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start function call lowering (wip)

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This commit is contained in:
Quentin Carbonneaux 2015-09-10 22:55:03 -04:00
parent 7e86fc39fc
commit 8201c6161e
4 changed files with 249 additions and 33 deletions
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20
lisc/emit.c
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@ -221,11 +221,8 @@ eins(Ins i, Fn *fn, FILE *f)
emitf(fn, f, "\t%s%w %M, %R\n", otoa[i.op],
i.wide, i.arg[0], i.to);
break;
case OAlloc:
emitf(fn, f, "\tsub%w %R, %R\n",
1, i.arg[0], TMP(RSP));
emitf(fn, f, "\tmov%w %R, %R\n",
1, TMP(RSP), i.to);
case OCall:
emitf(fn, f, "\tcall%w %R\n", 1, i.arg[0]);
break;
case OAddr:
emitf(fn, f, "\tlea%w %M, %R\n",
@ -244,6 +241,19 @@ eins(Ins i, Fn *fn, FILE *f)
} else
diag("emit: unhandled instruction (2)");
break;
case OSAlloc:
emitf(fn, f, "\tsub%w %R, %R\n",
1, i.arg[0], TMP(RSP));
if (!req(i.to, R))
emitf(fn, f, "\tmov%w %R, %R\n",
1, TMP(RSP), i.to);
break;
case OXPush:
emitf(fn, f, "\tpush%w %R\n", 1, i.arg[0]);
break;
case OXMovs:
emitf(fn, f, "\trep movsb\n");
break;
case OXDiv:
emitf(fn, f, "\tidiv%w %R\n", i.wide, i.arg[0]);
break;