Import sources from 2011-03-30 iso image

1 files changed, 524 insertions, 0 deletions

diff --git a/sys/src/cmd/kl/span.c b/sys/src/cmd/kl/span.c
new file mode 100755
index 000000000..a788b8d37
--- /dev/null
+++ b/sys/src/cmd/kl/span.c
@@ -0,0 +1,524 @@
+#include	"l.h"
+
+void
+span(void)
+{
+	Prog *p;
+	Sym *setext;
+	Optab *o;
+	int m;
+	long c;
+
+	if(debug['v'])
+		Bprint(&bso, "%5.2f span\n", cputime());
+	Bflush(&bso);
+	c = INITTEXT;
+	for(p = firstp; p != P; p = p->link) {
+		p->pc = c;
+		o = oplook(p);
+		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;
+			}
+			if(p->as != ANOP)
+				diag("zero-width instruction\n%P", p);
+			continue;
+		}
+		c += m;
+	}
+	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);
+}
+		
+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;
+}
+
+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_FREG:
+		return C_FREG;
+
+	case D_CREG:
+		return C_CREG;
+
+	case D_PREG:
+		if(a->reg == D_FSR)
+			return C_FSR;
+		if(a->reg == D_FPQ)
+			return C_FQ;
+		return C_PREG;
+
+	case D_OREG:
+		switch(a->name) {
+		case D_EXTERN:
+		case D_STATIC:
+			if(a->sym == S)
+				break;
+			t = a->sym->type;
+			if(t == 0 || t == SXREF) {
+				diag("undefined external: %s in %s",
+					a->sym->name, TNAME);
+				a->sym->type = SDATA;
+			}
+			instoffset = a->sym->value + a->offset - BIG;
+			if(instoffset >= -BIG && instoffset < BIG) {
+				if(instoffset & 7)
+					return C_OSEXT;
+				return C_ESEXT;
+			}
+			if(instoffset & 7)
+				return C_OLEXT;
+			return C_ELEXT;
+		case D_AUTO:
+			instoffset = autosize + a->offset;
+			goto dauto;
+
+		case D_PARAM:
+			instoffset = autosize + a->offset + 4L;
+		dauto:
+			if(instoffset >= -BIG && instoffset < BIG) {
+				if(instoffset & 7)
+					return C_OSAUTO;
+				return C_ESAUTO;
+			}
+			if(instoffset & 7)
+				return C_OLAUTO;
+			return C_ELAUTO;
+		case D_NONE:
+			instoffset = a->offset;
+			if(instoffset == 0)
+				return C_ZOREG;
+			if(instoffset >= -BIG && instoffset < BIG)
+				return C_SOREG;
+			return C_LOREG;
+		}
+		return C_GOK;
+
+	case D_ASI:
+		if(a->name == D_NONE)
+			return C_ASI;
+		return C_GOK;
+
+	case D_CONST:
+		switch(a->name) {
+
+		case D_NONE:
+			instoffset = a->offset;
+		consize:
+			if(instoffset == 0)
+				return C_ZCON;
+			if(instoffset >= -0x1000 && instoffset <= 0xfff)
+				return C_SCON;
+			if((instoffset & 0x3ff) == 0)
+				return C_UCON;
+			return C_LCON;
+
+		case D_EXTERN:
+		case D_STATIC:
+			s = a->sym;
+			if(s == S)
+				break;
+			t = s->type;
+			if(t == 0 || t == SXREF) {
+				diag("undefined external: %s in %s",
+					s->name, TNAME);
+				s->type = SDATA;
+			}
+			if(s->type == STEXT || s->type == SLEAF) {
+				instoffset = s->value + a->offset;
+				return C_LCON;
+			}
+			if(s->type == SCONST) {
+				instoffset = s->value + a->offset;
+				goto consize;
+			}
+			instoffset = s->value + a->offset - BIG;
+			if(instoffset >= -BIG && instoffset < BIG && instoffset != 0)
+				return C_SECON;
+			instoffset = s->value + a->offset + INITDAT;
+/* not sure why this barfs */
+return C_LCON;
+/*
+			if(instoffset == 0)
+				return C_ZCON;
+			if(instoffset >= -0x1000 && instoffset <= 0xfff)
+				return C_SCON;
+			if((instoffset & 0x3ff) == 0)
+				return C_UCON;
+			return C_LCON;
+*/
+
+		case D_AUTO:
+			instoffset = autosize + a->offset;
+			if(instoffset >= -BIG && instoffset < BIG)
+				return C_SACON;
+			return C_LACON;
+
+		case D_PARAM:
+			instoffset = autosize + a->offset + 4L;
+			if(instoffset >= -BIG && instoffset < BIG)
+				return C_SACON;
+			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;
+
+	a1 = p->optab;
+	if(a1)
+		return optab+(a1-1);
+	a1 = p->from.class;
+	if(a1 == 0) {
+		a1 = aclass(&p->from) + 1;
+		p->from.class = a1;
+	}
+	a1--;
+	a3 = p->to.class;
+	if(a3 == 0) {
+		a3 = aclass(&p->to) + 1;
+		p->to.class = a3;
+	}
+	a3--;
+	a2 = C_NONE;
+	if(p->reg != NREG)
+		a2 = C_REG;
+	r = p->as;
+	o = oprange[r].start;
+	if(o == 0)
+		o = oprange[r].stop; /* just generate an error */
+	e = oprange[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-optab)+1;
+			return o;
+		}
+	diag("illegal combination %A %d %d %d",
+		p->as, a1, a2, a3);
+	if(1||!debug['a'])
+		prasm(p);
+	if(o == 0)
+		errorexit();
+	return o;
+}
+
+int
+cmp(int a, int b)
+{
+
+	if(a == b)
+		return 1;
+	switch(a) {
+	case C_LCON:
+		if(b == C_ZCON || b == C_SCON || b == C_UCON)
+			return 1;
+		break;
+	case C_UCON:
+		if(b == C_ZCON)
+			return 1;
+		break;
+	case C_SCON:
+		if(b == C_ZCON)
+			return 1;
+		break;
+	case C_LACON:
+		if(b == C_SACON)
+			return 1;
+		break;
+	case C_LBRA:
+		if(b == C_SBRA)
+			return 1;
+		break;
+	case C_ELEXT:
+		if(b == C_ESEXT)
+			return 1;
+		break;
+	case C_LEXT:
+		if(b == C_SEXT ||
+		   b == C_ESEXT || b == C_OSEXT ||
+		   b == C_ELEXT || b == C_OLEXT)
+			return 1;
+		break;
+	case C_SEXT:
+		if(b == C_ESEXT || b == C_OSEXT)
+			return 1;
+		break;
+	case C_ELAUTO:
+		if(b == C_ESAUTO)
+			return 1;
+		break;
+	case C_LAUTO:
+		if(b == C_SAUTO ||
+		   b == C_ESAUTO || b == C_OSAUTO ||
+		   b == C_ELAUTO || b == C_OLAUTO)
+			return 1;
+		break;
+	case C_SAUTO:
+		if(b == C_ESAUTO || b == C_OSAUTO)
+			return 1;
+		break;
+	case C_REG:
+		if(b == C_ZCON)
+			return 1;
+		break;
+	case C_LOREG:
+		if(b == C_ZOREG || b == C_SOREG)
+			return 1;
+		break;
+	case C_SOREG:
+		if(b == C_ZOREG)
+			return 1;
+		break;
+
+	case C_ANY:
+		return 1;
+	}
+	return 0;
+}
+
+int
+ocmp(const void *a1, const void *a2)
+{
+	Optab *p1, *p2;
+	int n;
+
+	p1 = (Optab*)a1;
+	p2 = (Optab*)a2;
+	n = p1->as - p2->as;
+	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;
+
+	for(i=0; i<C_NCLASS; i++)
+		for(n=0; n<C_NCLASS; n++)
+			xcmp[i][n] = cmp(n, i);
+	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:
+			diag("unknown op in build: %A", r);
+			errorexit();
+		case AADD:
+			oprange[AADDX] = oprange[r];
+			oprange[ASUB] = oprange[r];
+			oprange[ASUBX] = oprange[r];
+			oprange[AMUL] = oprange[r];
+			oprange[AXOR] = oprange[r];
+			oprange[AXNOR] = oprange[r];
+			oprange[AAND] = oprange[r];
+			oprange[AANDN] = oprange[r];
+			oprange[AOR] = oprange[r];
+			oprange[AORN] = oprange[r];
+			oprange[ASLL] = oprange[r];
+			oprange[ASRL] = oprange[r];
+			oprange[ASRA] = oprange[r];
+			oprange[AADDCC] = oprange[r];
+			oprange[AADDXCC] = oprange[r];
+			oprange[ATADDCC] = oprange[r];
+			oprange[ATADDCCTV] = oprange[r];
+			oprange[ASUBCC] = oprange[r];
+			oprange[ASUBXCC] = oprange[r];
+			oprange[ATSUBCC] = oprange[r];
+			oprange[ATSUBCCTV] = oprange[r];
+			oprange[AXORCC] = oprange[r];
+			oprange[AXNORCC] = oprange[r];
+			oprange[AANDCC] = oprange[r];
+			oprange[AANDNCC] = oprange[r];
+			oprange[AORCC] = oprange[r];
+			oprange[AORNCC] = oprange[r];
+			oprange[AMULSCC] = oprange[r];
+			oprange[ASAVE] = oprange[r];
+			oprange[ARESTORE] = oprange[r];
+			break;
+		case AMOVB:
+			oprange[AMOVH] = oprange[r];
+			oprange[AMOVHU] = oprange[r];
+			oprange[AMOVBU] = oprange[r];
+			oprange[ASWAP] = oprange[r];
+			oprange[ATAS] = oprange[r];
+			break;
+		case ABA:
+			oprange[ABN] = oprange[r];
+			oprange[AFBA] = oprange[r];
+			oprange[AFBN] = oprange[r];
+			break;
+		case ABE:
+			oprange[ABCC] = oprange[r];
+			oprange[ABCS] = oprange[r];
+			oprange[ABGE] = oprange[r];
+			oprange[ABGU] = oprange[r];
+			oprange[ABG] = oprange[r];
+			oprange[ABLEU] = oprange[r];
+			oprange[ABLE] = oprange[r];
+			oprange[ABL] = oprange[r];
+			oprange[ABNEG] = oprange[r];
+			oprange[ABNE] = oprange[r];
+			oprange[ABPOS] = oprange[r];
+			oprange[ABVC] = oprange[r];
+			oprange[ABVS] = oprange[r];
+
+			oprange[AFBE] = oprange[r];
+			oprange[AFBG] = oprange[r];
+			oprange[AFBGE] = oprange[r];
+			oprange[AFBL] = oprange[r];
+			oprange[AFBLE] = oprange[r];
+			oprange[AFBLG] = oprange[r];
+			oprange[AFBNE] = oprange[r];
+			oprange[AFBO] = oprange[r];
+			oprange[AFBU] = oprange[r];
+			oprange[AFBUE] = oprange[r];
+			oprange[AFBUG] = oprange[r];
+			oprange[AFBUGE] = oprange[r];
+			oprange[AFBUL] = oprange[r];
+			oprange[AFBULE] = oprange[r];
+			break;
+		case ATA:
+			oprange[ATCC] = oprange[r];
+			oprange[ATCS] = oprange[r];
+			oprange[ATE] = oprange[r];
+			oprange[ATGE] = oprange[r];
+			oprange[ATGU] = oprange[r];
+			oprange[ATG] = oprange[r];
+			oprange[ATLEU] = oprange[r];
+			oprange[ATLE] = oprange[r];
+			oprange[ATL] = oprange[r];
+			oprange[ATNEG] = oprange[r];
+			oprange[ATNE] = oprange[r];
+			oprange[ATN] = oprange[r];
+			oprange[ATPOS] = oprange[r];
+			oprange[ATVC] = oprange[r];
+			oprange[ATVS] = oprange[r];
+			break;
+		case AFADDD:
+			oprange[AFADDF] = oprange[r];
+			oprange[AFADDX] = oprange[r];
+			oprange[AFDIVD] = oprange[r];
+			oprange[AFDIVF] = oprange[r];
+			oprange[AFDIVX] = oprange[r];
+			oprange[AFMULD] = oprange[r];
+			oprange[AFMULF] = oprange[r];
+			oprange[AFMULX] = oprange[r];
+			oprange[AFSUBD] = oprange[r];
+			oprange[AFSUBF] = oprange[r];
+			oprange[AFSUBX] = oprange[r];
+			break;
+		case AFCMPD:
+			oprange[AFCMPF] = oprange[r];
+			oprange[AFCMPX] = oprange[r];
+			oprange[AFCMPED] = oprange[r];
+			oprange[AFCMPEF] = oprange[r];
+			oprange[AFCMPEX] = oprange[r];
+			break;
+		case AFABSF:
+			oprange[AFMOVDF] = oprange[r];
+			oprange[AFMOVDW] = oprange[r];
+			oprange[AFMOVFD] = oprange[r];
+			oprange[AFMOVFW] = oprange[r];
+			oprange[AFMOVWD] = oprange[r];
+			oprange[AFMOVWF] = oprange[r];
+			oprange[AFNEGF] = oprange[r];
+			oprange[AFSQRTD] = oprange[r];
+			oprange[AFSQRTF] = oprange[r];
+			break;
+		case AFMOVF:
+		case AFMOVD:
+		case AMOVW:
+		case AMOVD:
+		case AWORD:
+		case ARETT:
+		case AJMPL:
+		case AJMP:
+		case ACMP:
+		case ANOP:
+		case ATEXT:
+		case ADIV:
+		case ADIVL:
+		case AMOD:
+		case AMODL:
+			break;
+		}
+	}
+}