Implementation notes: x86, h3neo, crypto_sign/pass863

Computer: h3neo
Microarchitecture: amd64; K10 45nm (100f63)
Architecture: x86
CPU ID: AuthenticAMD-00100f63-078bfbff
SUPERCOP version: 20170105
Operation: crypto_sign
Primitive: pass863
TimeObject sizeTest sizeImplementationCompilerBenchmark dateSUPERCOP version
5838543? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentium4_-O_-fomit-frame-pointer2016111420161009
5847361? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentium4_-O2_-fomit-frame-pointer2016111420161009
5848228? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentium4_-O3_-fomit-frame-pointer2016111420161009
5883136? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=k6-2_-O3_-fomit-frame-pointer2016111420161009
5889721? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=k6-3_-O3_-fomit-frame-pointer2016111420161009
5905277? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=k6_-O3_-fomit-frame-pointer2016111420161009
6009668? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=k6_-O2_-fomit-frame-pointer2016111420161009
6011849? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=k6-3_-O2_-fomit-frame-pointer2016111420161009
6026882? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=k6-2_-O2_-fomit-frame-pointer2016111420161009
6071863? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=k8_-O2_-fomit-frame-pointer2016111420161009
6084484? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=athlon_-O2_-fomit-frame-pointer2016111420161009
6088482? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-O3_-fomit-frame-pointer2016111420161009
6092878? ? ?? ? ?ref-karatsubagcc_-m32_-march=k8_-O2_-fomit-frame-pointer2016111420161009
6096097? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=prescott_-O2_-fomit-frame-pointer2016111420161009
6096630? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=nocona_-O2_-fomit-frame-pointer2016111420161009
6096792? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentium-mmx_-O2_-fomit-frame-pointer2016111420161009
6103090? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentium_-O2_-fomit-frame-pointer2016111420161009
6118237? ? ?? ? ?ref-karatsubagcc_-m32_-march=k6_-O3_-fomit-frame-pointer2016111420161009
6127954? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentium_-O3_-fomit-frame-pointer2016111420161009
6135120? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentium-mmx_-O3_-fomit-frame-pointer2016111420161009
6145355? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=nocona_-O3_-fomit-frame-pointer2016111420161009
6146530? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=prescott_-O3_-fomit-frame-pointer2016111420161009
6161688? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentium_-O2_-fomit-frame-pointer2016111420161009
6165561? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentium-mmx_-O2_-fomit-frame-pointer2016111420161009
6176581? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentium3_-O2_-fomit-frame-pointer2016111420161009
6178847? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentium-m_-O2_-fomit-frame-pointer2016111420161009
6184214? ? ?? ? ?ref-karatsubagcc_-m32_-march=k6_-O2_-fomit-frame-pointer2016111420161009
6184908? ? ?? ? ?ref-karatsubagcc_-m32_-march=k6-2_-O3_-fomit-frame-pointer2016111420161009
6186760? ? ?? ? ?ref-karatsubagcc_-m32_-march=k6-3_-O2_-fomit-frame-pointer2016111420161009
6187687? ? ?? ? ?ref-karatsubagcc_-m32_-march=k6-3_-O3_-fomit-frame-pointer2016111420161009
6188544? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-O2_-fomit-frame-pointer2016111420161009
6197017? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentiumpro_-O2_-fomit-frame-pointer2016111420161009
6199465? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentium-mmx_-O3_-fomit-frame-pointer2016111420161009
6208043? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentium2_-O2_-fomit-frame-pointer2016111420161009
6209522? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentium_-O3_-fomit-frame-pointer2016111420161009
6220306? ? ?? ? ?ref-karatsubagcc_-m32_-march=k6-2_-O2_-fomit-frame-pointer2016111420161009
6229178? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentium-m_-O3_-fomit-frame-pointer2016111420161009
6229365? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentium3_-O3_-fomit-frame-pointer2016111420161009
6233576? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentiumpro_-O3_-fomit-frame-pointer2016111420161009
6240429? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=athlon_-O_-fomit-frame-pointer2016111420161009
6243585? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentium2_-O3_-fomit-frame-pointer2016111420161009
6266548? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=k8_-O_-fomit-frame-pointer2016111420161009
6278710? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=barcelona_-O2_-fomit-frame-pointer2016111420161009
6284893? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=k6-3_-O_-fomit-frame-pointer2016111420161009
6285759? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=i486_-O3_-fomit-frame-pointer2016111420161009
6286821? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=k6-2_-O_-fomit-frame-pointer2016111420161009
6295704? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=k6_-O_-fomit-frame-pointer2016111420161009
6315274? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=i386_-O3_-fomit-frame-pointer2016111420161009
6322890? ? ?? ? ?ref-karatsubagcc_-m32_-march=prescott_-O3_-fomit-frame-pointer2016111420161009
6324592? ? ?? ? ?ref-karatsubagcc_-m32_-march=nocona_-O3_-fomit-frame-pointer2016111420161009
6330202? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=i486_-O2_-fomit-frame-pointer2016111420161009
6332917? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=i386_-O2_-fomit-frame-pointer2016111420161009
6372662? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentium-m_-O_-fomit-frame-pointer2016111420161009
6376594? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentium3_-O_-fomit-frame-pointer2016111420161009
6379583? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentium2_-O_-fomit-frame-pointer2016111420161009
6385599? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentiumpro_-O_-fomit-frame-pointer2016111420161009
6404924? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=k8_-O3_-fomit-frame-pointer2016111420161009
6419576? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=barcelona_-O_-fomit-frame-pointer2016111420161009
6423362? ? ?? ? ?ref-karatsubagcc_-m32_-march=k8_-O3_-fomit-frame-pointer2016111420161009
6425607? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentium_-O_-fomit-frame-pointer2016111420161009
6426503? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentium-mmx_-O_-fomit-frame-pointer2016111420161009
6438636? ? ?? ? ?ref-karatsubagcc_-m32_-march=i386_-O2_-fomit-frame-pointer2016111420161009
6448640? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentium-m_-O3_-fomit-frame-pointer2016111420161009
6455999? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentium2_-O3_-fomit-frame-pointer2016111420161009
6460796? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentium3_-O3_-fomit-frame-pointer2016111420161009
6463315? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentiumpro_-O3_-fomit-frame-pointer2016111420161009
6483686? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentium-m_-O2_-fomit-frame-pointer2016111420161009
6484604? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentium2_-O2_-fomit-frame-pointer2016111420161009
6485088? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentium3_-O2_-fomit-frame-pointer2016111420161009
6485659? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentiumpro_-O2_-fomit-frame-pointer2016111420161009
6488554? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=nocona_-O_-fomit-frame-pointer2016111420161009
6492155? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=prescott_-O_-fomit-frame-pointer2016111420161009
6511406? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentium4_-O_-fomit-frame-pointer2016111420161009
6521986? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentium-mmx_-O_-fomit-frame-pointer2016111420161009
6528031? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=barcelona_-O3_-fomit-frame-pointer2016111420161009
6528080? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-O_-fomit-frame-pointer2016111420161009
6532864? ? ?? ? ?ref-karatsubagcc_-m32_-march=barcelona_-O3_-fomit-frame-pointer2016111420161009
6535161? ? ?? ? ?ref-karatsubagcc_-m32_-march=native_-mtune=native_-O3_-fomit-frame-pointer2016111420161009
6536121? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentium_-O_-fomit-frame-pointer2016111420161009
6586353? ? ?? ? ?ref-karatsubagcc_-m32_-march=native_-mtune=native_-O2_-fomit-frame-pointer2016111420161009
6602079? ? ?? ? ?ref-karatsubagcc_-m32_-march=barcelona_-O2_-fomit-frame-pointer2016111420161009
6625015? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=athlon_-O3_-fomit-frame-pointer2016111420161009
6631702? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=i486_-O_-fomit-frame-pointer2016111420161009
6650363? ? ?? ? ?ref-karatsubagcc_-m32_-march=barcelona_-O_-fomit-frame-pointer2016111420161009
6650454? ? ?? ? ?ref-karatsubagcc_-m32_-march=native_-mtune=native_-O_-fomit-frame-pointer2016111420161009
6661416? ? ?? ? ?ref-karatsubagcc_-m32_-march=athlon_-O3_-fomit-frame-pointer2016111420161009
6674357? ? ?? ? ?ref-karatsubagcc_-m32_-march=corei7_-O_-fomit-frame-pointer2016111420161009
6692033? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentium4_-O3_-fomit-frame-pointer2016111420161009
6699239? ? ?? ? ?ref-karatsubagcc_-m32_-march=athlon_-O2_-fomit-frame-pointer2016111420161009
6721403? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=i386_-O_-fomit-frame-pointer2016111420161009
6732229? ? ?? ? ?ref-karatsubagcc_-m32_-O_-fomit-frame-pointer2016111420161009
6734344? ? ?? ? ?ref-karatsubagcc_-m32_-march=core2_-msse4_-O2_-fomit-frame-pointer2016111420161009
6741614? ? ?? ? ?ref-karatsubagcc_-m32_-O3_-fomit-frame-pointer2016111420161009
6747135? ? ?? ? ?ref-karatsubagcc_-m32_-march=core2_-O2_-fomit-frame-pointer2016111420161009
6748949? ? ?? ? ?ref-karatsubagcc_-m32_-march=core2_-msse4.1_-O2_-fomit-frame-pointer2016111420161009
6755283? ? ?? ? ?ref-karatsubagcc_-m32_-march=corei7_-O2_-fomit-frame-pointer2016111420161009
6796787? ? ?? ? ?ref-karatsubagcc_-m32_-O2_-fomit-frame-pointer2016111420161009
6844831? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentium2_-O_-fomit-frame-pointer2016111420161009
6857339? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentium3_-O_-fomit-frame-pointer2016111420161009
6861185? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentium-m_-O_-fomit-frame-pointer2016111420161009
6877907? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentiumpro_-O_-fomit-frame-pointer2016111420161009
6929237? ? ?? ? ?ref-karatsubagcc_-m32_-march=k6_-O_-fomit-frame-pointer2016111420161009
6933035? ? ?? ? ?ref-karatsubagcc_-m32_-march=k6-3_-O_-fomit-frame-pointer2016111420161009
6991423? ? ?? ? ?ref-karatsubagcc_-m32_-march=k6-2_-O_-fomit-frame-pointer2016111420161009
7051433? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentium4_-O2_-fomit-frame-pointer2016111420161009
7054503? ? ?? ? ?ref-karatsubagcc_-m32_-march=nocona_-O2_-fomit-frame-pointer2016111420161009
7064225? ? ?? ? ?ref-karatsubagcc_-m32_-march=core2_-O_-fomit-frame-pointer2016111420161009
7067364? ? ?? ? ?ref-karatsubagcc_-m32_-march=core2_-msse4_-O_-fomit-frame-pointer2016111420161009
7074125? ? ?? ? ?ref-karatsubagcc_-m32_-march=core2_-msse4.1_-O_-fomit-frame-pointer2016111420161009
7084174? ? ?? ? ?ref-karatsubagcc_-m32_-march=prescott_-O2_-fomit-frame-pointer2016111420161009
7102966? ? ?? ? ?ref-karatsubagcc_-m32_-march=i486_-O3_-fomit-frame-pointer2016111420161009
7151317? ? ?? ? ?ref-karatsubagcc_-m32_-march=i486_-O2_-fomit-frame-pointer2016111420161009
7231069? ? ?? ? ?ref-karatsubagcc_-m32_-march=i386_-O3_-fomit-frame-pointer2016111420161009
7469459? ? ?? ? ?ref-karatsubagcc_-m32_-march=i486_-O_-fomit-frame-pointer2016111420161009
7565680? ? ?? ? ?ref-karatsubagcc_-m32_-march=i386_-O_-fomit-frame-pointer2016111420161009
7913607? ? ?? ? ?ref-karatsubagcc_-m32_-march=k8_-O_-fomit-frame-pointer2016111420161009
7914665? ? ?? ? ?ref-karatsubagcc_-m32_-march=athlon_-O_-fomit-frame-pointer2016111420161009
7917665? ? ?? ? ?ref-karatsubagcc_-m32_-march=nocona_-O_-fomit-frame-pointer2016111420161009
7917735? ? ?? ? ?ref-karatsubagcc_-m32_-march=prescott_-O_-fomit-frame-pointer2016111420161009
11311883? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=k6_-Os_-fomit-frame-pointer2016111420161009
11378304? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=k6-2_-Os_-fomit-frame-pointer2016111420161009
11390044? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=k6-3_-Os_-fomit-frame-pointer2016111420161009
11393848? ? ?? ? ?ref-karatsubagcc_-m32_-march=k6-2_-Os_-fomit-frame-pointer2016111420161009
11418961? ? ?? ? ?ref-karatsubagcc_-m32_-march=k6_-Os_-fomit-frame-pointer2016111420161009
11471138? ? ?? ? ?ref-karatsubagcc_-m32_-march=k6-3_-Os_-fomit-frame-pointer2016111420161009
12428744? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentium-mmx_-Os_-fomit-frame-pointer2016111420161009
12436509? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentium_-Os_-fomit-frame-pointer2016111420161009
12448878? ? ?? ? ?ref-karatsubagcc_-m32_-march=i386_-Os_-fomit-frame-pointer2016111420161009
12583757? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentium3_-Os_-fomit-frame-pointer2016111420161009
12613088? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentium-m_-Os_-fomit-frame-pointer2016111420161009
13173507? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentium4_-Os_-fomit-frame-pointer2016111420161009
13276733? ? ?? ? ?ref-karatsubagcc_-m32_-march=nocona_-Os_-fomit-frame-pointer2016111420161009
13291967? ? ?? ? ?ref-karatsubagcc_-m32_-march=prescott_-Os_-fomit-frame-pointer2016111420161009
13525839? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentium2_-Os_-fomit-frame-pointer2016111420161009
13528427? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentiumpro_-Os_-fomit-frame-pointer2016111420161009
13592675? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentium-mmx_-Os_-fomit-frame-pointer2016111420161009
13641701? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=prescott_-Os_-fomit-frame-pointer2016111420161009
13643324? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentium_-Os_-fomit-frame-pointer2016111420161009
13691871? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentium4_-Os_-fomit-frame-pointer2016111420161009
13700738? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=nocona_-Os_-fomit-frame-pointer2016111420161009
13869429? ? ?? ? ?ref-karatsubagcc_-m32_-march=i486_-Os_-fomit-frame-pointer2016111420161009
14051821? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=i486_-Os_-fomit-frame-pointer2016111420161009
14073999? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=k8_-Os_-fomit-frame-pointer2016111420161009
14091254? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-Os_-fomit-frame-pointer2016111420161009
14096257? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=barcelona_-Os_-fomit-frame-pointer2016111420161009
14096802? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentiumpro_-Os_-fomit-frame-pointer2016111420161009
14103512? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=athlon_-Os_-fomit-frame-pointer2016111420161009
14106666? ? ?? ? ?ref-karatsubagcc_-m32_-march=pentium2_-Os_-fomit-frame-pointer2016111420161009
14131413? ? ?? ? ?ref-karatsubagcc_-m32_-march=athlon_-Os_-fomit-frame-pointer2016111420161009
14181914? ? ?? ? ?ref-karatsubagcc_-m32_-Os_-fomit-frame-pointer2016111420161009
14182780? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentium-m_-Os_-fomit-frame-pointer2016111420161009
14186267? ? ?? ? ?ref-karatsubagcc_-m32_-march=core2_-Os_-fomit-frame-pointer2016111420161009
14205999? ? ?? ? ?ref-karatsubagcc_-m32_-march=corei7_-Os_-fomit-frame-pointer2016111420161009
14223797? ? ?? ? ?ref-karatsubagcc_-m32_-march=barcelona_-Os_-fomit-frame-pointer2016111420161009
14225271? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=pentium3_-Os_-fomit-frame-pointer2016111420161009
14238344? ? ?? ? ?ref-karatsubagcc_-m32_-march=core2_-msse4_-Os_-fomit-frame-pointer2016111420161009
14288851? ? ?? ? ?ref-karatsubagcc_-funroll-loops_-m32_-march=i386_-Os_-fomit-frame-pointer2016111420161009
14308167? ? ?? ? ?ref-karatsubagcc_-m32_-march=native_-mtune=native_-Os_-fomit-frame-pointer2016111420161009
14345682? ? ?? ? ?ref-karatsubagcc_-m32_-march=core2_-msse4.1_-Os_-fomit-frame-pointer2016111420161009
14346783? ? ?? ? ?ref-karatsubagcc_-m32_-march=k8_-Os_-fomit-frame-pointer2016111420161009

Test failure

Implementation: ref-karatsuba
Security model: unknown
Compiler: gcc -m32 -march=core-avx-i -O2 -fomit-frame-pointer
error 111

Number of similar (compiler,implementation) pairs: 10, namely:
CompilerImplementations
gcc -m32 -march=core-avx-i -O2 -fomit-frame-pointer ref-karatsuba
gcc -m32 -march=core-avx-i -O -fomit-frame-pointer ref-karatsuba
gcc -m32 -march=core-avx-i -Os -fomit-frame-pointer ref-karatsuba
gcc -m32 -march=core-avx2 -O2 -fomit-frame-pointer ref-karatsuba
gcc -m32 -march=core-avx2 -O -fomit-frame-pointer ref-karatsuba
gcc -m32 -march=core-avx2 -Os -fomit-frame-pointer ref-karatsuba
gcc -m32 -march=core2 -O3 -fomit-frame-pointer ref-karatsuba
gcc -m32 -march=corei7-avx -O2 -fomit-frame-pointer ref-karatsuba
gcc -m32 -march=corei7-avx -O -fomit-frame-pointer ref-karatsuba
gcc -m32 -march=corei7-avx -Os -fomit-frame-pointer ref-karatsuba