Implementation notes: x86, thoth, crypto_hash/keccakc512

Computer: thoth
Architecture: x86
CPU ID: AuthenticAMD-00000622-0183f9ff
SUPERCOP version: 20160806
Operation: crypto_hash
Primitive: keccakc512

Time	Implementation	Compiler	Benchmark date	SUPERCOP version
56397	`mmxu1`	`gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv`	20160726	20160724
59130	`mmxu1`	`gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv`	20160726	20160724
60119	`mmxu1`	`gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv`	20160726	20160724
62135	`mmxu1`	`gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv`	20160726	20160724
73289	`opt32bi-s2lcu4`	`gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv`	20160726	20160724
74472	`simple32bi`	`gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv`	20160726	20160724
75151	`opt32bi-s2lcu4`	`clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments`	20160726	20160724
75510	`opt32bi-rvku2`	`gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv`	20160726	20160724
75738	`inplace32bi`	`gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv`	20160726	20160724
76555	`opt32biT-s2lcu4`	`clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments`	20160726	20160724
77031	`opt32biT-s2lcu4`	`gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv`	20160726	20160724
77222	`simple32bi`	`clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments`	20160726	20160724
78198	`opt32biT-s2lcu4`	`gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv`	20160726	20160724
79785	`opt32bi-rvku2`	`clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments`	20160726	20160724
80327	`opt32bi-s2lcu4`	`gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv`	20160726	20160724
80468	`opt32bi-rvku2`	`gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv`	20160726	20160724
81031	`opt32bi-s2lcu4`	`gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv`	20160726	20160724
81083	`simple32bi`	`gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv`	20160726	20160724
81810	`opt32biT-s2lcu4`	`gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv`	20160726	20160724
82861	`simple32bi`	`gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv`	20160726	20160724
84155	`inplace32bi`	`gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv`	20160726	20160724
84298	`inplace32bi`	`gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv`	20160726	20160724
84577	`sphlib`	`clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments`	20160726	20160724
84622	`opt32bi-s2lcu4`	`gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv`	20160726	20160724
84636	`inplace32bi`	`gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv`	20160726	20160724
85185	`opt32biT-s2lcu4`	`gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv`	20160726	20160724
85572	`opt32bi-rvku2`	`gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv`	20160726	20160724
87836	`sphlib-small`	`clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments`	20160726	20160724
89608	`opt32bi-rvku2`	`gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv`	20160726	20160724
91129	`simple32bi`	`gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv`	20160726	20160724
92459	`sphlib`	`gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv`	20160726	20160724
93038	`sphlib-small`	`gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv`	20160726	20160724
93204	`sphlib`	`gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv`	20160726	20160724
93547	`sphlib-small`	`gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv`	20160726	20160724
94077	`sphlib`	`gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv`	20160726	20160724
94865	`opt64lcu6`	`clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments`	20160726	20160724
96588	`sphlib-small`	`gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv`	20160726	20160724
101160	`opt64u6`	`clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments`	20160726	20160724
101428	`simple`	`clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments`	20160726	20160724
106257	`sphlib`	`gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv`	20160726	20160724
106402	`sphlib-small`	`gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv`	20160726	20160724
106404	`inplace`	`clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments`	20160726	20160724
121689	`opt64lcu24`	`gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv`	20160726	20160724
129810	`opt64lcu24`	`gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv`	20160726	20160724
130083	`opt64lcu24`	`gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv`	20160726	20160724
135297	`opt64lcu24`	`gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv`	20160726	20160724
135839	`opt64lcu6`	`gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv`	20160726	20160724
136425	`simple`	`gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv`	20160726	20160724
137310	`inplace`	`gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv`	20160726	20160724
138787	`opt64u6`	`gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv`	20160726	20160724
141978	`inplace`	`gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv`	20160726	20160724
142047	`inplace`	`gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv`	20160726	20160724
142917	`inplace32bi`	`clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments`	20160726	20160724
145352	`inplace`	`gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv`	20160726	20160724
145534	`opt64lcu6`	`gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv`	20160726	20160724
146321	`simple`	`gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv`	20160726	20160724
149019	`opt64lcu6`	`gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv`	20160726	20160724
150536	`simple`	`gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv`	20160726	20160724
150555	`opt64lcu6`	`gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv`	20160726	20160724
150641	`opt64u6`	`gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv`	20160726	20160724
152241	`opt64u6`	`gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv`	20160726	20160724
153291	`simple`	`gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv`	20160726	20160724
154426	`opt64u6`	`gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv`	20160726	20160724
154617	`opt64lcu24`	`clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments`	20160726	20160724
248400	`compact`	`gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv`	20160726	20160724
263696	`compact`	`clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments`	20160726	20160724
342513	`mmxu1`	`clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments`	20160726	20160724
348930	`compact`	`gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv`	20160726	20160724
358721	`compact`	`gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv`	20160726	20160724
369264	`compact`	`gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv`	20160726	20160724
502176	`compact8`	`clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments`	20160726	20160724
503341	`compact8`	`gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv`	20160726	20160724
595654	`compact8`	`gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv`	20160726	20160724
660319	`compact8`	`gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv`	20160726	20160724
672664	`compact8`	`gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv`	20160726	20160724

Checksum failure

Implementation: crypto_hash/keccakc512/opt64lcu24shld
Compiler: clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments

025c47113c7aef56cd4b370d3cc96a8324fa4dedfe7fe5c89296200e47ff97cb

Number of similar (compiler,implementation) pairs: 5, namely:

Compiler	Implementations
clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments	opt64lcu24shld
gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv	opt64lcu24shld
gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv	opt64lcu24shld
gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv	opt64lcu24shld
gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv	opt64lcu24shld

Checksum failure

Implementation: crypto_hash/keccakc512/gil/singlefile
Compiler: clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments

ebbed3a47232047ad399cb77b6324d6c902f4715de871750545b1a3b12046ebe

Number of similar (compiler,implementation) pairs: 10, namely:

Compiler	Implementations
clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments	gil/singlefile gil/singlefile_unrolled
gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv	gil/singlefile gil/singlefile_unrolled
gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv	gil/singlefile gil/singlefile_unrolled
gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv	gil/singlefile gil/singlefile_unrolled
gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv	gil/singlefile gil/singlefile_unrolled

Compiler output

Implementation: crypto_hash/keccakc512/sseu2
Compiler: clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments

KeccakF-1600-opt64.c: KeccakF-1600-opt64.c:184:5: error: always_inline function '_mm_load_si128' requires target feature 'sse2', but would be inlined into function 'KeccakPermutationOnWords' that is compiled without support for 'sse2'
KeccakF-1600-opt64.c: copyFromState(A, state)
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: ./KeccakF-1600-simd128.macros:547:19: note: expanded from macro 'copyFromState'
KeccakF-1600-opt64.c: X##bae.v128 = LOAD128(state[ 0]); \
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: KeccakF-1600-opt64.c:51:33: note: expanded from macro 'LOAD128'
KeccakF-1600-opt64.c: #define LOAD128(a) _mm_load_si128((const V128 *)&(a))
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: KeccakF-1600-opt64.c:184:5: error: always_inline function '_mm_unpackhi_epi64' requires target feature 'sse2', but would be inlined into function 'KeccakPermutationOnWords' that is compiled without support for 'sse2'
KeccakF-1600-opt64.c: ./KeccakF-1600-simd128.macros:549:13: note: expanded from macro 'copyFromState'
KeccakF-1600-opt64.c: X##be = GET64HIHI(X##bae.v128, X##bae.v128); \
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: KeccakF-1600-opt64.c:58:33: note: expanded from macro 'GET64HIHI'
KeccakF-1600-opt64.c: #define GET64HIHI(a, b) _mm_unpackhi_epi64(a, b)
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: KeccakF-1600-opt64.c:184:5: error: always_inline function '_mm_load_si128' requires target feature 'sse2', but would be inlined into function 'KeccakPermutationOnWords' that is compiled without support for 'sse2'
KeccakF-1600-opt64.c: ./KeccakF-1600-simd128.macros:551:19: note: expanded from macro 'copyFromState'
KeccakF-1600-opt64.c: X##bio.v128 = LOAD128(state[ 2]); \
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: KeccakF-1600-opt64.c:51:33: note: expanded from macro 'LOAD128'
KeccakF-1600-opt64.c: #define LOAD128(a) _mm_load_si128((const V128 *)&(a))
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: KeccakF-1600-opt64.c:184:5: error: always_inline function '_mm_unpackhi_epi64' requires target feature 'sse2', but would be inlined into function 'KeccakPermutationOnWords' that is compiled without support for 'sse2'
KeccakF-1600-opt64.c: ./KeccakF-1600-simd128.macros:553:13: note: expanded from macro 'copyFromState'
KeccakF-1600-opt64.c: ...

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

Compiler	Implementations
clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments	sseu2

Compiler output

Implementation: crypto_hash/keccakc512/xopu24
Compiler: clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments

KeccakF-1600-opt64.c: KeccakF-1600-opt64.c:184:5: error: always_inline function '_mm_load_si128' requires target feature 'sse2', but would be inlined into function 'KeccakPermutationOnWords' that is compiled without support for 'sse2'
KeccakF-1600-opt64.c: copyFromState(A, state)
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: ./KeccakF-1600-xop.macros:482:14: note: expanded from macro 'copyFromState'
KeccakF-1600-opt64.c: X##bae = LOAD128(state[ 0]); \
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: KeccakF-1600-opt64.c:87:33: note: expanded from macro 'LOAD128'
KeccakF-1600-opt64.c: #define LOAD128(a) _mm_load_si128((const V128 *)&(a))
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: KeccakF-1600-opt64.c:184:5: error: always_inline function '_mm_unpackhi_epi64' requires target feature 'sse2', but would be inlined into function 'KeccakPermutationOnWords' that is compiled without support for 'sse2'
KeccakF-1600-opt64.c: ./KeccakF-1600-xop.macros:484:13: note: expanded from macro 'copyFromState'
KeccakF-1600-opt64.c: X##be = GET64HIHI(X##bae, X##bae); \
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: KeccakF-1600-opt64.c:96:33: note: expanded from macro 'GET64HIHI'
KeccakF-1600-opt64.c: #define GET64HIHI(a, b) _mm_unpackhi_epi64(a, b)
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: KeccakF-1600-opt64.c:184:5: error: always_inline function '_mm_load_si128' requires target feature 'sse2', but would be inlined into function 'KeccakPermutationOnWords' that is compiled without support for 'sse2'
KeccakF-1600-opt64.c: ./KeccakF-1600-xop.macros:486:14: note: expanded from macro 'copyFromState'
KeccakF-1600-opt64.c: X##bio = LOAD128(state[ 2]); \
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: KeccakF-1600-opt64.c:87:33: note: expanded from macro 'LOAD128'
KeccakF-1600-opt64.c: #define LOAD128(a) _mm_load_si128((const V128 *)&(a))
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: KeccakF-1600-opt64.c:184:5: error: always_inline function '_mm_unpackhi_epi64' requires target feature 'sse2', but would be inlined into function 'KeccakPermutationOnWords' that is compiled without support for 'sse2'
KeccakF-1600-opt64.c: ./KeccakF-1600-xop.macros:488:13: note: expanded from macro 'copyFromState'
KeccakF-1600-opt64.c: ...

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

Compiler	Implementations
clang -march=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments	xopu24

Compiler output

Implementation: crypto_hash/keccakc512/xopu24
Compiler: gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv

KeccakF-1600-opt64.c: In file included from KeccakF-1600-opt64.c:130:0:
KeccakF-1600-opt64.c: KeccakF-1600-opt64.c: In function 'KeccakPermutationOnWords':
KeccakF-1600-opt64.c: KeccakF-1600-xop.macros:482:12: warning: SSE vector return without SSE enabled changes the ABI [-Wpsabi]
KeccakF-1600-opt64.c: X##bae = LOAD128(state[ 0]); \
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: KeccakF-1600-opt64.c:184:5: note: in expansion of macro 'copyFromState'
KeccakF-1600-opt64.c: copyFromState(A, state)
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: In file included from /usr/lib/gcc/i686-linux-gnu/5/include/xmmintrin.h:1249:0,
KeccakF-1600-opt64.c: from /usr/lib/gcc/i686-linux-gnu/5/include/x86intrin.h:31,
KeccakF-1600-opt64.c: from KeccakF-1600-opt64.c:74:
KeccakF-1600-opt64.c: /usr/lib/gcc/i686-linux-gnu/5/include/emmintrin.h:720:1: error: inlining failed in call to always_inline '_mm_storel_epi64': target specific option mismatch
KeccakF-1600-opt64.c: _mm_storel_epi64 (__m128i *__P, __m128i __B)
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: KeccakF-1600-opt64.c:80:33: error: called from here
KeccakF-1600-opt64.c: #define STORE64(a, b) _mm_storel_epi64((V64 *)&(a), b)
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: KeccakF-1600-xop.macros:557:5: note: in expansion of macro 'STORE64'
KeccakF-1600-opt64.c: STORE64(state[24], X##su); \
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: KeccakF-1600-unrolling.macros:41:5: note: in expansion of macro 'copyToState'
KeccakF-1600-opt64.c: copyToState(state, A)
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: KeccakF-1600-opt64.c:185:5: note: in expansion of macro 'rounds'
KeccakF-1600-opt64.c: rounds
KeccakF-1600-opt64.c: ...

Number of similar (compiler,implementation) pairs: 4, namely:

Compiler	Implementations
gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv	xopu24
gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv	xopu24
gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv	xopu24
gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv	xopu24

Compiler output

Implementation: crypto_hash/keccakc512/sseu2
Compiler: gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv

KeccakF-1600-opt64.c: In file included from KeccakF-1600-opt64.c:67:0:
KeccakF-1600-opt64.c: KeccakF-1600-opt64.c: In function 'KeccakPermutationOnWords':
KeccakF-1600-opt64.c: KeccakF-1600-simd128.macros:547:17: warning: SSE vector return without SSE enabled changes the ABI [-Wpsabi]
KeccakF-1600-opt64.c: X##bae.v128 = LOAD128(state[ 0]); \
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: KeccakF-1600-opt64.c:184:5: note: in expansion of macro 'copyFromState'
KeccakF-1600-opt64.c: copyFromState(A, state)
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: In file included from /usr/lib/gcc/i686-linux-gnu/5/include/xmmintrin.h:1249:0,
KeccakF-1600-opt64.c: from /usr/lib/gcc/i686-linux-gnu/5/include/x86intrin.h:31,
KeccakF-1600-opt64.c: from KeccakF-1600-opt64.c:31:
KeccakF-1600-opt64.c: /usr/lib/gcc/i686-linux-gnu/5/include/emmintrin.h:1286:1: error: inlining failed in call to always_inline '_mm_xor_si128': target specific option mismatch
KeccakF-1600-opt64.c: _mm_xor_si128 (__m128i __A, __m128i __B)
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: KeccakF-1600-opt64.c:45:35: error: called from here
KeccakF-1600-opt64.c: #define XOReq64(a, b) a = _mm_xor_si128(a, b)
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: KeccakF-1600-simd128.macros:600:5: note: in expansion of macro 'XOReq64'
KeccakF-1600-opt64.c: XOReq64(Cu, X##su); \
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: KeccakF-1600-opt64.c:184:5: note: in expansion of macro 'copyFromState'
KeccakF-1600-opt64.c: copyFromState(A, state)
KeccakF-1600-opt64.c: ^
KeccakF-1600-opt64.c: In file included from /usr/lib/gcc/i686-linux-gnu/5/include/xmmintrin.h:1249:0,
KeccakF-1600-opt64.c: from /usr/lib/gcc/i686-linux-gnu/5/include/x86intrin.h:31,
KeccakF-1600-opt64.c: ...

Number of similar (compiler,implementation) pairs: 4, namely:

Compiler	Implementations
gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv	sseu2
gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv	sseu2
gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv	sseu2
gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv	sseu2