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| author | H.J. Lu <hjl.tools@gmail.com> | 2017-01-30 10:59:15 -0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2017-01-30 10:59:31 -0800 |
| commit | 02b78ff749f0c88771713368dbb2a09b1979814f (patch) | |
| tree | f65e7fc16ef78b3e4254dcf0dcdb1e98864c5576 /libio/ioputs.c | |
| parent | f8bf15febcaf137bbec5a61101e88cd5a9d56ca8 (diff) | |
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Add VZEROUPPER to memset-vec-unaligned-erms.S [BZ #21081]
Since memset-vec-unaligned-erms.S has VDUP_TO_VEC0_AND_SET_RETURN at
function entry, memset optimized for AVX2 and AVX512 will always use
ymm/zmm register. VZEROUPPER should be placed before ret in
L(stosb):
movq %rdx, %rcx
movzbl %sil, %eax
movq %rdi, %rdx
rep stosb
movq %rdx, %rax
ret
since it can be reached from
L(stosb_more_2x_vec):
cmpq $REP_STOSB_THRESHOLD, %rdx
ja L(stosb)
[BZ #21081]
* sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S
(L(stosb)): Add VZEROUPPER before ret.
Diffstat (limited to 'libio/ioputs.c')
0 files changed, 0 insertions, 0 deletions