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| author | Raphael M Zinsly <rzinsly@linux.ibm.com> | 2020-11-12 13:12:24 -0300 |
|---|---|---|
| committer | Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com> | 2020-11-12 13:12:24 -0300 |
| commit | b9d83bf3eb57e1cf8ef785f1a58e13ddf162b6f3 (patch) | |
| tree | 35ea78f972edcca80ac72d25f2b20e9d4cdef9f6 /sysdeps/powerpc/powerpc64/multiarch | |
| parent | b7aa84d5a5d0deaf7657191e0cd9d1d83d145dab (diff) | |
| download | glibc-b9d83bf3eb57e1cf8ef785f1a58e13ddf162b6f3.tar.gz glibc-b9d83bf3eb57e1cf8ef785f1a58e13ddf162b6f3.tar.xz glibc-b9d83bf3eb57e1cf8ef785f1a58e13ddf162b6f3.zip | |
powerpc: Add optimized strncpy for POWER9
Similar to the strcpy P9 optimization, this version uses VSX to improve performance. Reviewed-by: Matheus Castanho <msc@linux.ibm.com> Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
Diffstat (limited to 'sysdeps/powerpc/powerpc64/multiarch')
4 files changed, 47 insertions, 1 deletions
diff --git a/sysdeps/powerpc/powerpc64/multiarch/Makefile b/sysdeps/powerpc/powerpc64/multiarch/Makefile index 19acb6c64a..cd2b47b403 100644 --- a/sysdeps/powerpc/powerpc64/multiarch/Makefile +++ b/sysdeps/powerpc/powerpc64/multiarch/Makefile @@ -33,7 +33,7 @@ sysdep_routines += memcpy-power8-cached memcpy-power7 memcpy-a2 memcpy-power6 \ ifneq (,$(filter %le,$(config-machine))) sysdep_routines += strcmp-power9 strncmp-power9 strcpy-power9 stpcpy-power9 \ - rawmemchr-power9 strlen-power9 + rawmemchr-power9 strlen-power9 strncpy-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 dd54e7d6bb..135326c97a 100644 --- a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c +++ b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c @@ -301,6 +301,12 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array, /* Support sysdeps/powerpc/powerpc64/multiarch/strncpy.c. */ IFUNC_IMPL (i, name, strncpy, +#ifdef __LITTLE_ENDIAN__ + IFUNC_IMPL_ADD (array, i, strncpy, + (hwcap2 & PPC_FEATURE2_ARCH_3_00) + && (hwcap & PPC_FEATURE_HAS_VSX), + __strncpy_power9) +#endif IFUNC_IMPL_ADD (array, i, strncpy, hwcap2 & PPC_FEATURE2_ARCH_2_07, __strncpy_power8) diff --git a/sysdeps/powerpc/powerpc64/multiarch/strncpy-power9.S b/sysdeps/powerpc/powerpc64/multiarch/strncpy-power9.S new file mode 100644 index 0000000000..2b57c190f5 --- /dev/null +++ b/sysdeps/powerpc/powerpc64/multiarch/strncpy-power9.S @@ -0,0 +1,32 @@ +/* Optimized strncpy implementation for POWER9 LE. + 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/>. */ + +#if defined __LITTLE_ENDIAN__ && IS_IN (libc) +# define STRNCPY __strncpy_power9 + +# undef libc_hidden_builtin_def +# define libc_hidden_builtin_def(name) + +/* memset is used to pad the end of the string. */ +# define MEMSET __memset_power8 +# ifdef SHARED +# define MEMSET_is_local +# endif + +# include <sysdeps/powerpc/powerpc64/le/power9/strncpy.S> +#endif diff --git a/sysdeps/powerpc/powerpc64/multiarch/strncpy.c b/sysdeps/powerpc/powerpc64/multiarch/strncpy.c index 7bacf28aca..af8b6cdd9c 100644 --- a/sysdeps/powerpc/powerpc64/multiarch/strncpy.c +++ b/sysdeps/powerpc/powerpc64/multiarch/strncpy.c @@ -28,11 +28,19 @@ extern __typeof (strncpy) __strncpy_ppc attribute_hidden; extern __typeof (strncpy) __strncpy_power7 attribute_hidden; extern __typeof (strncpy) __strncpy_power8 attribute_hidden; +# ifdef __LITTLE_ENDIAN__ +extern __typeof (strncpy) __strncpy_power9 attribute_hidden; +# endif # undef strncpy /* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle ifunc symbol properly. */ libc_ifunc_redirected (__redirect_strncpy, strncpy, +# ifdef __LITTLE_ENDIAN__ + (hwcap2 & PPC_FEATURE2_ARCH_3_00) && + (hwcap & PPC_FEATURE_HAS_VSX) + ? __strncpy_power9 : +# endif (hwcap2 & PPC_FEATURE2_ARCH_2_07) ? __strncpy_power8 : (hwcap & PPC_FEATURE_HAS_VSX) |