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/*
* code to keep track of registers
*/
#include "defs.h"
#include "fns.h"
/*
* translate a name to a magic register offset
*/
Reglist*
rname(char *name)
{
Reglist *rp;
for (rp = mach->reglist; rp->rname; rp++)
if (strcmp(name, rp->rname) == 0)
return rp;
return 0;
}
static uvlong
getreg(Map *map, Reglist *rp)
{
uvlong v;
ulong w;
ushort s;
int ret;
v = 0;
ret = 0;
switch (rp->rformat)
{
case 'x':
ret = get2(map, rp->roffs, &s);
v = s;
break;
case 'f':
case 'X':
ret = get4(map, rp->roffs, &w);
v = w;
break;
case 'F':
case 'W':
case 'Y':
ret = get8(map, rp->roffs, &v);
break;
default:
werrstr("can't retrieve register %s", rp->rname);
error("%r");
}
if (ret < 0) {
werrstr("Register %s: %r", rp->rname);
error("%r");
}
return v;
}
uvlong
rget(Map *map, char *name)
{
Reglist *rp;
rp = rname(name);
if (!rp)
error("invalid register name");
return getreg(map, rp);
}
void
rput(Map *map, char *name, vlong v)
{
Reglist *rp;
int ret;
rp = rname(name);
if (!rp)
error("invalid register name");
if (rp->rflags & RRDONLY)
error("register is read-only");
switch (rp->rformat)
{
case 'x':
ret = put2(map, rp->roffs, (ushort) v);
break;
case 'X':
case 'f':
case 'F':
ret = put4(map, rp->roffs, (long) v);
break;
case 'Y':
ret = put8(map, rp->roffs, v);
break;
default:
ret = -1;
}
if (ret < 0)
error("can't write register");
}
/*
* print the registers
*/
void
printregs(int c)
{
Reglist *rp;
int i;
uvlong v;
for (i = 1, rp = mach->reglist; rp->rname; rp++, i++) {
if ((rp->rflags & RFLT)) {
if (c != 'R')
continue;
if (rp->rformat == '8' || rp->rformat == '3')
continue;
}
v = getreg(cormap, rp);
if(rp->rformat == 'Y')
dprint("%-8s %-20#llux", rp->rname, v);
else
dprint("%-8s %-12#lux", rp->rname, (ulong)v);
if ((i % 3) == 0) {
dprint("\n");
i = 0;
}
}
if (i != 1)
dprint("\n");
dprint ("%s\n", machdata->excep(cormap, rget));
printpc();
}
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