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negx

This commit is contained in:
Ben Vanik 2013-05-25 01:35:19 -07:00
parent 07d0dd98b6
commit 8207bb8088
1 changed files with 16 additions and 15 deletions
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31
src/xenia/cpu/x64/x64_emit_alu.cc
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@ -333,7 +333,6 @@ XEEMITTER(mullwx, 0x7C0001D6, XO )(X64Emitter& e, X86Compiler& c, InstrDat
}
#endif
#if 0
XEEMITTER(negx, 0x7C0000D0, XO )(X64Emitter& e, X86Compiler& c, InstrData& i) {
// RT <- ¬(RA) + 1
@ -344,23 +343,26 @@ XEEMITTER(negx, 0x7C0000D0, XO )(X64Emitter& e, X86Compiler& c, InstrDat
// if RA == 0x8000000000000000 then no-op and set OV=1
// This may just magically do that...
Function* ssub_with_overflow = Intrinsic::getDeclaration(
e.gen_module(), Intrinsic::ssub_with_overflow, jit_type_nint);
jit_value_t v = b.CreateCall2(ssub_with_overflow,
e.get_int64(0), e.gpr_value(i.XO.RA));
jit_value_t v0 = b.CreateExtractValue(v, 0);
e.update_gpr_value(i.XO.RT, v0);
e.update_xer_with_overflow(b.CreateExtractValue(v, 1));
XEASSERTALWAYS();
//Function* ssub_with_overflow = Intrinsic::getDeclaration(
// e.gen_module(), Intrinsic::ssub_with_overflow, jit_type_nint);
//jit_value_t v = b.CreateCall2(ssub_with_overflow,
// e.get_int64(0), e.gpr_value(i.XO.RA));
//jit_value_t v0 = b.CreateExtractValue(v, 0);
//e.update_gpr_value(i.XO.RT, v0);
//e.update_xer_with_overflow(b.CreateExtractValue(v, 1));
if (i.XO.Rc) {
// With cr0 update.
e.update_cr_with_cond(0, v0, e.get_int64(0), true);
}
//if (i.XO.Rc) {
// // With cr0 update.
// e.update_cr_with_cond(0, v0, e.get_int64(0), true);
//}
return 0;
} else {
// No OE bit setting.
jit_value_t v = b.CreateSub(e.get_int64(0), e.gpr_value(i.XO.RA));
GpVar v(c.newGpVar());
c.mov(v, e.gpr_value(i.XO.RA));
c.neg(v);
e.update_gpr_value(i.XO.RT, v);
if (i.XO.Rc) {
@ -371,7 +373,6 @@ XEEMITTER(negx, 0x7C0000D0, XO )(X64Emitter& e, X86Compiler& c, InstrDat
return 0;
}
}
#endif
XEEMITTER(subfx, 0x7C000050, XO )(X64Emitter& e, X86Compiler& c, InstrData& i) {
// RT <- ¬(RA) + (RB) + 1
@ -1076,7 +1077,7 @@ void X64RegisterEmitCategoryALU() {
XEREGISTERINSTR(mulldx, 0x7C0001D2);
XEREGISTERINSTR(mulli, 0x1C000000);
// XEREGISTERINSTR(mullwx, 0x7C0001D6);
// XEREGISTERINSTR(negx, 0x7C0000D0);
XEREGISTERINSTR(negx, 0x7C0000D0);
XEREGISTERINSTR(subfx, 0x7C000050);
XEREGISTERINSTR(subfcx, 0x7C000010);
XEREGISTERINSTR(subficx, 0x20000000);