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0014-S390-Optimize-strncpy-and-wcsncpy.patch
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File 0014-S390-Optimize-strncpy-and-wcsncpy.patch of Package glibc-utils.7879
2015-08-26 Stefan Liebler <stli@linux.vnet.ibm.com> * sysdeps/s390/multiarch/strncpy-vx.S: New File. * sysdeps/s390/multiarch/strncpy.c: Likewise. * sysdeps/s390/multiarch/wcsncpy-c.c: Likewise. * sysdeps/s390/multiarch/wcsncpy-vx.S: Likewise. * sysdeps/s390/multiarch/wcsncpy.c: Likewise. * sysdeps/s390/s390-32/multiarch/strncpy.c: Likewise. * sysdeps/s390/s390-64/multiarch/strncpy.c: Likewise. * sysdeps/s390/multiarch/Makefile (sysdep_routines): Add strncpy and wcsncpy functions. * wcsmbs/wcsncpy.c: Use WCSNCPY if defined. * sysdeps/s390/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Add ifunc test for strncpy, wcsncpy. * string/test-strncpy.c: Add wcsncpy support. * wcsmbs/test-wcsncpy.c: New File. * wcsmbs/Makefile (strop-tests): Add wcsncpy. * benchtests/bench-strncpy.c: Add wcsncpy support. * benchtests/bench-wcsncpy.c: New File. * benchtests/Makefile (wcsmbs-bench): Add wcsncpy 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 wcsnlen wcscpy wcpcpy +wcsmbs-bench := wcslen wcsnlen wcscpy wcpcpy wcsncpy string-bench-all := $(string-bench) ${wcsmbs-bench} # We have to generate locales Index: glibc-2.22/benchtests/bench-strncpy.c =================================================================== --- glibc-2.22.orig/benchtests/bench-strncpy.c +++ glibc-2.22/benchtests/bench-strncpy.c @@ -16,23 +16,56 @@ License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ +#ifdef WIDE +# include <wchar.h> +# define CHAR wchar_t +# define UCHAR wchar_t +# define BIG_CHAR WCHAR_MAX +# define SMALL_CHAR 1273 +# define MEMCMP wmemcmp +# define MEMSET wmemset +# define STRNLEN wcsnlen +#else +# define CHAR char +# define UCHAR unsigned char +# define BIG_CHAR CHAR_MAX +# define SMALL_CHAR 127 +# define MEMCMP memcmp +# define MEMSET memset +# define STRNLEN strnlen +#endif /* !WIDE */ + + #ifndef STRNCPY_RESULT # define STRNCPY_RESULT(dst, len, n) dst # define TEST_MAIN -# define TEST_NAME "strncpy" +# ifndef WIDE +# define TEST_NAME "strncpy" +# else +# define TEST_NAME "wcsncpy" +# endif /* WIDE */ # include "bench-string.h" +# ifndef WIDE +# define SIMPLE_STRNCPY simple_strncpy +# define STUPID_STRNCPY stupid_strncpy +# define STRNCPY strncpy +# else +# define SIMPLE_STRNCPY simple_wcsncpy +# define STUPID_STRNCPY stupid_wcsncpy +# define STRNCPY wcsncpy +# endif /* WIDE */ + +CHAR *SIMPLE_STRNCPY (CHAR *, const CHAR *, size_t); +CHAR *STUPID_STRNCPY (CHAR *, const CHAR *, size_t); + +IMPL (STUPID_STRNCPY, 0) +IMPL (SIMPLE_STRNCPY, 0) +IMPL (STRNCPY, 1) -char *simple_strncpy (char *, const char *, size_t); -char *stupid_strncpy (char *, const char *, size_t); - -IMPL (stupid_strncpy, 0) -IMPL (simple_strncpy, 0) -IMPL (strncpy, 1) - -char * -simple_strncpy (char *dst, const char *src, size_t n) +CHAR * +SIMPLE_STRNCPY (CHAR *dst, const CHAR *src, size_t n) { - char *ret = dst; + CHAR *ret = dst; while (n--) if ((*dst++ = *src++) == '\0') { @@ -43,10 +76,10 @@ simple_strncpy (char *dst, const char *s return ret; } -char * -stupid_strncpy (char *dst, const char *src, size_t n) +CHAR * +STUPID_STRNCPY (CHAR *dst, const CHAR *src, size_t n) { - size_t nc = strnlen (src, n); + size_t nc = STRNLEN (src, n); size_t i; for (i = 0; i < nc; ++i) @@ -55,12 +88,12 @@ stupid_strncpy (char *dst, const char *s dst[i] = '\0'; return dst; } -#endif +#endif /* !STRNCPY_RESULT */ -typedef char *(*proto_t) (char *, const char *, size_t); +typedef CHAR *(*proto_t) (CHAR *, const CHAR *, size_t); static void -do_one_test (impl_t *impl, char *dst, const char *src, size_t len, size_t n) +do_one_test (impl_t *impl, CHAR *dst, const CHAR *src, size_t len, size_t n) { size_t i, iters = INNER_LOOP_ITERS; timing_t start, stop, cur; @@ -73,7 +106,7 @@ do_one_test (impl_t *impl, char *dst, co return; } - if (memcmp (dst, src, len > n ? n : len) != 0) + if (memcmp (dst, src, (len > n ? n : len) * sizeof (CHAR)) != 0) { error (0, 0, "Wrong result in function %s", impl->name); ret = 1; @@ -109,23 +142,26 @@ static void do_test (size_t align1, size_t align2, size_t len, size_t n, int max_char) { size_t i; - char *s1, *s2; + CHAR *s1, *s2; +/* For wcsncpy: align1 and align2 here mean alignment not in bytes, + but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t)). */ align1 &= 7; - if (align1 + len >= page_size) + if ((align1 + len) * sizeof (CHAR) >= page_size) return; align2 &= 7; - if (align2 + len >= page_size) + if ((align2 + len) * sizeof (CHAR) >= page_size) return; - s1 = (char *) (buf1 + align1); - s2 = (char *) (buf2 + align2); + s1 = (CHAR *) (buf1) + align1; + s2 = (CHAR *) (buf2) + align2; for (i = 0; i < len; ++i) s1[i] = 32 + 23 * i % (max_char - 32); s1[len] = 0; - for (i = len + 1; i + align1 < page_size && i < len + 64; ++i) + for (i = len + 1; (i + align1) * sizeof (CHAR) < page_size && i < len + 64; + ++i) s1[i] = 32 + 32 * i % (max_char - 32); printf ("Length %4zd, n %4zd, alignment %2zd/%2zd:", len, n, align1, align2); @@ -150,22 +186,22 @@ test_main (void) for (i = 1; i < 8; ++i) { - do_test (i, i, 16, 16, 127); - do_test (i, i, 16, 16, 255); - do_test (i, 2 * i, 16, 16, 127); - do_test (2 * i, i, 16, 16, 255); - do_test (8 - i, 2 * i, 1 << i, 2 << i, 127); - do_test (2 * i, 8 - i, 2 << i, 1 << i, 127); - do_test (8 - i, 2 * i, 1 << i, 2 << i, 255); - do_test (2 * i, 8 - i, 2 << i, 1 << i, 255); + do_test (i, i, 16, 16, SMALL_CHAR); + do_test (i, i, 16, 16, BIG_CHAR); + do_test (i, 2 * i, 16, 16, SMALL_CHAR); + do_test (2 * i, i, 16, 16, BIG_CHAR); + do_test (8 - i, 2 * i, 1 << i, 2 << i, SMALL_CHAR); + do_test (2 * i, 8 - i, 2 << i, 1 << i, SMALL_CHAR); + do_test (8 - i, 2 * i, 1 << i, 2 << i, BIG_CHAR); + do_test (2 * i, 8 - i, 2 << i, 1 << i, BIG_CHAR); } for (i = 1; i < 8; ++i) { - do_test (0, 0, 4 << i, 8 << i, 127); - do_test (0, 0, 16 << i, 8 << i, 127); - do_test (8 - i, 2 * i, 4 << i, 8 << i, 127); - do_test (8 - i, 2 * i, 16 << i, 8 << i, 127); + do_test (0, 0, 4 << i, 8 << i, SMALL_CHAR); + do_test (0, 0, 16 << i, 8 << i, SMALL_CHAR); + do_test (8 - i, 2 * i, 4 << i, 8 << i, SMALL_CHAR); + do_test (8 - i, 2 * i, 16 << i, 8 << i, SMALL_CHAR); } return ret; Index: glibc-2.22/benchtests/bench-wcsncpy.c =================================================================== --- /dev/null +++ glibc-2.22/benchtests/bench-wcsncpy.c @@ -0,0 +1,20 @@ +/* Measure wcsncpy 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-strncpy.c" Index: glibc-2.22/string/test-strncpy.c =================================================================== --- glibc-2.22.orig/string/test-strncpy.c +++ glibc-2.22/string/test-strncpy.c @@ -1,4 +1,4 @@ -/* Test and measure strncpy functions. +/* Test strncpy 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. @@ -17,23 +17,56 @@ License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ +#ifdef WIDE +# include <wchar.h> +# define CHAR wchar_t +# define UCHAR wchar_t +# define BIG_CHAR WCHAR_MAX +# define SMALL_CHAR 1273 +# define MEMCMP wmemcmp +# define MEMSET wmemset +# define STRNLEN wcsnlen +#else +# define CHAR char +# define UCHAR unsigned char +# define BIG_CHAR CHAR_MAX +# define SMALL_CHAR 127 +# define MEMCMP memcmp +# define MEMSET memset +# define STRNLEN strnlen +#endif /* !WIDE */ + + #ifndef STRNCPY_RESULT # define STRNCPY_RESULT(dst, len, n) dst # define TEST_MAIN -# define TEST_NAME "strncpy" +# ifndef WIDE +# define TEST_NAME "strncpy" +# else +# define TEST_NAME "wcsncpy" +# endif /* WIDE */ # include "test-string.h" +# ifndef WIDE +# define SIMPLE_STRNCPY simple_strncpy +# define STUPID_STRNCPY stupid_strncpy +# define STRNCPY strncpy +# else +# define SIMPLE_STRNCPY simple_wcsncpy +# define STUPID_STRNCPY stupid_wcsncpy +# define STRNCPY wcsncpy +# endif /* WIDE */ + +CHAR *SIMPLE_STRNCPY (CHAR *, const CHAR *, size_t); +CHAR *STUPID_STRNCPY (CHAR *, const CHAR *, size_t); + +IMPL (STUPID_STRNCPY, 0) +IMPL (SIMPLE_STRNCPY, 0) +IMPL (STRNCPY, 1) -char *simple_strncpy (char *, const char *, size_t); -char *stupid_strncpy (char *, const char *, size_t); - -IMPL (stupid_strncpy, 0) -IMPL (simple_strncpy, 0) -IMPL (strncpy, 1) - -char * -simple_strncpy (char *dst, const char *src, size_t n) +CHAR * +SIMPLE_STRNCPY (CHAR *dst, const CHAR *src, size_t n) { - char *ret = dst; + CHAR *ret = dst; while (n--) if ((*dst++ = *src++) == '\0') { @@ -44,10 +77,10 @@ simple_strncpy (char *dst, const char *s return ret; } -char * -stupid_strncpy (char *dst, const char *src, size_t n) +CHAR * +STUPID_STRNCPY (CHAR *dst, const CHAR *src, size_t n) { - size_t nc = strnlen (src, n); + size_t nc = STRNLEN (src, n); size_t i; for (i = 0; i < nc; ++i) @@ -56,12 +89,12 @@ stupid_strncpy (char *dst, const char *s dst[i] = '\0'; return dst; } -#endif +#endif /* !STRNCPY_RESULT */ -typedef char *(*proto_t) (char *, const char *, size_t); +typedef CHAR *(*proto_t) (CHAR *, const CHAR *, size_t); static void -do_one_test (impl_t *impl, char *dst, const char *src, size_t len, size_t n) +do_one_test (impl_t *impl, CHAR *dst, const CHAR *src, size_t len, size_t n) { if (CALL (impl, dst, src, n) != STRNCPY_RESULT (dst, len, n)) { @@ -71,7 +104,7 @@ do_one_test (impl_t *impl, char *dst, co return; } - if (memcmp (dst, src, len > n ? n : len) != 0) + if (memcmp (dst, src, (len > n ? n : len) * sizeof (CHAR)) != 0) { error (0, 0, "Wrong result in function %s", impl->name); ret = 1; @@ -96,23 +129,26 @@ static void do_test (size_t align1, size_t align2, size_t len, size_t n, int max_char) { size_t i; - char *s1, *s2; + CHAR *s1, *s2; +/* For wcsncpy: align1 and align2 here mean alignment not in bytes, + but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t)). */ align1 &= 7; - if (align1 + len >= page_size) + if ((align1 + len) * sizeof (CHAR) >= page_size) return; align2 &= 7; - if (align2 + len >= page_size) + if ((align2 + len) * sizeof (CHAR) >= page_size) return; - s1 = (char *) (buf1 + align1); - s2 = (char *) (buf2 + align2); + s1 = (CHAR *) (buf1) + align1; + s2 = (CHAR *) (buf2) + align2; for (i = 0; i < len; ++i) s1[i] = 32 + 23 * i % (max_char - 32); s1[len] = 0; - for (i = len + 1; i + align1 < page_size && i < len + 64; ++i) + for (i = len + 1; (i + align1) * sizeof (CHAR) < page_size && i < len + 64; + ++i) s1[i] = 32 + 32 * i % (max_char - 32); FOR_EACH_IMPL (impl, 0) @@ -123,12 +159,16 @@ static void do_random_tests (void) { size_t i, j, n, align1, align2, len, size, mode; - unsigned char *p1 = buf1 + page_size - 512; - unsigned char *p2 = buf2 + page_size - 512; - unsigned char *res; + UCHAR *p1 = (UCHAR *) (buf1 + page_size) - 512; + UCHAR *p2 = (UCHAR *) (buf2 + page_size) - 512; + UCHAR *res; for (n = 0; n < ITERATIONS; n++) { + /* For wcsncpy: align1 and align2 here mean align not in bytes, + but in wchar_ts, in bytes it will equal to align * (sizeof + (wchar_t)). */ + mode = random (); if (mode & 1) { @@ -166,7 +206,7 @@ do_random_tests (void) { size = random () & 511; if (size + j > 512) - size = 512 - j - (random() & 31); + size = 512 - j - (random () & 31); } else size = 512 - j; @@ -182,18 +222,17 @@ do_random_tests (void) p1[i] = 0; else { - p1[i] = random () & 255; + p1[i] = random () & BIG_CHAR; if (i >= align1 && i < len + align1 && !p1[i]) - p1[i] = (random () & 127) + 3; + p1[i] = (random () & SMALL_CHAR) + 3; } } FOR_EACH_IMPL (impl, 1) { - memset (p2 - 64, '\1', 512 + 64); - res = (unsigned char *) CALL (impl, - (char *) (p2 + align2), - (char *) (p1 + align1), size); + MEMSET (p2 - 64, '\1', 512 + 64); + res = (UCHAR *) CALL (impl, (CHAR *) (p2 + align2), + (CHAR *) (p1 + align1), size); if (res != STRNCPY_RESULT (p2 + align2, len, size)) { error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p", @@ -235,7 +274,7 @@ do_random_tests (void) j = len + 1; if (size < j) j = size; - if (memcmp (p1 + align1, p2 + align2, j)) + if (MEMCMP (p1 + align1, p2 + align2, j)) { error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)", n, impl->name, align1, align2, len); @@ -259,22 +298,22 @@ test_main (void) for (i = 1; i < 8; ++i) { - do_test (i, i, 16, 16, 127); - do_test (i, i, 16, 16, 255); - do_test (i, 2 * i, 16, 16, 127); - do_test (2 * i, i, 16, 16, 255); - do_test (8 - i, 2 * i, 1 << i, 2 << i, 127); - do_test (2 * i, 8 - i, 2 << i, 1 << i, 127); - do_test (8 - i, 2 * i, 1 << i, 2 << i, 255); - do_test (2 * i, 8 - i, 2 << i, 1 << i, 255); + do_test (i, i, 16, 16, SMALL_CHAR); + do_test (i, i, 16, 16, BIG_CHAR); + do_test (i, 2 * i, 16, 16, SMALL_CHAR); + do_test (2 * i, i, 16, 16, BIG_CHAR); + do_test (8 - i, 2 * i, 1 << i, 2 << i, SMALL_CHAR); + do_test (2 * i, 8 - i, 2 << i, 1 << i, SMALL_CHAR); + do_test (8 - i, 2 * i, 1 << i, 2 << i, BIG_CHAR); + do_test (2 * i, 8 - i, 2 << i, 1 << i, BIG_CHAR); } for (i = 1; i < 8; ++i) { - do_test (0, 0, 4 << i, 8 << i, 127); - do_test (0, 0, 16 << i, 8 << i, 127); - do_test (8 - i, 2 * i, 4 << i, 8 << i, 127); - do_test (8 - i, 2 * i, 16 << i, 8 << i, 127); + do_test (0, 0, 4 << i, 8 << i, SMALL_CHAR); + do_test (0, 0, 16 << i, 8 << i, SMALL_CHAR); + do_test (8 - i, 2 * i, 4 << i, 8 << i, SMALL_CHAR); + do_test (8 - i, 2 * i, 16 << i, 8 << i, SMALL_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 @@ -2,12 +2,14 @@ ifeq ($(subdir),string) sysdep_routines += strlen strlen-vx strlen-c \ strnlen strnlen-vx strnlen-c \ strcpy strcpy-vx \ - stpcpy stpcpy-vx stpcpy-c + stpcpy stpcpy-vx stpcpy-c \ + strncpy strncpy-vx endif ifeq ($(subdir),wcsmbs) sysdep_routines += wcslen wcslen-vx wcslen-c \ wcsnlen wcsnlen-vx wcsnlen-c \ wcscpy wcscpy-vx wcscpy-c \ - wcpcpy wcpcpy-vx wcpcpy-c + wcpcpy wcpcpy-vx wcpcpy-c \ + wcsncpy wcsncpy-vx wcsncpy-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 @@ -91,6 +91,9 @@ __libc_ifunc_impl_list (const char *name IFUNC_VX_IMPL (stpcpy); IFUNC_VX_IMPL (wcpcpy); + IFUNC_VX_IMPL (strncpy); + IFUNC_VX_IMPL (wcsncpy); + #endif /* HAVE_S390_VX_ASM_SUPPORT */ return i; Index: glibc-2.22/sysdeps/s390/multiarch/strncpy-vx.S =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/multiarch/strncpy-vx.S @@ -0,0 +1,207 @@ +/* Vector optimized 32/64 bit S/390 version of strncpy. + 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 + +/* char * strncpy (const char *dest, const char *src, size_t n) + Copy at most n characters of string src to dest. + + Register usage: + -r0=dest pointer for return + -r1=tmp, zero byte index + -r2=dest + -r3=src + -r4=n + -r5=current_len + -r6=tmp, loaded bytes + -r7=tmp, border + -v16=part of src + -v17=index of zero + -v18=part of src + -v31=register save area for r6, r7 +*/ +ENTRY(__strncpy_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. */ + lgr %r0,%r2 /* Save destination pointer for return. */ + vlvgp %v31,%r6,%r7 /* Save registers. */ + + vlbb %v16,0(%r3),6 /* Load s until next 4k-byte boundary. */ + lcbb %r6,0(%r3),6 /* Get bytes to 4k-byte boundary or 16. */ + llgfr %r6,%r6 /* Convert 32bit to 64bit. */ + + lghi %r5,0 /* current_len = 0. */ + + clgrjle %r4,%r6,.Lremaining_v16 /* If n <= loaded-bytes + -> process remaining. */ + + /* n > loaded-byte-count. */ + vfenezb %v17,%v16,%v16 /* Find element not equal with zero search. */ + vlgvb %r1,%v17,7 /* Load zero index or 16 if not found. */ + 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. */ + 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) /* Store previous part without zero to dst. */ + aghi %r5,16 + + clgrjhe %r5,%r7,.Lremaining_v18 + vfenezbs %v17,%v18,%v18 + je .Lfound_v18 + vl %v16,16(%r5,%r3) + vst %v18,0(%r5,%r2) + aghi %r5,16 + + clgrjhe %r5,%r7,.Lremaining_v16 + vfenezbs %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. */ + vfenezb %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. */ + /* Zero in remaining bytes? -> jump away (zero-index < max-index) + Do not jump away if zero-index == max-index, + but simply copy zero with vstl below. */ + clrjl %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. */ +.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 /* = n - (current_len + zero_index + 1). */ + la %r2,0(%r1,%r2) /* Pointer to zero. start filling beyond. */ + 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) /* Load s. */ + 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) /* 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 + 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(__strncpy_vx) + +# define strncpy __strncpy_c +# undef libc_hidden_builtin_def +# define libc_hidden_builtin_def(name) strong_alias(__strncpy_c, __GI_strncpy) +#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */ + +/* Include strncpy-implementation in s390-32/s390-64 subdirectory. */ +#include <strncpy.S> Index: glibc-2.22/sysdeps/s390/multiarch/strncpy.c =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/multiarch/strncpy.c @@ -0,0 +1,24 @@ +/* Multiple versions of strncpy. + 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_ifunc2 (__strncpy, strncpy) +#endif Index: glibc-2.22/sysdeps/s390/multiarch/wcsncpy-c.c =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/multiarch/wcsncpy-c.c @@ -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 WCSNCPY __wcsncpy_c + +# include <wchar.h> +extern __typeof (__wcsncpy) __wcsncpy_c; +# include <wcsmbs/wcsncpy.c> +#endif Index: glibc-2.22/sysdeps/s390/multiarch/wcsncpy-vx.S =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/multiarch/wcsncpy-vx.S @@ -0,0 +1,223 @@ +/* Vector optimized 32/64 bit S/390 version of wcsncpy. + 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 *wcsncpy (const wchar_t *dest, const wchar_t *src, size_t n) + Copy at most n characters of string src to dest. + + Register usage: + -r0=dest pointer for return + -r1=tmp, zero byte index + -r2=dest + -r3=src + -r4=n + -r5=current_len + -r6=tmp, loaded bytes + -r7=tmp, border + -v16=part of src + -v17=index of zero + -v18=part of src + -v31=register save area for r6, r7 +*/ +ENTRY(__wcsncpy_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. */ + lgr %r0,%r2 /* Save destination pointer for return. */ + + lcbb %r6,0(%r3),6 /* Get bytes to 4k-byte boundary or 16. */ + llgfr %r6,%r6 /* Convert 32bit to 64bit. */ + + lghi %r5,0 /* current_len = 0. */ + + /* Check range of maxlen and convert to byte-count. */ +# ifdef __s390x__ + tmhh %r4,49152 /* Test bit 0 or 1 of n. */ + lghi %r1,-4 /* Max byte-count is 18446744073709551612. */ +# else + tmlh %r4,49152 /* Test bit 0 or 1 of n. */ + 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. */ + + 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 = maxlen - 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) + Do not jump away if zero-index == max-index, + but simply copy zero with vstl below. */ + clrjl %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 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. */ + 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) /* Load s. */ + 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 __wcsncpy_c +END(__wcsncpy_vx) + +#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */ Index: glibc-2.22/sysdeps/s390/multiarch/wcsncpy.c =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/multiarch/wcsncpy.c @@ -0,0 +1,28 @@ +/* Multiple versions of wcsncpy. + 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 (__wcsncpy) +weak_alias (__wcsncpy, wcsncpy) + +#else +# include <wcsmbs/wcsncpy.c> +#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */ Index: glibc-2.22/sysdeps/s390/s390-32/multiarch/strncpy.c =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/s390-32/multiarch/strncpy.c @@ -0,0 +1,21 @@ +/* Multiple versions of strncpy. + 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/>. */ + +/* This wrapper-file is needed, because otherwise file + sysdeps/s390/s390-[32|64]/strncpy.S will be used. */ +#include <sysdeps/s390/multiarch/strncpy.c> Index: glibc-2.22/sysdeps/s390/s390-64/multiarch/strncpy.c =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/s390-64/multiarch/strncpy.c @@ -0,0 +1,21 @@ +/* Multiple versions of strncpy. + 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/>. */ + +/* This wrapper-file is needed, because otherwise file + sysdeps/s390/s390-[32|64]/strncpy.S will be used. */ +#include <sysdeps/s390/multiarch/strncpy.c> Index: glibc-2.22/wcsmbs/Makefile =================================================================== --- glibc-2.22.orig/wcsmbs/Makefile +++ glibc-2.22/wcsmbs/Makefile @@ -44,7 +44,7 @@ routines := wcscat wcschr wcscmp wcscpy mbrtoc16 c16rtomb strop-tests := wcscmp wcsncmp wmemcmp wcslen wcschr wcsrchr wcscpy wcsnlen \ - wcpcpy + wcpcpy wcsncpy 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-wcsncpy.c =================================================================== --- /dev/null +++ glibc-2.22/wcsmbs/test-wcsncpy.c @@ -0,0 +1,20 @@ +/* Test wcsncpy 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-strncpy.c" Index: glibc-2.22/wcsmbs/wcsncpy.c =================================================================== --- glibc-2.22.orig/wcsmbs/wcsncpy.c +++ glibc-2.22/wcsmbs/wcsncpy.c @@ -18,6 +18,9 @@ #include <wchar.h> +#ifdef WCSNCPY +# define __wcsncpy WCSNCPY +#endif /* Copy no more than N wide-characters of SRC to DEST. */ wchar_t * @@ -83,4 +86,6 @@ __wcsncpy (dest, src, n) return s; } +#ifndef WCSNCPY weak_alias (__wcsncpy, wcsncpy) +#endif
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