src/ia32/macro-assembler-ia32.cc - Issue 7703007: Make instruction for write barrier smaller.

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Unified Diff: src/ia32/macro-assembler-ia32.cc

Issue 7703007: Make instruction for write barrier smaller. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge

Patch Set: Created 9 years, 4 months ago

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Index: src/ia32/macro-assembler-ia32.cc

diff --git a/src/ia32/macro-assembler-ia32.cc b/src/ia32/macro-assembler-ia32.cc

index 04e6cde4ed149da8da2151c0b759936e34ceab9b..9df5cad915a0a615e0510d514c70d19b16893730 100644

--- a/src/ia32/macro-assembler-ia32.cc

+++ b/src/ia32/macro-assembler-ia32.cc

@@ -69,8 +69,8 @@ void MacroAssembler::RecordWriteHelper(Register object,

// Compute number of region covering addr. See Page::GetRegionNumberForAddress

// method for more details.

- and_(addr, Page::kPageAlignmentMask);

shr(addr, Page::kRegionSizeLog2);

+ and_(addr, Page::kPageAlignmentMask >> Page::kRegionSizeLog2);

// Set dirty mark for region.

// Bit tests with a memory operand should be avoided on Intel processors,

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