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| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S | 2 |
2 files changed, 8 insertions, 0 deletions
@@ -1,3 +1,9 @@ +2017-01-30 H.J. Lu <hongjiu.lu@intel.com> + + [BZ #21081] + * sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S + (L(stosb)): Add VZEROUPPER before ret. + 2016-01-28 Carlos O'Donell <carlos@redhat.com> Alexey Makhalov <amakhalov@vmware.com> Florian Weimer <fweimer@redhat.com> diff --git a/sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S b/sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S index ff214f0243..704eed9a3f 100644 --- a/sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S +++ b/sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S @@ -110,6 +110,8 @@ ENTRY (__memset_erms) ENTRY (MEMSET_SYMBOL (__memset, erms)) # endif L(stosb): + /* Issue vzeroupper before rep stosb. */ + VZEROUPPER movq %rdx, %rcx movzbl %sil, %eax movq %rdi, %rdx |