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| author | Mateusz Guzik <mjg@FreeBSD.org> | 2018-09-29 07:40:52 +0000 |
|---|---|---|
| committer | Mateusz Guzik <mjg@FreeBSD.org> | 2018-09-29 07:40:52 +0000 |
| commit | 275c893dab216b6851f7bb1d89bcb1d31924b451 (patch) | |
| tree | 61d058a907bbfe9460cd4c1d0791af15661529b2 /lib/libc/amd64/string | |
| parent | 9d967dd27d212ee960d806801d641ed9eb564a34 (diff) | |
| download | src-275c893dab216b6851f7bb1d89bcb1d31924b451.tar.gz src-275c893dab216b6851f7bb1d89bcb1d31924b451.zip | |
amd64: remove unnecessary cld from libc memcpy/bcopy
The ABI specifies the direction forward on function call, making
the cld instruction redundant.
Approved by: re (kib)
Notes
Notes:
svn path=/head/; revision=339011
Diffstat (limited to 'lib/libc/amd64/string')
| -rw-r--r-- | lib/libc/amd64/string/bcopy.S | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/lib/libc/amd64/string/bcopy.S b/lib/libc/amd64/string/bcopy.S index eca7a23d7721..9446e75b8053 100644 --- a/lib/libc/amd64/string/bcopy.S +++ b/lib/libc/amd64/string/bcopy.S @@ -60,7 +60,6 @@ ENTRY(bcopy) subq %rsi,%r8 cmpq %rcx,%r8 /* overlapping? */ jb 1f - cld /* nope, copy forwards. */ shrq $3,%rcx /* copy by words */ rep movsq |