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* libc: Purge unneeded cdefs.hWarner Losh2023-11-011-1/+0
| | | | | | | | | These sys/cdefs.h are not needed. Purge them. They are mostly left-over from the $FreeBSD$ removal. A few in libc are still required for macros that cdefs.h defines. Keep those. Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D42385
* Remove $FreeBSD$: one-line .c patternWarner Losh2023-08-161-2/+0
| | | | Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/
* spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSDWarner Losh2023-05-121-1/+1
| | | | | | | | | The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch up to that fact and revert to their recommended match of BSD-2-Clause. Discussed with: pfg MFC After: 3 days Sponsored by: Netflix
* Restore the augmented strlen commentaryMateusz Guzik2021-02-081-11/+4
| | | | ... lost in revert
* Revert "Reimplement strlen"Mateusz Guzik2021-02-031-28/+54
| | | | | | | | | This reverts commit 710e45c4b8539d028877769f1a4ec088c48fb5f1. It breaks for some corner cases on big endian ppc64. Given the stage of the release process it is best to revert for now. Reported by: jhibbits
* Reimplement strlenMateusz Guzik2021-01-291-54/+28
| | | | | | | | | | | | | | | | | | | | | | | The previous code neglected to use primitives which can find the end of the string without having to branch on every character. While here augment the somewhat misleading commentary -- strlen as implemented here leaves performance on the table, especially so for userspace. Every arch should get a dedicated variant instead. In the meantime this commit lessens the problem. Tested with glibc test suite. Naive test just calling strlen in a loop on Haswell (ops/s): $(perl -e "print 'A' x 3"): before: 211198039 after: 338626619 $(perl -e "print 'A' x 100"): before: 83151997 after: 98285919
* Remove "All rights reserved" from my files.Xin LI2018-05-101-1/+0
| | | | | | | | | See r333391 for the rationale. MFC after: 1 week Notes: svn path=/head/; revision=333449
* libc: further adoption of SPDX licensing ID tags.Pedro F. Giffuni2017-11-251-0/+2
| | | | | | | | | | | | | | | Mainly focus on files that use BSD 2-Clause license, however the tool I was using mis-identified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Notes: svn path=/head/; revision=326193
* Correct bugs fixed but not merged from my own tree.Xin LI2010-03-131-2/+3
| | | | | | | | Pointy hat to: delphij MFC after: 1 month Notes: svn path=/head/; revision=205108
* Follow up commit to reindent the code.Xin LI2010-03-121-13/+13
| | | | | | | MFC after: 1 month Notes: svn path=/head/; revision=205100
* Two optimizations to MI strlen(3) inspired by David S. Miller'sXin LI2010-03-121-12/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | blog posting [1]. - Use word-sized test for unaligned pointer before working the hard way. Memory page boundary is always integral multiple of a word alignment boundary. Therefore, if we can access memory referenced by pointer p, then (p & ~word mask) must be also accessible. - Better utilization of multi-issue processor's ability of concurrency. The previous implementation utilized a formular that must be executed sequentially. However, the ~, & and - operations can actually be caculated at the same time when the operand were different and unrelated. The original Hacker's Delight formular also offered consistent performance regardless whether the input would contain characters with their highest-bit set, as it catches real nul characters only. These two optimizations has shown further improvements over the previous implementation on microbenchmarks on i386 and amd64 CPU including Pentium 4, Core Duo 2 and i7. [1] http://vger.kernel.org/~davem/cgi-bin/blog.cgi/2010/03/08#strlen_1 MFC after: 1 month Notes: svn path=/head/; revision=205099
* - Fix grammar. [1]Xin LI2009-01-261-3/+3
| | | | | | | | | | | - Use the correct term 'long mode'. [2] - style(9) for return value. [3] Submitted by: Ben Kaduk <minimarmot gmail com> [1], obrien [2], scf [3] Notes: svn path=/head/; revision=187707
* Rewrite of MI strlen(3) in a way that can better utilize modern hardware byXin LI2009-01-251-15/+78
| | | | | | | | | | | | reducing branches and doing word-sized operation. The idea is taken from J.T. Conklin's x86_64 optimized version of strlen(3) for NetBSD, and reimplemented in C by me. Discussed on: -arch@ Notes: svn path=/head/; revision=187700
* Per Regents of the University of Calfornia letter, remove advertisingWarner Losh2007-01-091-4/+0
| | | | | | | | | clause. # If I've done so improperly on a file, please let me know. Notes: svn path=/head/; revision=165903
* Remove 'register' keyword.David E. O'Brien2002-03-211-1/+1
| | | | Notes: svn path=/head/; revision=92889
* rcsid[]->__FBSDIDDavid E. O'Brien2001-11-071-5/+2
| | | | Notes: svn path=/head/; revision=86170
* Make the rcsid and FreeBSD IDs more sane in the wcs* and wmem* files.David E. O'Brien2001-05-241-0/+4
| | | | | | | Do the same for the non-wcs*/wmem* files while I'm here. Notes: svn path=/head/; revision=77117
* BSD 4.4 Lite Lib SourcesRodney W. Grimes1994-05-271-0/+50
Notes: svn path=/cvs2svn/branches/unlabeled-1.1.1/; revision=1573
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