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Fixing pack float16.

This commit is contained in:
Ben Vanik 2014-06-20 20:48:02 -07:00
parent da590bd9cc
commit a5448b1296
1 changed files with 14 additions and 2 deletions
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16
src/alloy/backend/x64/x64_sequences.cc
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@ -4733,15 +4733,27 @@ EMITTER(PACK, MATCH(I<OPCODE_PACK, V128<>, V128<>>)) {
static void EmitFLOAT16_2(X64Emitter& e, const EmitArgType& i) {
// http://blogs.msdn.com/b/chuckw/archive/2012/09/11/directxmath-f16c-and-fma.aspx
// dest = [(src1.x | src1.y), 0, 0, 0]
// 0|0|0|0|W|Z|Y|X
e.vcvtps2ph(e.xmm0, i.src1, B00000011);
// Y|X|W|Z|0|0|0|0
e.vpshufd(e.xmm0, e.xmm0, B00011011);
// Shuffle to X|Y|Z|W|0|0|0|0
e.vpshufhw(e.xmm0, e.xmm0, B10110001);
// Select just X|Y
e.vxorps(i.dest, i.dest);
e.vpblendw(i.dest, e.xmm0, B00000011);
e.vpblendw(i.dest, e.xmm0, B11000000);
}
static void EmitFLOAT16_4(X64Emitter& e, const EmitArgType& i) {
// dest = [(src1.x | src1.y), (src1.z | src1.w), 0, 0]
// 0|0|0|0|W|Z|Y|X
e.vcvtps2ph(e.xmm0, i.src1, B00000011);
// Y|X|W|Z|0|0|0|0
e.vpshufd(e.xmm0, e.xmm0, B00011011);
// Shuffle to X|Y|Z|W|0|0|0|0
e.vpshufhw(e.xmm0, e.xmm0, B10110001);
// Select just X|Y|Z|W
e.vxorps(i.dest, i.dest);
e.vpblendw(i.dest, e.xmm0, B00001111);
e.vpblendw(i.dest, e.xmm0, B11110000);
}
static void EmitSHORT_2(X64Emitter& e, const EmitArgType& i) {
XEASSERTALWAYS();