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uniformize sign extension and mem loads

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This commit is contained in:
Quentin Carbonneaux 2015-10-19 17:28:21 -04:00
parent a655b8b3eb
commit 7c6fadc6ba
4 changed files with 60 additions and 72 deletions
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37
lisc/emit.c
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@ -152,13 +152,13 @@ eins(Ins i, Fn *fn, FILE *f)
[OSub] = "sub",
[OMul] = "imul",
[OAnd] = "and",
[OSext] = "movsl",
[OZext] = "movzl",
[OLoad] = "mov",
[OLoadsh] = "movsw",
[OLoaduh] = "movzw",
[OLoadsb] = "movsb",
[OLoadub] = "movzb",
[OLoad+Tl] = "mov",
[OLoad+Tsw] = "movsl",
/* [OLoad+Tuw] treated manually */
[OLoad+Tsh] = "movsw",
[OLoad+Tuh] = "movzw",
[OLoad+Tsb] = "movsb",
[OLoad+Tub] = "movzb",
};
Ref r0, r1;
int64_t val;
@ -197,11 +197,6 @@ eins(Ins i, Fn *fn, FILE *f)
emitf(fn, f, "%s%w %R, %R", otoa[i.op],
i.wide, i.arg[1], i.to);
break;
case OSext:
case OZext:
emitf(fn, f, "%sq %R, %W%R", otoa[i.op],
i.arg[0], i.wide, i.to);
break;
case OCopy:
if (req(i.to, R) || req(i.arg[0], R))
break;
@ -223,11 +218,19 @@ eins(Ins i, Fn *fn, FILE *f)
emitf(fn, f, "mov%t %R, %M",
i.op - OStorel, i.arg[0], i.arg[1]);
break;
case OLoad:
case OLoadsh:
case OLoaduh:
case OLoadsb:
case OLoadub:
case OLoad+Tuw:
emitf(fn, f, "movl %M, %R", i.arg[0], i.to);
break;
case OLoad+Tsw:
if (i.wide == 0) {
emitf(fn, f, "movl %M, %R", i.arg[0], i.to);
break;
}
case OLoad+Tl:
case OLoad+Tsh:
case OLoad+Tuh:
case OLoad+Tsb:
case OLoad+Tub:
emitf(fn, f, "%s%w %M, %R", otoa[i.op],
i.wide, i.arg[0], i.to);
break;