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author | Paul E. Murphy <murphyp@linux.vnet.ibm.com> | 2016-03-14 17:40:46 -0400 |
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committer | Paul E. Murphy <murphyp@linux.vnet.ibm.com> | 2016-04-07 15:51:28 -0500 |
commit | 25dba0ad054723196fb633ba5d8a463ef5cb775c (patch) | |
tree | 03f9259662b03ea65b00bc6721afba2d47104bef /sysdeps/powerpc/powerpc64/multiarch/strspn-ppc64.c | |
parent | 1d2a8245ff7bcc1d8be54f01e26c49297e446aba (diff) | |
download | glibc-25dba0ad054723196fb633ba5d8a463ef5cb775c.tar.gz glibc-25dba0ad054723196fb633ba5d8a463ef5cb775c.tar.xz glibc-25dba0ad054723196fb633ba5d8a463ef5cb775c.zip |
powerpc: Add optimized P8 strspn
This utilizes vectors and bitmasks. For small needle, large haystack, the performance improvement is upto 8x. For short strings (0-4B), the cost of computing the bitmask dominates, and is a tad slower.
Diffstat (limited to 'sysdeps/powerpc/powerpc64/multiarch/strspn-ppc64.c')
-rw-r--r-- | sysdeps/powerpc/powerpc64/multiarch/strspn-ppc64.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strspn-ppc64.c b/sysdeps/powerpc/powerpc64/multiarch/strspn-ppc64.c new file mode 100644 index 0000000000..4c63665385 --- /dev/null +++ b/sysdeps/powerpc/powerpc64/multiarch/strspn-ppc64.c @@ -0,0 +1,25 @@ +/* Default strspn implementation for PowerPC64. + Copyright (C) 2016 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/>. */ + +#define STRSPN __strspn_ppc +#ifdef SHARED +#undef libc_hidden_def +#define libc_hidden_def(name) +#endif + +#include <string/strspn.c> |