https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81616
--- Comment #21 from Jan Hubicka <hubicka at ucw dot cz> --- Hi, this is comparing SPEC2000 -Ofast -march=native -mprefer-vector-width=128 to -Ofast -march=native -mprefer-vector-width=256 on Ryzen. 168.wupwise 1600 28.2 5669 * 1600 30.8 5187 * 171.swim 3100 26.4 11763 * 3100 27.5 11261 * 172.mgrid 1800 26.1 6907 * 1800 30.9 5827 * 173.applu 2100 25.5 8234 * 2100 25.7 8161 * 177.mesa 1400 23.4 5971 * 1400 23.2 6030 * 178.galgel X X 179.art 2600 10.9 23752 * 2600 10.9 23777 * 183.equake 1300 12.9 10047 * 1300 12.9 10063 * 187.facerec 1900 17.2 11025 * 1900 24.0 7921 * 188.ammp 2200 34.2 6431 * 2200 34.4 6397 * 189.lucas 2000 20.3 9859 * 2000 20.4 9807 * 191.fma3d 2100 29.7 7061 * 2100 31.4 6694 * 200.sixtrack 1100 38.8 2834 * 1100 41.5 2648 * 301.apsi 2600 33.0 7873 * 2600 33.1 7856 * Est. SPECfp_base2000 8049 Est. SPECfp2000 7590 164.gzip 1400 57.1 2450 * 1400 58.0 2413 * 175.vpr 1400 37.4 3746 * 1400 37.5 3733 * 176.gcc 1100 20.2 5450 * 1100 20.0 5489 * 181.mcf 1800 21.7 8310 * 1800 21.4 8402 * 186.crafty 1000 20.5 4874 * 1000 20.9 4794 * 197.parser 1800 51.7 3481 * 1800 51.5 3498 * 252.eon 1300 18.2 7154 * 1300 19.2 6759 * 253.perlbmk X X 254.gap X X 255.vortex X X 256.bzip2 1500 42.6 3522 * 1500 42.9 3496 * 300.twolf 3000 56.5 5313 * 3000 56.3 5330 * Est. SPECint_base2000 4612 Est. SPECint2000 4575 So it does not seem to be win in general. I will compare with -mtune=haswell now
