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Differential D41980

lib/libc/amd64/string: implement strpbrk() through strcspn()
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Authored by fuz on Sep 25 2023, 9:49 PM.

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mjg
kib

Commits

rGf42eca44bdfb: share/man/man7/simd.7: document amd64 SIMD use for strpbrk()
rG309b30ce8419: lib/libc/amd64/string: implement strpbrk() through strcspn()
rG8b60e1fdbefa: share/man/man7/simd.7: document amd64 SIMD use for strpbrk()
rGf4fc317c364f: lib/libc/amd64/string: implement strpbrk() through strcspn()

Summary

This lets us use our optimised strcspn() routine for strpbrk() calls.

In principle, this change could be applied to all architectures
through modification of lib/libc/string/strpbrk.c as strcspn
has a better generic implementation than strpbrk. I have avoided
this as to reduce the impact of these changes. If desired I can
update this DR to do so.

Sponsored by: The FreeBSD Foundation

Test Plan

passes test suite

Diff Detail

Repository

rG FreeBSD src repository

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Unit

Tests Not Applicable

Event Timeline

fuz created this revision.Sep 25 2023, 9:49 PM

Herald added a subscriber: imp. · View Herald TranscriptSep 25 2023, 9:49 PM

fuz requested review of this revision.Sep 25 2023, 9:49 PM

Harbormaster completed remote builds in B53721: Diff 127807.Sep 25 2023, 9:49 PM

This revision was not accepted when it landed; it landed in state Needs Review.Dec 25 2023, 2:26 PM

Closed by commit rGf4fc317c364f: lib/libc/amd64/string: implement strpbrk() through strcspn() (authored by fuz). · Explain Why

This revision was automatically updated to reflect the committed changes.

fuz added a commit: rGf4fc317c364f: lib/libc/amd64/string: implement strpbrk() through strcspn().

fuz added a commit: rG8b60e1fdbefa: share/man/man7/simd.7: document amd64 SIMD use for strpbrk().

fuz added a commit: rG309b30ce8419: lib/libc/amd64/string: implement strpbrk() through strcspn().Jan 24 2024, 7:45 PM

fuz added a commit: rGf42eca44bdfb: share/man/man7/simd.7: document amd64 SIMD use for strpbrk().

Revision Contents
Changeset List

Path

Size

lib/

libc/

amd64/

string/

1 line

18 lines

43 lines

Diff 131807

lib/libc/amd64/string/Makefile.inc

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lib/libc/amd64/string/strcspn.S

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lib/libc/amd64/string/strpbrk.c

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