Improve 64bit memcpy performance for Haswell CPU with AVX instruction

[thirdparty/glibc.git] / sysdeps / x86_64 / multiarch / memcpy_chk.S

diff --git a/sysdeps/x86_64/multiarch/memcpy_chk.S b/sysdeps/x86_64/multiarch/memcpy_chk.S
index 3c0270fd2358661fd0b1131f7e4740832fe9fabe..076b19a9eac5b343d7be1a0e19e0e15ff6c48b7a 100644 (file)
--- a/sysdeps/x86_64/multiarch/memcpy_chk.S
+++ b/sysdeps/x86_64/multiarch/memcpy_chk.S
@@ -39,6 +39,9 @@ ENTRY(__memcpy_chk)
        testl   $bit_Fast_Copy_Backward, __cpu_features+FEATURE_OFFSET+index_Fast_Copy_Backward(%rip)
        jz      2f
        leaq    __memcpy_chk_ssse3_back(%rip), %rax
+       testl   $bit_AVX_Usable, __cpu_features+FEATURE_OFFSET+index_AVX_Usable(%rip)
+       jz  2f
+       leaq    __memcpy_chk_avx_unaligned(%rip), %rax
 2:     ret
 END(__memcpy_chk)
 # else