x86_64: Use %xmmN with vpxor to clear a vector register

Since "vpxor %xmmN, %xmmN, %xmmN" clears the whole vector register, use
%xmmN, instead of %ymmN, with vpxor to clear a vector register.

diff --git a/sysdeps/x86_64/multiarch/strcmp-avx2.S b/sysdeps/x86_64/multiarch/strcmp-avx2.S
index 48d03a9..5f88a68 100644 (file)
--- a/sysdeps/x86_64/multiarch/strcmp-avx2.S
+++ b/sysdeps/x86_64/multiarch/strcmp-avx2.S
@@ -91,8 +91,8 @@ ENTRY (STRCMP)
 # endif
        movl    %edi, %eax
        xorl    %edx, %edx
-       /* Make %ymm7 all zeros in this function.  */
-       vpxor   %ymm7, %ymm7, %ymm7
+       /* Make %xmm7 (%ymm7) all zeros in this function.  */
+       vpxor   %xmm7, %xmm7, %xmm7
        orl     %esi, %eax
        andl    $(PAGE_SIZE - 1), %eax
        cmpl    $(PAGE_SIZE - (VEC_SIZE * 4)), %eax

diff --git a/sysdeps/x86_64/multiarch/strrchr-avx2.S b/sysdeps/x86_64/multiarch/strrchr-avx2.S
index 23077b4..146bdd5 100644 (file)
--- a/sysdeps/x86_64/multiarch/strrchr-avx2.S
+++ b/sysdeps/x86_64/multiarch/strrchr-avx2.S
@@ -44,7 +44,7 @@ ENTRY (STRRCHR)
        movl    %edi, %ecx
        /* Broadcast CHAR to YMM4.  */
        VPBROADCAST %xmm4, %ymm4
-       vpxor   %ymm0, %ymm0, %ymm0
+       vpxor   %xmm0, %xmm0, %xmm0
 
        /* Check if we may cross page boundary with one vector load.  */
        andl    $(2 * VEC_SIZE - 1), %ecx