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comparison src/cpu/x86/vm/x86_64.ad @ 403:b744678d4d71

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6752257: Use NOT instead of XOR -1 on x86 Summary: add match rule for xor -1 Reviewed-by: never, kvn
author rasbold
date Fri, 10 Oct 2008 09:47:56 -0700
parents dc7f315e41f7
children 4d9884b01ba6
comparison
equal deleted inserted replaced
402:b4e0a161f551 403:b744678d4d71
9307 opcode(0x33); 9307 opcode(0x33);
9308 ins_encode(REX_reg_reg(dst, src), OpcP, reg_reg(dst, src)); 9308 ins_encode(REX_reg_reg(dst, src), OpcP, reg_reg(dst, src));
9309 ins_pipe(ialu_reg_reg); 9309 ins_pipe(ialu_reg_reg);
9310 %} 9310 %}
9311 9311
9312 // Xor Register with Immediate -1
9313 instruct xorI_rReg_im1(rRegI dst, immI_M1 imm) %{
9314 match(Set dst (XorI dst imm));
9315
9316 format %{ "not $dst" %}
9317 ins_encode %{
9318 __ notl($dst$$Register);
9319 %}
9320 ins_pipe(ialu_reg);
9321 %}
9322
9312 // Xor Register with Immediate 9323 // Xor Register with Immediate
9313 instruct xorI_rReg_imm(rRegI dst, immI src, rFlagsReg cr) 9324 instruct xorI_rReg_imm(rRegI dst, immI src, rFlagsReg cr)
9314 %{ 9325 %{
9315 match(Set dst (XorI dst src)); 9326 match(Set dst (XorI dst src));
9316 effect(KILL cr); 9327 effect(KILL cr);
9525 9536
9526 format %{ "xorq $dst, $src\t# long" %} 9537 format %{ "xorq $dst, $src\t# long" %}
9527 opcode(0x33); 9538 opcode(0x33);
9528 ins_encode(REX_reg_reg_wide(dst, src), OpcP, reg_reg(dst, src)); 9539 ins_encode(REX_reg_reg_wide(dst, src), OpcP, reg_reg(dst, src));
9529 ins_pipe(ialu_reg_reg); 9540 ins_pipe(ialu_reg_reg);
9541 %}
9542
9543 // Xor Register with Immediate -1
9544 instruct xorL_rReg_im1(rRegL dst, immL_M1 imm) %{
9545 match(Set dst (XorL dst imm));
9546
9547 format %{ "notq $dst" %}
9548 ins_encode %{
9549 __ notq($dst$$Register);
9550 %}
9551 ins_pipe(ialu_reg);
9530 %} 9552 %}
9531 9553
9532 // Xor Register with Immediate 9554 // Xor Register with Immediate
9533 instruct xorL_rReg_imm(rRegL dst, immL32 src, rFlagsReg cr) 9555 instruct xorL_rReg_imm(rRegL dst, immL32 src, rFlagsReg cr)
9534 %{ 9556 %{