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glibc.8240
0020-S390-Optimize-strchr-and-wcschr.patch
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File 0020-S390-Optimize-strchr-and-wcschr.patch of Package glibc.8240
2015-08-26 Stefan Liebler <stli@linux.vnet.ibm.com> * sysdeps/s390/multiarch/strchr-c.c: New File. * sysdeps/s390/multiarch/strchr-vx.S: Likewise. * sysdeps/s390/multiarch/strchr.c: Likewise. * sysdeps/s390/multiarch/wcschr-c.c: Likewise. * sysdeps/s390/multiarch/wcschr-vx.S: Likewise. * sysdeps/s390/multiarch/wcschr.c: Likewise. * sysdeps/s390/multiarch/Makefile (sysdep_routines): Add strchr and wcschr functions. * sysdeps/s390/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Add ifunc test for strchr, wcschr. * string/strchr.c (STRCHR): Define and use macro. * benchtests/bench-wcschr.c: New File. * benchtests/Makefile (wcsmbs-bench): Add wcschr. Index: glibc-2.22/benchtests/Makefile =================================================================== --- glibc-2.22.orig/benchtests/Makefile +++ glibc-2.22/benchtests/Makefile @@ -37,7 +37,7 @@ string-bench := bcopy bzero memccpy memc strspn strstr strcpy_chk stpcpy_chk memrchr strsep strtok \ strcoll wcsmbs-bench := wcslen wcsnlen wcscpy wcpcpy wcsncpy wcpncpy wcscat wcsncat \ - wcscmp wcsncmp + wcscmp wcsncmp wcschr string-bench-all := $(string-bench) ${wcsmbs-bench} # We have to generate locales Index: glibc-2.22/benchtests/bench-wcschr.c =================================================================== --- /dev/null +++ glibc-2.22/benchtests/bench-wcschr.c @@ -0,0 +1,20 @@ +/* Measure wcschr 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-strchr.c" Index: glibc-2.22/string/strchr.c =================================================================== --- glibc-2.22.orig/string/strchr.c +++ glibc-2.22/string/strchr.c @@ -25,9 +25,13 @@ #undef strchr +#ifndef STRCHR +# define STRCHR strchr +#endif + /* Find the first occurrence of C in S. */ char * -strchr (const char *s, int c_in) +STRCHR (const char *s, int c_in) { const unsigned char *char_ptr; const unsigned long int *longword_ptr; @@ -180,7 +184,7 @@ strchr (const char *s, int c_in) } #ifdef weak_alias -#undef index +# undef index weak_alias (strchr, index) #endif libc_hidden_builtin_def (strchr) Index: glibc-2.22/sysdeps/s390/multiarch/Makefile =================================================================== --- glibc-2.22.orig/sysdeps/s390/multiarch/Makefile +++ glibc-2.22/sysdeps/s390/multiarch/Makefile @@ -8,7 +8,8 @@ sysdep_routines += strlen strlen-vx strl strcat strcat-vx strcat-c \ strncat strncat-vx strncat-c \ strcmp strcmp-vx \ - strncmp strncmp-vx strncmp-c + strncmp strncmp-vx strncmp-c \ + strchr strchr-vx strchr-c endif ifeq ($(subdir),wcsmbs) @@ -21,5 +22,6 @@ sysdep_routines += wcslen wcslen-vx wcsl wcscat wcscat-vx wcscat-c \ wcsncat wcsncat-vx wcsncat-c \ wcscmp wcscmp-vx wcscmp-c \ - wcsncmp wcsncmp-vx wcsncmp-c + wcsncmp wcsncmp-vx wcsncmp-c \ + wcschr wcschr-vx wcschr-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 @@ -109,6 +109,9 @@ __libc_ifunc_impl_list (const char *name IFUNC_VX_IMPL (strncmp); IFUNC_VX_IMPL (wcsncmp); + IFUNC_VX_IMPL (strchr); + IFUNC_VX_IMPL (wcschr); + #endif /* HAVE_S390_VX_ASM_SUPPORT */ return i; Index: glibc-2.22/sysdeps/s390/multiarch/strchr-c.c =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/multiarch/strchr-c.c @@ -0,0 +1,29 @@ +/* Default strchr 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 STRCHR __strchr_c +# undef weak_alias +# ifdef SHARED +# undef libc_hidden_builtin_def +# define libc_hidden_builtin_def(name) \ + __hidden_ver1 (__strchr_c, __GI_strchr, __strchr_c); +# endif /* SHARED */ + +# include <string/strchr.c> +#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */ Index: glibc-2.22/sysdeps/s390/multiarch/strchr-vx.S =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/multiarch/strchr-vx.S @@ -0,0 +1,100 @@ +/* Vector optimized 32/64 bit S/390 version of strchr. + 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 *strchr (const char *s, int c) + Locate character in string. + + Register usage: + -r1=tmp + -r2=s + -r3=c + -r4=tmp + -r5=current_len + -v16=part of s + -v17=index of unequal + -v18=replicated c +*/ +ENTRY(__strchr_vx) + .machine "z13" + .machinemode "zarch_nohighgprs" + + 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. */ + + lghi %r5,0 /* current_len = 0. */ + + vlvgb %v18,%r3,0 /* Generate vector which elements are all c. + If c > 255, c will be truncated. */ + vrepb %v18,%v18,0 + + vfeezbs %v16,%v16,%v18 /* Find element equal with zero search. */ + vlgvb %r4,%v16,7 /* Load byte index of character or zero. */ + clrjl %r4,%r1,.Lfound /* Return if c/zero is in loaded bytes. */ + + /* 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. */ + + /* Find c/zero in 16 byte aligned loop */ +.Lloop: + vl %v16,0(%r5,%r2) /* Load s. */ + vfeezbs %v16,%v16,%v18 /* Find element equal with zero search. */ + jno .Lfound /* Found c/zero (cc=0|1|2). */ + vl %v16,16(%r5,%r2) + vfeezbs %v16,%v16,%v18 + jno .Lfound16 + vl %v16,32(%r5,%r2) + vfeezbs %v16,%v16,%v18 + jno .Lfound32 + vl %v16,48(%r5,%r2) + vfeezbs %v16,%v16,%v18 + jno .Lfound48 + + aghi %r5,64 + j .Lloop /* No character and no zero -> loop. */ + +.Lfound48: + la %r5,16(%r5) /* Use la since aghi would clobber cc. */ +.Lfound32: + la %r5,16(%r5) +.Lfound16: + la %r5,16(%r5) +.Lfound: + je .Lzero /* Found zero, but no c before that zero. */ + +.Lcharacter: + vlgvb %r4,%v16,7 /* Load byte index of character. */ + algr %r5,%r4 + la %r2,0(%r5,%r2) /* Return pointer to character. */ + br %r14 + +.Lzero: + llgcr %r3,%r3 /* char c_char = (char) c. */ + clije %r3,0,.Lcharacter /* Found zero and c is zero. */ + lghi %r2,0 /* Return null if character not found. */ + br %r14 +END(__strchr_vx) +#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */ Index: glibc-2.22/sysdeps/s390/multiarch/strchr.c =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/multiarch/strchr.c @@ -0,0 +1,28 @@ +/* Multiple versions of strchr. + 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 (__strchr, strchr) +weak_alias (strchr, index) + +#else +# include <string/strchr.c> +#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */ Index: glibc-2.22/sysdeps/s390/multiarch/wcschr-c.c =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/multiarch/wcschr-c.c @@ -0,0 +1,37 @@ +/* Default wcschr 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 WCSCHR __wcschr_c + +# include <wchar.h> +extern __typeof (__wcschr) __wcschr_c; +# undef weak_alias +# define weak_alias(name, alias) +# ifdef SHARED +# undef libc_hidden_def +# define libc_hidden_def(name) \ + __hidden_ver1 (__wcschr_c, __GI_wcschr, __wcschr_c); \ + strong_alias (__wcschr_c, __wcschr_c_1); \ + __hidden_ver1 (__wcschr_c_1, __GI___wcschr, __wcschr_c_1); +# undef libc_hidden_weak +# define libc_hidden_weak(name) +# endif /* SHARED */ + +# include <wcsmbs/wcschr.c> +#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */ Index: glibc-2.22/sysdeps/s390/multiarch/wcschr-vx.S =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/multiarch/wcschr-vx.S @@ -0,0 +1,103 @@ +/* Vector optimized 32/64 bit S/390 version of wcschr. + 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 *wcschr (const wchar_t *s, wchar_t c) + Locate character in string. + + Register usage: + -r1=tmp + -r2=s + -r3=c + -r4=tmp + -r5=current_len + -v16=part of s + -v17=index of unequal + -v18=replicated c +*/ +ENTRY(__wcschr_vx) + .machine "z13" + .machinemode "zarch_nohighgprs" + + 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. */ + + tmll %r2,3 /* Test if s is 4-byte aligned? */ + jne .Lfallback /* And use common-code variant if not. */ + + lghi %r5,0 /* current_len = 0. */ + + vlvgf %v18,%r3,0 /* Generate vector which elements are all c. */ + vrepf %v18,%v18,0 + + vfeezfs %v16,%v16,%v18 /* Find element equal with zero search. */ + vlgvb %r4,%v16,7 /* Load byte index of character or zero. */ + clrjl %r4,%r1,.Lfound /* Return if c/zero is in loaded bytes. */ + + /* 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. */ + + /* Find c/zero in 16byte aligned loop */ +.Lloop: + vl %v16,0(%r5,%r2) /* Load s. */ + vfeezfs %v16,%v16,%v18 /* Find element equal with zero search. */ + jno .Lfound /* Found c/zero (cc=0|1|2). */ + vl %v16,16(%r5,%r2) + vfeezfs %v16,%v16,%v18 + jno .Lfound16 + vl %v16,32(%r5,%r2) + vfeezfs %v16,%v16,%v18 + jno .Lfound32 + vl %v16,48(%r5,%r2) + vfeezfs %v16,%v16,%v18 + jno .Lfound48 + + aghi %r5,64 + j .Lloop /* No character and no zero -> loop. */ + +.Lfound48: + la %r5,16(%r5) /* Use la since aghi would clobber cc. */ +.Lfound32: + la %r5,16(%r5) +.Lfound16: + la %r5,16(%r5) +.Lfound: + je .Lzero /* Found zero, but no c before that zero. */ + +.Lcharacter: + vlgvb %r4,%v16,7 /* Load byte index of character. */ + algr %r5,%r4 + la %r2,0(%r5,%r2) /* Return pointer to character. */ + br %r14 + +.Lzero: + clije %r3,0,.Lcharacter /* Found zero and c is zero. */ + lghi %r2,0 /* Return null if character not found. */ + br %r14 +.Lfallback: + jg __wcschr_c +END(__wcschr_vx) +#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */ Index: glibc-2.22/sysdeps/s390/multiarch/wcschr.c =================================================================== --- /dev/null +++ glibc-2.22/sysdeps/s390/multiarch/wcschr.c @@ -0,0 +1,29 @@ +/* Multiple versions of wcschr. + 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 (__wcschr) +weak_alias (__wcschr, wcschr) +libc_hidden_weak (wcschr) + +#else +# include <wcsmbs/wcschr.c> +#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)) */
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