sent patch to Atrides, hopefully gets into 1gh cpuminer.
kecasm.patch SHA3-512 checksum d1a2a36620e0b6b392ee6400276a8ede9b08a9ab23e2607ab6e16aeeef50d3ca679ffbcfcb19106 1f1247e1f56d1a6574818b50d7181cda739ff7d0d8aa35963
I have tested the path on one of my old server (64bit, 4core XEON E5405 2GHz with HT)
Ohne path: 6600 khash/s
With path: 7660 khash/s
It means +16%
works only on 64bit
Well well, that CPU is from 2007 ;-D It was not optimized for that CPU.
can you try changing KeccakF-1600-x86-64-shld-gas.s
UseSIMD = 0
You could also mention Core i5-2600K changes in README: 4100 to 8100 khash/s