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start work on word/long handling

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This commit is contained in:
Quentin Carbonneaux 2015-08-01 18:17:06 -04:00
parent dff7044a2c
commit cf307002d9
14 changed files with 114 additions and 81 deletions
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24
lisc/emit.c
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@ -57,15 +57,12 @@ eins(Ins i, Fn *fn, FILE *f)
switch (i.op) {
case OAdd:
case OSub:
if (req(i.to, i.arg[1]))
switch (opdesc[i.op].comm) {
case T:
i.arg[1] = i.arg[0];
i.arg[0] = i.to;
break;
default:
diag("emit: instruction can't be encoded");
}
if (req(i.to, i.arg[1])) {
if (!opdesc[i.op].comm)
diag("emit: unhandled instruction (1)");
i.arg[1] = i.arg[0];
i.arg[0] = i.to;
}
if (!req(i.to, i.arg[0]))
eop("mov", i.arg[0], i.to, fn, f);
eop(opi[i.op], i.arg[1], i.to, fn, f);
@ -81,8 +78,11 @@ eins(Ins i, Fn *fn, FILE *f)
case OSwap:
eop("xchg", i.arg[0], i.arg[1], fn, f);
break;
case OXCltd:
fprintf(f, "\tcltd\n");
case OSign:
if (!req(i.to, SYM(RDX))
|| !req(i.arg[0], SYM(RAX)))
diag("emit: unhandled instruction (2)");
fprintf(f, "\tcqto\n");
break;
case OXDiv:
eop("idiv", i.arg[0], R, fn, f);
@ -90,7 +90,7 @@ eins(Ins i, Fn *fn, FILE *f)
case ONop:
break;
default:
diag("emit: unhandled instruction");
diag("emit: unhandled instruction (3)");
}
}