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addex. All of these are wrong - let's hope we don't overflow.

This commit is contained in:
Ben Vanik 2013-10-19 20:29:19 -07:00
parent 4e6799197f
commit 7ae2d410e5
1 changed files with 32 additions and 2 deletions
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34
src/xenia/cpu/x64/x64_emit_alu.cc
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@ -80,8 +80,38 @@ XEEMITTER(addcx, 0x7C000014, XO )(X64Emitter& e, X86Compiler& c, InstrDat
}
XEEMITTER(addex, 0x7C000114, XO )(X64Emitter& e, X86Compiler& c, InstrData& i) {
XEINSTRNOTIMPLEMENTED();
return 1;
// RD <- (RA) + (RB) + XER[CA]
// Add in carry flag from XER, only if needed.
// It may be possible to do this much more efficiently.
GpVar xer(c.newGpVar());
c.mov(xer, e.xer_value());
c.shr(xer, imm(29));
c.and_(xer, imm(1));
GpVar v(c.newGpVar());
c.mov(v, e.gpr_value(i.XO.RA));
c.add(v, e.gpr_value(i.XO.RB));
c.add(v, xer);
GpVar cc(c.newGpVar());
c.setc(cc.r8());
if (i.XO.OE) {
// With XER update.
XEASSERTALWAYS();
//e.update_xer_with_overflow(EFLAGS OF?);
}
e.update_gpr_value(i.XO.RT, v);
e.update_xer_with_carry(cc);
if (i.XO.Rc) {
// With cr0 update.
e.update_cr_with_cond(0, v);
}
e.clear_constant_gpr_value(i.XO.RT);
return 0;
}
XEEMITTER(addi, 0x38000000, D )(X64Emitter& e, X86Compiler& c, InstrData& i) {