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Fixing EXTRACT.

This commit is contained in:
Ben Vanik 2014-05-30 14:01:52 -07:00
parent 1729c8ce6d
commit 691a3d4ade
1 changed files with 12 additions and 4 deletions
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16
src/alloy/backend/x64/x64_sequences.cc
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@ -48,6 +48,14 @@ static std::unordered_multimap<uint32_t, SequenceSelectFn> sequence_table;
} // namespace
// Selects the right byte/word/etc from a vector. We need to flip logical
// indices (0,1,2,3,4,5,6,7,...) = (3,2,1,0,7,6,5,4,...)
#define VEC128_B(n) ((n) & 0xC) | ((~(n)) & 0x3)
#define VEC128_W(n) ((n) & 0x6) | ((~(n)) & 0x1)
#define VEC128_D(n) (n)
#define VEC128_F(n) (n)
// ============================================================================
// OPCODE_COMMENT
// ============================================================================
@ -4402,7 +4410,7 @@ EMITTER_OPCODE_TABLE(
EMITTER(EXTRACT_I8, MATCH(I<OPCODE_EXTRACT, I8<>, V128<>, I8<>>)) {
static void Emit(X64Emitter& e, const EmitArgType& i) {
if (i.src2.is_constant) {
e.vpextrb(i.dest.reg().cvt32(), i.src1, i.src2.constant());
e.vpextrb(i.dest.reg().cvt32(), i.src1, VEC128_B(i.src2.constant()));
} else {
XEASSERTALWAYS();
}
@ -4411,7 +4419,7 @@ EMITTER(EXTRACT_I8, MATCH(I<OPCODE_EXTRACT, I8<>, V128<>, I8<>>)) {
EMITTER(EXTRACT_I16, MATCH(I<OPCODE_EXTRACT, I16<>, V128<>, I8<>>)) {
static void Emit(X64Emitter& e, const EmitArgType& i) {
if (i.src2.is_constant) {
e.vpextrw(i.dest.reg().cvt32(), i.src1, i.src2.constant());
e.vpextrw(i.dest.reg().cvt32(), i.src1, VEC128_W(i.src2.constant()));
} else {
XEASSERTALWAYS();
}
@ -4426,7 +4434,7 @@ EMITTER(EXTRACT_I32, MATCH(I<OPCODE_EXTRACT, I32<>, V128<>, I8<>>)) {
vec128b(15, 14, 13, 12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
};
if (i.src2.is_constant) {
e.vpextrd(i.dest, i.src1, i.src2.constant());
e.vpextrd(i.dest, i.src1, VEC128_D(i.src2.constant()));
} else {
// Get the desired word in xmm0, then extract that.
// TODO(benvanik): find a better way, this sequence is terrible.
@ -4445,7 +4453,7 @@ EMITTER(EXTRACT_I32, MATCH(I<OPCODE_EXTRACT, I32<>, V128<>, I8<>>)) {
EMITTER(EXTRACT_F32, MATCH(I<OPCODE_EXTRACT, F32<>, V128<>, I8<>>)) {
static void Emit(X64Emitter& e, const EmitArgType& i) {
if (i.src2.is_constant) {
e.vextractps(i.dest, i.src1, i.src2.constant());
e.vextractps(i.dest, i.src1, VEC128_F(i.src2.constant()));
} else {
XEASSERTALWAYS();
}