|
Revision tags: release/13.4.0-p5, release/13.5.0-p1, release/14.2.0-p3, release/13.5.0, release/14.2.0-p2, release/14.1.0-p8, release/13.4.0-p4, release/14.1.0-p7, release/14.2.0-p1, release/13.4.0-p3, release/14.2.0, release/13.4.0, release/14.1.0, release/13.3.0, release/14.0.0 |
|
| #
37728967 |
| 16-Sep-2023 |
Robert Clausecker <[email protected]> |
lib/libc/amd64/string/strcmp.S: add baseline implementation
This is the most complicated one so far. The basic idea is to process
the bulk of the string in aligned blocks of 16 bytes such that one
lib/libc/amd64/string/strcmp.S: add baseline implementation
This is the most complicated one so far. The basic idea is to process
the bulk of the string in aligned blocks of 16 bytes such that one
string runs ahead and the other runs behind. The string that runs ahead
is checked for NUL bytes, the one that runs behind is compared with the
corresponding chunk of the string that runs ahead. This trades an extra
load per iteration for the very complicated block-reassembly needed in
the other implementations (bionic, glibc). On the flip side, we need
two code paths depending on the relative alignment of the two buffers.
The initial part of the string is compared directly if it is known not
to cross a page boundary. Otherwise, a complex slow path to avoid
crossing into unmapped memory commences.
Performance-wise we beat bionic for misaligned strings (i.e. the strings
do not share an alignment offset) and reach comparable performance for
aligned strings. glibc is a bit better as it has a special kernel for
AVX-512, where this stuff is a bit easier to do.
Sponsored by: The FreeBSD Foundation
Tested by: developers@, exp-run
Approved by: mjg
MFC after: 1 month
MFC to: stable/14
PR: 275785
Differential Revision: https://reviews.freebsd.org/D41971
(cherry picked from commit bca25680b91b3bea7faef615765806a04634eb23)
show more ...
|
| #
1d386b48 |
| 16-Aug-2023 |
Warner Losh <[email protected]> |
Remove $FreeBSD$: one-line .c pattern
Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/
|
|
Revision tags: release/13.2.0, release/12.4.0, release/13.1.0, release/12.3.0, release/13.0.0, release/12.2.0, release/11.4.0, release/12.1.0, release/11.3.0, release/12.0.0, release/11.2.0, release/10.4.0, release/11.1.0, release/11.0.1, release/11.0.0 |
|
| #
32223c1b |
| 30-Apr-2016 |
Pedro F. Giffuni <[email protected]> |
libc: spelling fixes.
Mostly on comments.
|
|
Revision tags: release/10.3.0, release/10.2.0, release/10.1.0, release/9.3.0, release/10.0.0, release/9.2.0, release/8.4.0, release/9.1.0, release/8.3.0_cvs, release/8.3.0, release/9.0.0, release/7.4.0_cvs, release/8.2.0_cvs, release/7.4.0, release/8.2.0 |
|
| #
93ab7586 |
| 07-Jan-2011 |
Konstantin Belousov <[email protected]> |
Add section .note.GNU-stack for assembly files used by 386 and amd64.
|
|
Revision tags: release/8.1.0_cvs, release/8.1.0, release/7.3.0_cvs, release/7.3.0, release/8.0.0_cvs, release/8.0.0, release/7.2.0_cvs, release/7.2.0, release/7.1.0_cvs, release/7.1.0, release/6.4.0_cvs, release/6.4.0 |
|
| #
5d053f46 |
| 02-Nov-2008 |
Peter Wemm <[email protected]> |
We've been lax about matching END() macros in asm code for some time. This
is used to set the ELF size attribute for functions. It isn't normally
critical but some things can make use of it (gdb fo
We've been lax about matching END() macros in asm code for some time. This
is used to set the ELF size attribute for functions. It isn't normally
critical but some things can make use of it (gdb for stack traces).
Valgrind needs it so I'm adding it in. The problem is present on all
branches and on both i386 and amd64.
show more ...
|
|
Revision tags: release/7.0.0_cvs, release/7.0.0, release/6.3.0_cvs, release/6.3.0, release/6.2.0_cvs, release/6.2.0, release/5.5.0_cvs, release/5.5.0, release/6.1.0_cvs, release/6.1.0, release/6.0.0_cvs, release/6.0.0, release/5.4.0_cvs, release/5.4.0 |
|
| #
e5dd4df8 |
| 09-Apr-2005 |
Alan Cox <[email protected]> |
Add a machine-specific, optimized implementation of strcmp.
PR: 73111
Submitted by: Ville-Pertti Keinonen <[email protected]> (taken from NetBSD)
MFC after: 3 weeks
|