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Untested and nasty emulated vperm.

This commit is contained in:
Ben Vanik 2013-10-06 10:25:30 -07:00
parent 2b798df631
commit 26e22e2b16
1 changed files with 28 additions and 2 deletions
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30
src/xenia/cpu/x64/x64_emit_altivec.cc
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@ -1171,9 +1171,35 @@ XEEMITTER(vor128, VX128(5, 720), VX128 )(X64Emitter& e, X86Compiler&
return InstrEmit_vor_(e, c, VX128_VD128, VX128_VA128, VX128_VB128);
}
// TODO(benvanik): implement this for real!
__m128i __emulated_vperm(__m128i va, __m128i vb, __m128i vc) {
__m128i result = _mm_setzero_si128();
for (size_t i = 0; i < 16; i++) {
const size_t b = vc.m128i_u8[i] & 0x1F;
result.m128i_u8[i] = b < 16 ?
va.m128i_u8[15 - b] :
vb.m128i_u8[15 - (b - 16)];
}
return result;
}
int InstrEmit_vperm_(X64Emitter& e, X86Compiler& c, uint32_t vd, uint32_t va, uint32_t vb, uint32_t vc) {
XEINSTRNOTIMPLEMENTED();
return 1;
// Call emulation function.
XmmVar tva(c.newXmmVar()), tvb(c.newXmmVar()), tvc(c.newXmmVar());
GpVar pva(c.newGpVar()), pvb(c.newGpVar()), pvc(c.newGpVar());
c.lea(pva, e.vr_value(va).m128());
c.lea(pvb, e.vr_value(vb).m128());
c.lea(pvc, e.vr_value(vc).m128());
XmmVar v(c.newXmmVar());
X86CompilerFuncCall* call = c.call(__emulated_vperm);
uint32_t args[] = {kX86VarTypeGpq, kX86VarTypeGpq, kX86VarTypeGpq};
call->setPrototype(kX86FuncConvDefault, kX86VarTypeXmm, args, XECOUNT(args));
call->setArgument(0, pva);
call->setArgument(1, pvb);
call->setArgument(2, pvc);
call->setReturn(v);
e.update_vr_value(vd, v);
e.TraceVR(vd, va, vb, vc);
return 0;
}
XEEMITTER(vperm, 0x1000002B, VXA )(X64Emitter& e, X86Compiler& c, InstrData& i) {
return InstrEmit_vperm_(e, c, i.VXA.VD, i.VXA.VA, i.VXA.VB, i.VXA.VC);