t...@gmplib.org (Torbjörn Granlund) writes: > ni...@lysator.liu.se (Niels Möller) writes: > > $ ./tune/speed -p 100000 -s 1-64 -t 3 -C mpn_gcd_11 mpn_gcd_22 > overhead 4.01 cycles, precision 100000 units of 5.08e-10 secs, CPU freq > 1966.75 MHz > mpn_gcd_11 mpn_gcd_22 > 1 #7.0459 11.0729 > 4 #2.8721 6.6946 > 7 #2.8415 7.3658 > 10 #3.3039 7.4346 > 13 #3.6084 7.8537 > 16 #4.0952 7.8193 > 19 #4.0620 8.0769 > 22 #3.9624 7.9849 > 25 #3.9169 8.0956 > 28 #4.0359 8.2084 > 31 #3.9816 8.0920 > 34 #3.9748 8.0933 > 37 #4.0041 8.0792 > 40 #3.9327 8.0656 > 43 #3.9239 8.1070 > 46 #3.9064 8.0289 > 49 #3.9143 8.0191 > 52 #4.0642 9.5547 > 55 #4.1251 9.8507 > 58 #4.2523 7.9096 > 61 #3.8440 7.8590 > 64 #3.8325 7.8398 > > Is that right column for C code? That's pretty good!
Yep. I take it branches in the old code were expensive... > I reach performance of 1.5t and 2t where t is the gcd_11 time. The above is also about 1.5t, if compared to the C gcd_11, which runs at 5.4 cycles per input bit on my machine. I've just pushed the new gcd_22. Regards, /Niels -- Niels Möller. PGP-encrypted email is preferred. Keyid 368C6677. Internet email is subject to wholesale government surveillance. _______________________________________________ gmp-devel mailing list gmp-devel@gmplib.org https://gmplib.org/mailman/listinfo/gmp-devel
