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| author | Anton Blanchard via Libc-alpha <libc-alpha@sourceware.org> | 2020-05-14 09:00:26 +1000 |
|---|---|---|
| committer | Paul E. Murphy <murphyp@linux.vnet.ibm.com> | 2020-05-18 08:26:22 -0500 |
| commit | 39037048502d52ab6422c18f2d178d6228d2c7b9 (patch) | |
| tree | f1362994b4b9665a2c8843b70e92fc30f49422d6 /sysdeps/powerpc/powerpc64/multiarch/strcpy-power9.S | |
| parent | 674ea88294bfb8d89878a0ebbbcec38a85e118a5 (diff) | |
| download | glibc-39037048502d52ab6422c18f2d178d6228d2c7b9.tar.gz glibc-39037048502d52ab6422c18f2d178d6228d2c7b9.tar.xz glibc-39037048502d52ab6422c18f2d178d6228d2c7b9.zip | |
powerpc: Optimized strcpy for POWER9
This version uses VSX store vector with length instructions and is
significantly faster on small strings and relatively unaligned large
strings, compared to the POWER8 version. A few examples:
__strcpy_power9 __strcpy_power8
Length 16, alignments in bytes 0/ 0: 2.52454 4.62695
Length 412, alignments in bytes 4/ 0: 11.6 22.9185
Diffstat (limited to 'sysdeps/powerpc/powerpc64/multiarch/strcpy-power9.S')
| -rw-r--r-- | sysdeps/powerpc/powerpc64/multiarch/strcpy-power9.S | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strcpy-power9.S b/sysdeps/powerpc/powerpc64/multiarch/strcpy-power9.S new file mode 100644 index 0000000000..d22aa0a8d6 --- /dev/null +++ b/sysdeps/powerpc/powerpc64/multiarch/strcpy-power9.S @@ -0,0 +1,26 @@ +/* Optimized strcpy implementation for POWER9/PPC64. + Copyright (C) 2016-2020 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 STRCPY __strcpy_power9 + +#undef libc_hidden_builtin_def +#define libc_hidden_builtin_def(name) + +#include <sysdeps/powerpc/powerpc64/le/power9/strcpy.S> +#endif |