infernap12/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2026-05-11 14:11:36 +00:00
Code Issues Packages Projects Releases Wiki Activity

6752257: Use NOT instead of XOR -1 on x86

Browse Source 
Add match rule for xor -1

Reviewed-by: never, kvn
This commit is contained in:
Chuck Rasbold 2008-10-10 09:47:56 -07:00
parent 7633aaa177
commit e585263735
2 changed files with 56 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
hotspot/src/cpu/x86/vm/x86_32.ad
View File

@ -4810,6 +4810,16 @@ operand immL0() %{
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 @@ instruct xorI_eReg(eRegI dst, eRegI src, eFlagsReg cr) %{
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$$Register);
%}
ins_pipe( ialu_reg );
%}
// Xor Register with Immediate
instruct xorI_eReg_imm(eRegI dst, immI src, eFlagsReg cr) %{
match(Set dst (XorI dst src));
@ -8938,6 +8960,18 @@ instruct xorl_eReg(eRegL dst, eRegL src, eFlagsReg cr) %{
ins_pipe( ialu_reg_reg_long );
%}
// Xor Long Register with Immediate -1
instruct xorl_eReg_im1(eRegL dst, immL_M1 imm) %{
match(Set dst (XorL dst imm));
format %{ "NOT $dst.lo\n\t"
"NOT $dst.hi" %}
ins_encode %{
__ notl($dst$$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));

22
hotspot/src/cpu/x86/vm/x86_64.ad
View File

@ -9309,6 +9309,17 @@ instruct xorI_rReg(rRegI dst, rRegI src, rFlagsReg cr)
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$$Register);
%}
ins_pipe(ialu_reg);
%}
// Xor Register with Immediate
instruct xorI_rReg_imm(rRegI dst, immI src, rFlagsReg cr)
%{
@ -9529,6 +9540,17 @@ instruct xorL_rReg(rRegL dst, rRegL src, rFlagsReg cr)
ins_pipe(ialu_reg_reg);
%}
// Xor Register with Immediate -1
instruct xorL_rReg_im1(rRegL dst, immL_M1 imm) %{
match(Set dst (XorL dst imm));
format %{ "notq $dst" %}
ins_encode %{
__ notq($dst$$Register);
%}
ins_pipe(ialu_reg);
%}
// Xor Register with Immediate
instruct xorL_rReg_imm(rRegL dst, immL32 src, rFlagsReg cr)
%{