1. 4677d4a arch, hweight: Fix compilation errors by Borislav Petkov · 15 years ago
  2. d61931d x86: Add optimized popcnt variants by Borislav Petkov · 15 years ago
  3. 1527bc8 bitops: Optimize hweight() by making use of compile-time evaluation by Peter Zijlstra · 15 years ago