diff options
Diffstat (limited to 'lisc/emit.c')
| -rw-r--r-- | lisc/emit.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/lisc/emit.c b/lisc/emit.c index a006c12..4d2bb42 100644 --- a/lisc/emit.c +++ b/lisc/emit.c @@ -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)"); } } |