Commit-ID: dd1ef4ec4721ddc0a1f2b73a4f67930cb320665c Gitweb: http://git.kernel.org/tip/dd1ef4ec4721ddc0a1f2b73a4f67930cb320665c Author: "Jan Beulich" <jbeulich@xxxxxxxxxx> AuthorDate: Thu, 12 Mar 2009 10:47:13 +0000 Commit: Ingo Molnar <mingo@xxxxxxx> CommitDate: Thu, 12 Mar 2009 12:04:47 +0100 x86-64: remove unnecessary spill/reload of rbx from memcpy Impact: micro-optimization This should slightly improve its performance. Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx> LKML-Reference: <49B8F641.76E4.0078.0@xxxxxxxxxx> Signed-off-by: Ingo Molnar <mingo@xxxxxxx> --- arch/x86/lib/memcpy_64.S | 7 ------- 1 files changed, 0 insertions(+), 7 deletions(-) diff --git a/arch/x86/lib/memcpy_64.S b/arch/x86/lib/memcpy_64.S index c22981f..10c0676 100644 --- a/arch/x86/lib/memcpy_64.S +++ b/arch/x86/lib/memcpy_64.S @@ -33,9 +33,6 @@ ENDPROC(memcpy_c) ENTRY(__memcpy) ENTRY(memcpy) CFI_STARTPROC - pushq %rbx - CFI_ADJUST_CFA_OFFSET 8 - CFI_REL_OFFSET rbx, 0 movq %rdi,%rax movl %edx,%ecx @@ -102,11 +99,7 @@ ENTRY(memcpy) jnz .Lloop_1 .Lende: - popq %rbx - CFI_ADJUST_CFA_OFFSET -8 - CFI_RESTORE rbx ret -.Lfinal: CFI_ENDPROC ENDPROC(memcpy) ENDPROC(__memcpy) -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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