diff options
| -rw-r--r-- | ChangeLog | 17 | ||||
| -rw-r--r-- | benchtests/Makefile | 2 | ||||
| -rw-r--r-- | benchtests/bench-strncmp.c | 110 | ||||
| -rw-r--r-- | benchtests/bench-wcsncmp.c | 20 | ||||
| -rw-r--r-- | sysdeps/s390/multiarch/Makefile | 6 | ||||
| -rw-r--r-- | sysdeps/s390/multiarch/ifunc-impl-list.c | 3 | ||||
| -rw-r--r-- | sysdeps/s390/multiarch/strncmp-c.c | 28 | ||||
| -rw-r--r-- | sysdeps/s390/multiarch/strncmp-vx.S | 137 | ||||
| -rw-r--r-- | sysdeps/s390/multiarch/strncmp.c | 30 | ||||
| -rw-r--r-- | sysdeps/s390/multiarch/wcsncmp-c.c | 25 | ||||
| -rw-r--r-- | sysdeps/s390/multiarch/wcsncmp-vx.S | 177 | ||||
| -rw-r--r-- | sysdeps/s390/multiarch/wcsncmp.c | 27 | ||||
| -rw-r--r-- | wcsmbs/wcsncmp.c | 5 |
13 files changed, 558 insertions, 29 deletions
diff --git a/ChangeLog b/ChangeLog index 8dfab01e79..a9cdda3f66 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,22 @@ 2015-08-26 Stefan Liebler <stli@linux.vnet.ibm.com> + * sysdeps/s390/multiarch/strncmp-c.c: New File. + * sysdeps/s390/multiarch/strncmp-vx.S: Likewise. + * sysdeps/s390/multiarch/strncmp.c: Likewise. + * sysdeps/s390/multiarch/wcsncmp-c.c: Likewise. + * sysdeps/s390/multiarch/wcsncmp-vx.S: Likewise. + * sysdeps/s390/multiarch/wcsncmp.c: Likewise. + * sysdeps/s390/multiarch/Makefile (sysdep_routines): Add strncmp and + wcsncmp functions. + * sysdeps/s390/multiarch/ifunc-impl-list.c + (__libc_ifunc_impl_list): Add ifunc test for strncmp, wcsncmp. + * wcsmbs/wcsncmp.c (WCSNCMP): Define and use macro. + * benchtests/bench-strncmp.c: Add wcsncmp support. + * benchtests/bench-wcsncmp.c: New File. + * benchtests/Makefile (wcsmbs-bench): Add wcsncmp. + +2015-08-26 Stefan Liebler <stli@linux.vnet.ibm.com> + * sysdeps/s390/multiarch/strcmp-vx.S: New File. * sysdeps/s390/multiarch/strcmp.c: Likewise. * sysdeps/s390/multiarch/wcscmp-c.c: Likewise. diff --git a/benchtests/Makefile b/benchtests/Makefile index b47d5c1d42..0a857974d2 100644 --- a/benchtests/Makefile +++ b/benchtests/Makefile @@ -37,7 +37,7 @@ string-bench := bcopy bzero memccpy memchr memcmp memcpy memmem memmove \ strspn strstr strcpy_chk stpcpy_chk memrchr strsep strtok \ strcoll wcsmbs-bench := wcslen wcsnlen wcscpy wcpcpy wcsncpy wcpncpy wcscat wcsncat \ - wcscmp + wcscmp wcsncmp string-bench-all := $(string-bench) ${wcsmbs-bench} # We have to generate locales diff --git a/benchtests/bench-strncmp.c b/benchtests/bench-strncmp.c index 1d06e5bb6e..3b264145a8 100644 --- a/benchtests/bench-strncmp.c +++ b/benchtests/bench-strncmp.c @@ -17,17 +17,68 @@ <http://www.gnu.org/licenses/>. */ #define TEST_MAIN -#define TEST_NAME "strncmp" +#ifdef WIDE +# define TEST_NAME "wcsncmp" +#else +# define TEST_NAME "strncmp" +#endif /* !WIDE */ #include "bench-string.h" -typedef int (*proto_t) (const char *, const char *, size_t); -int simple_strncmp (const char *, const char *, size_t); -int stupid_strncmp (const char *, const char *, size_t); +#ifdef WIDE +# include <wchar.h> -IMPL (stupid_strncmp, 0) -IMPL (simple_strncmp, 0) -IMPL (strncmp, 1) +# define L(str) L##str +# define STRNCMP wcsncmp +# define SIMPLE_STRNCMP simple_wcsncmp +# define STUPID_STRNCMP stupid_wcsncmp +# define CHAR wchar_t +# define CHARBYTES 4 +/* Wcsncmp uses signed semantics for comparison, not unsigned. + Avoid using substraction since possible overflow. */ +int +simple_wcsncmp (const CHAR *s1, const CHAR *s2, size_t n) +{ + wchar_t c1, c2; + + while (n--) + { + c1 = *s1++; + c2 = *s2++; + if (c1 == L ('\0') || c1 != c2) + return c1 > c2 ? 1 : (c1 < c2 ? -1 : 0); + } + return 0; +} + +int +stupid_wcsncmp (const CHAR *s1, const CHAR *s2, size_t n) +{ + wchar_t c1, c2; + size_t ns1 = wcsnlen (s1, n) + 1, ns2 = wcsnlen (s2, n) + 1; + + n = ns1 < n ? ns1 : n; + n = ns2 < n ? ns2 : n; + + while (n--) + { + c1 = *s1++; + c2 = *s2++; + if (c1 != c2) + return c1 > c2 ? 1 : -1; + } + return 0; +} + +#else +# define L(str) str +# define STRNCMP strncmp +# define SIMPLE_STRNCMP simple_strncmp +# define STUPID_STRNCMP stupid_strncmp +# define CHAR char +# define CHARBYTES 1 + +/* Strncmp uses unsigned semantics for comparison. */ int simple_strncmp (const char *s1, const char *s2, size_t n) { @@ -46,12 +97,21 @@ stupid_strncmp (const char *s1, const char *s2, size_t n) n = ns1 < n ? ns1 : n; n = ns2 < n ? ns2 : n; - while (n-- && (ret = *(unsigned char *) s1++ - * (unsigned char *) s2++) == 0); + while (n-- && (ret = *(unsigned char *) s1++ - *(unsigned char *) s2++) == 0); return ret; } +#endif /* !WIDE */ + +typedef int (*proto_t) (const CHAR *, const CHAR *, size_t); + +IMPL (STUPID_STRNCMP, 0) +IMPL (SIMPLE_STRNCMP, 0) +IMPL (STRNCMP, 1) + + static void -do_one_test (impl_t *impl, const char *s1, const char *s2, size_t n, +do_one_test (impl_t *impl, const CHAR *s1, const CHAR *s2, size_t n, int exp_result) { size_t i, iters = INNER_LOOP_ITERS; @@ -74,12 +134,12 @@ do_test_limit (size_t align1, size_t align2, size_t len, size_t n, int max_char, int exp_result) { size_t i, align_n; - char *s1, *s2; + CHAR *s1, *s2; if (n == 0) { - s1 = (char*)(buf1 + page_size); - s2 = (char*)(buf2 + page_size); + s1 = (CHAR *) (buf1 + page_size); + s2 = (CHAR *) (buf2 + page_size); printf ("Length %4zd/%4zd:", len, n); FOR_EACH_IMPL (impl, 0) @@ -92,16 +152,16 @@ do_test_limit (size_t align1, size_t align2, size_t len, size_t n, int max_char, align1 &= 15; align2 &= 15; - align_n = (page_size - n) & 15; + align_n = (page_size - n * CHARBYTES) & 15; - s1 = (char*)(buf1 + page_size - n); - s2 = (char*)(buf2 + page_size - n); + s1 = (CHAR *) (buf1 + page_size - n * CHARBYTES); + s2 = (CHAR *) (buf2 + page_size - n * CHARBYTES); if (align1 < align_n) - s1 -= (align_n - align1); + s1 = (CHAR *) ((char *) s1 - (align_n - align1)); if (align2 < align_n) - s2 -= (align_n - align2); + s2 = (CHAR *) ((char *) s2 - (align_n - align2)); for (i = 0; i < n; i++) s1[i] = s2[i] = 1 + 23 * i % max_char; @@ -129,24 +189,24 @@ do_test (size_t align1, size_t align2, size_t len, size_t n, int max_char, int exp_result) { size_t i; - char *s1, *s2; + CHAR *s1, *s2; if (n == 0) return; - align1 &= 7; - if (align1 + n + 1 >= page_size) + align1 &= 63; + if (align1 + (n + 1) * CHARBYTES >= page_size) return; align2 &= 7; - if (align2 + n + 1 >= page_size) + if (align2 + (n + 1) * CHARBYTES >= page_size) return; - s1 = (char*)(buf1 + align1); - s2 = (char*)(buf2 + align2); + s1 = (CHAR *) (buf1 + align1); + s2 = (CHAR *) (buf2 + align2); for (i = 0; i < n; i++) - s1[i] = s2[i] = 1 + 23 * i % max_char; + s1[i] = s2[i] = 1 + (23 << ((CHARBYTES - 1) * 8)) * i % max_char; s1[n] = 24 + exp_result; s2[n] = 23; @@ -162,7 +222,7 @@ do_test (size_t align1, size_t align2, size_t len, size_t n, int max_char, printf ("Length %4zd/%4zd, alignment %2zd/%2zd:", len, n, align1, align2); FOR_EACH_IMPL (impl, 0) - do_one_test (impl, (char*)s1, (char*)s2, n, exp_result); + do_one_test (impl, s1, s2, n, exp_result); putchar ('\n'); } diff --git a/benchtests/bench-wcsncmp.c b/benchtests/bench-wcsncmp.c new file mode 100644 index 0000000000..8720060b6b --- /dev/null +++ b/benchtests/bench-wcsncmp.c @@ -0,0 +1,20 @@ +/* Measure wcsncmp 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-strncmp.c" diff --git a/sysdeps/s390/multiarch/Makefile b/sysdeps/s390/multiarch/Makefile index d8fbd55ebb..d77bee5ef9 100644 --- a/sysdeps/s390/multiarch/Makefile +++ b/sysdeps/s390/multiarch/Makefile @@ -7,7 +7,8 @@ sysdep_routines += strlen strlen-vx strlen-c \ stpncpy stpncpy-vx stpncpy-c \ strcat strcat-vx strcat-c \ strncat strncat-vx strncat-c \ - strcmp strcmp-vx + strcmp strcmp-vx \ + strncmp strncmp-vx strncmp-c endif ifeq ($(subdir),wcsmbs) @@ -19,5 +20,6 @@ sysdep_routines += wcslen wcslen-vx wcslen-c \ wcpncpy wcpncpy-vx wcpncpy-c \ wcscat wcscat-vx wcscat-c \ wcsncat wcsncat-vx wcsncat-c \ - wcscmp wcscmp-vx wcscmp-c + wcscmp wcscmp-vx wcscmp-c \ + wcsncmp wcsncmp-vx wcsncmp-c endif diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c index 196d3ec95e..5bfc49395c 100644 --- a/sysdeps/s390/multiarch/ifunc-impl-list.c +++ b/sysdeps/s390/multiarch/ifunc-impl-list.c @@ -106,6 +106,9 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array, IFUNC_VX_IMPL (strcmp); IFUNC_VX_IMPL (wcscmp); + IFUNC_VX_IMPL (strncmp); + IFUNC_VX_IMPL (wcsncmp); + #endif /* HAVE_S390_VX_ASM_SUPPORT */ return i; diff --git a/sysdeps/s390/multiarch/strncmp-c.c b/sysdeps/s390/multiarch/strncmp-c.c new file mode 100644 index 0000000000..b32a994126 --- /dev/null +++ b/sysdeps/s390/multiarch/strncmp-c.c @@ -0,0 +1,28 @@ +/* Default strncmp 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 STRNCMP __strncmp_c +# ifdef SHARED +# undef libc_hidden_builtin_def +# define libc_hidden_builtin_def(name) \ + __hidden_ver1 (__strncmp_c, __GI_strncmp, __strncmp_c); +# endif /* SHARED */ + +# include <string/strncmp.c> +#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */ diff --git a/sysdeps/s390/multiarch/strncmp-vx.S b/sysdeps/s390/multiarch/strncmp-vx.S new file mode 100644 index 0000000000..ad010798d9 --- /dev/null +++ b/sysdeps/s390/multiarch/strncmp-vx.S @@ -0,0 +1,137 @@ +/* Vector optimized 32/64 bit S/390 version of strncmp. + 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 + +/* int strncmp (const char *s1, const char *s2, size_t n) + Compare at most n characters of two strings. + + Register usage: + -r0=tmp + -r1=tmp + -r2=s1 + -r3=s2 + -r4=n + -r5=current_len + -v16=part of s1 + -v17=part of s2 + -v18=index of unequal +*/ +ENTRY(__strncmp_vx) + .machine "z13" + .machinemode "zarch_nohighgprs" + +# if !defined __s390x__ + llgfr %r4,%r4 +# endif /* !defined __s390x__ */ + + clgije %r4,0,.Lend_equal /* Nothing to do if n == 0, */ + lghi %r5,0 /* current_len = 0. */ + +.Lloop: + vlbb %v16,0(%r5,%r2),6 /* Load s1 to block boundary. */ + vlbb %v17,0(%r5,%r3),6 /* Load s2 to block boundary. */ + lcbb %r0,0(%r5,%r2),6 /* Get loaded byte count of s1. */ + jo .Llt16_1 /* Jump away if vr is not fully loaded. */ + lcbb %r1,0(%r5,%r3),6 /* Get loaded byte count of s2. */ + jo .Llt16_2 /* Jump away if vr is not fully loaded. */ + aghi %r5,16 /* Both vrs are fully loaded. */ + clgrjhe %r5,%r4,.Llastcmp /* If current_len >= n ->last compare. */ + vfenezbs %v18,%v16,%v17 /* Compare not equal with zero search. */ + jno .Lfound + + vlbb %v16,0(%r5,%r2),6 + vlbb %v17,0(%r5,%r3),6 + lcbb %r0,0(%r5,%r2),6 + jo .Llt16_1 + lcbb %r1,0(%r5,%r3),6 + jo .Llt16_2 + aghi %r5,16 + clgrjhe %r5,%r4,.Llastcmp + vfenezbs %v18,%v16,%v17 + jno .Lfound + + vlbb %v16,0(%r5,%r2),6 + vlbb %v17,0(%r5,%r3),6 + lcbb %r0,0(%r5,%r2),6 + jo .Llt16_1 + lcbb %r1,0(%r5,%r3),6 + jo .Llt16_2 + aghi %r5,16 + clgrjhe %r5,%r4,.Llastcmp + vfenezbs %v18,%v16,%v17 + jno .Lfound + + vlbb %v16,0(%r5,%r2),6 + vlbb %v17,0(%r5,%r3),6 + lcbb %r0,0(%r5,%r2),6 + jo .Llt16_1 + lcbb %r1,0(%r5,%r3),6 + jo .Llt16_2 + aghi %r5,16 + clgrjhe %r5,%r4,.Llastcmp + vfenezbs %v18,%v16,%v17 + jno .Lfound + j .Lloop + +.Llt16_1: + lcbb %r1,0(%r5,%r3),6 /* Get loaded byte count ofs2. */ +.Llt16_2: + clr %r0,%r1 /* Compare logical. */ + locrh %r0,%r1 /* Compute minimum of bytes loaded. */ + algfr %r5,%r0 /* Add smallest loaded bytes to current_len. */ + clgrj %r5,%r4,10,.Llastcmp /* If current_len >= n ->last compare. */ + vfenezbs %v18,%v16,%v17 /* Compare not equal with zero search. */ + vlgvb %r1,%v18,7 /* Get not equal index or 16 if all equal. */ + clrjl %r1,%r0,.Lfound /* Jump away if miscompare is within + loaded bytes (index < loaded-bytes) */ + j .Lloop + +.Llastcmp: + /* Use comparision result only if located within first n characters. + %r0: loaded byte count in vreg; + %r5: current_len; + %r4: n; + (current_len - n): [0...16[ + First ignored match index: loaded bytes - (current_len-n): ]0...16] + */ + slgr %r5,%r4 /* %r5 = current_len - n. */ + slr %r0,%r5 /* %r0 = first ignored match index. */ + vfenezbs %v18,%v16,%v17 /* Compare not equal with zero search. */ + vlgvb %r1,%v18,7 /* Get not equal index or 16 if all equal. */ + clrjl %r1,%r0,.Lfound /* Jump away if miscompare is within + loaded bytes and below n bytes. */ + j .Lend_equal /* Miscompare after n-bytes -> end equal. */ + +.Lfound: + /* Difference or end of string. */ + je .Lend_equal + lghi %r2,1 + lghi %r1,-1 + locgrl %r2,%r1 + br %r14 +.Lend_equal: + lghi %r2,0 + br %r14 +END(__strncmp_vx) +#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */ diff --git a/sysdeps/s390/multiarch/strncmp.c b/sysdeps/s390/multiarch/strncmp.c new file mode 100644 index 0000000000..9accafcc32 --- /dev/null +++ b/sysdeps/s390/multiarch/strncmp.c @@ -0,0 +1,30 @@ +/* Multiple versions of strncmp. + 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> + + +# undef strcmp +extern __typeof (strncmp) __strncmp; +s390_vx_libc_ifunc2 (__strncmp, strncmp) + +#else +# include <string/strncmp.c> +#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */ diff --git a/sysdeps/s390/multiarch/wcsncmp-c.c b/sysdeps/s390/multiarch/wcsncmp-c.c new file mode 100644 index 0000000000..3d796caf31 --- /dev/null +++ b/sysdeps/s390/multiarch/wcsncmp-c.c @@ -0,0 +1,25 @@ +/* Default wcsncmp 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 WCSNCMP __wcsncmp_c + +# include <wchar.h> +extern __typeof (wcsncmp) __wcsncmp_c; +# include <wcsmbs/wcsncmp.c> +#endif diff --git a/sysdeps/s390/multiarch/wcsncmp-vx.S b/sysdeps/s390/multiarch/wcsncmp-vx.S new file mode 100644 index 0000000000..e13727b21d --- /dev/null +++ b/sysdeps/s390/multiarch/wcsncmp-vx.S @@ -0,0 +1,177 @@ +/* Vector optimized 32/64 bit S/390 version of wcsncmp. + 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 + +/* int wcsncmp (const wchar_t *s1, const wchar_t *s2, size_t n) + Compare at most n characters of two strings. + + Register usage: + -r0=tmp + -r1=tmp + -r2=s1 + -r3=s2 + -r4=n + -r5=current_len + -v16=part of s1 + -v17=part of s2 + -v18=index of unequal +*/ +ENTRY(__wcsncmp_vx) + .machine "z13" + .machinemode "zarch_nohighgprs" + +# if !defined __s390x__ + llgfr %r4,%r4 +# endif /* !defined __s390x__ */ + + clgije %r4,0,.Lend_equal /* Nothing to do if n == 0. */ + + /* Check range of n 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. */ + + /* Check first character without vector load. */ + lghi %r5,4 /* current_len = 4 bytes. */ + /* Check s1/2[0]. */ + lt %r0,0(%r2) + l %r1,0(%r3) + je .Lend_cmp_one_char + crjne %r0,%r1,.Lend_cmp_one_char + +.Lloop: + vlbb %v17,0(%r5,%r3),6 /* Load s2 to block boundary. */ + vlbb %v16,0(%r5,%r2),6 /* Load s1 to block boundary. */ + lcbb %r0,0(%r5,%r2),6 /* Get loaded byte count of s1. */ + jo .Llt16_1 /* Jump away if vector not fully loaded. */ + lcbb %r1,0(%r5,%r3),6 /* Get loaded byte count of s2. */ + jo .Llt16_2 /* Jump away if vector not fully loaded. */ + aghi %r5,16 /* Both vectors are fully loaded. */ + vfenezfs %v18,%v16,%v17 /* Compare not equal with zero search. */ + clgrjhe %r5,%r4,.Llastcmp /* If current_len >= n ->last compare. */ + jno .Lfound + + vlbb %v17,0(%r5,%r3),6 + vlbb %v16,0(%r5,%r2),6 + lcbb %r0,0(%r5,%r2),6 + jo .Llt16_1 + lcbb %r1,0(%r5,%r3),6 + jo .Llt16_2 + aghi %r5,16 + vfenezfs %v18,%v16,%v17 + clgrjhe %r5,%r4,.Llastcmp + jno .Lfound + + vlbb %v17,0(%r5,%r3),6 + vlbb %v16,0(%r5,%r2),6 + lcbb %r0,0(%r5,%r2),6 + jo .Llt16_1 + lcbb %r1,0(%r5,%r3),6 + jo .Llt16_2 + aghi %r5,16 + vfenezfs %v18,%v16,%v17 + clgrjhe %r5,%r4,.Llastcmp + jno .Lfound + + vlbb %v17,0(%r5,%r3),6 + vlbb %v16,0(%r5,%r2),6 + lcbb %r0,0(%r5,%r2),6 + jo .Llt16_1 + lcbb %r1,0(%r5,%r3),6 + jo .Llt16_2 + aghi %r5,16 + vfenezfs %v18,%v16,%v17 + clgrjhe %r5,%r4,.Llastcmp + jno .Lfound + + j .Lloop + +.Llt16_1: + lcbb %r1,0(%r5,%r3),6 /* Get loaded byte count of s2. */ +.Llt16_2: + clr %r0,%r1 /* Compare logical. */ + locrh %r0,%r1 /* Compute minimum of bytes loaded. */ + nill %r0,65532 /* Align bytes loaded to full characters. */ + jz .Lcmp_one_char /* Jump away if no full char is available. */ +.Llt_cmp: + algfr %r5,%r0 /* Add smallest loaded bytes to current_len. */ + vfenezfs %v18,%v16,%v17 /* Compare not equal with zero search. */ + clgrj %r5,%r4,10,.Llastcmp /* If current_len >= n -> last compare */ + vlgvb %r1,%v18,7 /* Get not equal index or 16 if all equal. */ + clrjl %r1,%r0,.Lfound /* Jump away if miscompare is within + loaded bytes; (index < loaded-bytes) */ + j .Lloop + +.Lcmp_one_char: + /* At least one of both strings is not 4-byte aligned + and there is no full character before next block-boundary. + Compare one character to get over the boundary and + proceed with normal loop! */ + vlef %v16,0(%r5,%r2),0 /* Load one character. */ + lghi %r0,4 /* Loaded byte count is 4. */ + vlef %v17,0(%r5,%r3),0 + j .Llt_cmp /* Proceed with comparision. */ + +.Llastcmp: + /* Use comparision result only if located within first n characters. + %r0: loaded byte count in vreg; + %r5: current_len; + %r4: n; + (current_len - n): [0...16[ + First ignored match index: loaded bytes - (current_len-n): ]0...16] + */ + slgr %r5,%r4 /* %r5 = current_len - n. */ + slr %r0,%r5 /* %r0 = first ignored match index. */ + vlgvb %r4,%v18,7 /* Get not equal index or 16 if all equal. */ + clrjl %r4,%r0,.Lfound2 /* Jump away if miscompare is within + loaded bytes and below n bytes. */ +.Lend_equal: + lghi %r2,0 + br %r14 + +.Lfound: + /* Difference or end of string. */ + /* vfenezf found an unequal element or zero. + This instruction compares unsigned words, but wchar_t is signed. + Thus we have to compare the found element again. */ + vlgvb %r4,%v18,7 /* Extract not equal byte-index. */ +.Lfound2: + srl %r4,2 /* And convert it to character-index. */ + vlgvf %r0,%v16,0(%r4) /* Load character-values. */ + vlgvf %r1,%v17,0(%r4) +.Lend_cmp_one_char: + cr %r0,%r1 + je .Lend_equal + lghi %r2,1 + lghi %r1,-1 + locgrl %r2,%r1 + br %r14 +END(__wcsncmp_vx) +#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */ diff --git a/sysdeps/s390/multiarch/wcsncmp.c b/sysdeps/s390/multiarch/wcsncmp.c new file mode 100644 index 0000000000..165c00251e --- /dev/null +++ b/sysdeps/s390/multiarch/wcsncmp.c @@ -0,0 +1,27 @@ +/* Multiple versions of wcsncmp. + 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_ifunc2 (__wcsncmp, wcsncmp) + +#else +# include <wcsmbs/wcsncmp.c> +#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */ diff --git a/wcsmbs/wcsncmp.c b/wcsmbs/wcsncmp.c index e083ad8174..4de2ca8c0a 100644 --- a/wcsmbs/wcsncmp.c +++ b/wcsmbs/wcsncmp.c @@ -18,13 +18,16 @@ #include <wchar.h> +#ifndef WCSNCMP +# define WCSNCMP wcsncmp +#endif /* Compare no more than N characters of S1 and S2, returning less than, equal to or greater than zero if S1 is lexicographically less than, equal to or greater than S2. */ int -wcsncmp (s1, s2, n) +WCSNCMP (s1, s2, n) const wchar_t *s1; const wchar_t *s2; size_t n; |