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Update x64_sequences.cc

This commit is contained in:
hlide 2014-05-31 16:51:15 +02:00
parent 334f744fb8
commit 8525cf739e
1 changed files with 5 additions and 5 deletions
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10
src/alloy/backend/x64/x64_sequences.cc
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@ -3269,7 +3269,7 @@ EMITTER_OPCODE_TABLE(
// OPCODE_MUL_ADD
// ============================================================================
// d = 1 * 2 + 3
// $0 = $1×$0 + $2
// $0 = $1<EFBFBD>$0 + $2
// TODO(benvanik): use other forms (132/213/etc) to avoid register shuffling.
// dest could be src2 or src3 - need to ensure it's not before overwriting dest
// perhaps use other 132/213/etc
@ -3332,7 +3332,7 @@ EMITTER_OPCODE_TABLE(
// OPCODE_MUL_SUB
// ============================================================================
// d = 1 * 2 - 3
// $0 = $2×$0 - $3
// $0 = $2<EFBFBD>$0 - $3
// TODO(benvanik): use other forms (132/213/etc) to avoid register shuffling.
// dest could be src2 or src3 - need to ensure it's not before overwriting dest
// perhaps use other 132/213/etc
@ -4445,7 +4445,7 @@ EMITTER(EXTRACT_I16, MATCH(I<OPCODE_EXTRACT, I16<>, V128<>, I8<>>)) {
e.vpextrw(i.dest.reg().cvt32(), i.src1, VEC128_W(i.src2.constant()));
} else {
// TODO(benvanik): try out hlide's version:
// e.mov(e.eax, 7);
// e.mov(e.eax, 7);
// e.and(e.al, i.src2); // eax = [i&7, 0, 0, 0]
// e.imul(e.eax, 0x00000202); // [(i&7)*2, (i&7)*2, 0, 0]
// e.xor(e.eax, 0x80800203); // [((i&7)*2)^3, ((i&7)*2)^2, 0x80, 0x80]
@ -4468,7 +4468,7 @@ EMITTER(EXTRACT_I32, MATCH(I<OPCODE_EXTRACT, I32<>, V128<>, I8<>>)) {
e.vpextrd(i.dest, i.src1, VEC128_D(i.src2.constant()));
} else {
// TODO(benvanik): try out hlide's version:
// e.mov(e.eax, 3);
// e.mov(e.eax, 3);
// e.and(e.al, i.src2); // eax = [(i&3), 0, 0, 0]
// e.imul(e.eax, 0x04040404); // [(i&3)*4, (i&3)*4, (i&3)*4, (i&3)*4]
// e.add(e.eax, 0x00010203); // [((i&3)*4)+3, ((i&3)*4)+2, ((i&3)*4)+1, ((i&3)*4)+0]
@ -4495,7 +4495,7 @@ EMITTER(EXTRACT_F32, MATCH(I<OPCODE_EXTRACT, F32<>, V128<>, I8<>>)) {
} else {
XEASSERTALWAYS();
// TODO(benvanik): try out hlide's version:
// e.mov(e.eax, 3);
// e.mov(e.eax, 3);
// e.and(e.al, i.src2); // eax = [(i&3), 0, 0, 0]
// e.imul(e.eax, 0x04040404); // [(i&3)*4, (i&3)*4, (i&3)*4, (i&3)*4]
// e.add(e.eax, 0x00010203); // [((i&3)*4)+3, ((i&3)*4)+2, ((i&3)*4)+1, ((i&3)*4)+0]