Top Questions

1. x86_64 best way to reduce 64 bit register to 32 bit retaining zero or non-zero status
   38 votes

   2 answers
2. Why does does a NOP (as a 5th uop) speed up a 4 uop loop on Ice Lake?
   10 votes

   0 answers
3. Optimize lookup tables to simple ALU
   9 votes

   2 answers
4. Why am I seeing more RFO (Read For Ownership) requests using REP MOVSB than with vmovdqa
   6 votes

   0 answers
5. Convert std::vector<uint8_t> to packed std::vector<uint64_t>
   5 votes

   1 answers