Implementation notes: amd64, genji262, crypto_hash/skein10241024

Computer: genji262
Architecture: amd64
CPU ID: AuthenticAMD-00800f12-178bfbff
SUPERCOP version: 20180818
Operation: crypto_hash
Primitive: skein10241024
TimeImplementationCompilerBenchmark dateSUPERCOP version
8844optgcc -m64 -march=corei7-avx -O2 -fomit-frame-pointer2018081920180818
8866optgcc -m64 -march=core-avx-i -O2 -fomit-frame-pointer2018081920180818
8866optgcc -m64 -march=corei7 -O2 -fomit-frame-pointer2018081920180818
8888optgcc -m64 -march=core2 -msse4 -O2 -fomit-frame-pointer2018081920180818
8910optgcc -m64 -march=core2 -O2 -fomit-frame-pointer2018081920180818
8910optgcc -m64 -march=core2 -msse4.1 -O2 -fomit-frame-pointer2018081920180818
8932optgcc -m64 -march=core-avx2 -O2 -fomit-frame-pointer2018081920180818
9152optgcc -O2 -fomit-frame-pointer2018081920180818
9152optgcc -funroll-loops -march=nocona -O2 -fomit-frame-pointer2018081920180818
9174optgcc -fno-schedule-insns -O2 -fomit-frame-pointer2018081920180818
9174optgcc -funroll-loops -m64 -O2 -fomit-frame-pointer2018081920180818
9196optgcc -funroll-loops -fno-schedule-insns -O2 -fomit-frame-pointer2018081920180818
9196optgcc -funroll-loops -m64 -march=nocona -O -fomit-frame-pointer2018081920180818
9196optgcc -m64 -O2 -fomit-frame-pointer2018081920180818
9196optgcc -march=nocona -O2 -fomit-frame-pointer2018081920180818
9218optgcc -funroll-loops -O2 -fomit-frame-pointer2018081920180818
9218optgcc -funroll-loops -fno-schedule-insns -O -fomit-frame-pointer2018081920180818
9218optgcc -funroll-loops -m64 -march=nocona -O2 -fomit-frame-pointer2018081920180818
9240optgcc -fno-schedule-insns -O -fomit-frame-pointer2018081920180818
9240optgcc -funroll-loops -O -fomit-frame-pointer2018081920180818
9240optgcc -funroll-loops -m64 -O -fomit-frame-pointer2018081920180818
9240optgcc -m64 -march=core2 -msse4 -O -fomit-frame-pointer2018081920180818
9262optgcc -funroll-loops -march=nocona -O -fomit-frame-pointer2018081920180818
9262optgcc -m64 -O -fomit-frame-pointer2018081920180818
9262optgcc -m64 -march=nocona -O2 -fomit-frame-pointer2018081920180818
9284optgcc -march=nocona -O -fomit-frame-pointer2018081920180818
9306optgcc -m64 -march=core2 -msse4.1 -O -fomit-frame-pointer2018081920180818
9350optgcc -m64 -march=core2 -O -fomit-frame-pointer2018081920180818
9394optgcc -m64 -march=core-avx-i -O -fomit-frame-pointer2018081920180818
9394optgcc -m64 -march=corei7-avx -O -fomit-frame-pointer2018081920180818
9416optgcc -m64 -march=corei7 -O -fomit-frame-pointer2018081920180818
9416optgcc -m64 -march=native -mtune=native -O2 -fomit-frame-pointer2018081920180818
9438optgcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv2018081920180818
9460optgcc -m64 -march=core-avx2 -O -fomit-frame-pointer2018081920180818
9482optgcc -funroll-loops -m64 -march=k8 -O2 -fomit-frame-pointer2018081920180818
9504optgcc -funroll-loops -march=barcelona -O2 -fomit-frame-pointer2018081920180818
9504optgcc -funroll-loops -march=k8 -O2 -fomit-frame-pointer2018081920180818
9526optgcc -funroll-loops -m64 -march=barcelona -O -fomit-frame-pointer2018081920180818
9526optgcc -funroll-loops -march=barcelona -O -fomit-frame-pointer2018081920180818
9526optgcc -m64 -march=nocona -O -fomit-frame-pointer2018081920180818
9526optgcc -march=k8 -O2 -fomit-frame-pointer2018081920180818
9548optgcc -funroll-loops -m64 -march=barcelona -O2 -fomit-frame-pointer2018081920180818
9548optgcc -funroll-loops -march=k8 -O -fomit-frame-pointer2018081920180818
9548optgcc -m64 -march=k8 -O2 -fomit-frame-pointer2018081920180818
9548optgcc -m64 -march=native -mtune=native -O -fomit-frame-pointer2018081920180818
9570optgcc -funroll-loops -m64 -march=k8 -O -fomit-frame-pointer2018081920180818
9570optgcc -m64 -march=barcelona -O2 -fomit-frame-pointer2018081920180818
9570optgcc -march=barcelona -O2 -fomit-frame-pointer2018081920180818
9570optgcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv2018081920180818
9592optgcc -O -fomit-frame-pointer2018081920180818
9614optgcc -m64 -march=barcelona -O -fomit-frame-pointer2018081920180818
9636optgcc -m64 -march=k8 -O -fomit-frame-pointer2018081920180818
9636optgcc -march=k8 -O -fomit-frame-pointer2018081920180818
9658optgcc -march=barcelona -O -fomit-frame-pointer2018081920180818
10582optgcc -m64 -march=core-avx-i -O3 -fomit-frame-pointer2018081920180818
10582optgcc -m64 -march=corei7-avx -O3 -fomit-frame-pointer2018081920180818
10648optgcc -funroll-loops -fno-schedule-insns -O3 -fomit-frame-pointer2018081920180818
10670optgcc -funroll-loops -O3 -fomit-frame-pointer2018081920180818
10670optgcc -funroll-loops -m64 -O3 -fomit-frame-pointer2018081920180818
10670optgcc -m64 -march=core-avx2 -O3 -fomit-frame-pointer2018081920180818
10670optgcc -m64 -march=native -mtune=native -Os -fomit-frame-pointer2018081920180818
10692optgcc -m64 -march=corei7 -O3 -fomit-frame-pointer2018081920180818
10736optgcc -fno-schedule-insns -O3 -fomit-frame-pointer2018081920180818
10736optgcc -m64 -march=core2 -msse4.1 -O3 -fomit-frame-pointer2018081920180818
10736optgcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv2018081920180818
10758optgcc -m64 -O3 -fomit-frame-pointer2018081920180818
10758optgcc -m64 -march=core2 -O3 -fomit-frame-pointer2018081920180818
10758optgcc -m64 -march=core2 -msse4 -O3 -fomit-frame-pointer2018081920180818
10780optgcc -m64 -march=barcelona -Os -fomit-frame-pointer2018081920180818
10780optgcc -march=barcelona -Os -fomit-frame-pointer2018081920180818
10802optgcc -O3 -fomit-frame-pointer2018081920180818
10802optgcc -m64 -march=core-avx-i -Os -fomit-frame-pointer2018081920180818
10802optgcc -m64 -march=core2 -msse4 -Os -fomit-frame-pointer2018081920180818
10802optgcc -march=k8 -Os -fomit-frame-pointer2018081920180818
10824optgcc -funroll-loops -march=barcelona -Os -fomit-frame-pointer2018081920180818
10824optgcc -m64 -march=core2 -Os -fomit-frame-pointer2018081920180818
10824optgcc -m64 -march=core2 -msse4.1 -Os -fomit-frame-pointer2018081920180818
10824optgcc -m64 -march=corei7-avx -Os -fomit-frame-pointer2018081920180818
10824optgcc -m64 -march=corei7 -Os -fomit-frame-pointer2018081920180818
10824optgcc -m64 -march=k8 -Os -fomit-frame-pointer2018081920180818
10868optgcc -funroll-loops -m64 -march=k8 -Os -fomit-frame-pointer2018081920180818
10868optgcc -funroll-loops -march=k8 -Os -fomit-frame-pointer2018081920180818
10868optgcc -m64 -march=core-avx2 -Os -fomit-frame-pointer2018081920180818
10890optgcc -funroll-loops -Os -fomit-frame-pointer2018081920180818
10890optgcc -m64 -Os -fomit-frame-pointer2018081920180818
10912optgcc -funroll-loops -m64 -Os -fomit-frame-pointer2018081920180818
10912optgcc -funroll-loops -m64 -march=barcelona -Os -fomit-frame-pointer2018081920180818
10934optgcc -fno-schedule-insns -Os -fomit-frame-pointer2018081920180818
10934optgcc -funroll-loops -fno-schedule-insns -Os -fomit-frame-pointer2018081920180818
10978optgcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv2018081920180818
11000optgcc -m64 -march=native -mtune=native -O3 -fomit-frame-pointer2018081920180818
11022optgcc -Os -fomit-frame-pointer2018081920180818
11022optgcc -march=nocona -Os -fomit-frame-pointer2018081920180818
11044optgcc -funroll-loops -m64 -march=barcelona -O3 -fomit-frame-pointer2018081920180818
11044optgcc -funroll-loops -march=k8 -O3 -fomit-frame-pointer2018081920180818
11044optgcc -m64 -march=nocona -Os -fomit-frame-pointer2018081920180818
11088optgcc -funroll-loops -m64 -march=nocona -O3 -fomit-frame-pointer2018081920180818
11088optgcc -funroll-loops -march=barcelona -O3 -fomit-frame-pointer2018081920180818
11088optgcc -m64 -march=barcelona -O3 -fomit-frame-pointer2018081920180818
11088optgcc -m64 -march=nocona -O3 -fomit-frame-pointer2018081920180818
11088optgcc -march=barcelona -O3 -fomit-frame-pointer2018081920180818
11110optgcc -funroll-loops -m64 -march=nocona -Os -fomit-frame-pointer2018081920180818
11110optgcc -march=k8 -O3 -fomit-frame-pointer2018081920180818
11110optgcc -march=nocona -O3 -fomit-frame-pointer2018081920180818
11132optgcc -m64 -march=k8 -O3 -fomit-frame-pointer2018081920180818
11154optgcc -funroll-loops -m64 -march=k8 -O3 -fomit-frame-pointer2018081920180818
11154optgcc -funroll-loops -march=nocona -Os -fomit-frame-pointer2018081920180818
11176optgcc -funroll-loops -march=nocona -O3 -fomit-frame-pointer2018081920180818
34298optgcc -funroll-loops2018081920180818
34892optcc2018081920180818
34958optgcc2018081920180818

Test failure

Implementation: crypto_hash/skein10241024/x64
Compiler: cc
error 111

Number of similar (compiler,implementation) pairs: 107, namely:
CompilerImplementations
cc x64
gcc x64
gcc -O2 -fomit-frame-pointer x64
gcc -O3 -fomit-frame-pointer x64
gcc -O -fomit-frame-pointer x64
gcc -Os -fomit-frame-pointer x64
gcc -fno-schedule-insns -O2 -fomit-frame-pointer x64
gcc -fno-schedule-insns -O3 -fomit-frame-pointer x64
gcc -fno-schedule-insns -O -fomit-frame-pointer x64
gcc -fno-schedule-insns -Os -fomit-frame-pointer x64
gcc -funroll-loops x64
gcc -funroll-loops -O2 -fomit-frame-pointer x64
gcc -funroll-loops -O3 -fomit-frame-pointer x64
gcc -funroll-loops -O -fomit-frame-pointer x64
gcc -funroll-loops -Os -fomit-frame-pointer x64
gcc -funroll-loops -fno-schedule-insns -O2 -fomit-frame-pointer x64
gcc -funroll-loops -fno-schedule-insns -O3 -fomit-frame-pointer x64
gcc -funroll-loops -fno-schedule-insns -O -fomit-frame-pointer x64
gcc -funroll-loops -fno-schedule-insns -Os -fomit-frame-pointer x64
gcc -funroll-loops -m64 -O2 -fomit-frame-pointer x64
gcc -funroll-loops -m64 -O3 -fomit-frame-pointer x64
gcc -funroll-loops -m64 -O -fomit-frame-pointer x64
gcc -funroll-loops -m64 -Os -fomit-frame-pointer x64
gcc -funroll-loops -m64 -march=barcelona -O2 -fomit-frame-pointer x64
gcc -funroll-loops -m64 -march=barcelona -O3 -fomit-frame-pointer x64
gcc -funroll-loops -m64 -march=barcelona -O -fomit-frame-pointer x64
gcc -funroll-loops -m64 -march=barcelona -Os -fomit-frame-pointer x64
gcc -funroll-loops -m64 -march=k8 -O2 -fomit-frame-pointer x64
gcc -funroll-loops -m64 -march=k8 -O3 -fomit-frame-pointer x64
gcc -funroll-loops -m64 -march=k8 -O -fomit-frame-pointer x64
gcc -funroll-loops -m64 -march=k8 -Os -fomit-frame-pointer x64
gcc -funroll-loops -m64 -march=nocona -O2 -fomit-frame-pointer x64
gcc -funroll-loops -m64 -march=nocona -O3 -fomit-frame-pointer x64
gcc -funroll-loops -m64 -march=nocona -O -fomit-frame-pointer x64
gcc -funroll-loops -m64 -march=nocona -Os -fomit-frame-pointer x64
gcc -funroll-loops -march=barcelona -O2 -fomit-frame-pointer x64
gcc -funroll-loops -march=barcelona -O3 -fomit-frame-pointer x64
gcc -funroll-loops -march=barcelona -O -fomit-frame-pointer x64
gcc -funroll-loops -march=barcelona -Os -fomit-frame-pointer x64
gcc -funroll-loops -march=k8 -O2 -fomit-frame-pointer x64
gcc -funroll-loops -march=k8 -O3 -fomit-frame-pointer x64
gcc -funroll-loops -march=k8 -O -fomit-frame-pointer x64
gcc -funroll-loops -march=k8 -Os -fomit-frame-pointer x64
gcc -funroll-loops -march=nocona -O2 -fomit-frame-pointer x64
gcc -funroll-loops -march=nocona -O3 -fomit-frame-pointer x64
gcc -funroll-loops -march=nocona -O -fomit-frame-pointer x64
gcc -funroll-loops -march=nocona -Os -fomit-frame-pointer x64
gcc -m64 -O2 -fomit-frame-pointer x64
gcc -m64 -O3 -fomit-frame-pointer x64
gcc -m64 -O -fomit-frame-pointer x64
gcc -m64 -Os -fomit-frame-pointer x64
gcc -m64 -march=core-avx-i -O2 -fomit-frame-pointer x64
gcc -m64 -march=core-avx-i -O3 -fomit-frame-pointer x64
gcc -m64 -march=core-avx-i -O -fomit-frame-pointer x64
gcc -m64 -march=core-avx-i -Os -fomit-frame-pointer x64
gcc -m64 -march=core-avx2 -O2 -fomit-frame-pointer x64
gcc -m64 -march=core-avx2 -O3 -fomit-frame-pointer x64
gcc -m64 -march=core-avx2 -O -fomit-frame-pointer x64
gcc -m64 -march=core-avx2 -Os -fomit-frame-pointer x64
gcc -m64 -march=core2 -O2 -fomit-frame-pointer x64
gcc -m64 -march=core2 -O3 -fomit-frame-pointer x64
gcc -m64 -march=core2 -O -fomit-frame-pointer x64
gcc -m64 -march=core2 -Os -fomit-frame-pointer x64
gcc -m64 -march=core2 -msse4.1 -O2 -fomit-frame-pointer x64
gcc -m64 -march=core2 -msse4.1 -O3 -fomit-frame-pointer x64
gcc -m64 -march=core2 -msse4.1 -O -fomit-frame-pointer x64
gcc -m64 -march=core2 -msse4.1 -Os -fomit-frame-pointer x64
gcc -m64 -march=core2 -msse4 -O2 -fomit-frame-pointer x64
gcc -m64 -march=core2 -msse4 -O3 -fomit-frame-pointer x64
gcc -m64 -march=core2 -msse4 -O -fomit-frame-pointer x64
gcc -m64 -march=core2 -msse4 -Os -fomit-frame-pointer x64
gcc -m64 -march=corei7-avx -O2 -fomit-frame-pointer x64
gcc -m64 -march=corei7-avx -O3 -fomit-frame-pointer x64
gcc -m64 -march=corei7-avx -O -fomit-frame-pointer x64
gcc -m64 -march=corei7-avx -Os -fomit-frame-pointer x64
gcc -m64 -march=corei7 -O2 -fomit-frame-pointer x64
gcc -m64 -march=corei7 -O3 -fomit-frame-pointer x64
gcc -m64 -march=corei7 -O -fomit-frame-pointer x64
gcc -m64 -march=corei7 -Os -fomit-frame-pointer x64
gcc -m64 -march=k8 -O2 -fomit-frame-pointer x64
gcc -m64 -march=k8 -O3 -fomit-frame-pointer x64
gcc -m64 -march=k8 -O -fomit-frame-pointer x64
gcc -m64 -march=k8 -Os -fomit-frame-pointer x64
gcc -m64 -march=native -mtune=native -O2 -fomit-frame-pointer x64
gcc -m64 -march=native -mtune=native -O3 -fomit-frame-pointer x64
gcc -m64 -march=native -mtune=native -O -fomit-frame-pointer x64
gcc -m64 -march=native -mtune=native -Os -fomit-frame-pointer x64
gcc -m64 -march=nocona -O2 -fomit-frame-pointer x64
gcc -m64 -march=nocona -O3 -fomit-frame-pointer x64
gcc -m64 -march=nocona -O -fomit-frame-pointer x64
gcc -m64 -march=nocona -Os -fomit-frame-pointer x64
gcc -march=barcelona -O2 -fomit-frame-pointer x64
gcc -march=barcelona -O3 -fomit-frame-pointer x64
gcc -march=barcelona -O -fomit-frame-pointer x64
gcc -march=barcelona -Os -fomit-frame-pointer x64
gcc -march=k8 -O2 -fomit-frame-pointer x64
gcc -march=k8 -O3 -fomit-frame-pointer x64
gcc -march=k8 -O -fomit-frame-pointer x64
gcc -march=k8 -Os -fomit-frame-pointer x64
gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv x64
gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv x64
gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv x64
gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv x64
gcc -march=nocona -O2 -fomit-frame-pointer x64
gcc -march=nocona -O3 -fomit-frame-pointer x64
gcc -march=nocona -O -fomit-frame-pointer x64
gcc -march=nocona -Os -fomit-frame-pointer x64

Test failure

Implementation: crypto_hash/skein10241024/x64
Compiler: gcc -m64 -march=barcelona -O2 -fomit-frame-pointer
error 111
error 111

Number of similar (compiler,implementation) pairs: 4, namely:
CompilerImplementations
gcc -m64 -march=barcelona -O2 -fomit-frame-pointer x64
gcc -m64 -march=barcelona -O3 -fomit-frame-pointer x64
gcc -m64 -march=barcelona -O -fomit-frame-pointer x64
gcc -m64 -march=barcelona -Os -fomit-frame-pointer x64

Compiler output

Implementation: crypto_hash/skein10241024/x64
Compiler: cc
skein_block_x64.S: skein_block_x64.S:336:61: warning: trigraph ??) ignored, use -trigraphs to enable [-Wtrigraphs]
skein_block_x64.S: addq $LOCAL_SIZE,%rsp #get rid of locals (wipe??)
skein_block_x64.S: ^

Number of similar (compiler,implementation) pairs: 1, namely:
CompilerImplementations
cc x64

Compiler output

Implementation: crypto_hash/skein10241024/x64
Compiler: gcc
skein_block_x64.S: skein_block_x64.S:336:61: warning: trigraph ??) ignored, use -trigraphs to enable [-Wtrigraphs]
skein_block_x64.S: addq $LOCAL_SIZE,%rsp #get rid of locals (wipe??)
skein_block_x64.S:

Number of similar (compiler,implementation) pairs: 106, namely:
CompilerImplementations
gcc x64
gcc -O2 -fomit-frame-pointer x64
gcc -O3 -fomit-frame-pointer x64
gcc -O -fomit-frame-pointer x64
gcc -Os -fomit-frame-pointer x64
gcc -fno-schedule-insns -O2 -fomit-frame-pointer x64
gcc -fno-schedule-insns -O3 -fomit-frame-pointer x64
gcc -fno-schedule-insns -O -fomit-frame-pointer x64
gcc -fno-schedule-insns -Os -fomit-frame-pointer x64
gcc -funroll-loops x64
gcc -funroll-loops -O2 -fomit-frame-pointer x64
gcc -funroll-loops -O3 -fomit-frame-pointer x64
gcc -funroll-loops -O -fomit-frame-pointer x64
gcc -funroll-loops -Os -fomit-frame-pointer x64
gcc -funroll-loops -fno-schedule-insns -O2 -fomit-frame-pointer x64
gcc -funroll-loops -fno-schedule-insns -O3 -fomit-frame-pointer x64
gcc -funroll-loops -fno-schedule-insns -O -fomit-frame-pointer x64
gcc -funroll-loops -fno-schedule-insns -Os -fomit-frame-pointer x64
gcc -funroll-loops -m64 -O2 -fomit-frame-pointer x64
gcc -funroll-loops -m64 -O3 -fomit-frame-pointer x64
gcc -funroll-loops -m64 -O -fomit-frame-pointer x64
gcc -funroll-loops -m64 -Os -fomit-frame-pointer x64
gcc -funroll-loops -m64 -march=barcelona -O2 -fomit-frame-pointer x64
gcc -funroll-loops -m64 -march=barcelona -O3 -fomit-frame-pointer x64
gcc -funroll-loops -m64 -march=barcelona -O -fomit-frame-pointer x64
gcc -funroll-loops -m64 -march=barcelona -Os -fomit-frame-pointer x64
gcc -funroll-loops -m64 -march=k8 -O2 -fomit-frame-pointer x64
gcc -funroll-loops -m64 -march=k8 -O3 -fomit-frame-pointer x64
gcc -funroll-loops -m64 -march=k8 -O -fomit-frame-pointer x64
gcc -funroll-loops -m64 -march=k8 -Os -fomit-frame-pointer x64
gcc -funroll-loops -m64 -march=nocona -O2 -fomit-frame-pointer x64
gcc -funroll-loops -m64 -march=nocona -O3 -fomit-frame-pointer x64
gcc -funroll-loops -m64 -march=nocona -O -fomit-frame-pointer x64
gcc -funroll-loops -m64 -march=nocona -Os -fomit-frame-pointer x64
gcc -funroll-loops -march=barcelona -O2 -fomit-frame-pointer x64
gcc -funroll-loops -march=barcelona -O3 -fomit-frame-pointer x64
gcc -funroll-loops -march=barcelona -O -fomit-frame-pointer x64
gcc -funroll-loops -march=barcelona -Os -fomit-frame-pointer x64
gcc -funroll-loops -march=k8 -O2 -fomit-frame-pointer x64
gcc -funroll-loops -march=k8 -O3 -fomit-frame-pointer x64
gcc -funroll-loops -march=k8 -O -fomit-frame-pointer x64
gcc -funroll-loops -march=k8 -Os -fomit-frame-pointer x64
gcc -funroll-loops -march=nocona -O2 -fomit-frame-pointer x64
gcc -funroll-loops -march=nocona -O3 -fomit-frame-pointer x64
gcc -funroll-loops -march=nocona -O -fomit-frame-pointer x64
gcc -funroll-loops -march=nocona -Os -fomit-frame-pointer x64
gcc -m64 -O2 -fomit-frame-pointer x64
gcc -m64 -O3 -fomit-frame-pointer x64
gcc -m64 -O -fomit-frame-pointer x64
gcc -m64 -Os -fomit-frame-pointer x64
gcc -m64 -march=core-avx-i -O2 -fomit-frame-pointer x64
gcc -m64 -march=core-avx-i -O3 -fomit-frame-pointer x64
gcc -m64 -march=core-avx-i -O -fomit-frame-pointer x64
gcc -m64 -march=core-avx-i -Os -fomit-frame-pointer x64
gcc -m64 -march=core-avx2 -O2 -fomit-frame-pointer x64
gcc -m64 -march=core-avx2 -O3 -fomit-frame-pointer x64
gcc -m64 -march=core-avx2 -O -fomit-frame-pointer x64
gcc -m64 -march=core-avx2 -Os -fomit-frame-pointer x64
gcc -m64 -march=core2 -O2 -fomit-frame-pointer x64
gcc -m64 -march=core2 -O3 -fomit-frame-pointer x64
gcc -m64 -march=core2 -O -fomit-frame-pointer x64
gcc -m64 -march=core2 -Os -fomit-frame-pointer x64
gcc -m64 -march=core2 -msse4.1 -O2 -fomit-frame-pointer x64
gcc -m64 -march=core2 -msse4.1 -O3 -fomit-frame-pointer x64
gcc -m64 -march=core2 -msse4.1 -O -fomit-frame-pointer x64
gcc -m64 -march=core2 -msse4.1 -Os -fomit-frame-pointer x64
gcc -m64 -march=core2 -msse4 -O2 -fomit-frame-pointer x64
gcc -m64 -march=core2 -msse4 -O3 -fomit-frame-pointer x64
gcc -m64 -march=core2 -msse4 -O -fomit-frame-pointer x64
gcc -m64 -march=core2 -msse4 -Os -fomit-frame-pointer x64
gcc -m64 -march=corei7-avx -O2 -fomit-frame-pointer x64
gcc -m64 -march=corei7-avx -O3 -fomit-frame-pointer x64
gcc -m64 -march=corei7-avx -O -fomit-frame-pointer x64
gcc -m64 -march=corei7-avx -Os -fomit-frame-pointer x64
gcc -m64 -march=corei7 -O2 -fomit-frame-pointer x64
gcc -m64 -march=corei7 -O3 -fomit-frame-pointer x64
gcc -m64 -march=corei7 -O -fomit-frame-pointer x64
gcc -m64 -march=corei7 -Os -fomit-frame-pointer x64
gcc -m64 -march=k8 -O2 -fomit-frame-pointer x64
gcc -m64 -march=k8 -O3 -fomit-frame-pointer x64
gcc -m64 -march=k8 -O -fomit-frame-pointer x64
gcc -m64 -march=k8 -Os -fomit-frame-pointer x64
gcc -m64 -march=native -mtune=native -O2 -fomit-frame-pointer x64
gcc -m64 -march=native -mtune=native -O3 -fomit-frame-pointer x64
gcc -m64 -march=native -mtune=native -O -fomit-frame-pointer x64
gcc -m64 -march=native -mtune=native -Os -fomit-frame-pointer x64
gcc -m64 -march=nocona -O2 -fomit-frame-pointer x64
gcc -m64 -march=nocona -O3 -fomit-frame-pointer x64
gcc -m64 -march=nocona -O -fomit-frame-pointer x64
gcc -m64 -march=nocona -Os -fomit-frame-pointer x64
gcc -march=barcelona -O2 -fomit-frame-pointer x64
gcc -march=barcelona -O3 -fomit-frame-pointer x64
gcc -march=barcelona -O -fomit-frame-pointer x64
gcc -march=barcelona -Os -fomit-frame-pointer x64
gcc -march=k8 -O2 -fomit-frame-pointer x64
gcc -march=k8 -O3 -fomit-frame-pointer x64
gcc -march=k8 -O -fomit-frame-pointer x64
gcc -march=k8 -Os -fomit-frame-pointer x64
gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv x64
gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv x64
gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv x64
gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv x64
gcc -march=nocona -O2 -fomit-frame-pointer x64
gcc -march=nocona -O3 -fomit-frame-pointer x64
gcc -march=nocona -O -fomit-frame-pointer x64
gcc -march=nocona -Os -fomit-frame-pointer x64

Compiler output

Implementation: crypto_hash/skein10241024/x64
Compiler: gcc -m64 -march=barcelona -O2 -fomit-frame-pointer
skein_block_x64.S: skein_block_x64.S:336:61: warning: trigraph ??) ignored, use -trigraphs to enable [-Wtrigraphs]
skein_block_x64.S: addq $LOCAL_SIZE,%rsp #get rid of locals (wipe??)
skein_block_x64.S:
skein_block_x64.S: skein_block_x64.S:336:61: warning: trigraph ??) ignored, use -trigraphs to enable [-Wtrigraphs]
skein_block_x64.S: addq $LOCAL_SIZE,%rsp #get rid of locals (wipe??)
skein_block_x64.S:

Number of similar (compiler,implementation) pairs: 4, namely:
CompilerImplementations
gcc -m64 -march=barcelona -O2 -fomit-frame-pointer x64
gcc -m64 -march=barcelona -O3 -fomit-frame-pointer x64
gcc -m64 -march=barcelona -O -fomit-frame-pointer x64
gcc -m64 -march=barcelona -Os -fomit-frame-pointer x64