diff options
| -rw-r--r-- | ChangeLog | 16 | ||||
| -rw-r--r-- | config.h.in | 3 | ||||
| -rw-r--r-- | config.make.in | 2 | ||||
| -rwxr-xr-x | configure | 2 | ||||
| -rw-r--r-- | configure.in | 1 | ||||
| -rwxr-xr-x | sysdeps/i386/configure | 71 | ||||
| -rw-r--r-- | sysdeps/i386/configure.in | 11 | ||||
| -rw-r--r-- | sysdeps/x86_64/multiarch/Makefile | 6 | ||||
| -rw-r--r-- | sysdeps/x86_64/multiarch/strcspn-c.c | 331 | ||||
| -rw-r--r-- | sysdeps/x86_64/multiarch/strcspn.S | 82 | ||||
| -rw-r--r-- | sysdeps/x86_64/multiarch/strpbrk-c.c | 4 | ||||
| -rw-r--r-- | sysdeps/x86_64/multiarch/strpbrk.S | 3 | ||||
| -rw-r--r-- | sysdeps/x86_64/multiarch/strspn-c.c | 287 | ||||
| -rw-r--r-- | sysdeps/x86_64/multiarch/strspn.S | 63 |
14 files changed, 875 insertions, 7 deletions
@@ -1,3 +1,19 @@ +2009-07-02 H.J. Lu <hongjiu.lu@intel.com> + + * config.h.in (HAVE_SSE4_SUPPORT): New macro. + * config.make.in (config-cflags-sse4): New variable. + * configure.in: Substitute libc_cv_cc_sse4. + * sysdeps/i386/configure.in: Set libc_cv_cc_sse4 and + HAVE_SSE4_SUPPORT. + * sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add + strcspn-c, strpbrk-c, strspn-c for string if gcc supports SSE4. + * sysdeps/x86_64/multiarch/strcspn-c.c: New file. + * sysdeps/x86_64/multiarch/strcspn.S: New file. + * sysdeps/x86_64/multiarch/strpbrk-c.c: New file. + * sysdeps/x86_64/multiarch/strpbrk.S: New file. + * sysdeps/x86_64/multiarch/strspn-c.c: New file. + * sysdeps/x86_64/multiarch/strspn.S: New file. + 2009-06-30 H.J. Lu <hongjiu.lu@intel.com> * elf/Makefile (distribute): Remove tst-audit.sh. Add diff --git a/config.h.in b/config.h.in index 8dbc224a7d..4ddab7d775 100644 --- a/config.h.in +++ b/config.h.in @@ -129,6 +129,9 @@ /* Define if binutils support TLS handling. */ #undef HAVE_TLS_SUPPORT +/* Define if gcc supports SSE4. */ +#undef HAVE_SSE4_SUPPORT + /* Define if the compiler's exception support is based on libunwind. */ #undef HAVE_CC_WITH_LIBUNWIND diff --git a/config.make.in b/config.make.in index e48ea2658d..5fb5c8110c 100644 --- a/config.make.in +++ b/config.make.in @@ -34,6 +34,8 @@ config-sysdirs = @sysnames@ cflags-cpu = @libc_cv_cc_submachine@ asflags-cpu = @libc_cv_cc_submachine@ +config-cflags-sse4 = @libc_cv_cc_sse4@ + defines = @DEFINES@ sysincludes = @SYSINCLUDES@ c++-sysincludes = @CXX_SYSINCLUDES@ @@ -657,6 +657,7 @@ xcoff elf ldd_rewrite_script use_ldconfig +libc_cv_cc_sse4 libc_cv_cpp_asm_debuginfo libc_cv_forced_unwind libc_cv_rootsbindir @@ -8744,6 +8745,7 @@ fi + if test $elf = yes; then cat >>confdefs.h <<\_ACEOF #define HAVE_ELF 1 diff --git a/configure.in b/configure.in index 6a92bd876a..216cdc9d07 100644 --- a/configure.in +++ b/configure.in @@ -2259,6 +2259,7 @@ AC_SUBST(libc_cv_forced_unwind) dnl sysdeps/CPU/configure.in checks set this via arch-specific asm tests AC_SUBST(libc_cv_cpp_asm_debuginfo) +AC_SUBST(libc_cv_cc_sse4) AC_SUBST(use_ldconfig) AC_SUBST(ldd_rewrite_script) diff --git a/sysdeps/i386/configure b/sysdeps/i386/configure index d1d4dc15a7..cbc8cd9206 100755 --- a/sysdeps/i386/configure +++ b/sysdeps/i386/configure @@ -1,10 +1,42 @@ +as_nl=' +' +export as_nl +# Printing a long string crashes Solaris 7 /usr/bin/printf. +as_echo='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\' +as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo +as_echo=$as_echo$as_echo$as_echo$as_echo$as_echo$as_echo +if (test "X`printf %s $as_echo`" = "X$as_echo") 2>/dev/null; then + as_echo='printf %s\n' + as_echo_n='printf %s' +else + if test "X`(/usr/ucb/echo -n -n $as_echo) 2>/dev/null`" = "X-n $as_echo"; then + as_echo_body='eval /usr/ucb/echo -n "$1$as_nl"' + as_echo_n='/usr/ucb/echo -n' + else + as_echo_body='eval expr "X$1" : "X\\(.*\\)"' + as_echo_n_body='eval + arg=$1; + case $arg in + *"$as_nl"*) + expr "X$arg" : "X\\(.*\\)$as_nl"; + arg=`expr "X$arg" : ".*$as_nl\\(.*\\)"`;; + esac; + expr "X$arg" : "X\\(.*\\)" | tr -d "$as_nl" + ' + export as_echo_n_body + as_echo_n='sh -c $as_echo_n_body as_echo' + fi + export as_echo_body + as_echo='sh -c $as_echo_body as_echo' +fi + # This file is generated from configure.in by Autoconf. DO NOT EDIT! # Local configure fragment for sysdeps/i386. -echo "$as_me:$LINENO: checking if -g produces usable source locations for assembler-with-cpp" >&5 -echo $ECHO_N "checking if -g produces usable source locations for assembler-with-cpp... $ECHO_C" >&6 +{ $as_echo "$as_me:$LINENO: checking if -g produces usable source locations for assembler-with-cpp" >&5 +$as_echo_n "checking if -g produces usable source locations for assembler-with-cpp... " >&6; } if test "${libc_cv_cpp_asm_debuginfo+set}" = set; then - echo $ECHO_N "(cached) $ECHO_C" >&6 + $as_echo_n "(cached) " >&6 else cat > conftest.S <<EOF #include "confdefs.h" @@ -27,7 +59,7 @@ if { ac_try='${CC-cc} $CPPFLAGS $ASFLAGS -g -c conftest.S 1>&5' { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 (eval $ac_try) 2>&5 ac_status=$? - echo "$as_me:$LINENO: \$? = $ac_status" >&5 + $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); }; } && { ac_pattern='conftest\.S' { ac_try='readelf --debug-dump=line conftest.o | @@ -35,7 +67,7 @@ if { ac_try='${CC-cc} $CPPFLAGS $ASFLAGS -g -c conftest.S 1>&5' { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 (eval $ac_try) 2>&5 ac_status=$? - echo "$as_me:$LINENO: \$? = $ac_status" >&5 + $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5 (exit $ac_status); }; } }; then libc_cv_cpp_asm_debuginfo=yes @@ -44,11 +76,36 @@ else fi rm -f conftest* fi -echo "$as_me:$LINENO: result: $libc_cv_cpp_asm_debuginfo" >&5 -echo "${ECHO_T}$libc_cv_cpp_asm_debuginfo" >&6 +{ $as_echo "$as_me:$LINENO: result: $libc_cv_cpp_asm_debuginfo" >&5 +$as_echo "$libc_cv_cpp_asm_debuginfo" >&6; } if test $libc_cv_cpp_asm_debuginfo = yes; then cat >>confdefs.h <<\_ACEOF #define HAVE_CPP_ASM_DEBUGINFO 1 _ACEOF fi + +{ $as_echo "$as_me:$LINENO: checking for SSE4 support" >&5 +$as_echo_n "checking for SSE4 support... " >&6; } +if test "${libc_cv_cc_sse4+set}" = set; then + $as_echo_n "(cached) " >&6 +else + if { ac_try='${CC-cc} -msse4 -xc /dev/null -S -o /dev/null' + { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 + (eval $ac_try) 2>&5 + ac_status=$? + $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5 + (exit $ac_status); }; }; then + libc_cv_cc_sse4=yes +else + libc_cv_cc_sse4=no +fi +fi +{ $as_echo "$as_me:$LINENO: result: $libc_cv_cc_sse4" >&5 +$as_echo "$libc_cv_cc_sse4" >&6; } +if test $libc_cv_cc_sse4 = yes; then + cat >>confdefs.h <<\_ACEOF +#define HAVE_SSE4_SUPPORT 1 +_ACEOF + +fi diff --git a/sysdeps/i386/configure.in b/sysdeps/i386/configure.in index 028e1ae8e1..44f53a57a0 100644 --- a/sysdeps/i386/configure.in +++ b/sysdeps/i386/configure.in @@ -33,3 +33,14 @@ rm -f conftest*])AC_SUBST(libc_cv_cpp_asm_debuginfo) if test $libc_cv_cpp_asm_debuginfo = yes; then AC_DEFINE(HAVE_CPP_ASM_DEBUGINFO) fi + +dnl Check if -msse4 works. +AC_CACHE_CHECK(for SSE4 support, libc_cv_cc_sse4, [dnl +if AC_TRY_COMMAND([${CC-cc} -msse4 -xc /dev/null -S -o /dev/null]); then + libc_cv_cc_sse4=yes +else + libc_cv_cc_sse4=no +fi]) +if test $libc_cv_cc_sse4 = yes; then + AC_DEFINE(HAVE_SSE4_SUPPORT) +fi diff --git a/sysdeps/x86_64/multiarch/Makefile b/sysdeps/x86_64/multiarch/Makefile index 127592aa3a..71e85f0652 100644 --- a/sysdeps/x86_64/multiarch/Makefile +++ b/sysdeps/x86_64/multiarch/Makefile @@ -5,4 +5,10 @@ endif ifeq ($(subdir),string) sysdep_routines += stpncpy-c strncpy-c strncmp-c +ifeq (yes,$(config-cflags-sse4)) +sysdep_routines += strcspn-c strpbrk-c strspn-c +CFLAGS-strcspn-c.c += -msse4 +CFLAGS-strpbrk-c.c += -msse4 +CFLAGS-strspn-c.c += -msse4 +endif endif diff --git a/sysdeps/x86_64/multiarch/strcspn-c.c b/sysdeps/x86_64/multiarch/strcspn-c.c new file mode 100644 index 0000000000..6a8b87a866 --- /dev/null +++ b/sysdeps/x86_64/multiarch/strcspn-c.c @@ -0,0 +1,331 @@ +/* strcspn with SSE4.2 intrinsics + Copyright (C) 2009 Free Software Foundation, Inc. + Contributed by Intel Corporation. + 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <nmmintrin.h> +#include <string.h> + +/* We use 0x2: + _SIDD_SBYTE_OPS + | _SIDD_CMP_EQUAL_ANY + | _SIDD_POSITIVE_POLARITY + | _SIDD_LEAST_SIGNIFICANT + on pcmpistri to compare xmm/mem128 + + 0 1 2 3 4 5 6 7 8 9 A B C D E F + X X X X X X X X X X X X X X X X + + against xmm + + 0 1 2 3 4 5 6 7 8 9 A B C D E F + A A A A A A A A A A A A A A A A + + to find out if the first 16byte data element has any byte A and + the offset of the first byte. There are 3 cases: + + 1. The first 16byte data element has the byte A at the offset X. + 2. The first 16byte data element has EOS and doesn't have the byte A. + 3. The first 16byte data element is valid and doesn't have the byte A. + + Here is the table of ECX, CFlag, ZFlag and SFlag for 2 cases: + + 1 X 1 0/1 0 + 2 16 0 1 0 + 3 16 0 0 0 + + We exit from the loop for cases 1 and 2 with jbe which branches + when either CFlag or ZFlag is 1. If CFlag == 1, ECX has the offset + X for case 1. */ + +#ifndef STRCSPN_SSE2 +#define STRCSPN_SSE2 __strcspn_sse2 +#define STRCSPN_SSE42 __strcspn_sse42 +#endif + +extern +#ifdef USE_AS_STRPBRK +char * +#else +size_t +#endif +STRCSPN_SSE2 (const char *, const char *); + +#ifdef USE_AS_STRPBRK +char * +#else +size_t +#endif +__attribute__ ((section (".text.sse4.2"))) +STRCSPN_SSE42 (const char *s, const char *a) +{ + int offset; + const char *aligned; + __m128i mask, mask0, mask1; + __m128i value; + int index, length; + int cflag, zflag; + + if (*a == 0) +#ifdef USE_AS_STRPBRK + return NULL; +#else + return strlen (s); +#endif + + offset = (int) ((size_t) a & 15); + if (offset != 0) + { + /* Load masks. */ + aligned = (const char *) ((size_t) a & 0xfffffffffffffff0L); + mask0 = _mm_load_si128 ((__m128i *) aligned); + + switch (offset) + { + case 1: + mask = _mm_srli_si128 (mask0, 1); + break; + case 2: + mask = _mm_srli_si128 (mask0, 2); + break; + case 3: + mask = _mm_srli_si128 (mask0, 3); + break; + case 4: + mask = _mm_srli_si128 (mask0, 4); + break; + case 5: + mask = _mm_srli_si128 (mask0, 5); + break; + case 6: + mask = _mm_srli_si128 (mask0, 6); + break; + case 7: + mask = _mm_srli_si128 (mask0, 7); + break; + case 8: + mask = _mm_srli_si128 (mask0, 8); + break; + case 9: + mask = _mm_srli_si128 (mask0, 9); + break; + case 10: + mask = _mm_srli_si128 (mask0, 10); + break; + case 11: + mask = _mm_srli_si128 (mask0, 11); + break; + case 12: + mask = _mm_srli_si128 (mask0, 12); + break; + case 13: + mask = _mm_srli_si128 (mask0, 13); + break; + case 14: + mask = _mm_srli_si128 (mask0, 14); + break; + case 15: + mask = _mm_srli_si128 (mask0, 15); + break; + } + + /* Find where the NULL terminator is. */ + length = _mm_cmpistri (mask, mask, 0x3a); + if (length == 16 - offset) + { + /* There is no NULL terminator. */ + mask1 = _mm_load_si128 ((__m128i *) (aligned + 16)); + index = _mm_cmpistri (mask1, mask1, 0x3a); + length += index; + + /* Don't use SSE4.2 if the length of A > 16. */ + if (length > 16) + return STRCSPN_SSE2 (s, a); + + if (index != 0) + { + /* Combine mask0 and mask1. */ + switch (offset) + { + case 1: + mask = _mm_alignr_epi8 (mask1, mask0, 1); + break; + case 2: + mask = _mm_alignr_epi8 (mask1, mask0, 2); + break; + case 3: + mask = _mm_alignr_epi8 (mask1, mask0, 3); + break; + case 4: + mask = _mm_alignr_epi8 (mask1, mask0, 4); + break; + case 5: + mask = _mm_alignr_epi8 (mask1, mask0, 5); + break; + case 6: + mask = _mm_alignr_epi8 (mask1, mask0, 6); + break; + case 7: + mask = _mm_alignr_epi8 (mask1, mask0, 7); + break; + case 8: + mask = _mm_alignr_epi8 (mask1, mask0, 8); + break; + case 9: + mask = _mm_alignr_epi8 (mask1, mask0, 9); + break; + case 10: + mask = _mm_alignr_epi8 (mask1, mask0, 10); + break; + case 11: + mask = _mm_alignr_epi8 (mask1, mask0, 11); + break; + case 12: + mask = _mm_alignr_epi8 (mask1, mask0, 12); + break; + case 13: + mask = _mm_alignr_epi8 (mask1, mask0, 13); + break; + case 14: + mask = _mm_alignr_epi8 (mask1, mask0, 14); + break; + case 15: + mask = _mm_alignr_epi8 (mask1, mask0, 15); + break; + } + } + } + } + else + { + /* A is aligned. */ + mask = _mm_load_si128 ((__m128i *) a); + + /* Find where the NULL terminator is. */ + length = _mm_cmpistri (mask, mask, 0x3a); + if (length == 16) + { + /* There is no NULL terminator. Don't use SSE4.2 if the length + of A > 16. */ + if (a[16] != 0) + return STRCSPN_SSE2 (s, a); + } + } + + offset = (int) ((size_t) s & 15); + if (offset != 0) + { + /* Check partial string. */ + aligned = (const char *) ((size_t) s & 0xfffffffffffffff0L); + value = _mm_load_si128 ((__m128i *) aligned); + + switch (offset) + { + case 1: + value = _mm_srli_si128 (value, 1); + break; + case 2: + value = _mm_srli_si128 (value, 2); + break; + case 3: + value = _mm_srli_si128 (value, 3); + break; + case 4: + value = _mm_srli_si128 (value, 4); + break; + case 5: + value = _mm_srli_si128 (value, 5); + break; + case 6: + value = _mm_srli_si128 (value, 6); + break; + case 7: + value = _mm_srli_si128 (value, 7); + break; + case 8: + value = _mm_srli_si128 (value, 8); + break; + case 9: + value = _mm_srli_si128 (value, 9); + break; + case 10: + value = _mm_srli_si128 (value, 10); + break; + case 11: + value = _mm_srli_si128 (value, 11); + break; + case 12: + value = _mm_srli_si128 (value, 12); + break; + case 13: + value = _mm_srli_si128 (value, 13); + break; + case 14: + value = _mm_srli_si128 (value, 14); + break; + case 15: + value = _mm_srli_si128 (value, 15); + break; + } + + length = _mm_cmpistri (mask, value, 0x2); + /* No need to check ZFlag since ZFlag is always 1. */ + cflag = _mm_cmpistrc (mask, value, 0x2); + if (cflag) +#ifdef USE_AS_STRPBRK + return (char *) (s + length); +#else + return length; +#endif + /* Find where the NULL terminator is. */ + index = _mm_cmpistri (value, value, 0x3a); + if (index < 16 - offset) +#ifdef USE_AS_STRPBRK + return NULL; +#else + return index; +#endif + aligned += 16; + } + else + aligned = s; + +loop: + value = _mm_load_si128 ((__m128i *) aligned); + index = _mm_cmpistri (mask, value, 0x2); + cflag = _mm_cmpistrc (mask, value, 0x2); + zflag = _mm_cmpistrz (mask, value, 0x2); + if (cflag) +#ifdef USE_AS_STRPBRK + return (char *) (aligned + index); +#else + return (size_t) (aligned + index - s); +#endif + if (zflag) +#ifdef USE_AS_STRPBRK + return NULL; +#else + { + /* Find where the NULL terminator is. */ + index = _mm_cmpistri (value, value, 0x3a); + return (size_t) (aligned + index - s); + } +#endif + aligned += 16; + goto loop; +} diff --git a/sysdeps/x86_64/multiarch/strcspn.S b/sysdeps/x86_64/multiarch/strcspn.S new file mode 100644 index 0000000000..cc75ab70e6 --- /dev/null +++ b/sysdeps/x86_64/multiarch/strcspn.S @@ -0,0 +1,82 @@ +/* Multiple versions of strcspn + Copyright (C) 2009 Free Software Foundation, Inc. + Contributed by Intel Corporation. + 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <config.h> + +#ifdef HAVE_SSE4_SUPPORT + +#include <sysdep.h> +#include <ifunc-defines.h> + +#ifdef USE_AS_STRPBRK +#define STRCSPN_SSE42 __strpbrk_sse42 +#define STRCSPN_SSE2 __strpbrk_sse2 +#define __GI_STRCSPN __GI_strpbrk +#else +#ifndef STRCSPN +#define STRCSPN strcspn +#define STRCSPN_SSE42 __strcspn_sse42 +#define STRCSPN_SSE2 __strcspn_sse2 +#define __GI_STRCSPN __GI_strcspn +#endif +#endif + +/* Define multiple versions only for the definition in libc. Don't + define multiple versions for strpbrk in static library since we + need strpbrk before the initialization happened. */ +#if (defined SHARED || !defined USE_AS_STRPBRK) && !defined NOT_IN_libc + .text +ENTRY(STRCSPN) + .type STRCSPN, @gnu_indirect_function + cmpl $0, __cpu_features+KIND_OFFSET(%rip) + jne 1f + call __init_cpu_features +1: leaq STRCSPN_SSE2(%rip), %rax + testl $(1<<20), __cpu_features+CPUID_OFFSET+COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET(%rip) + jz 2f + leaq STRCSPN_SSE42(%rip), %rax +2: ret +END(STRCSPN) + +# undef ENTRY +# define ENTRY(name) \ + .type STRCSPN_SSE2, @function; \ + .globl STRCSPN_SSE2; \ + .align 16; \ + STRCSPN_SSE2: cfi_startproc; \ + CALL_MCOUNT +# undef END +# define END(name) \ + cfi_endproc; .size STRCSPN_SSE2, .-STRCSPN_SSE2 +# undef libc_hidden_builtin_def +/* It doesn't make sense to send libc-internal strcspn calls through a PLT. + The speedup we get from using SSE4.2 instruction is likely eaten away + by the indirect call in the PLT. */ +# define libc_hidden_builtin_def(name) \ + .globl __GI_STRCSPN; __GI_STRCSPN = STRCSPN_SSE2 +#endif + +#endif /* HAVE_SSE4_SUPPORT */ + +#ifdef USE_AS_STRPBRK +#include "../strpbrk.S" +#else +#include "../strcspn.S" +#endif diff --git a/sysdeps/x86_64/multiarch/strpbrk-c.c b/sysdeps/x86_64/multiarch/strpbrk-c.c new file mode 100644 index 0000000000..c58dcb5605 --- /dev/null +++ b/sysdeps/x86_64/multiarch/strpbrk-c.c @@ -0,0 +1,4 @@ +#define USE_AS_STRPBRK +#define STRCSPN_SSE2 __strpbrk_sse2 +#define STRCSPN_SSE42 __strpbrk_sse42 +#include "strcspn-c.c" diff --git a/sysdeps/x86_64/multiarch/strpbrk.S b/sysdeps/x86_64/multiarch/strpbrk.S new file mode 100644 index 0000000000..ed5bca6a94 --- /dev/null +++ b/sysdeps/x86_64/multiarch/strpbrk.S @@ -0,0 +1,3 @@ +#define STRCSPN strpbrk +#define USE_AS_STRPBRK +#include "strcspn.S" diff --git a/sysdeps/x86_64/multiarch/strspn-c.c b/sysdeps/x86_64/multiarch/strspn-c.c new file mode 100644 index 0000000000..e48e4a7207 --- /dev/null +++ b/sysdeps/x86_64/multiarch/strspn-c.c @@ -0,0 +1,287 @@ +/* strspn with SSE4.2 intrinsics + Copyright (C) 2009 Free Software Foundation, Inc. + Contributed by Intel Corporation. + 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <nmmintrin.h> +#include <string.h> + +/* We use 0x12: + _SIDD_SBYTE_OPS + | _SIDD_CMP_EQUAL_ANY + | _SIDD_NEGATIVE_POLARITY + | _SIDD_LEAST_SIGNIFICANT + on pcmpistri to compare xmm/mem128 + + 0 1 2 3 4 5 6 7 8 9 A B C D E F + X X X X X X X X X X X X X X X X + + against xmm + + 0 1 2 3 4 5 6 7 8 9 A B C D E F + A A A A A A A A A A A A A A A A + + to find out if the first 16byte data element has any non-A byte and + the offset of the first byte. There are 2 cases: + + 1. The first 16byte data element has the non-A byte, including + EOS, at the offset X. + 2. The first 16byte data element is valid and doesn't have the non-A + byte. + + Here is the table of ECX, CFlag, ZFlag and SFlag for 2 cases: + + case ECX CFlag ZFlag SFlag + 1 X 1 0/1 0 + 2 16 0 0 0 + + We exit from the loop for case 1. */ + +extern size_t __strspn_sse2 (const char *, const char *); + +size_t +__attribute__ ((section (".text.sse4.2"))) +__strspn_sse42 (const char *s, const char *a) +{ + int offset; + const char *aligned; + __m128i mask, mask0, mask1; + __m128i value; + int index, length; + int cflag; + + if (*a == 0) + return 0; + + offset = (int) ((size_t) a & 15); + if (offset != 0) + { + /* Load masks. */ + aligned = (const char *) ((size_t) a & 0xfffffffffffffff0L); + mask0 = _mm_load_si128 ((__m128i *) aligned); + + switch (offset) + { + case 1: + mask = _mm_srli_si128 (mask0, 1); + break; + case 2: + mask = _mm_srli_si128 (mask0, 2); + break; + case 3: + mask = _mm_srli_si128 (mask0, 3); + break; + case 4: + mask = _mm_srli_si128 (mask0, 4); + break; + case 5: + mask = _mm_srli_si128 (mask0, 5); + break; + case 6: + mask = _mm_srli_si128 (mask0, 6); + break; + case 7: + mask = _mm_srli_si128 (mask0, 7); + break; + case 8: + mask = _mm_srli_si128 (mask0, 8); + break; + case 9: + mask = _mm_srli_si128 (mask0, 9); + break; + case 10: + mask = _mm_srli_si128 (mask0, 10); + break; + case 11: + mask = _mm_srli_si128 (mask0, 11); + break; + case 12: + mask = _mm_srli_si128 (mask0, 12); + break; + case 13: + mask = _mm_srli_si128 (mask0, 13); + break; + case 14: + mask = _mm_srli_si128 (mask0, 14); + break; + case 15: + mask = _mm_srli_si128 (mask0, 15); + break; + } + + /* Find where the NULL terminator is. */ + length = _mm_cmpistri (mask, mask, 0x3a); + if (length == 16 - offset) + { + /* There is no NULL terminator. */ + mask1 = _mm_load_si128 ((__m128i *) (aligned + 16)); + index = _mm_cmpistri (mask1, mask1, 0x3a); + length += index; + + /* Don't use SSE4.2 if the length of A > 16. */ + if (length > 16) + return __strspn_sse2 (s, a); + + if (index != 0) + { + /* Combine mask0 and mask1. */ + switch (offset) + { + case 1: + mask = _mm_alignr_epi8 (mask1, mask0, 1); + break; + case 2: + mask = _mm_alignr_epi8 (mask1, mask0, 2); + break; + case 3: + mask = _mm_alignr_epi8 (mask1, mask0, 3); + break; + case 4: + mask = _mm_alignr_epi8 (mask1, mask0, 4); + break; + case 5: + mask = _mm_alignr_epi8 (mask1, mask0, 5); + break; + case 6: + mask = _mm_alignr_epi8 (mask1, mask0, 6); + break; + case 7: + mask = _mm_alignr_epi8 (mask1, mask0, 7); + break; + case 8: + mask = _mm_alignr_epi8 (mask1, mask0, 8); + break; + case 9: + mask = _mm_alignr_epi8 (mask1, mask0, 9); + break; + case 10: + mask = _mm_alignr_epi8 (mask1, mask0, 10); + break; + case 11: + mask = _mm_alignr_epi8 (mask1, mask0, 11); + break; + case 12: + mask = _mm_alignr_epi8 (mask1, mask0, 12); + break; + case 13: + mask = _mm_alignr_epi8 (mask1, mask0, 13); + break; + case 14: + mask = _mm_alignr_epi8 (mask1, mask0, 14); + break; + case 15: + mask = _mm_alignr_epi8 (mask1, mask0, 15); + break; + } + } + } + } + else + { + /* A is aligned. */ + mask = _mm_load_si128 ((__m128i *) a); + + /* Find where the NULL terminator is. */ + length = _mm_cmpistri (mask, mask, 0x3a); + if (length == 16) + { + /* There is no NULL terminator. Don't use SSE4.2 if the length + of A > 16. */ + if (a[16] != 0) + return __strspn_sse2 (s, a); + } + } + + offset = (int) ((size_t) s & 15); + if (offset != 0) + { + /* Check partial string. */ + aligned = (const char *) ((size_t) s & 0xfffffffffffffff0L); + value = _mm_load_si128 ((__m128i *) aligned); + + switch (offset) + { + case 1: + value = _mm_srli_si128 (value, 1); + break; + case 2: + value = _mm_srli_si128 (value, 2); + break; + case 3: + value = _mm_srli_si128 (value, 3); + break; + case 4: + value = _mm_srli_si128 (value, 4); + break; + case 5: + value = _mm_srli_si128 (value, 5); + break; + case 6: + value = _mm_srli_si128 (value, 6); + break; + case 7: + value = _mm_srli_si128 (value, 7); + break; + case 8: + value = _mm_srli_si128 (value, 8); + break; + case 9: + value = _mm_srli_si128 (value, 9); + break; + case 10: + value = _mm_srli_si128 (value, 10); + break; + case 11: + value = _mm_srli_si128 (value, 11); + break; + case 12: + value = _mm_srli_si128 (value, 12); + break; + case 13: + value = _mm_srli_si128 (value, 13); + break; + case 14: + value = _mm_srli_si128 (value, 14); + break; + case 15: + value = _mm_srli_si128 (value, 15); + break; + } + + length = _mm_cmpistri (mask, value, 0x12); + /* No need to check CFlag since it is always 1. */ + if (length < 16 - offset) + return length; + /* Find where the NULL terminator is. */ + index = _mm_cmpistri (value, value, 0x3a); + if (index < 16 - offset) + return length; + aligned += 16; + } + else + aligned = s; + +loop: + value = _mm_load_si128 ((__m128i *) aligned); + index = _mm_cmpistri (mask, value, 0x12); + cflag = _mm_cmpistrc (mask, value, 0x12); + if (cflag) + return (size_t) (aligned + index - s); + aligned += 16; + goto loop; +} diff --git a/sysdeps/x86_64/multiarch/strspn.S b/sysdeps/x86_64/multiarch/strspn.S new file mode 100644 index 0000000000..4183a2cf60 --- /dev/null +++ b/sysdeps/x86_64/multiarch/strspn.S @@ -0,0 +1,63 @@ +/* Multiple versions of strspn + Copyright (C) 2009 Free Software Foundation, Inc. + Contributed by Intel Corporation. + 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <config.h> + +#ifdef HAVE_SSE4_SUPPORT + +#include <sysdep.h> +#include <ifunc-defines.h> + +/* Define multiple versions only for the definition in libc. */ +#ifndef NOT_IN_libc + .text +ENTRY(strspn) + .type strspn, @gnu_indirect_function + cmpl $0, __cpu_features+KIND_OFFSET(%rip) + jne 1f + call __init_cpu_features +1: leaq __strspn_sse2(%rip), %rax + testl $(1<<20), __cpu_features+CPUID_OFFSET+COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET(%rip) + jz 2f + leaq __strspn_sse42(%rip), %rax +2: ret +END(strspn) + +# undef ENTRY +# define ENTRY(name) \ + .type __strspn_sse2, @function; \ + .globl __strspn_sse2; \ + .align 16; \ + __strspn_sse2: cfi_startproc; \ + CALL_MCOUNT +# undef END +# define END(name) \ + cfi_endproc; .size __strspn_sse2, .-__strspn_sse2 +# undef libc_hidden_builtin_def +/* It doesn't make sense to send libc-internal strspn calls through a PLT. + The speedup we get from using SSE4.2 instruction is likely eaten away + by the indirect call in the PLT. */ +# define libc_hidden_builtin_def(name) \ + .globl __GI_strspn; __GI_strspn = __strspn_sse2 +#endif + +#endif /* HAVE_SSE4_SUPPORT */ + +#include "../strspn.S" |