glibc/sysdeps/s390/strcpy-vx.S

110 lines
3.1 KiB
ArmAsm
Raw Normal View History

/* Vector optimized 32/64 bit S/390 version of strcpy.
Copyright (C) 2015-2022 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 05:40:42 +00:00
<https://www.gnu.org/licenses/>. */
#include <ifunc-strcpy.h>
#include "sysdep.h"
#include "asm-syntax.h"
.text
#if HAVE_STRCPY_Z13
/* char * strcpy (const char *dest, const char *src)
Copy string src to dest.
Register usage:
-r1=tmp
-r2=dest and return_value
-r3=src
-r4=tmp
-r5=current_len
-v16=part of src
-v17=index of zero
-v18=part of src
*/
ENTRY(STRCPY_Z13)
.machine "z13"
.machinemode "zarch_nohighgprs"
vlbb %v16,0(%r3),6 /* Load s until next 4k-byte boundary. */
lcbb %r1,0(%r3),6 /* Get bytes to 4k-byte boundary or 16. */
vfenezb %v17,%v16,%v16 /* Find element not equal with zero search. */
vlgvb %r5,%v17,7 /* Load zero index or 16 if not found. */
clrjl %r5,%r1,.Lfound_align /* If found zero within loaded bytes,
copy bytes before and return. */
/* Align s to 16 byte. */
risbgn %r4,%r3,60,128+63,0 /* %r3 = bits 60-63 of %r2 'and' 15. */
lghi %r5,15 /* current_len = 15. */
slr %r5,%r4 /* Compute highest index to 16byte boundary. */
vstl %v16,%r5,0(%r2) /* Copy loaded characters - no zero. */
ahi %r5,1 /* Start loop at next character. */
/* Find zero in 16byte aligned loop. */
.Lloop:
vl %v16,0(%r5,%r3) /* Load s. */
vfenezbs %v17,%v16,%v16 /* Find element not equal with zero search. */
je .Lfound_v16_0 /* Jump away if zero was found. */
vl %v18,16(%r5,%r3)/* Load next part of s. */
vst %v16,0(%r5,%r2) /* Store previous part without zero to dst. */
vfenezbs %v17,%v18,%v18
je .Lfound_v18_16
vl %v16,32(%r5,%r3)
vst %v18,16(%r5,%r2)
vfenezbs %v17,%v16,%v16
je .Lfound_v16_32
vl %v18,48(%r5,%r3)
vst %v16,32(%r5,%r2)
vfenezbs %v17,%v18,%v18
je .Lfound_v18_48
vst %v18,48(%r5,%r2)
aghi %r5,64
j .Lloop /* No zero found -> loop. */
.Lfound_v16_32:
aghi %r5,32
.Lfound_v16_0:
la %r3,0(%r5,%r2)
vlgvb %r4,%v17,7 /* Load byte index of zero. */
vstl %v16,%r4,0(%r3) /* Store characters including zero. */
br %r14
.Lfound_v18_48:
aghi %r5,32
.Lfound_v18_16:
la %r3,16(%r5,%r2)
vlgvb %r4,%v17,7 /* Load byte index of zero. */
vstl %v18,%r4,0(%r3) /* Store characters including zero. */
br %r14
.Lfound_align:
vstl %v16,%r5,0(%r2) /* Copy characters including zero. */
br %r14
END(STRCPY_Z13)
# if ! HAVE_STRCPY_IFUNC
strong_alias (STRCPY_Z13, strcpy)
# endif
# if ! HAVE_STRCPY_Z900_G5 && defined SHARED && IS_IN (libc)
strong_alias (STRCPY_Z13, __GI_strcpy)
# endif
#endif