src/x64/assembler-x64.h - Issue 330018: Generate more compact XOR on 64-bit architecture when using xor to zero out r...

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Unified Diff: src/x64/assembler-x64.h

Issue 330018: Generate more compact XOR on 64-bit architecture when using xor to zero out r... (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/

Patch Set: Created 11 years, 2 months ago

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Index: src/x64/assembler-x64.h

===================================================================

--- src/x64/assembler-x64.h (revision 3123)

+++ src/x64/assembler-x64.h (working copy)

@@ -920,7 +920,11 @@

void testq(Register dst, Immediate mask);

void xor_(Register dst, Register src) {

- arithmetic_op(0x33, dst, src);

+ if (dst.code() == src.code()) {

+ arithmetic_op_32(0x33, dst, src);

+ } else {

+ arithmetic_op(0x33, dst, src);

+ }

}

void xorl(Register dst, Register src) {

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