+
+	if(c >= 0 && c <= 255)
+		diag("bad c in mvcon");
+	if(c >= -255 && c < 0)	// mv, neg
+		c = -c;
+	else if(c >= 256 && c <= 510){	// mv, add
+		n = rand()%(511-c) + (c-255);
+		c -= n;
+		// n = c-255;
+		// c = 255;
+		op = AADD;
+	}
+	else{
+		if(c < 0)
+			diag("-ve in mvcon");
+		while(!(c & 1)){
+			n++;
+			c >>= 1;
+		}
+		if(c >= 0 && c <= 255)	// mv, lsl
+			op = ASLL;
+		else
+			diag("bad shift in mvcon");
+	}
+	*o1 = mv(p, r, c);
+	switch(op){
+		case 0:
+			*o2 = (1<<14) | (9<<6) | (r<<3) | r;
+			break;
+		case AADD:
+			*o2 = (6<<11) | (r<<8) | n;
+			break;
+		case ASLL:
+			*o2 = (n<<6) | (r<<3) | r;
+			break;
+	}
+}
+
+static long
+mvlh(int rs, int rd)
+{
+	int o = 0x46<<8;
+
+	if(high(rs)){
+		rs -= 8;
+		o |= 1<<6;
+	}
+	if(high(rd)){
+		rd -= 8;
+		o |= 1<<7;
+	}
+	o |= (rs<<3) | rd;
+	return o;
+}
+
+void
+thumbbuildop()
+{
+	int i, n, r;
+	Optab *optab = thumboptab;
+	Oprang *oprange = thumboprange;
+
+	for(n=0; optab[n].as != AXXX; n++)
+		;
+	qsort(optab, n, sizeof(optab[0]), ocmp);
+	for(i=0; i<n; i++) {
+		r = optab[i].as;
+		oprange[r].start = optab+i;
+		while(optab[i].as == r)
+			i++;
+		oprange[r].stop = optab+i;
+		i--;
+
+		switch(r)
+		{
+		default:
+			break;
+		case ABEQ:
+			oprange[ABNE] = oprange[r];
+			oprange[ABCS] = oprange[r];
+			oprange[ABHS] = oprange[r];
+			oprange[ABCC] = oprange[r];
+			oprange[ABLO] = oprange[r];
+			oprange[ABMI] = oprange[r];
+			oprange[ABPL] = oprange[r];
+			oprange[ABVS] = oprange[r];
+			oprange[ABVC] = oprange[r];
+			oprange[ABHI] = oprange[r];
+			oprange[ABLS] = oprange[r];
+			oprange[ABGE] = oprange[r];
+			oprange[ABLT] = oprange[r];
+			oprange[ABGT] = oprange[r];
+			oprange[ABLE] = oprange[r];
+			break;
+		case AMVN:
+			oprange[AADC] = oprange[r];
+			oprange[ASBC] = oprange[r];
+			oprange[AMUL] = oprange[r];
+			oprange[AAND] = oprange[r];
+			oprange[AEOR] = oprange[r];
+			oprange[AORR] = oprange[r];
+			oprange[ABIC] = oprange[r];
+			oprange[AMULU] = oprange[r];
+			break;
+		case ACMN:
+			oprange[ATST] = oprange[r];
+			break;
+		case ASRL:
+			oprange[ASRA] = oprange[r];
+			oprange[ASLL] = oprange[r];
+			break;
+		case AADD:
+			oprange[ASUB] = oprange[r];
+			break;
+		}
+	}
+}
+
+void
+thumbasmout(Prog *p, Optab *o)
+{
+	long o1, o2, o3, o4, o5, o6, o7, v;
+	int r, rf, rt;
+
+	rf = p->from.reg;
+	rt = p->to.reg;
+	r = p->reg;
+	o1 = o2 = o3 = o4 = o5 = o6 = o7 = 0;
+if(debug['P']) print("%ulx: %P	type %d %d\n", (ulong)(p->pc), p, o->type, p->align);
+	opcount[o->type] += o->size;
+	switch(o->type) {
+	default:
+		diag("unknown asm %d", o->type);
+		prasm(p);
+		break;
+	case 0:		/* pseudo ops */
+if(debug['G']) print("%ulx: %s: thumb\n", (ulong)(p->pc), p->from.sym->name);
+		break;
+	case 1:		/* op R, -, R or op R, R, - */
+		o1 = thumboprr(p->as);
+		if(rt == NREG)
+			rt = r;
+		lowreg(p, rf);
+		lowreg(p, rt);
+		o1 |= (0x10<<10) | (rf<<3) | rt;
+		break;
+	case 2:		/* add/sub R, R, R or add/sub R, -, R */
+		o1 = p->as == AADD ? 0x0<<9 : 0x1<<9;
+		if(r == NREG)
+			r = rt;
+		lowreg(p, rf);
+		lowreg(p, r);
+		lowreg(p, rt);
+		o1 |= (0x6<<10) | (rf<<6) | (r<<3) | rt;
+		break;
+	case 3:		/* add/sub $I, R, R or add/sub $I, -, R */
+		thumbaclass(&p->from, p);
+		o1 = p->as == AADD ? 0x0<<9 : 0x1<<9;
+		if(r == NREG)
+			r = rt;
+		numr(p, instoffset, 0, 7);
+		lowreg(p, r);
+		lowreg(p, rt);
+		o1 |= (0x7<<10) | (instoffset<<6) | (r<<3) | rt;
+		break;
+	case 4:		/* shift $I, R, R or shift $I, -, R */
+		thumbaclass(&p->from, p);
+		if(instoffset < 0)
+			diag("negative shift in thumbasmout");
+		instoffset %= 32;
+		o1 = thumbopri(p->as);
+		if(r == NREG)
+			r = rt;
+		numr(p, instoffset, 0, 31);
+		lowreg(p, r);
+		lowreg(p, rt);
+		o1 |= (0x0<<13) | (instoffset<<6) | (r<<3) | rt;
+		break;
+	case 5:		/* add/sub/mov $I, -, R or cmp $I, R, - */
+		thumbaclass(&p->from, p);
+		o1 = thumbopri(p->as);	
+		if(rt == NREG)
+			rt = r;
+		numr(p, instoffset, 0, 255);
+		lowreg(p, rt);
+		o1 |= (0x1<<13) | (rt<<8) | instoffset;
+		break;
+	case 6:		/* add $I, PC/SP, R */
+		if(p->as == ASUB)
+			diag("subtract in add $I, PC/SP, R");
+		thumbaclass(&p->from, p);
+		o1 = r == REGSP ? 0x1<<11 : 0x0<<11;
+		numr(p, instoffset, 0, 255);
+		regis(p, r, REGSP, REGPC);
+		lowreg(p, rt);
+		o1 |= (0xa<<12) | (rt<<8) | instoffset;
+		break;
+	case 7:		/* add, sub $I, SP */
+		thumbaclass(&p->from, p);
+		o1 = p->as == AADD ? 0x0<<7 : 0x1<<7;
+		numr(p, instoffset, 0, 508);
+		mult(p, instoffset, 4);
+		regis(p, rt, REGSP, REGSP);
+		o1 |= (0xb0<<8) | (instoffset>>2);
+		break;
+	case 8:		/* add/mov/cmp R, R where at least 1 reg is high */
+		o1 = 0;
+		if(rt == NREG)
+			rt = r;
+		if(high(rf)){
+			o1 |= 1<<6;
+			rf -= 8;
+		}
+		if(high(rt)){
+			o1 |= 2<<6;
+			rt -= 8;
+		}
+		if(o1 == 0)
+			diag("no high register(%P)", p);
+		o1 |= thumbophh(p->as);
+		o1 |= (0x11<<10) | (rf<<3) | rt;
+		break;
+	case 9:		/* B	$I */
+		thumbaclass(&p->to, p);
+		numr(p, instoffset, -2048, 2046);
+		o1 = (0x1c<<11) | ((instoffset>>1)&0x7ff);
+		break;
+	case 10:		/* Bcc $I */
+		thumbaclass(&p->to, p);
+		numr(p, instoffset, -256, 254);
+		o1 = thumbopbra(p->as);
+		o1 |= (0xd<<12) | ((instoffset>>1)&0xff);
+		break;
+	case 11:		/* BL $I */
+		thumbaclass(&p->to, p);
+		numr(p, instoffset, -4194304, 4194302);
+		o1 = (0x1e<<11) | ((instoffset>>12)&0x7ff);
+		o2 = (0x1f<<11) | ((instoffset>>1)&0x7ff);
+		break;
+	case 12:		/* BX $I */
+#ifdef CALLEEBX
+		diag("BX $I case");
+#endif
+		thumbaclass(&p->to, p);
+		if(p->to.sym->thumb)
+			instoffset  |= 1;	// T bit
+		o1 = mvlh(REGPC, REGTMPT);
+		o2 = (0x6<<11) | (REGTMPT<<8) | 7;	// add 7, RTMP	(T bit + PC offset)
+		o3 = mvlh(REGTMPT, REGLINK);
+		o4 = mv(nil, REGTMPT, instoffset);
+		o5 = (0x11c<<6) | (REGTMPT<<3);
+		// o1 = mv(nil, REGTMPT, v);
+		// o2 = (0x11b<<6) | (REGPC<<3) | REGLINK;
+		// o3 = (0x11c<<6) | (REGTMPT<<3);
+		break;
+	case 13:		/* B O(R)  */
+		diag("B O(R)");
+		break;
+	case 14:		/* BL O(R) */
+		diag("BL O(R)");
+		break;
+	case 15:		/* BX R */
+		o1 = mvlh(REGPC, REGTMPT);
+		o2 = (0x6<<11) | (REGTMPT<<8) | 5;	// add 5, RTMP (T bit + PC offset)
+		o3 = mvlh(REGTMPT, REGLINK);
+		o4 = 0;
+		if(high(rt)){
+			rt -= 8;
+			o4 |= 1<<6;
+		}
+		o4 |= (0x8e<<7) | (rt<<3);
+		// o1 = (0x11c<<6) | (rt<<3);
+		break;
+	case 16:		/* SWI $I */
+		thumbaclass(&p->to, p);
+		numr(p, instoffset, 0, 255);
+		o1 = (0xdf<<8) | instoffset;
+		break;
+	case 17:		/* AWORD */
+		thumbaclass(&p->to, p);
+		o1 = instoffset&0xffff;
+		o2 = (instoffset>>16)&0xffff;
+		break;
+	case 18:		/* AMOVW O(SP), R and AMOVW O(PC), R */
+		thumbaclass(&p->from, p);
+		rf = o->param;
+		o1 = rf == REGSP ? 0x13<<11 : 0x9<<11;
+		regis(p, rf, REGSP, REGPC);
+		lowreg(p, rt);
+		mult(p, instoffset, 4);
+		numr(p, instoffset/4, 0, 255);
+		o1 |= (rt<<8) | (instoffset/4);
+		break;
+	case 19:		/* AMOVW... O(R), R */
+		thumbaclass(&p->from, p);
+		o1 = thumbopmv(p->as, 1);
+		v = 4;
+		if(p->as == AMOVHU)
+			v = 2;
+		else if(p->as == AMOVBU)
+			v = 1;
+		mult(p, instoffset, v);
+		lowreg(p, rf);
+		lowreg(p, rt);
+		numr(p, instoffset/v, 0, 31);
+		o1 |= ((instoffset/v)<<6) | (rf<<3) | rt;
+		break;
+	case 20:		/* AMOVW R, O(SP) */
+		thumbaclass(&p->to, p);
+		o1 = 0x12<<11;
+		if(rt != NREG) regis(p, rt, REGSP, REGSP);
+		lowreg(p, rf);
+		mult(p, instoffset, 4);
+		numr(p, instoffset/4, 0, 255);
+		o1 |= (rf<<8) | (instoffset/4);
+		break;
+	case 21:		/* AMOVW... R, O(R) */
+		thumbaclass(&p->to, p);
+		o1 = thumbopmv(p->as, 0);
+		v = 4;
+		if(p->as == AMOVHU || p->as == AMOVH)
+			v = 2;
+		else if(p->as == AMOVBU || p->as == AMOVB)
+			v = 1;
+		lowreg(p, rf);
+		lowreg(p, rt);
+		mult(p, instoffset, v);
+		numr(p, instoffset/v, 0, 31);
+		o1 |= ((instoffset/v)<<6) | (rt<<3) | rf;
+		break;
+	case 22:		/* AMOVW R, R -> ASLL $0, R, R */
+		o1 = thumbopri(ASLL);
+		lowreg(p, rf);
+		lowreg(p, rt);
+		o1 |= (0x0<<13) | (rf<<3) | rt;
+		break;
+	case 23:		/* AMOVB/AMOVH/AMOVBU/AMOVHU R, R */
+		o1 = thumbopri(ASLL);
+		o2 = p->as == AMOVB || p->as == AMOVH ? thumbopri(ASRA) : thumbopri(ASRL);
+		v = p->as == AMOVB || p->as == AMOVBU ? 24 : 16;
+		lowreg(p, rf);
+		lowreg(p, rt);
+		o1 |= (0x0<<13) | (v<<6) | (rf<<3) | rt;
+		o2 |= (0x0<<13) | (v<<6) | (rt<<3) | rt;
+		break;
+	case 24:	/* AMOVH/AMOVB O(R), R -> AMOVH/AMOVB [R, R], R */
+		thumbaclass(&p->from, p);
+		lowreg(p, rf);
+		lowreg(p, rt);
+		if(rf == rt)
+			r = REGTMPT;
+		else
+			r = rt;
+		if(p->as == AMOVB)
+			numr(p, instoffset, 0, 31);
+		else{
+			mult(p, instoffset, 2);
+			numr(p, instoffset, 0, 62);
+		}
+		o1 = mv(p, r, instoffset);
+		o2 = p->as == AMOVH ? 0x2f<<9 : 0x2b<<9;
+		o2 |= (r<<6) | (rf<<3) | rt;
+		break;
+	case 25:	/* MOVW $sacon, R */
+		thumbaclass(&p->from, p);
+// print("25: %d %d %d %d\n", instoffset, rf, r, rt);
+		if(rf == NREG)
+			rf = REGSP;
+		lowreg(p, rt);
+		if(rf == REGSP){
+			mult(p, instoffset, 4);
+			numr(p, instoffset>>2, 0, 255);
+			o1 = (0x15<<11) | (rt<<8) | (instoffset>>2);	// add $O, SP, R
+		}
+		else if(rf == rt){
+			numr(p, instoffset, 0, 255);
+			o1 = (0x6<<11) | (rt<<8) | instoffset;		// add $O, R
+		}
+		else{
+			lowreg(p, rf);
+			numr(p, instoffset, 0, 7);
+			o1 = (0xe<<9) | (instoffset<<6) | (rf<<3) | rt;	// add $O, Rs, Rd
+		}
+		break;
+	case 26:	/* AMOVM $c, oreg -> stmia */
+		lowreg(p, rt);
+		numr(p, p->from.offset, -256, 255);
+		o1 = (0x18<<11) | (rt<<8) | (p->from.offset&0xff);
+		break;
+	case 27:	/* AMOVM oreg, $c ->ldmia */
+		lowreg(p, rf);
+		numr(p, p->to.offset, -256, 256);
+		o1 = (0x19<<11) | (rf<<8) | (p->to.offset&0xff);
+		break;
+	case 28:	/* AMOV* O(R), R -> AMOV* [R, R], R 	(offset large)	*/
+		thumbaclass(&p->from, p);
+		lowreg(p, rf);
+		lowreg(p, rt);
+		if(rf == rt)
+			r = REGTMPT;
+		else
+			r = rt;
+		o1 = mv(p, r, instoffset);
+		o2 = thumboprrr(p->as, 1);
+		o2 |= (r<<6) | (rf<<3) | rt;
+		break;
+	case 29:	/* AMOV* R, O(R) -> AMOV* R, [R, R]	(offset large)	*/
+		thumbaclass(&p->to, p);
+		lowreg(p, rf);
+		lowreg(p, rt);
+		if(rt == REGTMPT){	// used as tmp reg
+			if(instoffset >= 0 && instoffset <= 255){
+				o1 = (1<<13) | (2<<11) | (rt<<8) | instoffset;	// add $O, R7
+				o2 = thumbopirr(p->as, 0);
+				o2 |= (0<<6) | (rt<<3) | rf;					// mov* R, 0(R)
+			}
+			else
+				diag("big offset - case 29");
+		}
+		else{
+			o1 = mv(p, REGTMPT, instoffset);
+			o2 = thumboprrr(p->as, 0);
+			o2 |= (REGTMPT<<6) | (rt<<3) | rf;
+		}
+		break;
+	case 30:		/* AMOVW... *addr, R */
+		thumbaclass(&p->from, p);
+		o1 = mv(p, rt, instoffset);		// MOV addr, rtmp
+		o2 = thumbopmv(p->as, 1);
+		lowreg(p, rt);
+		o2 |= (rt<<3) | rt;			// MOV* 0(rtmp), R
+		break;
+	case 31:		/* AMOVW... R, *addr */
+		thumbaclass(&p->to, p);
+		o1 = mv(p, REGTMPT, instoffset);
+		o2 = thumbopmv(p->as, 0);
+		lowreg(p, rf);
+		o2 |= (REGTMPT<<3) | rf;
+		break;
+	case 32:	/* AMOVH/AMOVB *addr, R -> AMOVH/AMOVB [R, R], R */
+		thumbaclass(&p->from, p);
+		o1 = mv(p, rt, instoffset);
+		lowreg(p, rt);
+		o2 = mv(nil, REGTMPT, 0);
+		o3 = p->as == AMOVH ? 0x2f<<9 : 0x2b<<9;
+		o3 |= (REGTMPT<<6) | (rt<<3) | rt;
+		break;
+	case 33:	/* AMOVW O(SP), R	(O large) */
+		thumbaclass(&p->from, p);
+		lowreg(p, rt);
+		o1 = mv(p, rt, instoffset);
+		o2 = (0x111<<6) | (REGSP-8)<<3 | rt;	// add SP, rt
+		o3 = thumbopmv(p->as, 1);
+		o3 |= (rt<<3) | rt;
+		break;
+	case 34:	/* AMOVW R, O(SP)	(O large) */
+		thumbaclass(&p->to, p);
+		lowreg(p, rf);
+		o1 = mv(p, REGTMPT, instoffset);
+		o2 = (0x111<<6) | (REGSP-8)<<3 | REGTMPT;	// add SP, REGTMP
+		o3 = thumbopmv(p->as, 0);
+		o3 |= (REGTMPT<<3) | rf;
+		break;
+	case 35:	/* AMOVW $lacon, R */
+		thumbaclass(&p->from, p);
+		lowreg(p, rt);
+		if(rf == NREG)
+			rf = REGSP;
+		if(rf == rt)
+			rf = r = REGTMPT;
+		else
+			r = rt;
+// print("35: io=%d rf=%d rt=%d\n", instoffset, rf, rt);
+		o1 = mv(p, r, instoffset);		// mov O, Rd
+		if(high(rf))
+			o2 = (0x44<<8) | (0x1<<6) | ((rf-8)<<3) | rt;	// add Rs, Rd
+		else
+			o2 = (0x6<<10) | (rf<<6) | (rt<<3) | rt;		// add Rs, Rd
+		break;
+	case 36:	/* AADD/ASUB $i, r, r when $i too big */
+		thumbaclass(&p->from, p);
+		lowreg(p, r);
+		lowreg(p, rt);
+		o1 = mv(p, REGTMPT, instoffset);
+		o2 = p->as == AADD ? 0xc<<9 : 0xd<<9;
+		o2 |= (REGTMPT<<6) | (r<<3) | rt;
+		break;
+	case 37:	/* AADD/ASUB $i, r when $i too big */
+		thumbaclass(&p->from, p);
+		lowreg(p, rt);
+		o1 = mv(p, REGTMPT, instoffset);
+		o2 = p->as == AADD ? 0xc<<9 : 0xd<<9;
+		o2 |= (REGTMPT<<6) | (rt<<3) | rt;
+		break;
+	case 38:	/* AMOVW $i, r when $i too big */
+		thumbaclass(&p->from, p);
+		lowreg(p, rt);
+		o1 = mv(p, rt, instoffset);
+		break;
+	case 39:	/* ACMP $i, r when $i too big */
+		thumbaclass(&p->from, p);
+		lowreg(p, r);
+		o1 = mv(p, REGTMPT, instoffset);
+		o2 = (0x10a<<6) | (REGTMPT<<3) | r;
+		break;
+	case 40:		/* add, sub $I, SP when $I large*/
+		thumbaclass(&p->from, p);
+		if(p->as == ASUB)
+			instoffset = -instoffset;
+		o1 = mv(p, REGTMPT, instoffset);
+		o2 = (0x112<<6) | (REGTMPT<<3) | (REGSP-8);
+		regis(p, rt, REGSP, REGSP);
+		break;
+	case	41:		/* BL LBRA */
+		thumbaclass(&p->to, p);
+		o1 = (0x9<<11) | (REGTMPT<<8);	// mov 0(pc), r7
+		o2 = mvlh(REGTMPT, REGPC);		// mov r7, pc
+		o3 = instoffset&0xffff;			// $lab
+		o4 = (instoffset>>16)&0xffff;
+		break;
+	case 42:		/* Bcc GBRA */
+		thumbaclass(&p->to, p);
+		o1 = (0xd<<12) | thumbopbra(relinv(p->as)) | (6>>1);		// bccnot 
+		// ab lbra
+		o2 = (0x9<<11) | (REGTMPT<<8);	// mov 0(pc), r7
+		o3 = mvlh(REGTMPT, REGPC);		// mov r7, pc
+		o4 = instoffset&0xffff;			// $lab
+		o5 = (instoffset>>16)&0xffff;
+		break;
+	case 43:		/* BL LBRA */
+		thumbaclass(&p->to, p);
+		o1 = mvlh(REGPC, REGTMPT);						// mov pc, r7
+		o2 = (0x6<<11) | (REGTMPT<<8) | 10;				// add 10, r7
+		o3 = mvlh(REGTMPT, REGLINK);					// mov r7, lr
+		o4 = (0x9<<11) | (REGTMPT<<8);					// mov o(pc), r7
+		o5 = mvlh(REGTMPT, REGPC);						// mov r7, pc
+		o6 = instoffset&0xffff;							// $lab
+		o7 = (instoffset>>16)&0xffff;
+		break;
+	case 44:		/* BX LBRA */
+#ifdef CALLEEBX
+		diag("BX LBRA case");
+#endif
+		thumbaclass(&p->to, p);
+		if(p->to.sym->thumb)
+			instoffset  |= 1;	// T bit
+		o1 = mvlh(REGPC, REGTMPT);						// mov pc, r7
+		o2 = (0x6<<11) | (REGTMPT<<8) | 11;				// add 11, r7
+		o3 = mvlh(REGTMPT, REGLINK);					// mov r7, lr
+		o4 = (0x9<<11) | (REGTMPT<<8);					// mov o(pc), r7
+		o5 = (0x11c<<6) | (REGTMPT<<3);					// bx r7
+		o6 = instoffset&0xffff;							// $lab
+		o7 = (instoffset>>16)&0xffff;
+		break;
+	case 45:	/* BX R when returning from fn */
+		o1 = 0;
+		if(high(rt)){
+			rt -= 8;
+			o1 |= 1<<6;
+		}
+		o1 |= (0x8e<<7) | (rt<<3);
+		break;
+	case 46:		/* Bcc LBRA */
+		thumbaclass(&p->to, p);
+		o1 = (0xd<<12) | thumbopbra(relinv(p->as)) | (0>>1);		// bccnot 
+		// ab lbra
+		instoffset -= 2;
+		numr(p, instoffset, -2048, 2046);
+		o2 = (0x1c<<11) | ((instoffset>>1)&0x7ff);
+		break;
+	case 47:	/* mov $i, R where $i can be built */
+		thumbaclass(&p->from, p);
+		mvcon(p, rt, instoffset, &o1, &o2);
+		break;
+	case 48: /* ACMP $i, r when $i built up */
+		thumbaclass(&p->from, p);
+		lowreg(p, r);
+		mvcon(p, REGTMPT, instoffset, &o1, &o2);
+		o3 = (0x10a<<6) | (REGTMPT<<3) | r;
+		break;
+	case 49:	/* AADD $i, r, r when $i is between 0 and 255 - could merge with case 36 */
+		thumbaclass(&p->from, p);
+		lowreg(p, r);
+		lowreg(p, rt);
+		numr(p, instoffset, 0, 255);
+		o1 = mv(p, REGTMPT, instoffset);
+		o2 = p->as == AADD ? 0xc<<9 : 0xd<<9;
+		o2 |= (REGTMPT<<6) | (r<<3) | rt;
+		break;
+	case 50:		/* ADWORD */
+		thumbaclass(&p->from, p);
+		o1 = instoffset&0xffff;
+		o2 = (instoffset>>16)&0xffff;
+		thumbaclass(&p->to, p);
+		o3 = instoffset&0xffff;
+		o4 = (instoffset>>16)&0xffff;
+		break;
+	case 51:	/* BL r */
+		o1 = mvlh(REGPC, REGLINK);	// mov pc, lr
+		o2 = mvlh(rt, REGPC);		// mov r, pc
+		break;
+	}
+
+	v = p->pc;
+	switch(o->size) {
+	default:
+		if(debug['a'])
+			Bprint(&bso, " %.8lux:\t\t%P\n", v, p);
+		break;
+	case 2:
+		if(debug['a'])
+			Bprint(&bso, " %.8lux: %.8lux\t%P\n", v, o1, p);
+		hputl(o1);
+		break;
+	case 4:
+		if(debug['a'])
+			Bprint(&bso, " %.8lux: %.8lux %.8lux\t%P\n", v, o1, o2, p);
+		hputl(o1);
+		hputl(o2);
+		break;
+	case 6:
+		if(debug['a'])
+			Bprint(&bso, "%.8lux: %.8lux %.8lux %.8lux\t%P\n", v, o1, o2, o3, p);
+		hputl(o1);
+		hputl(o2);
+		hputl(o3);
+		break;
+	case 8:
+		if(debug['a'])
+			Bprint(&bso, "%.8lux: %.8lux %.8lux %.8lux %.8lux\t%P\n", v, o1, o2, o3, o4, p);
+		hputl(o1);
+		hputl(o2);
+		hputl(o3);
+		hputl(o4);
+		break;
+	case 10:
+		if(debug['a'])
+			Bprint(&bso, "%.8lux: %.8lux %.8lux %.8lux %.8lux %.8lux\t%P\n", v, o1, o2, o3, o4, o5, p);
+		hputl(o1);
+		hputl(o2);
+		hputl(o3);
+		hputl(o4);
+		hputl(o5);
+		break;
+	case 12:
+		if(debug['a'])
+			Bprint(&bso, "%.8lux: %.8lux %.8lux %.8lux %.8lux %.8lux %.8lux\t%P\n", v, o1, o2, o3, o4, o5, o6, p);
+		hputl(o1);
+		hputl(o2);
+		hputl(o3);
+		hputl(o4);
+		hputl(o5);
+		hputl(o6);
+		break;
+	case 14:
+		if(debug['a'])
+			Bprint(&bso, "%.8lux: %.8lux %.8lux %.8lux %.8lux %.8lux %.8lux %.8lux\t%P\n", v, o1, o2, o3, o4, o5, o6, o7, p);
+		hputl(o1);
+		hputl(o2);
+		hputl(o3);
+		hputl(o4);
+		hputl(o5);
+		hputl(o6);
+		hputl(o7);
+		break;
+	}
+	if(debug['G']){
+		if(o->type == 17){
+			print("%lx:	word %ld\n", p->pc, (o2<<16)+o1);
+			return;
+		}
+		if(o->type == 50){
+			print("%lx:	word %ld\n", p->pc, (o2<<16)+o1);
+			print("%lx:	word %ld\n", p->pc, (o4<<16)+o3);
+			return;
+		}
+		if(o->size > 0) dis(o1, p->pc);
+		if(o->size > 2) dis(o2, p->pc+2);
+		if(o->size > 4) dis(o3, p->pc+4);
+		if(o->size > 6) dis(o4, p->pc+6);
+		if(o->size > 8) dis(o5, p->pc+8);
+		if(o->size > 10) dis(o6, p->pc+10);
+		if(o->size > 12) dis(o7, p->pc+12);
+		// if(o->size > 14) dis(o8, p->pc+14);
+	}
+}
+
+static long
+thumboprr(int a)
+{
+	switch(a) {
+	case AMVN:	return 0xf<<6;
+	case ACMP:	return 0xa<<6;
+	case ACMN:	return 0xb<<6;
+	case ATST:	return 0x8<<6;
+	case AADC:	return 0x5<<6;
+	case ASBC:	return 0x6<<6;
+	case AMUL:
+	case AMULU:	return 0xd<<6;
+	case AAND:	return 0x0<<6;
+	case AEOR:	return 0x1<<6;
+	case AORR:	return 0xc<<6;
+	case ABIC:	return 0xe<<6;
+	case ASRL:	return 0x3<<6;
+	case ASRA:	return 0x4<<6;
+	case ASLL:	return 0x2<<6;
+	}
+	diag("bad thumbop oprr %d", a);
+	prasm(curp);
+	return 0;
+}
+
+static long
+thumbopirr(int a, int ld)
+{
+	if(ld)
+		diag("load in thumbopirr");
+	switch(a){
+		case AMOVW:	return 0xc<<11;
+		case AMOVH:
+		case AMOVHU:	return 0x10<<11;
+		case AMOVB:
+		case AMOVBU:	return 0xe<<11;
+	}
+	return 0;
+}
+	
+static long
+thumboprrr(int a, int ld)
+{
+	if(ld){
+		switch(a){
+		case AMOVW:	return 0x2c<<9;
+		case AMOVH:	return 0x2f<<9;
+		case AMOVB:	return 0x2b<<9;
+		case AMOVHU:	return 0x2d<<9;
+		case AMOVBU:	return 0x2e<<9;
+		}
+	}
+	else{
+		switch(a){
+		case AMOVW:	return 0x28<<9;
+		case AMOVHU:
+		case AMOVH:	return 0x29<<9;
+		case AMOVBU:
+		case AMOVB:	return 0x2a<<9;
+		}
+	}
+	diag("bad thumbop oprrr %d", a);
+	prasm(curp);
+	return 0;
+}
+
+static long
+thumbopri(int a)
+{
+	switch(a) {
+	case ASRL:	return 0x1<<11;
+	case ASRA:	return 0x2<<11;
+	case ASLL:	return 0x0<<11;
+	case AADD:	return 0x2<<11;
+	case ASUB:	return 0x3<<11;
+	case AMOVW:	return 0x0<<11;
+	case ACMP:	return 0x1<<11;
+	}
+	diag("bad thumbop opri %d", a);
+	prasm(curp);
+	return 0;
+}
+
+static long
+thumbophh(int a)
+{
+	switch(a) {
+	case AADD:	return 0x0<<8;
+	case AMOVW:	return 0x2<<8;
+	case ACMP:	return 0x1<<8;
+	}
+	diag("bad thumbop ophh %d", a);
+	prasm(curp);
+	return 0;
+}
+
+static long
+thumbopbra(int a)
+{
+	switch(a) {
+	case ABEQ:	return 0x0<<8;
+	case ABNE:	return 0x1<<8;
+	case ABCS:	return 0x2<<8;
+	case ABHS:	return 0x2<<8;
+	case ABCC:	return 0x3<<8;
+	case ABLO:	return 0x3<<8;
+	case ABMI:	return 0x4<<8;
+	case ABPL:	return 0x5<<8;
+	case ABVS:	return 0x6<<8;
+	case ABVC:	return 0x7<<8;
+	case ABHI:	return 0x8<<8;
+	case ABLS:	return 0x9<<8;
+	case ABGE:	return 0xa<<8;
+	case ABLT:	return 0xb<<8;
+	case ABGT:	return 0xc<<8;
+	case ABLE:	return 0xd<<8;
+	}
+	diag("bad thumbop opbra %d", a);
+	prasm(curp);
+	return 0;
+}
+
+static long
+thumbopmv(int a, int ld)
+{
+	switch(a) {
+	case AMOVW: 	return (ld ? 0xd : 0xc)<<11;
+	case AMOVH:
+	case AMOVHU:	return (ld ? 0x11: 0x10)<<11;
+	case AMOVB:
+	case AMOVBU:	return (ld ? 0xf : 0xe)<<11;
+	}
+	diag("bad thumbop opmv %d", a);
+	prasm(curp);
+	return 0;
+}
+
+static void 
+lowreg(Prog *p, int r)
+{
+	if(high(r))
+		diag("high reg [%P]", p);
+}
+
+static void
+mult(Prog *p, int n, int m)
+{
+	if(m*(n/m) != n)
+		diag("%d not M(%d) [%P]", n, m, p);
+}
+
+static void 
+numr(Prog *p, int n, int min, int max)
+{
+	if(n < min || n > max)
+		diag("%d not in %d-%d [%P]", n, min, max, p);
+}
+
+static void 
+regis(Prog *p, int r, int r1, int r2)
+{
+	if(r != r1 && r != r2)
+		diag("reg %d not %d or %d [%P]", r, r1, r2, p);
+}
+
+void
+hputl(int n)
+{
+	cbp[1] = n>>8;
+	cbp[0] = n;
+	cbp += 2;
+	cbc -= 2;
+	if(cbc <= 0)
+		cflush();
+}
+
+void
+thumbcount()
+{
+	int i, c = 0, t = 0;
+
+	for (i = 0; i < OPCNTSZ; i++)
+		t += opcount[i];
+	if(t == 0)
+		return;
+	for (i = 0; i < OPCNTSZ; i++){
+		c += opcount[i];
+		print("%d:	%d %d %d%%\n", i, opcount[i], c, (opcount[i]*100+t/2)/t);
+	}
+}
+	
+char *op1[] = { "lsl", "lsr", "asr" };
+char *op2[] = { "add", "sub" };
+char *op3[] = { "movw", "cmp", "add", "sub" };
+char *op4[] = { "and", "eor", "lsl", "lsr", "asr", "adc", "sbc", "ror",
+		        "tst", "neg", "cmp", "cmpn", "or", "mul", "bitc", "movn" };
+char *op5[] = { "add", "cmp", "movw", "bx" };
+char *op6[] = { "smovw", "smovh", "smovb", "lmovb", "lmovw", "lmovhu", "lmovbu", "lmovh" };
+char *op7[] = { "smovw", "lmovw", "smovb", "lmovbu" };
+char *op8[] = { "smovh", "lmovhu" };
+char *op9[] = { "smovw", "lmovw" };
+char *op10[] = { "push", "pop" };
+char *op11[] = { "stmia", "ldmia" };
+
+char *cond[] = { "eq", "ne", "hs", "lo", "mi", "pl", "vs", "vc",
+			 "hi", "ls", "ge", "lt", "gt", "le", "al", "nv" };
+
+#define B(h, l)		bits(i, h, l)
+#define IMM(h, l)	B(h, l)
+#define REG(h, l)	reg(B(h, l))
+#define LHREG(h, l, lh)	lhreg(B(h, l), B(lh, lh))
+#define COND(h, l)	cond[B(h, l)]
+#define OP1(h, l)	op1[B(h, l)]
+#define OP2(h, l)	op2[B(h, l)]
+#define OP3(h, l)	op3[B(h, l)]
+#define OP4(h, l)	op4[B(h, l)]
+#define OP5(h, l)	op5[B(h, l)]
+#define OP6(h, l)	op6[B(h, l)]
+#define OP7(h, l)	op7[B(h, l)]
+#define OP8(h, l)	op8[B(h, l)]
+#define OP9(h, l)	op9[B(h, l)]
+#define OP10(h, l)	op10[B(h, l)]
+#define OP11(h, l)	op11[B(h, l)]
+#define SBZ(h, l)	if(IMM(h, l) != 0) diag("%x: %x bits %d,%d not zero", pc, i, h, l)
+#define SNBZ(h, l)	if(IMM(h, l) == 0) diag("%x: %x bits %d,%d zero", pc, i, h, l)
+#define SBO(h, l)	if(IMM(h, l) != 1) diag("%x: %x bits %d,%d not one", pc, i, h, l)
+
+static int
+bits(int i, int h, int l)
+{
+	if(h < l)
+		diag("h < l in bits");
+	return (i&(((1<<(h-l+1))-1)<<l))>>l;
+}
+
+static char *
+reg(int r)
+{
+	static char s[4][4];
+	static int i = 0;
+
+	if(r < 0 || r > 7)
+		diag("register %d out of range", r);
+	i++;
+	if(i == 4)
+		i = 0;
+	sprint(s[i], "r%d", r);
+	return s[i];
+}
+
+static char *regnames[] = { "sp", "lr", "pc" };
+
+static char *
+lhreg(int r, int lh)
+{
+	static char s[4][4];
+	static int i = 0;
+
+	if(lh == 0)
+		return reg(r);
+	if(r < 0 || r > 7)
+		diag("high register %d out of range", r);
+	i++;
+	if(i == 4)
+		i = 0;
+	if(r >= 5)
+		sprint(s[i], "%s", regnames[r-5]);
+	else
+		sprint(s[i], "r%d", r+8);
+	return s[i];
+}
+	
+static void
+illegal(int i, int pc)
+{
+	diag("%x: %x illegal instruction", pc, i);
+}
+
+static void
+dis(int i, int pc)
+{
+	static int lasto;
+	int o, l;
+	char *op;
+
+	print("%x: %x:	", pc, i);
+	if(i&0xffff0000)
+		illegal(i, pc);
+	o = B(15, 13);
+	switch(o){
+	case 0:
+		o = B(12, 11);
+		switch(o){
+			case 0:
+			case 1:
+			case 2:
+				print("%s	%d, %s, %s\n", OP1(12, 11), IMM(10, 6), REG(5, 3), REG(2, 0));
+				return;
+			case 3:
+				if(B(10, 10) == 0)
+					print("%s	%s, %s, %s\n", OP2(9, 9), REG(8, 6), REG(5, 3), REG(2, 0));
+				else
+					print("%s	%d, %s, %s\n", OP2(9, 9), IMM(8, 6), REG(5, 3), REG(2, 0));
+				return;
+		}
+	case 1:
+		print("%s	%d, %s\n", OP3(12, 11), IMM(7, 0), REG(10, 8));
+		return;
+	case 2:
+		o = B(12, 10);
+		if(o == 0){
+			print("%s	%s, %s\n", OP4(9, 6), REG(5, 3), REG(2, 0));
+			return;
+		}
+		if(o == 1){
+			o = B(9, 8);
+			if(o == 3){
+				SBZ(7, 7);
+				SBZ(2, 0);
+				print("%s	%s\n", OP5(9, 8), LHREG(5, 3, 6));
+				return;
+			}
+			SNBZ(7, 6);
+			print("%s	%s, %s\n", OP5(9, 8), LHREG(5, 3, 6), LHREG(2, 0, 7));
+			return;
+		}
+		if(o == 2 || o == 3){
+			print("movw	%d(pc)[%x], %s\n", 4*IMM(7, 0), 4*IMM(7, 0)+pc+4, REG(10, 8));
+			return;
+		}
+		op = OP6(11, 9);
+		if(*op == 'l')
+			print("%s	[%s, %s], %s\n", op+1, REG(8, 6), REG(5, 3), REG(2, 0));
+		else
+			print("%s	%s, [%s, %s]\n", op+1, REG(2, 0), REG(8, 6), REG(5, 3));
+		return;
+	case 3:
+		op = OP7(12, 11);
+		if(B(12, 11) == 0 || B(12,11) == 1)
+			l = 4;
+		else
+			l = 1;
+		if(*op == 'l')
+			print("%s	%d(%s), %s\n", op+1, l*IMM(10, 6), REG(5, 3), REG(2, 0));
+		else
+			print("%s	%s, %d(%s)\n", op+1, REG(2, 0), l*IMM(10, 6), REG(5, 3));
+		return;
+	case 4:
+		if(B(12, 12) == 0){
+			op = OP8(11, 11);
+			if(*op == 'l')
+				print("%s	%d(%s), %s\n", op+1, 2*IMM(10, 6), REG(5, 3), REG(2, 0));
+			else
+				print("%s	%s, %d(%s)\n", op+1, REG(2, 0), 2*IMM(10, 6), REG(5, 3));
+			return;
+		}
+		op = OP9(11, 11);
+		if(*op == 'l')
+			print("%s	%d(sp), %s\n", op+1, 4*IMM(7, 0), REG(10, 8));
+		else
+			print("%s	%s, %d(sp)\n", op+1, REG(10, 8), 4*IMM(7, 0));
+		return;
+	case 5:
+		if(B(12, 12) == 0){
+			if(B(11, 11) == 0)
+				print("add	%d, pc, %s\n", 4*IMM(7, 0), REG(10, 8));
+			else
+				print("add	%d, sp, %s\n", 4*IMM(7, 0), REG(10, 8));
+			return;
+		}
+		if(B(11, 8) == 0){
+			print("%s	%d, sp\n", OP2(7, 7), 4*IMM(6, 0));
+			return;
+		}
+		SBO(10, 10);
+		SBZ(9, 9);
+		if(B(8, 8) == 0)
+			print("%s	sp, %d\n", OP10(11, 11), IMM(7, 0));
+		else
+			print("%s	sp, %d|15\n", OP10(11, 11), IMM(7, 0));
+		return;
+	case 6:
+		if(B(12, 12) == 0){
+			print("%s	%s, %d\n", OP11(11, 11), REG(10, 8), IMM(7, 0));
+			return;
+		}
+		if(B(11, 8) == 0xf){
+			print("swi	%d\n", IMM(7, 0));
+			return;
+		}
+		o = IMM(7, 0);
+		if(o&0x80)
+			o |= 0xffffff00;
+		o = pc+4+(o<<1);
+		print("b%s	%x\n", COND(11, 8), o);
+		return;
+	case 7:
+		o = B(12, 11);
+		switch(o){
+			case 0:
+				o = IMM(10, 0);
+				if(o&0x400)
+					o |= 0xfffff800;
+				o = pc+4+(o<<1);
+				print("b	%x\n", o);
+				return;
+			case 1:
+				illegal(i, pc);
+				return;
+			case 2:
+				lasto = IMM(10, 0);
+				print("bl\n");
+				return;
+			case 3:
+				if(lasto&0x400)
+					lasto |= 0xfffff800;
+				o = IMM(10, 0);
+				o = (pc-2)+4+(o<<1)+(lasto<<12);
+				print("bl %x\n", o);
+				return;
+		}
+	}
+}