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subfx + subficx.

This commit is contained in:
Ben Vanik 2013-05-24 19:16:01 -07:00
parent 69ebedb43f
commit 8976f1b046
1 changed files with 29 additions and 40 deletions
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57
src/xenia/cpu/x64/x64_emit_alu.cc
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@ -368,20 +368,22 @@ XEEMITTER(negx, 0x7C0000D0, XO )(X64Emitter& e, X86Compiler& c, InstrDat
}
#endif
#if 0
XEEMITTER(subfx, 0x7C000050, XO )(X64Emitter& e, X86Compiler& c, InstrData& i) {
// RT <- ¬(RA) + (RB) + 1
GpVar v(c.newGpVar());
c.mov(v, e.gpr_value(i.XO.RA));
c.neg(v);
c.stc(); // Always carrying.
c.adc(v, e.gpr_value(i.XO.RB));
e.update_gpr_value(i.XO.RT, v);
if (i.XO.OE) {
// With XER update.
// This is a different codepath as we need to use llvm.ssub.with.overflow.
// TODO(benvanik): handle overflow exceptions.
jit_value_t v = jit_insn_sub_ovf(f,
e.make_signed(e.gpr_value(i.XO.RB)),
e.make_signed(e.gpr_value(i.XO.RA)));
e.update_gpr_value(i.XO.RT, v);
//e.update_xer_with_overflow(b.CreateExtractValue(v, 1));
XEASSERTALWAYS();
//e.update_xer_with_overflow(EFLAGS??);
}
if (i.XO.Rc) {
// With cr0 update.
@ -389,42 +391,29 @@ XEEMITTER(subfx, 0x7C000050, XO )(X64Emitter& e, X86Compiler& c, InstrDat
}
return 0;
} else {
// No OE bit setting.
jit_value_t v = jit_insn_sub(f,
e.make_signed(e.gpr_value(i.XO.RB)),
e.make_signed(e.gpr_value(i.XO.RA)));
e.update_gpr_value(i.XO.RT, v);
if (i.XO.Rc) {
// With cr0 update.
e.update_cr_with_cond(0, v);
}
return 0;
}
}
#endif
XEEMITTER(subfcx, 0x7C000010, XO )(X64Emitter& e, X86Compiler& c, InstrData& i) {
XEINSTRNOTIMPLEMENTED();
return 1;
}
#if 0
XEEMITTER(subficx, 0x20000000, D )(X64Emitter& e, X86Compiler& c, InstrData& i) {
// RT <- ¬(RA) + EXTS(SI) + 1
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(XEEXTS16(i.D.DS)), e.gpr_value(i.D.RA));
e.update_gpr_value(i.D.RT, b.CreateExtractValue(v, 0));
e.update_xer_with_carry(b.CreateExtractValue(v, 1));
GpVar v(c.newGpVar());
c.mov(v, e.gpr_value(i.D.RA));
c.neg(v);
c.stc(); // Always carrying.
c.adc(v, imm(XEEXTS16(i.D.DS)));
GpVar cc(c.newGpVar());
c.setc(cc);
e.update_gpr_value(i.D.RT, v);
e.update_xer_with_carry(cc);
return 0;
}
#endif
XEEMITTER(subfex, 0x7C000110, XO )(X64Emitter& e, X86Compiler& c, InstrData& i) {
// RT <- ¬(RA) + (RB) + CA
@ -1102,9 +1091,9 @@ void X64RegisterEmitCategoryALU() {
XEREGISTERINSTR(mulli, 0x1C000000);
// XEREGISTERINSTR(mullwx, 0x7C0001D6);
// XEREGISTERINSTR(negx, 0x7C0000D0);
// XEREGISTERINSTR(subfx, 0x7C000050);
XEREGISTERINSTR(subfx, 0x7C000050);
XEREGISTERINSTR(subfcx, 0x7C000010);
// XEREGISTERINSTR(subficx, 0x20000000);
XEREGISTERINSTR(subficx, 0x20000000);
XEREGISTERINSTR(subfex, 0x7C000110);
XEREGISTERINSTR(subfmex, 0x7C0001D0);
XEREGISTERINSTR(subfzex, 0x7C000190);