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S390: Optimize stpncpy and wcpncpy.
This patch provides optimized versions of stpncpy and wcpncpy with the z13 vector instructions. ChangeLog: * sysdeps/s390/multiarch/stpncpy-c.c: New File. * sysdeps/s390/multiarch/stpncpy-vx.S: Likewise. * sysdeps/s390/multiarch/stpncpy.c: Likewise. * sysdeps/s390/multiarch/wcpncpy-c.c: Likewise. * sysdeps/s390/multiarch/wcpncpy-vx.S: Likewise. * sysdeps/s390/multiarch/wcpncpy.c: Likewise. * sysdeps/s390/multiarch/Makefile (sysdep_routines): Add stpncpy and wcpncpy functions. * sysdeps/s390/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Add ifunc test for stpncpy, wcpncpy. * wcsmbs/wcpncpy.c: Use WCPNCPY if defined. * string/test-stpncpy.c: Add wcpncpy support. * wcsmbs/test-wcpncpy.c: New File. * wcsmbs/Makefile (strop-tests): Add wcpncpy. * benchtests/bench-stpncpy.c: Add wcpncpy support. * benchtests/bench-wcpncpy.c: New File. * benchtests/Makefile (wcsmbs-bench): Add wcpncpy.
This commit is contained in:
Stefan Liebler
Andreas Krebbel
parent
d183b96ee6
commit
b3a0c176d1
20
ChangeLog
20
ChangeLog
@ -1,3 +1,23 @@
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2015-08-26 Stefan Liebler <stli@linux.vnet.ibm.com>
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* sysdeps/s390/multiarch/stpncpy-c.c: New File.
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* sysdeps/s390/multiarch/stpncpy-vx.S: Likewise.
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* sysdeps/s390/multiarch/stpncpy.c: Likewise.
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* sysdeps/s390/multiarch/wcpncpy-c.c: Likewise.
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* sysdeps/s390/multiarch/wcpncpy-vx.S: Likewise.
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* sysdeps/s390/multiarch/wcpncpy.c: Likewise.
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* sysdeps/s390/multiarch/Makefile (sysdep_routines): Add stpncpy and
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wcpncpy functions.
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* sysdeps/s390/multiarch/ifunc-impl-list.c
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(__libc_ifunc_impl_list): Add ifunc test for stpncpy, wcpncpy.
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* wcsmbs/wcpncpy.c: Use WCPNCPY if defined.
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* string/test-stpncpy.c: Add wcpncpy support.
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* wcsmbs/test-wcpncpy.c: New File.
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* wcsmbs/Makefile (strop-tests): Add wcpncpy.
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* benchtests/bench-stpncpy.c: Add wcpncpy support.
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* benchtests/bench-wcpncpy.c: New File.
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* benchtests/Makefile (wcsmbs-bench): Add wcpncpy.
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2015-08-26 Stefan Liebler <stli@linux.vnet.ibm.com>
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* sysdeps/s390/multiarch/strncpy-vx.S: New File.
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@ -36,7 +36,7 @@ string-bench := bcopy bzero memccpy memchr memcmp memcpy memmem memmove \
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strncasecmp strncat strncmp strncpy strnlen strpbrk strrchr \
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strspn strstr strcpy_chk stpcpy_chk memrchr strsep strtok \
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strcoll
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wcsmbs-bench := wcslen wcsnlen wcscpy wcpcpy wcsncpy
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wcsmbs-bench := wcslen wcsnlen wcscpy wcpcpy wcsncpy wcpncpy
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string-bench-all := $(string-bench) ${wcsmbs-bench}
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# We have to generate locales
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@ -18,18 +18,36 @@
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#define STRNCPY_RESULT(dst, len, n) ((dst) + ((len) > (n) ? (n) : (len)))
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#define TEST_MAIN
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#define TEST_NAME "stpncpy"
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#ifndef WIDE
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# define TEST_NAME "stpncpy"
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#else
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# define TEST_NAME "wcpncpy"
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#endif /* WIDE */
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#include "bench-string.h"
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#ifndef WIDE
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# define CHAR char
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# define SIMPLE_STPNCPY simple_stpncpy
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# define STUPID_STPNCPY stupid_stpncpy
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# define STPNCPY stpncpy
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# define STRNLEN strnlen
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#else
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# include <wchar.h>
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# define CHAR wchar_t
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# define SIMPLE_STPNCPY simple_wcpncpy
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# define STUPID_STPNCPY stupid_wcpncpy
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# define STPNCPY wcpncpy
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# define STRNLEN wcsnlen
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#endif /* WIDE */
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char *simple_stpncpy (char *, const char *, size_t);
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char *stupid_stpncpy (char *, const char *, size_t);
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CHAR *SIMPLE_STPNCPY (CHAR *, const CHAR *, size_t);
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CHAR *STUPID_STPNCPY (CHAR *, const CHAR *, size_t);
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IMPL (stupid_stpncpy, 0)
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IMPL (simple_stpncpy, 0)
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IMPL (stpncpy, 1)
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IMPL (STUPID_STPNCPY, 0)
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IMPL (SIMPLE_STPNCPY, 0)
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IMPL (STPNCPY, 1)
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char *
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simple_stpncpy (char *dst, const char *src, size_t n)
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CHAR *
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SIMPLE_STPNCPY (CHAR *dst, const CHAR *src, size_t n)
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{
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while (n--)
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if ((*dst++ = *src++) == '\0')
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@ -43,10 +61,10 @@ simple_stpncpy (char *dst, const char *src, size_t n)
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return dst;
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}
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char *
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stupid_stpncpy (char *dst, const char *src, size_t n)
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CHAR *
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STUPID_STPNCPY (CHAR *dst, const CHAR *src, size_t n)
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{
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size_t nc = strnlen (src, n);
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size_t nc = STRNLEN (src, n);
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size_t i;
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for (i = 0; i < nc; ++i)
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@ -56,4 +74,5 @@ stupid_stpncpy (char *dst, const char *src, size_t n)
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return dst + nc;
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}
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#undef CHAR
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#include "bench-strncpy.c"
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20
benchtests/bench-wcpncpy.c
Normal file
20
benchtests/bench-wcpncpy.c
Normal file
@ -0,0 +1,20 @@
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/* Measure wcpncpy functions.
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Copyright (C) 2015 Free Software Foundation, Inc.
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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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<http://www.gnu.org/licenses/>. */
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#define WIDE 1
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#include "bench-stpncpy.c"
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@ -19,18 +19,36 @@
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#define STRNCPY_RESULT(dst, len, n) ((dst) + ((len) > (n) ? (n) : (len)))
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#define TEST_MAIN
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#define TEST_NAME "stpncpy"
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#ifndef WIDE
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# define TEST_NAME "stpncpy"
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#else
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# define TEST_NAME "wcpncpy"
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#endif /* WIDE */
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#include "test-string.h"
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#ifndef WIDE
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# define CHAR char
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# define SIMPLE_STPNCPY simple_stpncpy
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# define STUPID_STPNCPY stupid_stpncpy
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# define STPNCPY stpncpy
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# define STRNLEN strnlen
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#else
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# include <wchar.h>
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# define CHAR wchar_t
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# define SIMPLE_STPNCPY simple_wcpncpy
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# define STUPID_STPNCPY stupid_wcpncpy
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# define STPNCPY wcpncpy
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# define STRNLEN wcsnlen
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#endif /* WIDE */
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char *simple_stpncpy (char *, const char *, size_t);
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char *stupid_stpncpy (char *, const char *, size_t);
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CHAR *SIMPLE_STPNCPY (CHAR *, const CHAR *, size_t);
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CHAR *STUPID_STPNCPY (CHAR *, const CHAR *, size_t);
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IMPL (stupid_stpncpy, 0)
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IMPL (simple_stpncpy, 0)
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IMPL (stpncpy, 1)
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IMPL (STUPID_STPNCPY, 0)
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IMPL (SIMPLE_STPNCPY, 0)
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IMPL (STPNCPY, 1)
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char *
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simple_stpncpy (char *dst, const char *src, size_t n)
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CHAR *
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SIMPLE_STPNCPY (CHAR *dst, const CHAR *src, size_t n)
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{
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while (n--)
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if ((*dst++ = *src++) == '\0')
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@ -44,10 +62,10 @@ simple_stpncpy (char *dst, const char *src, size_t n)
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return dst;
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}
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char *
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stupid_stpncpy (char *dst, const char *src, size_t n)
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CHAR *
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STUPID_STPNCPY (CHAR *dst, const CHAR *src, size_t n)
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{
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size_t nc = strnlen (src, n);
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size_t nc = STRNLEN (src, n);
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size_t i;
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for (i = 0; i < nc; ++i)
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@ -57,4 +75,5 @@ stupid_stpncpy (char *dst, const char *src, size_t n)
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return dst + nc;
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}
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#undef CHAR
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#include "test-strncpy.c"
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@ -3,7 +3,8 @@ sysdep_routines += strlen strlen-vx strlen-c \
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strnlen strnlen-vx strnlen-c \
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strcpy strcpy-vx \
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stpcpy stpcpy-vx stpcpy-c \
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strncpy strncpy-vx
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strncpy strncpy-vx \
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stpncpy stpncpy-vx stpncpy-c
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endif
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ifeq ($(subdir),wcsmbs)
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@ -11,5 +12,6 @@ sysdep_routines += wcslen wcslen-vx wcslen-c \
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wcsnlen wcsnlen-vx wcsnlen-c \
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wcscpy wcscpy-vx wcscpy-c \
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wcpcpy wcpcpy-vx wcpcpy-c \
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wcsncpy wcsncpy-vx wcsncpy-c
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wcsncpy wcsncpy-vx wcsncpy-c \
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wcpncpy wcpncpy-vx wcpncpy-c
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endif
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@ -94,6 +94,9 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
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IFUNC_VX_IMPL (strncpy);
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IFUNC_VX_IMPL (wcsncpy);
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IFUNC_VX_IMPL (stpncpy);
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IFUNC_VX_IMPL (wcpncpy);
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#endif /* HAVE_S390_VX_ASM_SUPPORT */
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return i;
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28
sysdeps/s390/multiarch/stpncpy-c.c
Normal file
28
sysdeps/s390/multiarch/stpncpy-c.c
Normal file
@ -0,0 +1,28 @@
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/* Default stpncpy implementation for S/390.
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Copyright (C) 2015 Free Software Foundation, Inc.
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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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<http://www.gnu.org/licenses/>. */
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#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
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# define STPNCPY __stpncpy_c
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# ifdef SHARED
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# undef libc_hidden_def
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# define libc_hidden_def(name) \
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__hidden_ver1 (__stpncpy_c, __GI___stpncpy, __stpncpy_c);
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# endif /* SHARED */
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# include <string/stpncpy.c>
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#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
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200
sysdeps/s390/multiarch/stpncpy-vx.S
Normal file
200
sysdeps/s390/multiarch/stpncpy-vx.S
Normal file
@ -0,0 +1,200 @@
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/* Vector optimized 32/64 bit S/390 version of stpncpy.
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Copyright (C) 2015 Free Software Foundation, Inc.
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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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<http://www.gnu.org/licenses/>. */
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#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
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# include "sysdep.h"
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# include "asm-syntax.h"
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.text
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/* char * stpncpy (char *dest, const char *src, size_t n)
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Copies at most n characters of string src to dest
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returning a pointer to its end or dest+n
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if src is smaller than n.
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Register usage:
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-%r0 = return value
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-%r1 = zero byte index
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-%r2 = curr dst pointer
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-%r3 = curr src pointer
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-%r4 = n
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-%r5 = current_len
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-%r6 = loaded bytes
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-%r7 = border, tmp
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*/
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ENTRY(__stpncpy_vx)
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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 %r4,%r4
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# endif /* !defined __s390x__ */
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clgfi %r4,0
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ber %r14 /* Nothing to do, if n == 0. */
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la %r0,0(%r4,%r2) /* Save destination pointer + n for return. */
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vlvgp %v31,%r6,%r7 /* Save registers. */
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vlbb %v16,0(%r3),6 /* Load s until next 4k-byte boundary. */
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lcbb %r6,0(%r3),6 /* Get bytes to 4k-byte boundary or 16. */
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llgfr %r6,%r6 /* Convert 32bit to 64bit. */
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lghi %r5,0 /* current_len = 0. */
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clgrjle %r4,%r6,.Lremaining_v16 /* If n <= loaded-bytes
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-> process remaining. */
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/* n > loaded-byte-count */
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vfenezb %v17,%v16,%v16 /* Find element not equal with zero search. */
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vlgvb %r1,%v17,7 /* Load zero index or 16 if not found. */
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clrjl %r1,%r6,.Lfound_v16_store /* Found zero within loaded bytes,
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copy and return. */
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/* Align s to 16 byte. */
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risbgn %r7,%r3,60,128+63,0 /* %r3 = bits 60-63 of %r2 'and' 15. */
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lghi %r5,15 /* current_len = 15. */
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slr %r5,%r7 /* Compute highest index to 16byte boundary. */
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/* Zero not found and n > loaded-byte-count. */
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vstl %v16,%r5,0(%r2) /* Copy loaded characters - no zero. */
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ahi %r5,1 /* Start loop at next character. */
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/* Now we are 16byte aligned, so we can load a full vreg
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without page fault. */
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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,%r4,.Lloop64
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vl %v16,0(%r5,%r3) /* Load s. */
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clgijl %r4,17,.Lremaining_v16 /* If n <= 16, process remaining
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bytes. */
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.Llt64:
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lgr %r7,%r4
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slgfi %r7,16 /* border_len = n - 16. */
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clgrjhe %r5,%r7,.Lremaining_v16 /* If current_len >= border
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then process remaining bytes. */
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vfenezbs %v17,%v16,%v16 /* Find element not equal with zero search. */
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je .Lfound_v16 /* Jump away if zero was found. */
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vl %v18,16(%r5,%r3) /* Load next part of s. */
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vst %v16,0(%r5,%r2) /* Save previous part without zero to dst. */
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aghi %r5,16
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clgrjhe %r5,%r7,.Lremaining_v18
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vfenezbs %v17,%v18,%v18
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je .Lfound_v18
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vl %v16,16(%r5,%r3)
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vst %v18,0(%r5,%r2)
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aghi %r5,16
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clgrjhe %r5,%r7,.Lremaining_v16
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vfenezbs %v17,%v16,%v16
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je .Lfound_v16
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vl %v18,16(%r5,%r3)
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vst %v16,0(%r5,%r2)
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aghi %r5,16
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.Lremaining_v18:
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vlr %v16,%v18
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.Lremaining_v16:
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/* v16 contains the remaining bytes [1...16].
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Store remaining bytes and append string-termination. */
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vfenezb %v17,%v16,%v16 /* Find element not equal with zero search. */
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slgrk %r7,%r4,%r5 /* Remaining bytes = maxlen - current_len */
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aghi %r7,-1 /* vstl needs highest index. */
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la %r2,0(%r5,%r2) /* vstl has no index register. */
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vlgvb %r1,%v17,7 /* Load zero index or 16 if not found. */
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/* Zero in remaining bytes? -> jump away (zero-index <= max-index). */
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clrjle %r1,%r7,.Lfound_v16_store
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vstl %v16,%r7,0(%r2) /* Store remaining bytes without null
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termination! */
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.Lend:
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/* Restore saved registers. */
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vlgvg %r6,%v31,0
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vlgvg %r7,%v31,1
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lgr %r2,%r0 /* Load saved dest-ptr. */
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br %r14
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.Lfound_v16_32:
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aghi %r5,32
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j .Lfound_v16
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.Lfound_v18_48:
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aghi %r5,32
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.Lfound_v18_16:
|
||||
aghi %r5,16
|
||||
.Lfound_v18:
|
||||
vlr %v16,%v18
|
||||
.Lfound_v16:
|
||||
/* v16 contains a zero. Store remaining bytes to zero. current_len
|
||||
has not reached border, thus checking for n is not needed! */
|
||||
vlgvb %r1,%v17,7 /* Load byte index of zero. */
|
||||
la %r2,0(%r5,%r2) /* vstl has no support for index-register. */
|
||||
.Lfound_v16_store:
|
||||
vstl %v16,%r1,0(%r2) /* Copy characters including zero. */
|
||||
/* Fill remaining bytes with zero - remaining count always > 0. */
|
||||
algr %r5,%r1 /* Remaining bytes (=%r4) = ... */
|
||||
slgr %r4,%r5 /* = maxlen - (currlen + zero_index + 1) */
|
||||
la %r2,0(%r1,%r2) /* Pointer to zero. start filling beyond. */
|
||||
lgr %r0,%r2 /* Save return-pointer to found zero. */
|
||||
clgije %r4,1,.Lend /* Skip zero-filling, if found zero is last
|
||||
possible character.
|
||||
(1 is substracted from r4 below!). */
|
||||
aghi %r4,-2 /* mvc with exrl needs count - 1.
|
||||
(additional -1, see remaining bytes above) */
|
||||
srlg %r6,%r4,8 /* Split into 256 byte blocks. */
|
||||
ltgr %r6,%r6
|
||||
je .Lzero_lt256
|
||||
.Lzero_loop256:
|
||||
mvc 1(256,%r2),0(%r2) /* Fill 256 zeros at once. */
|
||||
la %r2,256(%r2)
|
||||
brctg %r6,.Lzero_loop256 /* Loop until all blocks are processed. */
|
||||
.Lzero_lt256:
|
||||
exrl %r4,.Lmvc_lt256
|
||||
j .Lend
|
||||
.Lmvc_lt256:
|
||||
mvc 1(1,%r2),0(%r2)
|
||||
|
||||
.Lloop64:
|
||||
vl %v16,0(%r5,%r3)
|
||||
vfenezbs %v17,%v16,%v16 /* Find element not equal with zero search. */
|
||||
je .Lfound_v16 /* Jump away if zero was found. */
|
||||
vl %v18,16(%r5,%r3) /* Load next part of s. */
|
||||
vst %v16,0(%r5,%r2) /* Save 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
|
||||
lgr %r1,%r5 /* If %r5 + 64 < maxlen? -> loop64. */
|
||||
aghi %r1,64
|
||||
clgrjl %r1,%r4,.Lloop64
|
||||
|
||||
vl %v16,0(%r5,%r3) /* Load s. */
|
||||
j .Llt64
|
||||
END(__stpncpy_vx)
|
||||
#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
|
||||
28
sysdeps/s390/multiarch/stpncpy.c
Normal file
28
sysdeps/s390/multiarch/stpncpy.c
Normal file
@ -0,0 +1,28 @@
|
||||
/* Multiple versions of stpncpy.
|
||||
Copyright (C) 2015 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
|
||||
<http://www.gnu.org/licenses/>. */
|
||||
|
||||
#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
|
||||
# include <string.h>
|
||||
# include <ifunc-resolve.h>
|
||||
|
||||
s390_vx_libc_ifunc (__stpncpy)
|
||||
weak_alias (__stpncpy, stpncpy)
|
||||
|
||||
#else
|
||||
# include <string/stpncpy.c>
|
||||
#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */
|
||||
25
sysdeps/s390/multiarch/wcpncpy-c.c
Normal file
25
sysdeps/s390/multiarch/wcpncpy-c.c
Normal file
@ -0,0 +1,25 @@
|
||||
/* Default wcsncpy implementation for S/390.
|
||||
Copyright (C) 2015 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
|
||||
<http://www.gnu.org/licenses/>. */
|
||||
|
||||
#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
|
||||
# define WCPNCPY __wcpncpy_c
|
||||
|
||||
# include <wchar.h>
|
||||
extern __typeof (__wcpncpy) __wcpncpy_c;
|
||||
# include <wcsmbs/wcpncpy.c>
|
||||
#endif
|
||||
222
sysdeps/s390/multiarch/wcpncpy-vx.S
Normal file
222
sysdeps/s390/multiarch/wcpncpy-vx.S
Normal file
@ -0,0 +1,222 @@
|
||||
/* Vector optimized 32/64 bit S/390 version of wcpncpy.
|
||||
Copyright (C) 2015 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
|
||||
<http://www.gnu.org/licenses/>. */
|
||||
|
||||
#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
|
||||
|
||||
# include "sysdep.h"
|
||||
# include "asm-syntax.h"
|
||||
|
||||
.text
|
||||
|
||||
/* wchar_t * wcpncpy (wchar_t *dest, const wchar_t *src, size_t n)
|
||||
Copies at most n characters of string src to dest
|
||||
returning a pointer to its end or dest+n
|
||||
if src is smaller than n.
|
||||
|
||||
Register usage:
|
||||
-%r0 = return value
|
||||
-%r1 = zero byte index
|
||||
-%r2 = curr dst pointer
|
||||
-%r3 = curr src pointer
|
||||
-%r4 = n
|
||||
-%r5 = current_len
|
||||
-%r6 = loaded bytes
|
||||
-%r7 = border, tmp
|
||||
*/
|
||||
ENTRY(__wcpncpy_vx)
|
||||
.machine "z13"
|
||||
.machinemode "zarch_nohighgprs"
|
||||
|
||||
# if !defined __s390x__
|
||||
llgfr %r4,%r4
|
||||
# endif /* !defined __s390x__ */
|
||||
|
||||
clgfi %r4,0
|
||||
ber %r14 /* Nothing to do, if n == 0. */
|
||||
|
||||
vlbb %v16,0(%r3),6 /* Load s until next 4k-byte boundary. */
|
||||
|
||||
tmll %r3,3 /* Test if s is 4-byte aligned? */
|
||||
jne .Lfallback /* And use common-code variant if not. */
|
||||
|
||||
vlvgp %v31,%r6,%r7 /* Save registers. */
|
||||
lghi %r5,0 /* current_len = 0. */
|
||||
|
||||
lcbb %r6,0(%r3),6 /* Get bytes to 4k-byte boundary or 16. */
|
||||
llgfr %r6,%r6 /* Convert 32bit to 64bit. */
|
||||
|
||||
/* Check range of maxlen and convert to byte-count. */
|
||||
# ifdef __s390x__
|
||||
tmhh %r4,49152 /* Test bit 0 or 1 of maxlen. */
|
||||
lghi %r1,-4 /* Max byte-count is 18446744073709551612. */
|
||||
# else
|
||||
tmlh %r4,49152 /* Test bit 0 or 1 of maxlen. */
|
||||
llilf %r1,4294967292 /* Max byte-count is 4294967292. */
|
||||
# endif /* !__s390x__ */
|
||||
sllg %r4,%r4,2 /* Convert character-count to byte-count. */
|
||||
locgrne %r4,%r1 /* Use max byte-count, if bit 0/1 was one. */
|
||||
|
||||
la %r0,0(%r4,%r2) /* Save destination pointer + n for return. */
|
||||
|
||||
clgrjle %r4,%r6,.Lremaining_v16 /* If n <= loaded-bytes
|
||||
-> process remaining. */
|
||||
|
||||
/* n > loaded-byte-count */
|
||||
vfenezf %v17,%v16,%v16 /* Find element not equal with zero search. */
|
||||
vlgvb %r1,%v17,7 /* Load zero index or 16 if not found. */
|
||||
aghi %r1,3 /* Also copy remaining bytes of zero. */
|
||||
clrjl %r1,%r6,.Lfound_v16_store /* Found zero within loaded bytes,
|
||||
copy and return. */
|
||||
|
||||
/* Align s to 16 byte. */
|
||||
risbgn %r7,%r3,60,128+63,0 /* %r3 = bits 60-63 of %r2 'and' 15. */
|
||||
lghi %r5,15 /* current_len = 15. */
|
||||
slr %r5,%r7 /* Compute highest index to 16byte boundary. */
|
||||
|
||||
/* Zero not found and n > loaded-byte-count. */
|
||||
vstl %v16,%r5,0(%r2) /* Copy loaded characters - no zero. */
|
||||
ahi %r5,1 /* Start loop at next character. */
|
||||
|
||||
/* Now we are 16byte aligned, so we can load a full vreg
|
||||
without page fault. */
|
||||
lgr %r1,%r5 /* If %r5 + 64 < maxlen? -> loop64. */
|
||||
aghi %r1,64
|
||||
clgrjl %r1,%r4,.Lloop64
|
||||
|
||||
vl %v16,0(%r5,%r3) /* Load s. */
|
||||
clgijl %r4,17,.Lremaining_v16 /* If n <=16,
|
||||
process remaining bytes. */
|
||||
.Llt64:
|
||||
lgr %r7,%r4
|
||||
slgfi %r7,16 /* border_len = n - 16. */
|
||||
|
||||
clgrjhe %r5,%r7,.Lremaining_v16 /* If current_len >= border
|
||||
then process remaining bytes. */
|
||||
vfenezfs %v17,%v16,%v16 /* Find element not equal with zero search. */
|
||||
je .Lfound_v16 /* 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. */
|
||||
aghi %r5,16
|
||||
|
||||
clgrjhe %r5,%r7,.Lremaining_v18
|
||||
vfenezfs %v17,%v18,%v18
|
||||
je .Lfound_v18
|
||||
vl %v16,16(%r5,%r3)
|
||||
vst %v18,0(%r5,%r2)
|
||||
aghi %r5,16
|
||||
|
||||
clgrjhe %r5,%r7,.Lremaining_v16
|
||||
vfenezfs %v17,%v16,%v16
|
||||
je .Lfound_v16
|
||||
vl %v18,16(%r5,%r3)
|
||||
vst %v16,0(%r5,%r2)
|
||||
aghi %r5,16
|
||||
|
||||
.Lremaining_v18:
|
||||
vlr %v16,%v18
|
||||
.Lremaining_v16:
|
||||
/* v16 contains the remaining bytes [1...16].
|
||||
Store remaining bytes and append string-termination. */
|
||||
vfenezf %v17,%v16,%v16 /* Find element not equal with zero search. */
|
||||
slgrk %r7,%r4,%r5 /* Remaining bytes = maxlen - current_len */
|
||||
aghi %r7,-1 /* vstl needs highest index. */
|
||||
la %r2,0(%r5,%r2) /* vstl has no index register. */
|
||||
vlgvb %r1,%v17,7 /* Load zero index or 16 if not found. */
|
||||
aghi %r1,3 /* Also copy remaining bytes of zero. */
|
||||
/* Zero in remaining bytes? -> jump away (zero-index <= max-index). */
|
||||
clrjle %r1,%r7,.Lfound_v16_store
|
||||
vstl %v16,%r7,0(%r2) /* Store remaining bytes without null
|
||||
termination! */
|
||||
.Lend:
|
||||
/* Restore saved registers. */
|
||||
vlgvg %r6,%v31,0
|
||||
vlgvg %r7,%v31,1
|
||||
lgr %r2,%r0 /* Load saved dest-ptr. */
|
||||
br %r14
|
||||
|
||||
.Lfound_v16_32:
|
||||
aghi %r5,32
|
||||
j .Lfound_v16
|
||||
.Lfound_v18_48:
|
||||
aghi %r5,32
|
||||
.Lfound_v18_16:
|
||||
aghi %r5,16
|
||||
.Lfound_v18:
|
||||
vlr %v16,%v18
|
||||
.Lfound_v16:
|
||||
/* v16 contains a zero. Store remaining bytes to zero. current_len
|
||||
has not reached border, thus checking for n is not needed! */
|
||||
vlgvb %r1,%v17,7 /* Load byte index of zero. */
|
||||
la %r2,0(%r5,%r2) /* vstl has no support for index-register. */
|
||||
aghi %r1,3 /* Also copy remaining bytes of zero. */
|
||||
.Lfound_v16_store:
|
||||
vstl %v16,%r1,0(%r2) /* Copy characters including zero. */
|
||||
/* Fill remaining bytes with zero - remaining byte count always > 0. */
|
||||
algr %r5,%r1 /* Remaining bytes (=%r4) = ... */
|
||||
slgr %r4,%r5 /* = n - (currlen + zero_index + 1) */
|
||||
la %r2,0(%r1,%r2) /* Pointer to zero. start filling beyond. */
|
||||
lay %r0,-3(%r2) /* Save return-pointer to found zero. */
|
||||
clgije %r4,1,.Lend /* Skip zero-filling, if found-zero is last
|
||||
possible character.
|
||||
(1 is substracted from r4 below!). */
|
||||
aghi %r4,-2 /* mvc with exrl needs count - 1.
|
||||
(additional -1, see remaining bytes above) */
|
||||
srlg %r6,%r4,8 /* Split into 256 byte blocks. */
|
||||
ltgr %r6,%r6
|
||||
je .Lzero_lt256
|
||||
.Lzero_loop256:
|
||||
mvc 1(256,%r2),0(%r2) /* Fill 256 zeros at once. */
|
||||
la %r2,256(%r2)
|
||||
brctg %r6,.Lzero_loop256 /* Loop until all blocks are processed. */
|
||||
.Lzero_lt256:
|
||||
exrl %r4,.Lmvc_lt256
|
||||
j .Lend
|
||||
.Lmvc_lt256:
|
||||
mvc 1(1,%r2),0(%r2)
|
||||
|
||||
/* Find zero in 16byte aligned loop. */
|
||||
.Lloop64:
|
||||
vl %v16,0(%r5,%r3)
|
||||
vfenezfs %v17,%v16,%v16 /* Find element not equal with zero search. */
|
||||
je .Lfound_v16 /* 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. */
|
||||
vfenezfs %v17,%v18,%v18
|
||||
je .Lfound_v18_16
|
||||
vl %v16,32(%r5,%r3)
|
||||
vst %v18,16(%r5,%r2)
|
||||
vfenezfs %v17,%v16,%v16
|
||||
je .Lfound_v16_32
|
||||
vl %v18,48(%r5,%r3)
|
||||
vst %v16,32(%r5,%r2)
|
||||
vfenezfs %v17,%v18,%v18
|
||||
je .Lfound_v18_48
|
||||
vst %v18,48(%r5,%r2)
|
||||
|
||||
aghi %r5,64
|
||||
lgr %r1,%r5 /* If %r5 + 64 < maxlen? -> loop64. */
|
||||
aghi %r1,64
|
||||
clgrjl %r1,%r4,.Lloop64
|
||||
|
||||
vl %v16,0(%r5,%r3) /* Load s. */
|
||||
j .Llt64
|
||||
|
||||
.Lfallback:
|
||||
jg __wcpncpy_c
|
||||
END(__wcpncpy_vx)
|
||||
#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
|
||||
28
sysdeps/s390/multiarch/wcpncpy.c
Normal file
28
sysdeps/s390/multiarch/wcpncpy.c
Normal file
@ -0,0 +1,28 @@
|
||||
/* Multiple versions of wcpncpy.
|
||||
Copyright (C) 2015 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
|
||||
<http://www.gnu.org/licenses/>. */
|
||||
|
||||
#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
|
||||
# include <wchar.h>
|
||||
# include <ifunc-resolve.h>
|
||||
|
||||
s390_vx_libc_ifunc (__wcpncpy)
|
||||
weak_alias (__wcpncpy, wcpncpy)
|
||||
|
||||
#else
|
||||
# include <wcsmbs/wcpncpy.c>
|
||||
#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */
|
||||
@ -43,7 +43,7 @@ routines := wcscat wcschr wcscmp wcscpy wcscspn wcsdup wcslen wcsncat \
|
||||
mbrtoc16 c16rtomb
|
||||
|
||||
strop-tests := wcscmp wcsncmp wmemcmp wcslen wcschr wcsrchr wcscpy wcsnlen \
|
||||
wcpcpy wcsncpy
|
||||
wcpcpy wcsncpy wcpncpy
|
||||
tests := tst-wcstof wcsmbs-tst1 tst-wcsnlen tst-btowc tst-mbrtowc \
|
||||
tst-wcrtomb tst-wcpncpy tst-mbsrtowcs tst-wchar-h tst-mbrtowc2 \
|
||||
tst-c16c32-1 wcsatcliff $(addprefix test-,$(strop-tests))
|
||||
|
||||
20
wcsmbs/test-wcpncpy.c
Normal file
20
wcsmbs/test-wcpncpy.c
Normal file
@ -0,0 +1,20 @@
|
||||
/* Test wcpncpy functions.
|
||||
Copyright (C) 2015 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
|
||||
<http://www.gnu.org/licenses/>. */
|
||||
|
||||
#define WIDE 1
|
||||
#include "../string/test-stpncpy.c"
|
||||
@ -18,6 +18,9 @@
|
||||
|
||||
#include <wchar.h>
|
||||
|
||||
#ifdef WCPNCPY
|
||||
# define __wcpncpy WCPNCPY
|
||||
#endif
|
||||
|
||||
/* Copy no more than N wide-characters of SRC to DEST, returning the
|
||||
address of the last character written into DEST. */
|
||||
@ -82,4 +85,6 @@ __wcpncpy (dest, src, n)
|
||||
return dest - 1;
|
||||
}
|
||||
|
||||
#ifndef WCPNCPY
|
||||
weak_alias (__wcpncpy, wcpncpy)
|
||||
#endif
|
||||
|
||||
Loading…
Reference in New Issue
Block a user