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| author | Vidya Ranganathan <vidya@linux.vnet.ibm.com> | 2014-03-10 12:20:36 -0400 |
|---|---|---|
| committer | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | 2014-03-11 08:54:33 -0500 |
| commit | e65caf1f1df4ecc122da3d30689ee2e8e2bd354f (patch) | |
| tree | 512c80cac0072cacd0fe600c85eb208016406138 /string/test-memrchr.c | |
| parent | ba9cc0714e58a9e8fa73cf6b0e205cbf1e6b71f2 (diff) | |
| download | glibc-e65caf1f1df4ecc122da3d30689ee2e8e2bd354f.tar.gz glibc-e65caf1f1df4ecc122da3d30689ee2e8e2bd354f.tar.xz glibc-e65caf1f1df4ecc122da3d30689ee2e8e2bd354f.zip | |
PowerPC: strspn optimization for PPC64/POWER7
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.
Diffstat (limited to 'string/test-memrchr.c')
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