Mercurial > hg > graal-jvmci-8
changeset 403:b744678d4d71
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 | b4e0a161f551 |
children | 78c058bc5cdc |
files | src/cpu/x86/vm/x86_32.ad src/cpu/x86/vm/x86_64.ad |
diffstat | 2 files changed, 56 insertions(+), 0 deletions(-) [+] |
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--- a/src/cpu/x86/vm/x86_32.ad Mon Oct 06 13:11:32 2008 -0700 +++ b/src/cpu/x86/vm/x86_32.ad Fri Oct 10 09:47:56 2008 -0700 @@ -4810,6 +4810,16 @@ interface(CONST_INTER); %} +// Long Immediate zero +operand immL_M1() %{ + predicate( n->get_long() == -1L ); + match(ConL); + op_cost(0); + + format %{ %} + interface(CONST_INTER); +%} + // Long immediate from 0 to 127. // Used for a shorter form of long mul by 10. operand immL_127() %{ @@ -8621,6 +8631,18 @@ ins_pipe( ialu_reg_reg ); %} +// Xor Register with Immediate -1 +instruct xorI_eReg_im1(eRegI dst, immI_M1 imm) %{ + match(Set dst (XorI dst imm)); + + size(2); + format %{ "NOT $dst" %} + ins_encode %{ + __ notl($dst$$Register); + %} + ins_pipe( ialu_reg ); +%} + // Xor Register with Immediate instruct xorI_eReg_imm(eRegI dst, immI src, eFlagsReg cr) %{ match(Set dst (XorI dst src)); @@ -8938,6 +8960,18 @@ ins_pipe( ialu_reg_reg_long ); %} +// Xor Long Register with Immediate -1 +instruct xorl_eReg_im1(eRegL dst, immL_M1 imm) %{ + match(Set dst (XorL dst imm)); + format %{ "NOT $dst.lo\n\t" + "NOT $dst.hi" %} + ins_encode %{ + __ notl($dst$$Register); + __ notl(HIGH_FROM_LOW($dst$$Register)); + %} + ins_pipe( ialu_reg_long ); +%} + // Xor Long Register with Immediate instruct xorl_eReg_imm(eRegL dst, immL src, eFlagsReg cr) %{ match(Set dst (XorL dst src));
--- a/src/cpu/x86/vm/x86_64.ad Mon Oct 06 13:11:32 2008 -0700 +++ b/src/cpu/x86/vm/x86_64.ad Fri Oct 10 09:47:56 2008 -0700 @@ -9309,6 +9309,17 @@ ins_pipe(ialu_reg_reg); %} +// Xor Register with Immediate -1 +instruct xorI_rReg_im1(rRegI dst, immI_M1 imm) %{ + match(Set dst (XorI dst imm)); + + format %{ "not $dst" %} + ins_encode %{ + __ notl($dst$$Register); + %} + ins_pipe(ialu_reg); +%} + // Xor Register with Immediate instruct xorI_rReg_imm(rRegI dst, immI src, rFlagsReg cr) %{ @@ -9529,6 +9540,17 @@ ins_pipe(ialu_reg_reg); %} +// Xor Register with Immediate -1 +instruct xorL_rReg_im1(rRegL dst, immL_M1 imm) %{ + match(Set dst (XorL dst imm)); + + format %{ "notq $dst" %} + ins_encode %{ + __ notq($dst$$Register); + %} + ins_pipe(ialu_reg); +%} + // Xor Register with Immediate instruct xorL_rReg_imm(rRegL dst, immL32 src, rFlagsReg cr) %{