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new rsval() helper for signed Refs

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The .val field is signed in RSlot.
Add a new dedicated function to
fetch it as a signed int.
This commit is contained in:
Quentin Carbonneaux 2022-12-12 17:36:15 +01:00
parent 2ec355df6a
commit c0f25aeae3
5 changed files with 31 additions and 23 deletions
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12
rv64/emit.c
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@ -116,9 +116,11 @@ static char *rname[] = {
};
static int64_t
slot(int s, Fn *fn)
slot(Ref r, Fn *fn)
{
s = ((int32_t)s << 3) >> 3;
int s;
s = rsval(r);
assert(s <= fn->slot);
if (s < 0)
return 8 * -s;
@ -214,7 +216,7 @@ emitf(char *s, Ins *i, Fn *fn, FILE *f)
}
break;
case RSlot:
offset = slot(r.val, fn);
offset = slot(r, fn);
assert(offset >= -2048 && offset <= 2047);
fprintf(f, "%d(fp)", (int)offset);
break;
@ -286,7 +288,7 @@ fixmem(Ref *pr, Fn *fn, FILE *f)
}
}
if (rtype(r) == RSlot) {
s = slot(r.val, fn);
s = slot(r, fn);
if (s < -2048 || s > 2047) {
fprintf(f, "\tli t6, %"PRId64"\n", s);
fprintf(f, "\tadd t6, fp, t6\n");
@ -369,7 +371,7 @@ emitins(Ins *i, Fn *fn, FILE *f)
case Oaddr:
assert(rtype(i->arg[0]) == RSlot);
rn = rname[i->to.val];
s = slot(i->arg[0].val, fn);
s = slot(i->arg[0], fn);
if (-s < 2048) {
fprintf(f, "\tadd %s, fp, %"PRId64"\n", rn, s);
} else {