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500 lines
17 KiB
500 lines
17 KiB
From 0b3ff29b298c488ab995d4224da2cc36fb56ddce Mon Sep 17 00:00:00 2001 |
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From: Stefan Liebler <stli@linux.vnet.ibm.com> |
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Date: Thu, 8 Oct 2015 11:25:00 +0200 |
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Subject: [PATCH 20/30] S390: Optimize strchr and wcschr. |
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upstream-commit-id: cf150d45a97c6bb8410d6d3acf6e1560e8fe96cc |
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https://www.sourceware.org/ml/libc-alpha/2015-07/msg00094.html |
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This patch provides optimized versions of strchr and wcschr with the z13 |
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vector instructions. |
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ChangeLog: |
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* sysdeps/s390/multiarch/strchr-c.c: New File. |
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* sysdeps/s390/multiarch/strchr-vx.S: Likewise. |
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* sysdeps/s390/multiarch/strchr.c: Likewise. |
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* sysdeps/s390/multiarch/wcschr-c.c: Likewise. |
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* sysdeps/s390/multiarch/wcschr-vx.S: Likewise. |
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* sysdeps/s390/multiarch/wcschr.c: Likewise. |
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* sysdeps/s390/multiarch/Makefile (sysdep_routines): Add strchr and |
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wcschr functions. |
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* sysdeps/s390/multiarch/ifunc-impl-list.c |
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(__libc_ifunc_impl_list): Add ifunc test for strchr, wcschr. |
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* string/strchr.c (STRCHR): Define and use macro. |
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* benchtests/bench-wcschr.c: New File. |
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* benchtests/Makefile (wcsmbs-bench): Add wcschr. |
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--- |
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benchtests/Makefile | 2 +- |
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benchtests/bench-wcschr.c | 20 ++++++ |
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string/strchr.c | 8 ++- |
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sysdeps/s390/multiarch/Makefile | 6 +- |
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sysdeps/s390/multiarch/ifunc-impl-list.c | 3 + |
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sysdeps/s390/multiarch/strchr-c.c | 29 +++++++++ |
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sysdeps/s390/multiarch/strchr-vx.S | 100 ++++++++++++++++++++++++++++++ |
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sysdeps/s390/multiarch/strchr.c | 28 +++++++++ |
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sysdeps/s390/multiarch/wcschr-c.c | 31 ++++++++++ |
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sysdeps/s390/multiarch/wcschr-vx.S | 103 +++++++++++++++++++++++++++++++ |
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sysdeps/s390/multiarch/wcschr.c | 27 ++++++++ |
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11 files changed, 351 insertions(+), 6 deletions(-) |
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create mode 100644 benchtests/bench-wcschr.c |
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create mode 100644 sysdeps/s390/multiarch/strchr-c.c |
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create mode 100644 sysdeps/s390/multiarch/strchr-vx.S |
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create mode 100644 sysdeps/s390/multiarch/strchr.c |
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create mode 100644 sysdeps/s390/multiarch/wcschr-c.c |
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create mode 100644 sysdeps/s390/multiarch/wcschr-vx.S |
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create mode 100644 sysdeps/s390/multiarch/wcschr.c |
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diff --git a/benchtests/Makefile b/benchtests/Makefile |
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index f6342da..bcb0288 100644 |
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--- a/benchtests/Makefile |
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+++ b/benchtests/Makefile |
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@@ -39,7 +39,7 @@ string-bench := bcopy bzero memccpy memchr memcmp memcpy memmem memmove \ |
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strncasecmp strncat strncmp strncpy strnlen strpbrk strrchr \ |
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strspn strstr strcpy_chk stpcpy_chk memrchr strsep strtok |
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wcsmbs-bench := wcslen wcsnlen wcscpy wcpcpy wcsncpy wcpncpy wcscat wcsncat \ |
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- wcsncmp wcsncmp |
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+ wcsncmp wcsncmp wcschr |
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string-bench-all := $(string-bench) ${wcsmbs-bench} |
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|
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stdlib-bench := strtod |
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diff --git a/benchtests/bench-wcschr.c b/benchtests/bench-wcschr.c |
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new file mode 100644 |
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index 0000000..4287724 |
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--- /dev/null |
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+++ b/benchtests/bench-wcschr.c |
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@@ -0,0 +1,20 @@ |
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+/* Measure wcschr functions. |
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+ Copyright (C) 2015 Free Software Foundation, Inc. |
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+ This file is part of the GNU C Library. |
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+ |
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+ The GNU C Library is free software; you can redistribute it and/or |
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+ modify it under the terms of the GNU Lesser General Public |
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+ License as published by the Free Software Foundation; either |
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+ version 2.1 of the License, or (at your option) any later version. |
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+ |
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+ The GNU C Library is distributed in the hope that it will be useful, |
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of |
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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+ Lesser General Public License for more details. |
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+ |
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+ You should have received a copy of the GNU Lesser General Public |
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+ License along with the GNU C Library; if not, see |
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+ <http://www.gnu.org/licenses/>. */ |
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+ |
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+#define WIDE 1 |
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+#include "bench-strchr.c" |
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diff --git a/string/strchr.c b/string/strchr.c |
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index 9d18b7e..69a9cd9 100644 |
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--- a/string/strchr.c |
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+++ b/string/strchr.c |
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@@ -27,11 +27,13 @@ |
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#undef strchr |
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+#ifndef STRCHR |
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+# define STRCHR strchr |
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+#endif |
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+ |
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/* Find the first occurrence of C in S. */ |
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char * |
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-strchr (s, c_in) |
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- const char *s; |
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- int c_in; |
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+STRCHR (const char *s, int c_in) |
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{ |
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const unsigned char *char_ptr; |
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const unsigned long int *longword_ptr; |
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diff --git a/sysdeps/s390/multiarch/Makefile b/sysdeps/s390/multiarch/Makefile |
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index d77bee5..1a3673b 100644 |
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--- a/sysdeps/s390/multiarch/Makefile |
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+++ b/sysdeps/s390/multiarch/Makefile |
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@@ -8,7 +8,8 @@ sysdep_routines += strlen strlen-vx strlen-c \ |
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strcat strcat-vx strcat-c \ |
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strncat strncat-vx strncat-c \ |
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strcmp strcmp-vx \ |
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- strncmp strncmp-vx strncmp-c |
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+ strncmp strncmp-vx strncmp-c \ |
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+ strchr strchr-vx strchr-c |
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endif |
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ifeq ($(subdir),wcsmbs) |
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@@ -21,5 +22,6 @@ sysdep_routines += wcslen wcslen-vx wcslen-c \ |
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wcscat wcscat-vx wcscat-c \ |
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wcsncat wcsncat-vx wcsncat-c \ |
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wcscmp wcscmp-vx wcscmp-c \ |
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- wcsncmp wcsncmp-vx wcsncmp-c |
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+ wcsncmp wcsncmp-vx wcsncmp-c \ |
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+ wcschr wcschr-vx wcschr-c |
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endif |
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diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c |
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index 5bfc493..b0782ff 100644 |
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--- a/sysdeps/s390/multiarch/ifunc-impl-list.c |
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+++ b/sysdeps/s390/multiarch/ifunc-impl-list.c |
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@@ -109,6 +109,9 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array, |
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IFUNC_VX_IMPL (strncmp); |
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IFUNC_VX_IMPL (wcsncmp); |
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+ IFUNC_VX_IMPL (strchr); |
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+ IFUNC_VX_IMPL (wcschr); |
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+ |
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#endif /* HAVE_S390_VX_ASM_SUPPORT */ |
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return i; |
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diff --git a/sysdeps/s390/multiarch/strchr-c.c b/sysdeps/s390/multiarch/strchr-c.c |
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new file mode 100644 |
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index 0000000..4384e6b |
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--- /dev/null |
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+++ b/sysdeps/s390/multiarch/strchr-c.c |
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@@ -0,0 +1,29 @@ |
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+/* Default strchr implementation for S/390. |
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+ Copyright (C) 2015 Free Software Foundation, Inc. |
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+ This file is part of the GNU C Library. |
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+ |
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+ The GNU C Library is free software; you can redistribute it and/or |
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+ modify it under the terms of the GNU Lesser General Public |
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+ License as published by the Free Software Foundation; either |
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+ version 2.1 of the License, or (at your option) any later version. |
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+ |
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+ The GNU C Library is distributed in the hope that it will be useful, |
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of |
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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+ Lesser General Public License for more details. |
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+ |
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+ You should have received a copy of the GNU Lesser General Public |
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+ License along with the GNU C Library; if not, see |
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+ <http://www.gnu.org/licenses/>. */ |
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+ |
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+#if defined HAVE_S390_VX_ASM_SUPPORT && !defined NOT_IN_libc |
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+# define STRCHR __strchr_c |
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+# undef weak_alias |
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+# ifdef SHARED |
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+# undef libc_hidden_builtin_def |
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+# define libc_hidden_builtin_def(name) \ |
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+ __hidden_ver1 (__strchr_c, __GI_strchr, __strchr_c); |
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+# endif /* SHARED */ |
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+ |
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+# include <string/strchr.c> |
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+#endif /* HAVE_S390_VX_ASM_SUPPORT && !defined NOT_IN_libc */ |
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diff --git a/sysdeps/s390/multiarch/strchr-vx.S b/sysdeps/s390/multiarch/strchr-vx.S |
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new file mode 100644 |
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index 0000000..26180df |
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--- /dev/null |
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+++ b/sysdeps/s390/multiarch/strchr-vx.S |
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@@ -0,0 +1,100 @@ |
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+/* Vector optimized 32/64 bit S/390 version of strchr. |
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+ Copyright (C) 2015 Free Software Foundation, Inc. |
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+ This file is part of the GNU C Library. |
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+ |
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+ The GNU C Library is free software; you can redistribute it and/or |
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+ modify it under the terms of the GNU Lesser General Public |
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+ License as published by the Free Software Foundation; either |
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+ version 2.1 of the License, or (at your option) any later version. |
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+ |
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+ The GNU C Library is distributed in the hope that it will be useful, |
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of |
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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+ Lesser General Public License for more details. |
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+ |
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+ You should have received a copy of the GNU Lesser General Public |
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+ License along with the GNU C Library; if not, see |
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+ <http://www.gnu.org/licenses/>. */ |
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+ |
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+#if defined HAVE_S390_VX_ASM_SUPPORT && !defined NOT_IN_libc |
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+ |
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+# include "sysdep.h" |
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+# include "asm-syntax.h" |
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+ |
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+ .text |
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+ |
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+/* char *strchr (const char *s, int c) |
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+ Locate character in string. |
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+ |
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+ Register usage: |
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+ -r1=tmp |
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+ -r2=s |
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+ -r3=c |
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+ -r4=tmp |
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+ -r5=current_len |
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+ -v16=part of s |
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+ -v17=index of unequal |
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+ -v18=replicated c |
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+*/ |
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+ENTRY(__strchr_vx) |
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+ .machine "z13" |
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+ .machinemode "zarch_nohighgprs" |
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+ |
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+ vlbb %v16,0(%r2),6 /* Load s until next 4k-byte boundary. */ |
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+ lcbb %r1,0(%r2),6 /* Get bytes to 4k-byte boundary or 16. */ |
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+ |
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+ lghi %r5,0 /* current_len = 0. */ |
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+ |
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+ vlvgb %v18,%r3,0 /* Generate vector which elements are all c. |
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+ If c > 255, c will be truncated. */ |
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+ vrepb %v18,%v18,0 |
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+ |
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+ vfeezbs %v16,%v16,%v18 /* Find element equal with zero search. */ |
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+ vlgvb %r4,%v16,7 /* Load byte index of character or zero. */ |
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+ clrjl %r4,%r1,.Lfound /* Return if c/zero is in loaded bytes. */ |
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+ |
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+ /* Align s to 16 byte. */ |
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+ risbgn %r4,%r2,60,128+63,0 /* %r3 = bits 60-63 of %r2 'and' 15. */ |
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+ lghi %r5,16 /* current_len = 16. */ |
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+ slr %r5,%r4 /* Compute bytes to 16bytes boundary. */ |
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+ |
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+ /* Find c/zero in 16 byte aligned loop */ |
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+.Lloop: |
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+ vl %v16,0(%r5,%r2) /* Load s. */ |
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+ vfeezbs %v16,%v16,%v18 /* Find element equal with zero search. */ |
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+ jno .Lfound /* Found c/zero (cc=0|1|2). */ |
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+ vl %v16,16(%r5,%r2) |
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+ vfeezbs %v16,%v16,%v18 |
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+ jno .Lfound16 |
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+ vl %v16,32(%r5,%r2) |
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+ vfeezbs %v16,%v16,%v18 |
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+ jno .Lfound32 |
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+ vl %v16,48(%r5,%r2) |
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+ vfeezbs %v16,%v16,%v18 |
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+ jno .Lfound48 |
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+ |
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+ aghi %r5,64 |
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+ j .Lloop /* No character and no zero -> loop. */ |
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+ |
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+.Lfound48: |
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+ la %r5,16(%r5) /* Use la since aghi would clobber cc. */ |
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+.Lfound32: |
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+ la %r5,16(%r5) |
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+.Lfound16: |
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+ la %r5,16(%r5) |
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+.Lfound: |
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+ je .Lzero /* Found zero, but no c before that zero. */ |
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+ |
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+.Lcharacter: |
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+ vlgvb %r4,%v16,7 /* Load byte index of character. */ |
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+ algr %r5,%r4 |
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+ la %r2,0(%r5,%r2) /* Return pointer to character. */ |
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+ br %r14 |
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+ |
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+.Lzero: |
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+ llgcr %r3,%r3 /* char c_char = (char) c. */ |
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+ clije %r3,0,.Lcharacter /* Found zero and c is zero. */ |
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+ lghi %r2,0 /* Return null if character not found. */ |
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+ br %r14 |
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+END(__strchr_vx) |
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+#endif /* HAVE_S390_VX_ASM_SUPPORT && !defined NOT_IN_libc */ |
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diff --git a/sysdeps/s390/multiarch/strchr.c b/sysdeps/s390/multiarch/strchr.c |
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new file mode 100644 |
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index 0000000..e2a310f |
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--- /dev/null |
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+++ b/sysdeps/s390/multiarch/strchr.c |
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@@ -0,0 +1,28 @@ |
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+/* Multiple versions of strchr. |
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+ Copyright (C) 2015 Free Software Foundation, Inc. |
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+ This file is part of the GNU C Library. |
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+ |
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+ The GNU C Library is free software; you can redistribute it and/or |
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+ modify it under the terms of the GNU Lesser General Public |
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+ License as published by the Free Software Foundation; either |
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+ version 2.1 of the License, or (at your option) any later version. |
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+ |
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+ The GNU C Library is distributed in the hope that it will be useful, |
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of |
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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+ Lesser General Public License for more details. |
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+ |
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+ You should have received a copy of the GNU Lesser General Public |
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+ License along with the GNU C Library; if not, see |
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+ <http://www.gnu.org/licenses/>. */ |
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+ |
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+#if defined HAVE_S390_VX_ASM_SUPPORT && !defined NOT_IN_libc |
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+# include <string.h> |
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+# include <ifunc-resolve.h> |
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+ |
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+s390_vx_libc_ifunc2 (__strchr, strchr) |
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+weak_alias (strchr, index) |
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+ |
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+#else |
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+# include <string/strchr.c> |
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+#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && !defined NOT_IN_libc) */ |
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diff --git a/sysdeps/s390/multiarch/wcschr-c.c b/sysdeps/s390/multiarch/wcschr-c.c |
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new file mode 100644 |
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index 0000000..ad7415e |
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--- /dev/null |
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+++ b/sysdeps/s390/multiarch/wcschr-c.c |
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@@ -0,0 +1,31 @@ |
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+/* Default wcschr implementation for S/390. |
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+ Copyright (C) 2015 Free Software Foundation, Inc. |
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+ This file is part of the GNU C Library. |
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+ |
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+ The GNU C Library is free software; you can redistribute it and/or |
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+ modify it under the terms of the GNU Lesser General Public |
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+ License as published by the Free Software Foundation; either |
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+ version 2.1 of the License, or (at your option) any later version. |
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+ |
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+ 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. |
|
+ |
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+ You should have received a copy of the GNU Lesser General Public |
|
+ License along with the GNU C Library; if not, see |
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+ <http://www.gnu.org/licenses/>. */ |
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+ |
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+#if defined HAVE_S390_VX_ASM_SUPPORT && !defined NOT_IN_libc |
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+# define WCSCHR __wcschr_c |
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+ |
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+# include <wchar.h> |
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+extern __typeof (wcschr) __wcschr_c; |
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+# ifdef SHARED |
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+# undef libc_hidden_def |
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+# define libc_hidden_def(name) \ |
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+ __hidden_ver1 (__wcschr_c, __GI_wcschr, __wcschr_c); |
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+# endif /* SHARED */ |
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+ |
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+# include <wcsmbs/wcschr.c> |
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+#endif /* HAVE_S390_VX_ASM_SUPPORT && !defined NOT_IN_libc */ |
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diff --git a/sysdeps/s390/multiarch/wcschr-vx.S b/sysdeps/s390/multiarch/wcschr-vx.S |
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new file mode 100644 |
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index 0000000..c1b3f6b |
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--- /dev/null |
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+++ b/sysdeps/s390/multiarch/wcschr-vx.S |
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@@ -0,0 +1,103 @@ |
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+/* Vector optimized 32/64 bit S/390 version of wcschr. |
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+ Copyright (C) 2015 Free Software Foundation, Inc. |
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+ This file is part of the GNU C Library. |
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+ |
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+ 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. |
|
+ |
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+ 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. |
|
+ |
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+ 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/>. */ |
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+ |
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+#if defined HAVE_S390_VX_ASM_SUPPORT && !defined NOT_IN_libc |
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+ |
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+# include "sysdep.h" |
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+# include "asm-syntax.h" |
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+ |
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+ .text |
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+ |
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+/* wchar_t *wcschr (const wchar_t *s, wchar_t c) |
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+ Locate character in string. |
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+ |
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+ Register usage: |
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+ -r1=tmp |
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+ -r2=s |
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+ -r3=c |
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+ -r4=tmp |
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+ -r5=current_len |
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+ -v16=part of s |
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+ -v17=index of unequal |
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+ -v18=replicated c |
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+*/ |
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+ENTRY(__wcschr_vx) |
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+ .machine "z13" |
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+ .machinemode "zarch_nohighgprs" |
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+ |
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+ vlbb %v16,0(%r2),6 /* Load s until next 4k-byte boundary. */ |
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+ lcbb %r1,0(%r2),6 /* Get bytes to 4k-byte boundary or 16. */ |
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+ |
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+ tmll %r2,3 /* Test if s is 4-byte aligned? */ |
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+ jne .Lfallback /* And use common-code variant if not. */ |
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+ |
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+ lghi %r5,0 /* current_len = 0. */ |
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+ |
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+ vlvgf %v18,%r3,0 /* Generate vector which elements are all c. */ |
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+ vrepf %v18,%v18,0 |
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+ |
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+ vfeezfs %v16,%v16,%v18 /* Find element equal with zero search. */ |
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+ vlgvb %r4,%v16,7 /* Load byte index of character or zero. */ |
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+ clrjl %r4,%r1,.Lfound /* Return if c/zero is in loaded bytes. */ |
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+ |
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+ /* Align s to 16 byte. */ |
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+ risbgn %r4,%r2,60,128+63,0 /* %r3 = bits 60-63 of %r2 'and' 15. */ |
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+ lghi %r5,16 /* current_len = 16. */ |
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+ slr %r5,%r4 /* Compute bytes to 16bytes boundary. */ |
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+ |
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+ /* Find c/zero in 16byte aligned loop */ |
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+.Lloop: |
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+ vl %v16,0(%r5,%r2) /* Load s. */ |
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+ vfeezfs %v16,%v16,%v18 /* Find element equal with zero search. */ |
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+ jno .Lfound /* Found c/zero (cc=0|1|2). */ |
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+ vl %v16,16(%r5,%r2) |
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+ vfeezfs %v16,%v16,%v18 |
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+ jno .Lfound16 |
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+ vl %v16,32(%r5,%r2) |
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+ vfeezfs %v16,%v16,%v18 |
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+ jno .Lfound32 |
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+ vl %v16,48(%r5,%r2) |
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+ vfeezfs %v16,%v16,%v18 |
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+ jno .Lfound48 |
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+ |
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+ aghi %r5,64 |
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+ j .Lloop /* No character and no zero -> loop. */ |
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+ |
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+.Lfound48: |
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+ la %r5,16(%r5) /* Use la since aghi would clobber cc. */ |
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+.Lfound32: |
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+ la %r5,16(%r5) |
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+.Lfound16: |
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+ la %r5,16(%r5) |
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+.Lfound: |
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+ je .Lzero /* Found zero, but no c before that zero. */ |
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+ |
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+.Lcharacter: |
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+ vlgvb %r4,%v16,7 /* Load byte index of character. */ |
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+ algr %r5,%r4 |
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+ 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 && !defined NOT_IN_libc */ |
|
diff --git a/sysdeps/s390/multiarch/wcschr.c b/sysdeps/s390/multiarch/wcschr.c |
|
new file mode 100644 |
|
index 0000000..9c8c097 |
|
--- /dev/null |
|
+++ b/sysdeps/s390/multiarch/wcschr.c |
|
@@ -0,0 +1,27 @@ |
|
+/* 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 && !defined NOT_IN_libc |
|
+# include <wchar.h> |
|
+# include <ifunc-resolve.h> |
|
+ |
|
+s390_vx_libc_ifunc2 (__wcschr, wcschr) |
|
+ |
|
+#else |
|
+# include <wcsmbs/wcschr.c> |
|
+#endif /* !(defined HAVE_S390_VX_ASM_SUPPORT && !defined NOT_IN_libc) */ |
|
-- |
|
2.3.0 |
|
|
|
|