Mercurial > hg > truffle
diff src/cpu/x86/vm/assembler_x86.cpp @ 7637:b30b3c2a0cf2
6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
Summary: Use SSE4.2 and AVX2 instructions for encodeArray intrinsic.
Reviewed-by: roland
| author | kvn |
|---|---|
| date | Tue, 22 Jan 2013 15:34:16 -0800 |
| parents | 038dd2875b94 |
| children | 3ac7d10a6572 8391fdd36e1f |
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--- a/src/cpu/x86/vm/assembler_x86.cpp Tue Jan 22 11:31:25 2013 -0800 +++ b/src/cpu/x86/vm/assembler_x86.cpp Tue Jan 22 15:34:16 2013 -0800 @@ -2263,6 +2263,18 @@ emit_simd_arith(0x67, dst, src, VEX_SIMD_66); } +void Assembler::vpackuswb(XMMRegister dst, XMMRegister nds, XMMRegister src, bool vector256) { + assert(VM_Version::supports_avx() && !vector256 || VM_Version::supports_avx2(), "256 bit integer vectors requires AVX2"); + emit_vex_arith(0x67, dst, nds, src, VEX_SIMD_66, vector256); +} + +void Assembler::vpermq(XMMRegister dst, XMMRegister src, int imm8, bool vector256) { + int encode = simd_prefix_and_encode(dst, xnoreg, src, VEX_SIMD_66, VEX_OPCODE_0F_3A, true, vector256); + emit_int8(0x00); + emit_int8(0xC0 | encode); + emit_int8(imm8); +} + void Assembler::pcmpestri(XMMRegister dst, Address src, int imm8) { assert(VM_Version::supports_sse4_2(), ""); InstructionMark im(this); @@ -2475,7 +2487,7 @@ assert(dst != xnoreg, "sanity"); int dst_enc = dst->encoding(); // swap src<->dst for encoding - vex_prefix(src, dst_enc, dst_enc, VEX_SIMD_66, VEX_OPCODE_0F_38, false, vector256); + vex_prefix(src, 0, dst_enc, VEX_SIMD_66, VEX_OPCODE_0F_38, false, vector256); emit_int8(0x17); emit_operand(dst, src); }