lib/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2025-07-29 11:41:21 +03:00
Code Activity

PowerPC: strspn optimization for PPC64/POWER7

Browse Source 
The optimization is achieved by following techniques:
  > hashing of needle.
  > hashing avoids scanning of duplicate entries in needle across the string.
  > initializing the hash table with Vector instructions (VSX) by quadword access.
  > unrolling when scanning for character in string across hash table.
This commit is contained in:
Vidya Ranganathan
2014-03-10 12:20:36 -04:00
committed by Adhemerval Zanella
parent ba9cc0714e
commit e65caf1f1d
8 changed files with 296 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
string/strspn.c
View File

@ -18,13 +18,14 @@
#include <string.h>
#undef strspn
#ifndef STRSPN
#define STRSPN strspn
#endif
/* Return the length of the maximum initial segment
of S which contains only characters in ACCEPT. */
size_t
strspn (s, accept)
const char *s;
const char *accept;
STRSPN (const char *s, const char *accept)
{
const char *p;
const char *a;