src/ia32/codegen-ia32.cc - Issue 661368: Add cld before doing rep movs.

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Unified Diff: src/ia32/codegen-ia32.cc

Issue 661368: Add cld before doing rep movs. (Closed)

Patch Set: Created 10 years, 10 months ago

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Index: src/ia32/codegen-ia32.cc

diff --git a/src/ia32/codegen-ia32.cc b/src/ia32/codegen-ia32.cc

index 62b3c9a0ba16f338ade90af0b3ccd5bee975b5b9..b611cd07d06d68b966a2bc78e57c4c40f2ca2b78 100644

--- a/src/ia32/codegen-ia32.cc

+++ b/src/ia32/codegen-ia32.cc

@@ -10922,6 +10922,7 @@ void StringStubBase::GenerateCopyCharactersREP(MacroAssembler* masm,

// Copy from edi to esi using rep movs instruction.

__ mov(scratch, count);

__ sar(count, 2); // Number of doublewords to copy.

+ __ cld();

__ rep_movs();

// Find number of bytes left.

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