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From e7e6385876577e04101a9b9ed8d10c34f634c905 Mon Sep 17 00:00:00 2001
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From: "H.J. Lu" <hjl.tools@gmail.com>
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Date: Thu, 11 Jun 2020 12:41:18 -0700
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Subject: [PATCH] x86_64: Use %xmmN with vpxor to clear a vector register
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Since "vpxor %xmmN, %xmmN, %xmmN" clears the whole vector register, use
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%xmmN, instead of %ymmN, with vpxor to clear a vector register.
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(cherry picked from commit a35a59036ebae3efcdf5e8167610e0656fca9770)
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---
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sysdeps/x86_64/multiarch/strcmp-avx2.S | 4 ++--
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sysdeps/x86_64/multiarch/strrchr-avx2.S | 2 +-
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2 files changed, 3 insertions(+), 3 deletions(-)
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diff --git a/sysdeps/x86_64/multiarch/strcmp-avx2.S b/sysdeps/x86_64/multiarch/strcmp-avx2.S
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index 433ae047..70d8499b 100644
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--- a/sysdeps/x86_64/multiarch/strcmp-avx2.S
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+++ b/sysdeps/x86_64/multiarch/strcmp-avx2.S
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@@ -105,8 +105,8 @@ ENTRY (STRCMP)
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# endif
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movl %edi, %eax
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xorl %edx, %edx
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- /* Make %ymm7 all zeros in this function. */
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- vpxor %ymm7, %ymm7, %ymm7
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+ /* Make %xmm7 (%ymm7) all zeros in this function. */
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+ vpxor %xmm7, %xmm7, %xmm7
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orl %esi, %eax
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andl $(PAGE_SIZE - 1), %eax
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cmpl $(PAGE_SIZE - (VEC_SIZE * 4)), %eax
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diff --git a/sysdeps/x86_64/multiarch/strrchr-avx2.S b/sysdeps/x86_64/multiarch/strrchr-avx2.S
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index 9f22a15e..c949410b 100644
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--- a/sysdeps/x86_64/multiarch/strrchr-avx2.S
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+++ b/sysdeps/x86_64/multiarch/strrchr-avx2.S
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@@ -48,7 +48,7 @@ ENTRY (STRRCHR)
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movl %edi, %ecx
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/* Broadcast CHAR to YMM4. */
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VPBROADCAST %xmm4, %ymm4
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- vpxor %ymm0, %ymm0, %ymm0
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+ vpxor %xmm0, %xmm0, %xmm0
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/* Check if we may cross page boundary with one vector load. */
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andl $(2 * VEC_SIZE - 1), %ecx
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--
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GitLab
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