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| author | Anton Blanchard <anton@ozlabs.org> | 2020-05-14 21:49:16 +1000 |
|---|---|---|
| committer | Paul E. Murphy <murphyp@linux.vnet.ibm.com> | 2020-05-18 17:08:54 -0500 |
| commit | 765de945efc5d5602999b2999fe8abdf04881370 (patch) | |
| tree | 8c252731dcf3fc61ae700a5dba120c1eafc8f41f /sysdeps/powerpc/powerpc64/multiarch | |
| parent | 9e38f455a6c602be86b7b5a8d6523cbdcd7ec051 (diff) | |
| download | glibc-765de945efc5d5602999b2999fe8abdf04881370.tar.gz glibc-765de945efc5d5602999b2999fe8abdf04881370.tar.xz glibc-765de945efc5d5602999b2999fe8abdf04881370.zip | |
powerpc: Optimized rawmemchr for POWER9
This version uses vector instructions and is up to 60% faster on medium
matches and up to 90% faster on long matches, compared to the POWER7
version. A few examples:
__rawmemchr_power9 __rawmemchr_power7
Length 32, alignment 0: 2.27566 3.77765
Length 64, alignment 2: 2.46231 3.51064
Length 1024, alignment 0: 17.3059 32.6678
Diffstat (limited to 'sysdeps/powerpc/powerpc64/multiarch')
4 files changed, 38 insertions, 3 deletions
diff --git a/sysdeps/powerpc/powerpc64/multiarch/Makefile b/sysdeps/powerpc/powerpc64/multiarch/Makefile index 61a6901f7d..fc2268f6b5 100644 --- a/sysdeps/powerpc/powerpc64/multiarch/Makefile +++ b/sysdeps/powerpc/powerpc64/multiarch/Makefile @@ -32,7 +32,8 @@ sysdep_routines += memcpy-power8-cached memcpy-power7 memcpy-a2 memcpy-power6 \ strncase-power8 ifneq (,$(filter %le,$(config-machine))) -sysdep_routines += strcmp-power9 strncmp-power9 strcpy-power9 stpcpy-power9 +sysdep_routines += strcmp-power9 strncmp-power9 strcpy-power9 stpcpy-power9 \ + rawmemchr-power9 endif CFLAGS-strncase-power7.c += -mcpu=power7 -funroll-loops CFLAGS-strncase_l-power7.c += -mcpu=power7 -funroll-loops diff --git a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c index 8021d8d8fa..59a227ee22 100644 --- a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c +++ b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c @@ -216,6 +216,11 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array, /* Support sysdeps/powerpc/powerpc64/multiarch/rawmemchr.c. */ IFUNC_IMPL (i, name, rawmemchr, +#ifdef __LITTLE_ENDIAN__ + IFUNC_IMPL_ADD (array, i, rawmemchr, + hwcap2 & PPC_FEATURE2_ARCH_3_00, + __rawmemchr_power9) +#endif IFUNC_IMPL_ADD (array, i, rawmemchr, hwcap & PPC_FEATURE_HAS_VSX, __rawmemchr_power7) diff --git a/sysdeps/powerpc/powerpc64/multiarch/rawmemchr-power9.S b/sysdeps/powerpc/powerpc64/multiarch/rawmemchr-power9.S new file mode 100644 index 0000000000..bac0a9090e --- /dev/null +++ b/sysdeps/powerpc/powerpc64/multiarch/rawmemchr-power9.S @@ -0,0 +1,21 @@ +/* Optimized rawmemchr implementation for PowerPC64/POWER9. + Copyright (C) 2020 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 + <https://www.gnu.org/licenses/>. */ + +#define RAWMEMCHR __rawmemchr_power9 + +#include <sysdeps/powerpc/powerpc64/le/power9/rawmemchr.S> diff --git a/sysdeps/powerpc/powerpc64/multiarch/rawmemchr.c b/sysdeps/powerpc/powerpc64/multiarch/rawmemchr.c index 847157e5f0..c49c0c51ff 100644 --- a/sysdeps/powerpc/powerpc64/multiarch/rawmemchr.c +++ b/sysdeps/powerpc/powerpc64/multiarch/rawmemchr.c @@ -24,13 +24,21 @@ extern __typeof (__rawmemchr) __rawmemchr_ppc attribute_hidden; extern __typeof (__rawmemchr) __rawmemchr_power7 attribute_hidden; +# ifdef __LITTLE_ENDIAN__ +extern __typeof (__rawmemchr) __rawmemchr_power9 attribute_hidden; +# endif + # undef __rawmemchr /* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle ifunc symbol properly. */ libc_ifunc_redirected (__redirect___rawmemchr, __rawmemchr, - (hwcap & PPC_FEATURE_HAS_VSX) - ? __rawmemchr_power7 +# ifdef __LITTLE_ENDIAN__ + (hwcap2 & PPC_FEATURE2_ARCH_3_00) + ? __rawmemchr_power9 : +# endif + (hwcap & PPC_FEATURE_HAS_VSX) + ? __rawmemchr_power7 : __rawmemchr_ppc); weak_alias (__rawmemchr, rawmemchr) |