diff options
Diffstat (limited to 'lisc/emit.c')
| -rw-r--r-- | lisc/emit.c | 44 |
1 files changed, 42 insertions, 2 deletions
diff --git a/lisc/emit.c b/lisc/emit.c index a014727..1025ace 100644 --- a/lisc/emit.c +++ b/lisc/emit.c @@ -40,6 +40,36 @@ static char *rtoa[] = { [R15D] = "r15d", }; +static char *rbtoa[] = { + [RXX] = "OH GOD!", + + + [RAX] = "al", + [RCX] = "cl", + [RDX] = "dl", + [RSI] = "sil", + [RDI] = "dil", + [R8] = "r8b", + [R9] = "r9b", + [R10] = "r10b", + [R11] = "r11b", + + [RBX] = "bl", + [R12] = "r12b", + [R13] = "r13b", + [R14] = "r14b", + [R15] = "r15b", + + [RBP] = "bpl", + [RSP] = "spl", + +}; + +static char *ctoa[NCmp] = { + [Ceq] = "e", + [Csle] = "le", +}; + static void eref(Ref r, Fn *fn, FILE *f) { @@ -87,7 +117,7 @@ eop(char *op, Ref a, Ref b, Fn *fn, FILE *f) static void eins(Ins i, Fn *fn, FILE *f) { - static char *opi[] = { + static char *otoa[OLast] = { [OAdd] = "add", [OSub] = "sub", }; @@ -103,7 +133,7 @@ eins(Ins i, Fn *fn, FILE *f) } 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); + eop(otoa[i.op], i.arg[1], i.to, fn, f); break; case OStore: i.to = i.arg[1]; @@ -127,9 +157,19 @@ eins(Ins i, Fn *fn, FILE *f) case OXDiv: eop("idiv", i.arg[0], R, fn, f); break; + case OXCmp: + eop("cmp", i.arg[0], i.arg[1], fn, f); + break; case ONop: break; default: + if (OXSet <= i.op && i.op <= OXSet1) { + eop("mov $0,", i.to, R, fn, f); + fprintf(f, "\tset%s %%%s\n", + ctoa[i.op-OXSet], + rbtoa[BASE(i.to.val)]); + break; + } diag("emit: unhandled instruction (3)"); } } |