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authorVidya Ranganathan <vidya@linux.vnet.ibm.com>2014-03-10 12:20:36 -0400
committerAdhemerval Zanella <azanella@linux.vnet.ibm.com>2014-03-11 08:54:33 -0500
commite65caf1f1df4ecc122da3d30689ee2e8e2bd354f (patch)
tree512c80cac0072cacd0fe600c85eb208016406138 /nptl_db/shlib-versions
parentba9cc0714e58a9e8fa73cf6b0e205cbf1e6b71f2 (diff)
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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.
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