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glibc
0011-S390-Optimize-strnlen-and-wcsnlen.patch
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File 0011-S390-Optimize-strnlen-and-wcsnlen.patch of Package glibc
2015-08-26 Stefan Liebler <stli@linux.vnet.ibm.com> * sysdeps/s390/multiarch/strnlen-c.c: New File. * sysdeps/s390/multiarch/strnlen-vx.S: Likewise. * sysdeps/s390/multiarch/strnlen.c: Likewise. * sysdeps/s390/multiarch/wcsnlen-c.c: Likewise. * sysdeps/s390/multiarch/wcsnlen-vx.S: Likewise. * sysdeps/s390/multiarch/wcsnlen.c: Likewise. * sysdeps/s390/multiarch/Makefile (sysdep_routines): Add strnlen and wcsnlen functions. * sysdeps/s390/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Add ifunc test for strnlen, wcsnlen. * wcsmbs/wcsnlen.c: Use WCSNLEN if defined. * string/test-strnlen.c: Add wcsnlen support. * wcsmbs/test-wcsnlen.c: New File. * wcsmbs/Makefile (strop-tests): Add wcsnlen. * benchtests/bench-strnlen.c: Add wcsnlen support. * benchtests/bench-wcsnlen.c: New File. * benchtests/Makefile (wcsmbs-bench): Add wcsnlen. Index: glibc-2.22/benchtests/Makefile =================================================================== --- glibc-2.22.orig/benchtests/Makefile +++ glibc-2.22/benchtests/Makefile @@ -36,7 +36,7 @@ string-bench := bcopy bzero memccpy memc strncasecmp strncat strncmp strncpy strnlen strpbrk strrchr \ strspn strstr strcpy_chk stpcpy_chk memrchr strsep strtok \ strcoll -wcsmbs-bench := wcslen +wcsmbs-bench := wcslen wcsnlen string-bench-all := $(string-bench) ${wcsmbs-bench} # We have to generate locales Index: glibc-2.22/benchtests/bench-strnlen.c =================================================================== --- glibc-2.22.orig/benchtests/bench-strnlen.c +++ glibc-2.22/benchtests/bench-strnlen.c @@ -17,17 +17,36 @@ <http://www.gnu.org/licenses/>. */ #define TEST_MAIN -#define TEST_NAME "strnlen" +#ifndef WIDE +# define TEST_NAME "strnlen" +#else +# define TEST_NAME "wcsnlen" +#endif /* WIDE */ #include "bench-string.h" -typedef size_t (*proto_t) (const char *, size_t); -size_t simple_strnlen (const char *, size_t); +#ifndef WIDE +# define STRNLEN strnlen +# define CHAR char +# define BIG_CHAR CHAR_MAX +# define MIDDLE_CHAR 127 +# define SIMPLE_STRNLEN simple_strnlen +#else +# include <wchar.h> +# define STRNLEN wcsnlen +# define CHAR wchar_t +# define BIG_CHAR WCHAR_MAX +# define MIDDLE_CHAR 1121 +# define SIMPLE_STRNLEN simple_wcsnlen +#endif /* WIDE */ -IMPL (simple_strnlen, 0) -IMPL (strnlen, 1) +typedef size_t (*proto_t) (const CHAR *, size_t); +size_t SIMPLE_STRNLEN (const CHAR *, size_t); + +IMPL (SIMPLE_STRNLEN, 0) +IMPL (STRNLEN, 1) size_t -simple_strnlen (const char *s, size_t maxlen) +SIMPLE_STRNLEN (const CHAR *s, size_t maxlen) { size_t i; @@ -36,7 +55,7 @@ simple_strnlen (const char *s, size_t ma } static void -do_one_test (impl_t *impl, const char *s, size_t maxlen, size_t exp_len) +do_one_test (impl_t *impl, const CHAR *s, size_t maxlen, size_t exp_len) { size_t len = CALL (impl, s, maxlen), i, iters = INNER_LOOP_ITERS; timing_t start, stop, cur; @@ -66,18 +85,20 @@ do_test (size_t align, size_t len, size_ { size_t i; - align &= 7; - if (align + len >= page_size) + align &= 63; + if ((align + len) * sizeof (CHAR) >= page_size) return; + CHAR *buf = (CHAR *) (buf1); + for (i = 0; i < len; ++i) - buf1[align + i] = 1 + 7 * i % max_char; - buf1[align + len] = 0; + buf[align + i] = 1 + 7 * i % max_char; + buf[align + len] = 0; printf ("Length %4zd, alignment %2zd:", len, align); FOR_EACH_IMPL (impl, 0) - do_one_test (impl, (char *) (buf1 + align), maxlen, MIN (len, maxlen)); + do_one_test (impl, (CHAR *) (buf + align), maxlen, MIN (len, maxlen)); putchar ('\n'); } @@ -96,34 +117,34 @@ test_main (void) for (i = 1; i < 8; ++i) { - do_test (0, i, i - 1, 127); - do_test (0, i, i, 127); - do_test (0, i, i + 1, 127); + do_test (0, i, i - 1, MIDDLE_CHAR); + do_test (0, i, i, MIDDLE_CHAR); + do_test (0, i, i + 1, MIDDLE_CHAR); } for (i = 1; i < 8; ++i) { - do_test (i, i, i - 1, 127); - do_test (i, i, i, 127); - do_test (i, i, i + 1, 127); + do_test (i, i, i - 1, MIDDLE_CHAR); + do_test (i, i, i, MIDDLE_CHAR); + do_test (i, i, i + 1, MIDDLE_CHAR); } for (i = 2; i <= 10; ++i) { - do_test (0, 1 << i, 5000, 127); - do_test (1, 1 << i, 5000, 127); + do_test (0, 1 << i, 5000, MIDDLE_CHAR); + do_test (1, 1 << i, 5000, MIDDLE_CHAR); } for (i = 1; i < 8; ++i) - do_test (0, i, 5000, 255); + do_test (0, i, 5000, BIG_CHAR); for (i = 1; i < 8; ++i) - do_test (i, i, 5000, 255); + do_test (i, i, 5000, BIG_CHAR); for (i = 2; i <= 10; ++i) { - do_test (0, 1 << i, 5000, 255); - do_test (1, 1 << i, 5000, 255); + do_test (0, 1 << i, 5000, BIG_CHAR); + do_test (1, 1 << i, 5000, BIG_CHAR); } return ret; Index: glibc-2.22/benchtests/bench-wcsnlen.c =================================================================== --- /dev/null +++ glibc-2.22/benchtests/bench-wcsnlen.c @@ -0,0 +1,20 @@ +/* Measure wcsnlen 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 "bench-strnlen.c" Index: glibc-2.22/string/test-strnlen.c =================================================================== --- glibc-2.22.orig/string/test-strnlen.c +++ glibc-2.22/string/test-strnlen.c @@ -1,4 +1,4 @@ -/* Test and measure strlen functions. +/* Test strlen functions. Copyright (C) 1999-2015 Free Software Foundation, Inc. This file is part of the GNU C Library. Written by Jakub Jelinek <jakub@redhat.com>, 1999. @@ -18,17 +18,36 @@ <http://www.gnu.org/licenses/>. */ #define TEST_MAIN -#define TEST_NAME "strnlen" +#ifndef WIDE +# define TEST_NAME "strnlen" +#else +# define TEST_NAME "wcsnlen" +#endif /* !WIDE */ #include "test-string.h" -typedef size_t (*proto_t) (const char *, size_t); -size_t simple_strnlen (const char *, size_t); +#ifndef WIDE +# define STRNLEN strnlen +# define CHAR char +# define BIG_CHAR CHAR_MAX +# define MIDDLE_CHAR 127 +# define SIMPLE_STRNLEN simple_strnlen +#else +# include <wchar.h> +# define STRNLEN wcsnlen +# define CHAR wchar_t +# define BIG_CHAR WCHAR_MAX +# define MIDDLE_CHAR 1121 +# define SIMPLE_STRNLEN simple_wcsnlen +#endif /* !WIDE */ -IMPL (simple_strnlen, 0) -IMPL (strnlen, 1) +typedef size_t (*proto_t) (const CHAR *, size_t); +size_t SIMPLE_STRNLEN (const CHAR *, size_t); + +IMPL (SIMPLE_STRNLEN, 0) +IMPL (STRNLEN, 1) size_t -simple_strnlen (const char *s, size_t maxlen) +SIMPLE_STRNLEN (const CHAR *s, size_t maxlen) { size_t i; @@ -37,7 +56,7 @@ simple_strnlen (const char *s, size_t ma } static void -do_one_test (impl_t *impl, const char *s, size_t maxlen, size_t exp_len) +do_one_test (impl_t *impl, const CHAR *s, size_t maxlen, size_t exp_len) { size_t len = CALL (impl, s, maxlen); if (len != exp_len) @@ -54,23 +73,25 @@ do_test (size_t align, size_t len, size_ { size_t i; - align &= 7; - if (align + len >= page_size) + align &= 63; + if ((align + len) * sizeof (CHAR) >= page_size) return; + CHAR *buf = (CHAR *) (buf1); + for (i = 0; i < len; ++i) - buf1[align + i] = 1 + 7 * i % max_char; - buf1[align + len] = 0; + buf[align + i] = 1 + 11111 * i % max_char; + buf[align + len] = 0; FOR_EACH_IMPL (impl, 0) - do_one_test (impl, (char *) (buf1 + align), maxlen, MIN (len, maxlen)); + do_one_test (impl, (CHAR *) (buf + align), maxlen, MIN (len, maxlen)); } static void do_random_tests (void) { size_t i, j, n, align, len; - unsigned char *p = buf1 + page_size - 512; + CHAR *p = (CHAR *) (buf1 + page_size - 512 * sizeof (CHAR)); for (n = 0; n < ITERATIONS; n++) { @@ -97,25 +118,25 @@ do_random_tests (void) FOR_EACH_IMPL (impl, 1) { if (len > 0 - && CALL (impl, (char *) (p + align), len - 1) != len - 1) + && CALL (impl, (CHAR *) (p + align), len - 1) != len - 1) { error (0, 0, "Iteration %zd (limited) - wrong result in function %s (%zd) %zd != %zd, p %p", n, impl->name, align, - CALL (impl, (char *) (p + align), len - 1), len - 1, p); + CALL (impl, (CHAR *) (p + align), len - 1), len - 1, p); ret = 1; } - if (CALL (impl, (char *) (p + align), len) != len) + if (CALL (impl, (CHAR *) (p + align), len) != len) { error (0, 0, "Iteration %zd (exact) - wrong result in function %s (%zd) %zd != %zd, p %p", n, impl->name, align, - CALL (impl, (char *) (p + align), len), len, p); + CALL (impl, (CHAR *) (p + align), len), len, p); ret = 1; } - if (CALL (impl, (char *) (p + align), len + 1) != len) + if (CALL (impl, (CHAR *) (p + align), len + 1) != len) { error (0, 0, "Iteration %zd (long) - wrong result in function %s (%zd) %zd != %zd, p %p", n, impl->name, align, - CALL (impl, (char *) (p + align), len + 1), len, p); + CALL (impl, (CHAR *) (p + align), len + 1), len, p); ret = 1; } } @@ -136,34 +157,34 @@ test_main (void) for (i = 1; i < 8; ++i) { - do_test (0, i, i - 1, 127); - do_test (0, i, i, 127); - do_test (0, i, i + 1, 127); + do_test (0, i, i - 1, MIDDLE_CHAR); + do_test (0, i, i, MIDDLE_CHAR); + do_test (0, i, i + 1, MIDDLE_CHAR); } for (i = 1; i < 8; ++i) { - do_test (i, i, i - 1, 127); - do_test (i, i, i, 127); - do_test (i, i, i + 1, 127); + do_test (i, i, i - 1, MIDDLE_CHAR); + do_test (i, i, i, MIDDLE_CHAR); + do_test (i, i, i + 1, MIDDLE_CHAR); } for (i = 2; i <= 10; ++i) { - do_test (0, 1 << i, 5000, 127); - do_test (1, 1 << i, 5000, 127); + do_test (0, 1 << i, 5000, MIDDLE_CHAR); + do_test (1, 1 << i, 5000, MIDDLE_CHAR); } for (i = 1; i < 8; ++i) - do_test (0, i, 5000, 255); + do_test (0, i, 5000, BIG_CHAR); for (i = 1; i < 8; ++i) - do_test (i, i, 5000, 255); + do_test (i, i, 5000, BIG_CHAR); for (i = 2; i <= 10; ++i) { - do_test (0, 1 << i, 5000, 255); - do_test (1, 1 << i, 5000, 255); + do_test (0, 1 << i, 5000, BIG_CHAR); + do_test (1, 1 << i, 5000, BIG_CHAR); } do_random_tests (); Index: glibc-2.22/sysdeps/s390/multiarch/Makefile =================================================================== --- glibc-2.22.orig/sysdeps/s390/multiarch/Makefile +++ glibc-2.22/sysdeps/s390/multiarch/Makefile @@ -1,7 +1,9 @@ ifeq ($(subdir),string) -sysdep_routines += strlen strlen-vx strlen-c +sysdep_routines += strlen strlen-vx strlen-c \ + strnlen strnlen-vx strnlen-c endif ifeq ($(subdir),wcsmbs) -sysdep_routines += wcslen wcslen-vx wcslen-c +sysdep_routines += wcslen wcslen-vx wcslen-c \ + wcsnlen wcsnlen-vx wcsnlen-c endif Index: glibc-2.22/sysdeps/s390/multiarch/ifunc-impl-list.c =================================================================== --- glibc-2.22.orig/sysdeps/s390/multiarch/ifunc-impl-list.c +++ glibc-2.22/sysdeps/s390/multiarch/ifunc-impl-list.c @@ -82,6 +82,9 @@ __libc_ifunc_impl_list (const char *name IFUNC_VX_IMPL (strlen); IFUNC_VX_IMPL (wcslen); + IFUNC_VX_IMPL (strnlen); + IFUNC_VX_IMPL (wcsnlen); + #endif /* HAVE_S390_VX_ASM_SUPPORT */ return i; Index: glibc-2.22/sysdeps/s390/multiarch/strnlen-c.c =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/multiarch/strnlen-c.c @@ -0,0 +1,30 @@ +/* Default strnlen 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 STRNLEN __strnlen_c +# ifdef SHARED +# undef libc_hidden_def +# define libc_hidden_def(name) \ + __hidden_ver1 (__strnlen_c, __GI_strnlen, __strnlen_c); \ + strong_alias (__strnlen_c, __strnlen_c_1); \ + __hidden_ver1 (__strnlen_c_1, __GI___strnlen, __strnlen_c_1); +# endif /* SHARED */ + +# include <string/strnlen.c> +#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */ Index: glibc-2.22/sysdeps/s390/multiarch/strnlen-vx.S =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/multiarch/strnlen-vx.S @@ -0,0 +1,134 @@ +/* Vector optimized 32/64 bit S/390 version of strnlen. + 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 + +/* size_t strnlen (const char *s, size_t maxlen) + Returns the number of characters in s or at most maxlen. + + Register usage: + -r1=tmp + -r2=address of string + -r3=maxlen (number of characters to be read) + -r4=tmp + -r5=current_len and return_value + -v16=part of s +*/ +ENTRY(__strnlen_vx) + .machine "z13" + .machinemode "zarch_nohighgprs" + +# if !defined __s390x__ + llgfr %r3,%r3 +# endif /* !defined __s390x__ */ + + clgfi %r3,0 /* if maxlen == 0, return 0. */ + locgre %r2,%r3 + ber %r14 + + 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. */ + llgfr %r1,%r1 /* Convert 32bit to 64bit. */ + + vfenezb %v16,%v16,%v16 /* Find element not equal with zero search. */ + clgr %r1,%r3 + locgrh %r1,%r3 /* loaded_byte_count + = min (loaded_byte_count, maxlen) */ + + vlgvb %r5,%v16,7 /* Load zero index or 16 if not found. */ + clr %r5,%r1 /* If found zero within loaded bytes? */ + locgrl %r2,%r5 /* Then copy return value. */ + blr %r14 /* And return. */ + + clgr %r1,%r3 /* If loaded_byte_count == maxlen? */ + locgre %r2,%r3 /* Then copy return value. */ + ber %r14 /* And return. */ + + /* 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. */ + + lgr %r1,%r5 /* If %r5 + 64 < maxlen? -> loop64. */ + aghi %r1,64 + clgrjl %r1,%r3,.Lloop64 + + /* Find zero in max 64byte with aligned s. */ +.Llt64: + vl %v16,0(%r5,%r2) /* Load s. */ + vfenezbs %v16,%v16,%v16 /* Find element not equal with zero search. */ + je .Lfound /* Jump away if zero was found. */ + aghi %r5,16 + clgrjhe %r5,%r3,.Lfound /* current_len >= maxlen -> end. */ + vl %v16,0(%r5,%r2) + vfenezbs %v16,%v16,%v16 + je .Lfound + aghi %r5,16 + clgrjhe %r5,%r3,.Lfound + vl %v16,0(%r5,%r2) + vfenezbs %v16,%v16,%v16 + je .Lfound + aghi %r5,16 + clgrjhe %r5,%r3,.Lfound + vl %v16,0(%r5,%r2) + vfenezbs %v16,%v16,%v16 + j .Lfound + +.Lfound48: + aghi %r5,16 +.Lfound32: + aghi %r5,16 +.Lfound16: + aghi %r5,16 +.Lfound: + vlgvb %r4,%v16,7 /* Load byte index of zero or 16 if no zero. */ + algr %r5,%r4 + + clgr %r5,%r3 + locgrh %r5,%r3 /* Return min (current_len, maxlen). */ + lgr %r2,%r5 + br %r14 + + /* Find zero in 16 byte aligned loop. */ +.Lloop64: + vl %v16,0(%r5,%r2) /* Load s. */ + vfenezbs %v16,%v16,%v16 /* Find element not equal with zero search. */ + je .Lfound /* Jump away if zero was found. */ + vl %v16,16(%r5,%r2) + vfenezbs %v16,%v16,%v16 + je .Lfound16 + vl %v16,32(%r5,%r2) + vfenezbs %v16,%v16,%v16 + je .Lfound32 + vl %v16,48(%r5,%r2) + vfenezbs %v16,%v16,%v16 + je .Lfound48 + + aghi %r5,64 + lgr %r1,%r5 /* If %r5 + 64 < maxlen? -> loop64. */ + aghi %r1,64 + clgrjl %r1,%r3,.Lloop64 + + j .Llt64 +END(__strnlen_vx) +#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */ Index: glibc-2.22/sysdeps/s390/multiarch/strnlen.c =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/multiarch/strnlen.c @@ -0,0 +1,29 @@ +/* Multiple versions of strnlen. + 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 (__strnlen) +weak_alias (__strnlen, strnlen) +libc_hidden_def (strnlen) + +#else +# include <string/strnlen.c> +#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */ Index: glibc-2.22/sysdeps/s390/multiarch/wcsnlen-c.c =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/multiarch/wcsnlen-c.c @@ -0,0 +1,25 @@ +/* Default wcsnlen 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 WCSNLEN __wcsnlen_c + +# include <wchar.h> +extern __typeof (__wcsnlen) __wcsnlen_c; +# include <wcsmbs/wcsnlen.c> +#endif Index: glibc-2.22/sysdeps/s390/multiarch/wcsnlen-vx.S =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/multiarch/wcsnlen-vx.S @@ -0,0 +1,151 @@ +/* Vector optimized 32/64 bit S/390 version of wcsnlen. + 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 + +/* size_t wcsnlen (const wchar_t *s, size_t maxlen) + Returns the number of characters in s or at most maxlen. + + Register usage: + -r1=tmp + -r2=address of string + -r3=maxlen (number of characters to be read) + -r4=tmp + -r5=current_len and return_value + -v16=part of s +*/ +ENTRY(__wcsnlen_vx) + + .machine "z13" + .machinemode "zarch_nohighgprs" + +# if !defined __s390x__ + llgfr %r3,%r3 +# endif /* !defined __s390x__ */ + + clgfi %r3,0 /* if maxlen == 0, return 0. */ + locgre %r2,%r3 + ber %r14 + + 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. */ + llgfr %r1,%r1 /* Convert 32bit to 64bit. */ + + tmll %r2,3 /* Test if s is 4-byte aligned? */ + jne .Lfallback /* And use common-code variant if not. */ + + /* Check range of maxlen and convert to byte-count. */ +# ifdef __s390x__ + tmhh %r3,49152 /* Test bit 0 or 1 of maxlen. */ + lghi %r4,-4 /* Max byte-count is 18446744073709551612. */ +# else + tmlh %r3,49152 /* Test bit 0 or 1 of maxlen. */ + llilf %r4,4294967292 /* Max byte-count is 4294967292. */ +# endif /* !__s390x__ */ + sllg %r3,%r3,2 /* Convert character-count to byte-count. */ + locgrne %r3,%r4 /* Use max byte-count, if bit 0/1 was one. */ + + vfenezf %v16,%v16,%v16 /* Find element not equal with zero search. */ + clgr %r1,%r3 + locgrh %r1,%r3 /* loaded_byte_count + = min (loaded_byte_count, maxlen) */ + + vlgvb %r5,%v16,7 /* Load zero index or 16 if not found. */ + clrjl %r5,%r1,.Lend /* Found zero within loaded bytes -> return. */ + + clgr %r1,%r3 /* If loaded_byte_count == maxlen -> end. */ + locgre %r5,%r3 + je .Lend + + /* 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. */ + + lgr %r1,%r5 /* If %r5 + 64 < maxlen? -> loop64. */ + aghi %r1,64 + clgrjl %r1,%r3,.Lloop64 + + /* Find zero in max 64byte with aligned s. */ +.Llt64: + vl %v16,0(%r5,%r2) /* Load s. */ + vfenezfs %v16,%v16,%v16 /* Find element not equal with zero search. */ + je .Lfound /* Jump away if zero was found. */ + aghi %r5,16 + clgrjhe %r5,%r3,.Lfound /* If current_len >= maxlen -> end. */ + vl %v16,0(%r5,%r2) + vfenezfs %v16,%v16,%v16 + je .Lfound + aghi %r5,16 + clgrjhe %r5,%r3,.Lfound + vl %v16,0(%r5,%r2) + vfenezfs %v16,%v16,%v16 + je .Lfound + aghi %r5,16 + clgrjhe %r5,%r3,.Lfound + vl %v16,0(%r5,%r2) + vfenezfs %v16,%v16,%v16 + j .Lfound + +.Lfound48: + aghi %r5,16 +.Lfound32: + aghi %r5,16 +.Lfound16: + aghi %r5,16 +.Lfound: + vlgvb %r4,%v16,7 /* Load byte index of zero or 16 if no zero. */ + algr %r5,%r4 + + clgr %r5,%r3 + locgrh %r5,%r3 /* Return min (current_len, maxlen). */ +.Lend: + srlg %r2,%r5,2 /* Convert byte-count to character-count. */ + br %r14 + + /* Find zero in 16byte aligned loop. */ +.Lloop64: + vl %v16,0(%r5,%r2) /* Load s. */ + vfenezfs %v16,%v16,%v16 /* Find element not equal with zero search. */ + je .Lfound /* Jump away if zero was found. */ + vl %v16,16(%r5,%r2) + vfenezfs %v16,%v16,%v16 + je .Lfound16 + vl %v16,32(%r5,%r2) + vfenezfs %v16,%v16,%v16 + je .Lfound32 + vl %v16,48(%r5,%r2) + vfenezfs %v16,%v16,%v16 + je .Lfound48 + + aghi %r5,64 + lgr %r1,%r5 /* If %r5 + 64 < maxlen? -> loop64. */ + aghi %r1,64 + clgrjl %r1,%r3,.Lloop64 + + j .Llt64 + +.Lfallback: + jg __wcsnlen_c +END(__wcsnlen_vx) +#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */ Index: glibc-2.22/sysdeps/s390/multiarch/wcsnlen.c =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/multiarch/wcsnlen.c @@ -0,0 +1,28 @@ +/* Multiple versions of wcsnlen. + 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 (__wcsnlen) +weak_alias (__wcsnlen, wcsnlen) + +#else +# include <wcsmbs/wcsnlen.c> +#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */ Index: glibc-2.22/wcsmbs/Makefile =================================================================== --- glibc-2.22.orig/wcsmbs/Makefile +++ glibc-2.22/wcsmbs/Makefile @@ -43,7 +43,7 @@ routines := wcscat wcschr wcscmp wcscpy isoc99_swscanf isoc99_vswscanf \ mbrtoc16 c16rtomb -strop-tests := wcscmp wcsncmp wmemcmp wcslen wcschr wcsrchr wcscpy +strop-tests := wcscmp wcsncmp wmemcmp wcslen wcschr wcsrchr wcscpy wcsnlen 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)) Index: glibc-2.22/wcsmbs/test-wcsnlen.c =================================================================== --- /dev/null +++ glibc-2.22/wcsmbs/test-wcsnlen.c @@ -0,0 +1,20 @@ +/* Test wcsnlen function. + 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-strnlen.c" Index: glibc-2.22/wcsmbs/wcsnlen.c =================================================================== --- glibc-2.22.orig/wcsmbs/wcsnlen.c +++ glibc-2.22/wcsmbs/wcsnlen.c @@ -18,8 +18,11 @@ #include <wchar.h> +#ifdef WCSNLEN +# define __wcsnlen WCSNLEN +#endif -/* Copy SRC to DEST. */ +/* Return length of string S at most maxlen. */ size_t __wcsnlen (s, maxlen) const wchar_t *s; @@ -44,4 +47,6 @@ __wcsnlen (s, maxlen) return len; } +#ifndef WCSNLEN weak_alias (__wcsnlen, wcsnlen) +#endif
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