glibc/sysdeps/s390/strchrnul-vx.S

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/* Vector optimized 32/64 bit S/390 version of strchrnul.
Copyright (C) 2015-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
Prefer https to http for gnu.org and fsf.org URLs Also, change sources.redhat.com to sourceware.org. This patch was automatically generated by running the following shell script, which uses GNU sed, and which avoids modifying files imported from upstream: sed -ri ' s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g ' \ $(find $(git ls-files) -prune -type f \ ! -name '*.po' \ ! -name 'ChangeLog*' \ ! -path COPYING ! -path COPYING.LIB \ ! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \ ! -path manual/texinfo.tex ! -path scripts/config.guess \ ! -path scripts/config.sub ! -path scripts/install-sh \ ! -path scripts/mkinstalldirs ! -path scripts/move-if-change \ ! -path INSTALL ! -path locale/programs/charmap-kw.h \ ! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \ ! '(' -name configure \ -execdir test -f configure.ac -o -f configure.in ';' ')' \ ! '(' -name preconfigure \ -execdir test -f preconfigure.ac ';' ')' \ -print) and then by running 'make dist-prepare' to regenerate files built from the altered files, and then executing the following to cleanup: chmod a+x sysdeps/unix/sysv/linux/riscv/configure # Omit irrelevant whitespace and comment-only changes, # perhaps from a slightly-different Autoconf version. git checkout -f \ sysdeps/csky/configure \ sysdeps/hppa/configure \ sysdeps/riscv/configure \ sysdeps/unix/sysv/linux/csky/configure # Omit changes that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines git checkout -f \ sysdeps/powerpc/powerpc64/ppc-mcount.S \ sysdeps/unix/sysv/linux/s390/s390-64/syscall.S # Omit change that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-09-07 13:40:42 +08:00
<https://www.gnu.org/licenses/>. */
#include <ifunc-strchrnul.h>
#if HAVE_STRCHRNUL_Z13
# include "sysdep.h"
# include "asm-syntax.h"
.text
/* char *strchrnul (const char *s, int c)
Returns pointer to first c or to \0 if c not found.
Register usage:
-r1=tmp
-r2=s and return pointer
-r3=c
-r4=tmp
-r5=current_len
-v16=part of s
-v18=vector with c replicated in every byte
*/
ENTRY(STRCHRNUL_Z13)
.machine "z13"
.machinemode "zarch_nohighgprs"
vlbb %v16,0(%r2),6 /* Load s until next 4k-byte boundary. */
lcbb %r1,0(%r2),6 /* Get bytes to 4k-byte boundary or 16. */
lghi %r5,0 /* current_len = 0. */
vlvgb %v18,%r3,0 /* Generate vector which elements are all c.
If c > 255, c will be truncated. */
vrepb %v18,%v18,0
vfeezbs %v16,%v16,%v18 /* Find element equal with zero search. */
vlgvb %r4,%v16,7 /* Load byte index of character or zero. */
clrjl %r4,%r1,.Lfound /* Return if c/zero is in loaded bytes. */
/* Align s to 16 byte. */
risbgn %r4,%r2,60,128+63,0 /* %r3 = bits 60-63 of %r2 'and' 15. */
lghi %r5,16 /* current_len = 16. */
slr %r5,%r4 /* Compute bytes to 16bytes boundary. */
/* Find c/zero in 16byte aligned loop */
.Lloop:
vl %v16,0(%r5,%r2) /* Load s */
vfeezbs %v16,%v16,%v18 /* Find element equal with zero search. */
jno .Lfound /* Found c/zero (cc=0|1|2). */
vl %v16,16(%r5,%r2)
vfeezbs %v16,%v16,%v18
jno .Lfound16
vl %v16,32(%r5,%r2)
vfeezbs %v16,%v16,%v18
jno .Lfound32
vl %v16,48(%r5,%r2)
vfeezbs %v16,%v16,%v18
jno .Lfound48
aghi %r5,64
j .Lloop /* No character and no zero -> loop. */
/* Found character or zero */
.Lfound48:
aghi %r5,16
.Lfound32:
aghi %r5,16
.Lfound16:
aghi %r5,16
.Lfound:
vlgvb %r1,%v16,7 /* Load byte index of character. */
algr %r5,%r1
la %r2,0(%r5,%r2) /* Return pointer to character. */
.Lend:
br %r14
END(STRCHRNUL_Z13)
# if ! HAVE_STRCHRNUL_IFUNC
libc_hidden_def (__strchrnul)
strong_alias (STRCHRNUL_Z13, __strchrnul)
weak_alias (__strchrnul, strchrnul)
# endif
#endif /* HAVE_STRCHRNUL_Z13 */