Improve 64bit memcpy performance for Haswell CPU with AVX instruction

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

diff --git a/sysdeps/x86_64/multiarch/mempcpy_chk.S b/sysdeps/x86_64/multiarch/mempcpy_chk.S
index c28473a6694cdf9b811b06a9da90f8d08111155f..88e0b74e83738d89b1508bd299d9926fe3c35a89 100644 (file)
--- a/sysdeps/x86_64/multiarch/mempcpy_chk.S
+++ b/sysdeps/x86_64/multiarch/mempcpy_chk.S
@@ -39,6 +39,9 @@ ENTRY(__mempcpy_chk)
        testl   $bit_Fast_Copy_Backward, __cpu_features+FEATURE_OFFSET+index_Fast_Copy_Backward(%rip)
        jz      2f
        leaq    __mempcpy_chk_ssse3_back(%rip), %rax
+       testl   $bit_AVX_Usable, __cpu_features+FEATURE_OFFSET+index_AVX_Usable(%rip)
+       jz      2f
+       leaq    __mempcpy_chk_avx_unaligned(%rip), %rax
 2:     ret
 END(__mempcpy_chk)
 # else