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glibc.7657
0018-S390-Optimize-strcmp-and-wcscmp.patch
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File 0018-S390-Optimize-strcmp-and-wcscmp.patch of Package glibc.7657
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. * sysdeps/s390/multiarch/wcscmp-vx.S: Likewise. * sysdeps/s390/multiarch/wcscmp.c: Likewise. * sysdeps/s390/s390-32/multiarch/strcmp.c: Likewise. * sysdeps/s390/s390-64/multiarch/strcmp.c: Likewise. * sysdeps/s390/multiarch/Makefile (sysdep_routines): Add strcmp and wcscmp functions. * sysdeps/s390/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Add ifunc test for strcmp, wcscmp. * string/strcmp.c (STRCMP): Define and use macro. * benchtests/bench-wcscmp.c: New File. * benchtests/Makefile (wcsmbs-bench): Add wcscmp. * sysdeps/s390/bits/string.h: Fix typo: _HAVE_STRING_ARCH_strcmp instead of _HAVE_STRING_ARCH_memchr. Index: glibc-2.22/benchtests/Makefile =================================================================== --- glibc-2.22.orig/benchtests/Makefile +++ glibc-2.22/benchtests/Makefile @@ -36,7 +36,8 @@ 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 wcsncpy wcpncpy wcscat wcsncat +wcsmbs-bench := wcslen wcsnlen wcscpy wcpcpy wcsncpy wcpncpy wcscat wcsncat \ + wcscmp string-bench-all := $(string-bench) ${wcsmbs-bench} # We have to generate locales Index: glibc-2.22/benchtests/bench-wcscmp.c =================================================================== --- /dev/null +++ glibc-2.22/benchtests/bench-wcscmp.c @@ -0,0 +1,20 @@ +/* Measure wcscmp 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-strcmp.c" Index: glibc-2.22/string/strcmp.c =================================================================== --- glibc-2.22.orig/string/strcmp.c +++ glibc-2.22/string/strcmp.c @@ -19,11 +19,15 @@ #undef strcmp +#ifndef STRCMP +# define STRCMP strcmp +#endif + /* Compare 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 -strcmp (const char *p1, const char *p2) +STRCMP (const char *p1, const char *p2) { const unsigned char *s1 = (const unsigned char *) p1; const unsigned char *s2 = (const unsigned char *) p2; Index: glibc-2.22/sysdeps/s390/bits/string.h =================================================================== --- glibc-2.22.orig/sysdeps/s390/bits/string.h +++ glibc-2.22/sysdeps/s390/bits/string.h @@ -226,8 +226,8 @@ memchr (const void *__str, int __c, size } #endif -/* Search N bytes of S for C. */ -#define _HAVE_STRING_ARCH_memchr 1 +/* Compare S1 and S2. */ +#define _HAVE_STRING_ARCH_strcmp 1 #ifndef _FORCE_INLINES __STRING_INLINE int strcmp (const char *__s1, const char *__s2) Index: glibc-2.22/sysdeps/s390/multiarch/Makefile =================================================================== --- glibc-2.22.orig/sysdeps/s390/multiarch/Makefile +++ glibc-2.22/sysdeps/s390/multiarch/Makefile @@ -6,7 +6,8 @@ sysdep_routines += strlen strlen-vx strl strncpy strncpy-vx \ stpncpy stpncpy-vx stpncpy-c \ strcat strcat-vx strcat-c \ - strncat strncat-vx strncat-c + strncat strncat-vx strncat-c \ + strcmp strcmp-vx endif ifeq ($(subdir),wcsmbs) @@ -17,5 +18,6 @@ sysdep_routines += wcslen wcslen-vx wcsl wcsncpy wcsncpy-vx wcsncpy-c \ wcpncpy wcpncpy-vx wcpncpy-c \ wcscat wcscat-vx wcscat-c \ - wcsncat wcsncat-vx wcsncat-c + wcsncat wcsncat-vx wcsncat-c \ + wcscmp wcscmp-vx wcscmp-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 @@ -103,6 +103,9 @@ __libc_ifunc_impl_list (const char *name IFUNC_VX_IMPL (strncat); IFUNC_VX_IMPL (wcsncat); + IFUNC_VX_IMPL (strcmp); + IFUNC_VX_IMPL (wcscmp); + #endif /* HAVE_S390_VX_ASM_SUPPORT */ return i; Index: glibc-2.22/sysdeps/s390/multiarch/strcmp-vx.S =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/multiarch/strcmp-vx.S @@ -0,0 +1,116 @@ +/* Vector optimized 32/64 bit S/390 version of strcmp. + 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 strcmp (const char *s1, const char *s2) + Compare two strings + + Register usage: + -r1=loaded byte count s1 + -r2=s1 + -r3=s2 + -r4=loaded byte coutn s2, tmp + -r5=current_len + -v16=part of s1 + -v17=part of s2 + -v18=index of unequal +*/ +ENTRY(__strcmp_vx) + .machine "z13" + .machinemode "zarch_nohighgprs" + + 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 %r1,0(%r5,%r2),6 /* Get loaded byte count of s1. */ + jo .Llt16_1 /* Jump away if vr is not fully loaded. */ + lcbb %r4,0(%r5,%r3),6 + jo .Llt16_2 /* Jump away if vr is not fully loaded. */ + /* Both vrs are fully loaded. */ + aghi %r5,16 + 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 %r1,0(%r5,%r2),6 + jo .Llt16_1 + lcbb %r4,0(%r5,%r3),6 + jo .Llt16_2 + aghi %r5,16 + vfenezbs %v18,%v16,%v17 + jno .Lfound + + vlbb %v16,0(%r5,%r2),6 + vlbb %v17,0(%r5,%r3),6 + lcbb %r1,0(%r5,%r2),6 + jo .Llt16_1 + lcbb %r4,0(%r5,%r3),6 + jo .Llt16_2 + aghi %r5,16 + vfenezbs %v18,%v16,%v17 + jno .Lfound + + vlbb %v16,0(%r5,%r2),6 + vlbb %v17,0(%r5,%r3),6 + lcbb %r1,0(%r5,%r2),6 + jo .Llt16_1 + lcbb %r4,0(%r5,%r3),6 + jo .Llt16_2 + aghi %r5,16 + vfenezbs %v18,%v16,%v17 + jno .Lfound + j .Lloop + +.Llt16_1: + lcbb %r4,0(%r5,%r3),6 /* Get loaded byte count of s2. */ +.Llt16_2: + clr %r1,%r4 + locrh %r1,%r4 /* Get minimum of bytes loaded in s1/2. */ + algfr %r5,%r1 /* Add smallest loaded bytes to current_len. */ + vfenezbs %v18,%v16,%v17 /* Compare not equal with zero search. */ + vlgvb %r4,%v18,7 /* Get not equal index or 16 if all equal. */ + clrjl %r4,%r1,.Lfound /* Jump away if miscompare is within loaded + bytes. */ + j .Lloop + +.Lfound: + je .Lend_equal + lghi %r2,1 + lghi %r1,-1 + locgrl %r2,%r1 + br %r14 +.Lend_equal: + lghi %r2,0 + br %r14 +END(__strcmp_vx) + +# define strcmp __strcmp_c +# undef libc_hidden_builtin_def +# define libc_hidden_builtin_def(name) strong_alias(__strcmp_c, __GI_strcmp) +#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */ + +#include <strcmp.S> Index: glibc-2.22/sysdeps/s390/multiarch/strcmp.c =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/multiarch/strcmp.c @@ -0,0 +1,26 @@ +/* Multiple versions of strcmp. + 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 +s390_vx_libc_ifunc2 (__strcmp, strcmp) +#endif Index: glibc-2.22/sysdeps/s390/multiarch/wcscmp-c.c =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/multiarch/wcscmp-c.c @@ -0,0 +1,32 @@ +/* Default wcscmp 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 WCSCMP __wcscmp_c + +# include <wchar.h> +extern __typeof (wcscmp) __wcscmp_c; +# undef weak_alias +# define weak_alias(name, alias) +# ifdef SHARED +# undef libc_hidden_def +# define libc_hidden_def(name) \ + __hidden_ver1 (__wcscmp_c, __GI___wcscmp, __wcscmp_c); +# endif /* SHARED */ +# include <wcsmbs/wcscmp.c> +#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */ Index: glibc-2.22/sysdeps/s390/multiarch/wcscmp-vx.S =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/multiarch/wcscmp-vx.S @@ -0,0 +1,131 @@ +/* Vector optimized 32/64 bit S/390 version of wcscmp. + 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 wcscmp (const wchar_t *s1, const wchar_t *s2) + Compare two strings + + Register usage: + -r1=loaded byte count s1 + -r2=s1 + -r3=s2 + -r4=loaded byte coutn s2, tmp + -r5=current_len + -v16=part of s1 + -v17=part of s2 + -v18=index of unequal +*/ +ENTRY(__wcscmp_vx) + .machine "z13" + .machinemode "zarch_nohighgprs" + + 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 %r1,0(%r5,%r2),6 /* Get loaded byte count of s1. */ + jo .Llt16_1 /* Jump away if vr is not fully loaded. */ + lcbb %r4,0(%r5,%r3),6 + jo .Llt16_2 /* Jump away if vr is not fully loaded. */ + /* Both vrs are fully loaded. */ + aghi %r5,16 + vfenezfs %v18,%v16,%v17 /* Compare not equal with zero search. */ + jno .Lfound + + vlbb %v16,0(%r5,%r2),6 + vlbb %v17,0(%r5,%r3),6 + lcbb %r1,0(%r5,%r2),6 + jo .Llt16_1 + lcbb %r4,0(%r5,%r3),6 + jo .Llt16_2 + aghi %r5,16 + vfenezfs %v18,%v16,%v17 + jno .Lfound + + vlbb %v16,0(%r5,%r2),6 + vlbb %v17,0(%r5,%r3),6 + lcbb %r1,0(%r5,%r2),6 + jo .Llt16_1 + lcbb %r4,0(%r5,%r3),6 + jo .Llt16_2 + aghi %r5,16 + vfenezfs %v18,%v16,%v17 + jno .Lfound + + vlbb %v16,0(%r5,%r2),6 + vlbb %v17,0(%r5,%r3),6 + lcbb %r1,0(%r5,%r2),6 + jo .Llt16_1 + lcbb %r4,0(%r5,%r3),6 + jo .Llt16_2 + aghi %r5,16 + vfenezfs %v18,%v16,%v17 + jno .Lfound + 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. */ + vlef %v17,0(%r5,%r3),0 + lghi %r1,4 /* Loaded byte count is 4. */ + j .Llt_cmp /* Proceed with comparision. */ + +.Llt16_1: + lcbb %r4,0(%r5,%r3),6 /* Get loaded byte count of s2. */ +.Llt16_2: + clr %r1,%r4 + locrh %r1,%r4 /* Get minimum of bytes loaded in s1/2. */ + nill %r1,65532 /* Align bytes loaded to full characters. */ + jz .Lcmp_one_char /* Jump away if no full char is available. */ +.Llt_cmp: + algfr %r5,%r1 /* Add smallest loaded bytes to current_len. */ + vfenezfs %v18,%v16,%v17 /* Compare not equal with zero search. */ + vlgvb %r4,%v18,7 /* Get not equal index or 16 if all equal. */ + clrjl %r4,%r1,.Lfound /* Jump away if miscompare is within loaded + bytes. */ + j .Lloop + +.Lfound: + /* 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, */ + srl %r4,2 /* Convert it to character-index. */ + vlgvf %r3,%v16,0(%r4) /* Load character-values. */ + vlgvf %r4,%v17,0(%r4) + cr %r3,%r4 + je .Lend_equal + lghi %r2,1 + lghi %r1,-1 + locgrl %r2,%r1 + br %r14 +.Lend_equal: + lghi %r2,0 + br %r14 +END(__wcscmp_vx) +#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */ Index: glibc-2.22/sysdeps/s390/multiarch/wcscmp.c =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/multiarch/wcscmp.c @@ -0,0 +1,28 @@ +/* Multiple versions of wcscmp. + 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 (__wcscmp) +weak_alias (__wcscmp, wcscmp) + +#else +# include <wcsmbs/wcscmp.c> +#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */ Index: glibc-2.22/sysdeps/s390/s390-32/multiarch/strcmp.c =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/s390-32/multiarch/strcmp.c @@ -0,0 +1,21 @@ +/* Multiple versions of strcmp. + 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]/strcmp.S will be used. */ +#include <sysdeps/s390/multiarch/strcmp.c> Index: glibc-2.22/sysdeps/s390/s390-64/multiarch/strcmp.c =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/s390-64/multiarch/strcmp.c @@ -0,0 +1,21 @@ +/* Multiple versions of strcmp. + 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]/strcmp.S will be used. */ +#include <sysdeps/s390/multiarch/strcmp.c>
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