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Special casing some VC++ traps.

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This commit is contained in:
Ben Vanik
2014-07-08 16:01:40 -07:00
parent ef75042f38
commit 2a68a1b35b
7 changed files with 47 additions and 21 deletions
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8
src/alloy/frontend/ppc/ppc_emit_control.cc
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@@ -400,7 +400,7 @@ XEEMITTER(sc, 0x44000002, SC )(PPCHIRBuilder& f, InstrData& i) {
// Trap (A-25)
int InstrEmit_trap(PPCHIRBuilder& f, InstrData& i,
Value* va, Value* vb, uint32_t TO) {
Value* va, Value* vb, uint32_t TO) {
// if (a < b) & TO[0] then TRAP
// if (a > b) & TO[1] then TRAP
// if (a = b) & TO[2] then TRAP
@@ -482,6 +482,12 @@ XEEMITTER(twi, 0x0C000000, D )(PPCHIRBuilder& f, InstrData& i) {
// if (a = EXTS(SI)) & TO[2] then TRAP
// if (a <u EXTS(SI)) & TO[3] then TRAP
// if (a >u EXTS(SI)) & TO[4] then TRAP
if (i.D.RA == 0 && i.D.RT == 0x1F) {
// This is a special trap. Probably.
uint16_t type = (uint16_t)XEEXTS16(i.D.DS);
f.Trap(type);
return 0;
}
Value* ra = f.SignExtend(f.Truncate(
f.LoadGPR(i.D.RA), INT32_TYPE), INT64_TYPE);
Value* rb = f.LoadConstant(XEEXTS16(i.D.DS));