2015-08-26 08:26:20 +00:00
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/* Vector optimized 32/64 bit S/390 version of wcsnlen.
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2020-01-01 00:14:33 +00:00
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Copyright (C) 2015-2020 Free Software Foundation, Inc.
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2015-08-26 08:26:20 +00:00
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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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
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<https://www.gnu.org/licenses/>. */
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2015-08-26 08:26:20 +00:00
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2018-12-18 12:57:18 +00:00
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#include <ifunc-wcsnlen.h>
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#if HAVE_WCSNLEN_Z13
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2015-08-26 08:26:20 +00:00
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# include "sysdep.h"
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# include "asm-syntax.h"
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.text
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/* size_t wcsnlen (const wchar_t *s, size_t maxlen)
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Returns the number of characters in s or at most maxlen.
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Register usage:
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-r1=tmp
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-r2=address of string
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-r3=maxlen (number of characters to be read)
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-r4=tmp
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-r5=current_len and return_value
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-v16=part of s
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*/
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2018-12-18 12:57:18 +00:00
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ENTRY(WCSNLEN_Z13)
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2015-08-26 08:26:20 +00:00
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.machine "z13"
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.machinemode "zarch_nohighgprs"
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# if !defined __s390x__
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llgfr %r3,%r3
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# endif /* !defined __s390x__ */
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clgfi %r3,0 /* if maxlen == 0, return 0. */
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locgre %r2,%r3
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ber %r14
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vlbb %v16,0(%r2),6 /* Load s until next 4k-byte boundary. */
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lcbb %r1,0(%r2),6 /* Get bytes to 4k-byte boundary or 16. */
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llgfr %r1,%r1 /* Convert 32bit to 64bit. */
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tmll %r2,3 /* Test if s is 4-byte aligned? */
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jne .Lfallback /* And use common-code variant if not. */
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/* Check range of maxlen and convert to byte-count. */
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# ifdef __s390x__
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tmhh %r3,49152 /* Test bit 0 or 1 of maxlen. */
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lghi %r4,-4 /* Max byte-count is 18446744073709551612. */
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# else
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tmlh %r3,49152 /* Test bit 0 or 1 of maxlen. */
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llilf %r4,4294967292 /* Max byte-count is 4294967292. */
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# endif /* !__s390x__ */
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sllg %r3,%r3,2 /* Convert character-count to byte-count. */
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locgrne %r3,%r4 /* Use max byte-count, if bit 0/1 was one. */
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vfenezf %v16,%v16,%v16 /* Find element not equal with zero search. */
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clgr %r1,%r3
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locgrh %r1,%r3 /* loaded_byte_count
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= min (loaded_byte_count, maxlen) */
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vlgvb %r5,%v16,7 /* Load zero index or 16 if not found. */
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clrjl %r5,%r1,.Lend /* Found zero within loaded bytes -> return. */
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clgr %r1,%r3 /* If loaded_byte_count == maxlen -> end. */
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locgre %r5,%r3
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je .Lend
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/* Align s to 16 byte. */
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risbgn %r4,%r2,60,128+63,0 /* %r3 = bits 60-63 of %r2 'and' 15. */
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lghi %r5,16 /* current_len = 16. */
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slr %r5,%r4 /* Compute bytes to 16bytes boundary. */
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lgr %r1,%r5 /* If %r5 + 64 < maxlen? -> loop64. */
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aghi %r1,64
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clgrjl %r1,%r3,.Lloop64
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/* Find zero in max 64byte with aligned s. */
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.Llt64:
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vl %v16,0(%r5,%r2) /* Load s. */
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vfenezfs %v16,%v16,%v16 /* Find element not equal with zero search. */
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je .Lfound /* Jump away if zero was found. */
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aghi %r5,16
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clgrjhe %r5,%r3,.Lfound /* If current_len >= maxlen -> end. */
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vl %v16,0(%r5,%r2)
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vfenezfs %v16,%v16,%v16
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je .Lfound
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aghi %r5,16
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clgrjhe %r5,%r3,.Lfound
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vl %v16,0(%r5,%r2)
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vfenezfs %v16,%v16,%v16
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je .Lfound
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aghi %r5,16
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clgrjhe %r5,%r3,.Lfound
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vl %v16,0(%r5,%r2)
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vfenezfs %v16,%v16,%v16
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j .Lfound
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.Lfound48:
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aghi %r5,16
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.Lfound32:
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aghi %r5,16
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.Lfound16:
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aghi %r5,16
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.Lfound:
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vlgvb %r4,%v16,7 /* Load byte index of zero or 16 if no zero. */
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algr %r5,%r4
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clgr %r5,%r3
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locgrh %r5,%r3 /* Return min (current_len, maxlen). */
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.Lend:
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srlg %r2,%r5,2 /* Convert byte-count to character-count. */
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br %r14
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/* Find zero in 16byte aligned loop. */
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.Lloop64:
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vl %v16,0(%r5,%r2) /* Load s. */
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vfenezfs %v16,%v16,%v16 /* Find element not equal with zero search. */
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je .Lfound /* Jump away if zero was found. */
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vl %v16,16(%r5,%r2)
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vfenezfs %v16,%v16,%v16
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je .Lfound16
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vl %v16,32(%r5,%r2)
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vfenezfs %v16,%v16,%v16
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je .Lfound32
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vl %v16,48(%r5,%r2)
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vfenezfs %v16,%v16,%v16
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je .Lfound48
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aghi %r5,64
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lgr %r1,%r5 /* If %r5 + 64 < maxlen? -> loop64. */
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aghi %r1,64
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clgrjl %r1,%r3,.Lloop64
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j .Llt64
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.Lfallback:
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2018-12-18 12:57:18 +00:00
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jg WCSNLEN_C
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END(WCSNLEN_Z13)
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# if ! HAVE_WCSNLEN_IFUNC
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strong_alias (WCSNLEN_Z13, __wcsnlen)
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weak_alias (__wcsnlen, wcsnlen)
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# endif
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#endif
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