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add the mul instruction

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This commit is contained in:
Quentin Carbonneaux 2015-08-16 14:19:54 -04:00
parent 27f4eae43e
commit 7bbd361083
5 changed files with 26 additions and 9 deletions
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17
lisc/emit.c
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@ -137,6 +137,7 @@ eins(Ins i, Fn *fn, FILE *f)
static char *otoa[NOp] = {
[OAdd] = "add",
[OSub] = "sub",
[OMul] = "imul",
[OAnd] = "and",
[OLoad] = "mov",
[OLoadss] = "movsw",
@ -154,10 +155,26 @@ eins(Ins i, Fn *fn, FILE *f)
[OStores - OStorel] = "w",
[OStoreb - OStorel] = "b",
};
Ref r0, r1;
int reg;
int64_t val;
switch (i.op) {
case OMul:
if (rtype(i.arg[1]) == RCon) {
r0 = i.arg[1];
r1 = i.arg[0];
} else {
r0 = i.arg[0];
r1 = i.arg[1];
}
if (rtype(r0) == RCon && rtype(r1) == RTmp) {
val = fn->con[r0.val].val;
fprintf(f, "\timul $%"PRId64", %%%s, %%%s\n",
val, rtoa(r1.val), rtoa(i.to.val));
break;
}
/* fall through */
case OAdd:
case OSub:
case OAnd: