[7/7] Enable __memcpy_chk_sse2_unaligned
Commit Message
Check Fast_Unaligned_Load for __memcpy_chk_sse2_unaligned. The new
selection order is:
1. __memcpy_chk_avx_unaligned if AVX_Fast_Unaligned_Load bit is set.
2. __memcpy_chk_sse2_unaligned if Fast_Unaligned_Load bit is set.
3. __memcpy_chk_sse2 if SSSE3 isn't available.
4. __memcpy_chk_ssse3_back if Fast_Copy_Backward bit it set.
5. __memcpy_chk_ssse3
[BZ #19776]
* sysdeps/x86_64/multiarch/mempcpy_chk.S (__mempcpy_chk): Check
Fast_Unaligned_Load to enable __mempcpy_chk_sse2_unaligned.
---
sysdeps/x86_64/multiarch/memcpy_chk.S | 23 +++++++++++++----------
1 file changed, 13 insertions(+), 10 deletions(-)
@@ -32,22 +32,25 @@ ENTRY(__memcpy_chk)
LOAD_RTLD_GLOBAL_RO_RDX
#ifdef HAVE_AVX512_ASM_SUPPORT
HAS_ARCH_FEATURE (AVX512F_Usable)
- jz 1f
+ jz 1f
HAS_ARCH_FEATURE (Prefer_No_VZEROUPPER)
- jz 1f
- leaq __memcpy_chk_avx512_no_vzeroupper(%rip), %rax
+ jz 1f
+ lea __memcpy_chk_avx512_no_vzeroupper(%rip), %RAX_LP
ret
#endif
-1: leaq __memcpy_chk_sse2(%rip), %rax
+1: lea __memcpy_chk_avx_unaligned(%rip), %RAX_LP
+ HAS_ARCH_FEATURE (AVX_Fast_Unaligned_Load)
+ jnz 2f
+ lea __memcpy_chk_sse2_unaligned(%rip), %RAX_LP
+ HAS_ARCH_FEATURE (Fast_Unaligned_Load)
+ jnz 2f
+ lea __memcpy_chk_sse2(%rip), %RAX_LP
HAS_CPU_FEATURE (SSSE3)
jz 2f
- leaq __memcpy_chk_ssse3(%rip), %rax
+ lea __memcpy_chk_ssse3_back(%rip), %RAX_LP
HAS_ARCH_FEATURE (Fast_Copy_Backward)
- jz 2f
- leaq __memcpy_chk_ssse3_back(%rip), %rax
- HAS_ARCH_FEATURE (AVX_Fast_Unaligned_Load)
- jz 2f
- leaq __memcpy_chk_avx_unaligned(%rip), %rax
+ jnz 2f
+ lea __memcpy_chk_ssse3(%rip), %RAX_LP
2: ret
END(__memcpy_chk)
# else