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Fixing permute functions.

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This commit is contained in:
Ben Vanik
2013-12-14 06:24:29 -08:00
parent a1f41c656a
commit 21d1e7236b
3 changed files with 20 additions and 18 deletions
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16
src/alloy/frontend/ppc/ppc_emit_altivec.cc
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@@ -801,7 +801,7 @@ int InstrEmit_vmrghw_(PPCFunctionBuilder& f, uint32_t vd, uint32_t va, uint32_t
// (VD.z) = (VA.y)
// (VD.w) = (VB.y)
Value* v = f.Permute(
f.LoadConstant(0x05010400),
f.LoadConstant(0x00040105),
f.LoadVR(va),
f.LoadVR(vb),
INT32_TYPE);
@@ -831,7 +831,7 @@ int InstrEmit_vmrglw_(PPCFunctionBuilder& f, uint32_t vd, uint32_t va, uint32_t
// (VD.z) = (VA.w)
// (VD.w) = (VB.w)
Value* v = f.Permute(
f.LoadConstant(0x07030602),
f.LoadConstant(0x02060307),
f.LoadVR(va),
f.LoadVR(vb),
INT32_TYPE);
@@ -1164,7 +1164,11 @@ XEEMITTER(vrlw128, VX128(6, 80), VX128 )(PPCFunctionBuilder& f, Inst
XEEMITTER(vrlimi128, VX128_4(6, 1808), VX128_4)(PPCFunctionBuilder& f, InstrData& i) {
const uint32_t vd = i.VX128_4.VD128l | (i.VX128_4.VD128h << 5);
const uint32_t vb = i.VX128_4.VB128l | (i.VX128_4.VB128h << 5);
uint32_t blend_mask = i.VX128_4.IMM;
uint32_t blend_mask_src = i.VX128_4.IMM;
uint32_t blend_mask = 0;
for (int n = 0; n < 4; n++) {
blend_mask |= ((blend_mask_src >> n) ? n : (n + 4)) << ((3 - n) * 8);
}
uint32_t rotate = i.VX128_4.z;
// This is just a fancy permute.
// X Y Z W, rotated left by 2 = Z W X Y
@@ -1193,8 +1197,10 @@ XEEMITTER(vrlimi128, VX128_4(6, 1808), VX128_4)(PPCFunctionBuilder& f, Inst
} else {
v = f.LoadVR(vb);
}
v = f.Permute(
f.LoadConstant(blend_mask), v, f.LoadVR(vd), FLOAT32_TYPE);
if (blend_mask != 0x00010203) {
v = f.Permute(
f.LoadConstant(blend_mask), v, f.LoadVR(vd), INT32_TYPE);
}
f.StoreVR(vd, v);
return 0;
}