Implementation notes: mipso32, gcc23, crypto_hash/keccakc768

Computer: gcc23
Microarchitecture: mipso32; Octeon II (cnmips64v2)
Architecture: mipso32
CPU ID: unknown CPU ID
SUPERCOP version: 20230530
Operation: crypto_hash
Primitive: keccakc768

Time	Object size	Test size	Implementation	Compiler	Benchmark date	SUPERCOP version
202066	26032 0 0	43464 396 760	`T:opt32bi-s2lcu4`	`gcc_-march=native_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
203530	16448 0 0	33769 388 760	`T:opt32bi-rvku2`	`gcc_-march=native_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
205594	5504 0 0	20556 328 760	`T:simple32bi`	`gcc_-march=native_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
220744	8880 0 0	23933 328 760	`T:inplace32bi`	`gcc_-march=native_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
222056	45056 0 0	62522 392 760	`T:opt64lcu6`	`gcc_-march=native_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
232384	25680 0 16	43276 428 262920	`T:opt32biT-s2lcu4`	`gcc_-march=native_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
234756	10624 0 0	25666 328 760	`T:inplace`	`gcc_-march=native_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
235468	47856 0 0	65304 392 760	`T:opt64u6`	`gcc_-march=native_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
238938	6080 0 0	21118 328 760	`T:simple`	`gcc_-march=native_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
318466	37408 0 0	57287 392 760	`T:opt32bi-s2lcu4`	`gcc_-march=native_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
318814	36800 0 0	54672 400 760	`T:opt32bi-s2lcu4`	`gcc_-march=native_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
353572	37216 0 16	57202 420 262920	`T:opt32biT-s2lcu4`	`gcc_-march=native_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
353960	45168 0 0	63622 392 760	`T:opt64lcu6`	`gcc_-march=native_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
356714	26560 0 0	45172 404 760	`T:opt32bi-s2lcu4`	`gcc_-march=native_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
359004	16704 0 0	35205 396 760	`T:opt32bi-rvku2`	`gcc_-march=native_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
360330	36496 0 16	54540 432 262920	`T:opt32biT-s2lcu4`	`gcc_-march=native_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
362798	5680 0 0	21912 336 760	`T:simple32bi`	`gcc_-march=native_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
365420	47984 0 0	66420 392 760	`T:opt64u6`	`gcc_-march=native_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
370582	10736 0 0	26958 336 760	`T:inplace`	`gcc_-march=native_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
372562	6240 0 0	22458 336 760	`T:simple`	`gcc_-march=native_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
385658	8944 0 0	25177 336 760	`T:inplace32bi`	`gcc_-march=native_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
396214	26224 0 16	45000 436 262920	`T:opt32biT-s2lcu4`	`gcc_-march=native_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
404174	13648 0 0	29193 336 760	`T:inplace32bi`	`gcc_-march=native_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
415744	13904 0 0	31490 332 760	`T:inplace32bi`	`gcc_-march=native_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
450876	24896 0 0	44664 384 760	`T:opt32bi-rvku2`	`gcc_-march=native_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
451080	24256 0 0	42017 392 760	`T:opt32bi-rvku2`	`gcc_-march=native_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
459584	15328 0 0	32883 328 760	`T:simple32bi`	`gcc_-march=native_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
459710	7968 0 0	23512 336 760	`T:simple32bi`	`gcc_-march=native_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
472816	72448 0 0	90214 396 760	`T:opt64lcu6`	`gcc_-march=native_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
472836	72656 0 0	92468 392 760	`T:opt64lcu6`	`gcc_-march=native_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
527000	80544 0 0	98292 396 760	`T:opt64u6`	`gcc_-march=native_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
527176	80768 0 0	100562 392 760	`T:opt64u6`	`gcc_-march=native_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
576006	36624 0 0	54208 332 760	`T:inplace`	`gcc_-march=native_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
578968	18528 0 0	34062 336 760	`T:inplace`	`gcc_-march=native_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
608276	156640 0 0	174059 396 760	`T:opt64lcu24`	`gcc_-march=native_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
620032	20320 0 0	37900 332 760	`T:simple`	`gcc_-march=native_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
623616	10384 0 0	25914 336 760	`T:simple`	`gcc_-march=native_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
628122	6160 0 0	23861 344 760	`T:compact`	`gcc_-march=native_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
673132	156656 0 0	175063 396 760	`T:opt64lcu24`	`gcc_-march=native_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
986150	2720 0 0	18371 348 760	`T:compact`	`gcc_-march=native_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
1112638	265152 0 0	282871 404 760	`T:opt64lcu24`	`gcc_-march=native_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
1114692	265360 0 0	285125 400 760	`T:opt64lcu24`	`gcc_-march=native_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
1257612	2384 192 0	17928 532 760	`T:compact8`	`gcc_-march=native_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
1307938	5072 192 0	22668 528 760	`T:compact8`	`gcc_-march=native_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
1704630	2992 0 0	19331 348 760	`T:compact`	`gcc_-march=native_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
1870212	2320 192 0	18641 544 760	`T:compact8`	`gcc_-march=native_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
2080228	2272 192 0	17605 544 760	`T:compact8`	`gcc_-march=native_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506
2285660	2656 0 0	18007 348 760	`T:compact`	`gcc_-march=native_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20220531	20220506

Namespace violations

Implementation: T:compact
Security model: timingleaks
Compiler: gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE

Keccak-compact.o Final T
Keccak-compact.o Init T
Keccak-compact.o KeccakF T
Keccak-compact.o KeccakF_Mod5 R
Keccak-compact.o KeccakF_PiLane R
Keccak-compact.o KeccakF_RotationConstants R
Keccak-compact.o KeccakF_RoundConstants R
Keccak-compact.o Update T

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

Compiler	Implementations
gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:compact
gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:compact
gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:compact
gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:compact

Namespace violations

Implementation: T:compact8
Security model: timingleaks
Compiler: gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE

Keccak-compact8.o Final T
Keccak-compact8.o Init T
Keccak-compact8.o KeccakF T
Keccak-compact8.o Update T
Keccak-compact8.o rotate64_1bit_left T
Keccak-compact8.o rotate64left T
Keccak-compact8.o xorBytes T
Keccak-compact8.o xorLanes T

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

Compiler	Implementations
gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:compact8
gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:compact8
gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:compact8
gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:compact8

Namespace violations

Implementation: T:inplace
Security model: timingleaks
Compiler: gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE

Keccak-inplace.o KeccakF T
Keccak-inplace.o KeccakF1600RoundConstants R

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

Compiler	Implementations
gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:inplace
gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:inplace
gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:inplace
gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:inplace

Namespace violations

Implementation: T:inplace32bi
Security model: timingleaks
Compiler: gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE

Keccak-inplace32BI.o KeccakF T
Keccak-inplace32BI.o extractFromState T

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

Compiler	Implementations
gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:inplace32bi
gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:inplace32bi
gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:inplace32bi
gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:inplace32bi

Namespace violations

Implementation: T:opt32bi-rvku2
Security model: timingleaks
Compiler: gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE

KeccakF-1600-opt32.o KeccakAbsorb T
KeccakF-1600-opt32.o KeccakAbsorb832bits T
KeccakF-1600-opt32.o KeccakExtract T
KeccakF-1600-opt32.o KeccakInitialize T
KeccakF-1600-opt32.o KeccakInitializeState T
KeccakF-1600-opt32.o KeccakPermutation T
KeccakF-1600-opt32.o KeccakPermutationOnWords T
KeccakF-1600-opt32.o KeccakPermutationOnWordsAfterXoring T
KeccakF-1600-opt32.o KeccakPermutationOnWordsAfterXoring832bits T
KeccakF-1600-opt32.o fromInterleaving T
KeccakF-1600-opt32.o setInterleavedWordsInto8bytes T
KeccakSponge.o Absorb T
KeccakSponge.o AbsorbQueue T
KeccakSponge.o InitSponge T
KeccakSponge.o PadAndSwitchToSqueezingPhase T
KeccakSponge.o Squeeze T

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

Compiler	Implementations
gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:opt32bi-rvku2
gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:opt32bi-rvku2
gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:opt32bi-rvku2
gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:opt32bi-rvku2

Namespace violations

Implementation: T:opt32bi-s2lcu4
Security model: timingleaks
Compiler: gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE

KeccakF-1600-opt32.o KeccakAbsorb T
KeccakF-1600-opt32.o KeccakAbsorb832bits T
KeccakF-1600-opt32.o KeccakExtract T
KeccakF-1600-opt32.o KeccakF1600RoundConstants_int2_0 R
KeccakF-1600-opt32.o KeccakF1600RoundConstants_int2_1 R
KeccakF-1600-opt32.o KeccakInitialize T
KeccakF-1600-opt32.o KeccakInitializeState T
KeccakF-1600-opt32.o KeccakPermutation T
KeccakF-1600-opt32.o KeccakPermutationOnWords T
KeccakF-1600-opt32.o KeccakPermutationOnWordsAfterXoring T
KeccakF-1600-opt32.o KeccakPermutationOnWordsAfterXoring832bits T
KeccakF-1600-opt32.o fromInterleaving T
KeccakF-1600-opt32.o setInterleavedWordsInto8bytes T
KeccakSponge.o Absorb T
KeccakSponge.o AbsorbQueue T
KeccakSponge.o InitSponge T
KeccakSponge.o PadAndSwitchToSqueezingPhase T
KeccakSponge.o Squeeze T

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

Compiler	Implementations
gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:opt32bi-s2lcu4
gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:opt32bi-s2lcu4
gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:opt32bi-s2lcu4
gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:opt32bi-s2lcu4

Namespace violations

Implementation: T:opt32biT-s2lcu4
Security model: timingleaks
Compiler: gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE

KeccakF-1600-opt32.o KeccakAbsorb T
KeccakF-1600-opt32.o KeccakAbsorb832bits T
KeccakF-1600-opt32.o KeccakExtract T
KeccakF-1600-opt32.o KeccakF1600RoundConstants_int2_0 R
KeccakF-1600-opt32.o KeccakF1600RoundConstants_int2_1 R
KeccakF-1600-opt32.o KeccakInitialize T
KeccakF-1600-opt32.o KeccakInitializeState T
KeccakF-1600-opt32.o KeccakPermutation T
KeccakF-1600-opt32.o KeccakPermutationOnWords T
KeccakF-1600-opt32.o KeccakPermutationOnWordsAfterXoring T
KeccakF-1600-opt32.o KeccakPermutationOnWordsAfterXoring832bits T
KeccakF-1600-opt32.o buildInterleaveTables T
KeccakF-1600-opt32.o deinterleaveTable C
KeccakF-1600-opt32.o interleaveTable C
KeccakF-1600-opt32.o interleaveTablesBuilt B
KeccakF-1600-opt32.o setInterleavedWordsInto8bytes T
KeccakF-1600-opt32.o xor8bytesIntoInterleavedWords T
KeccakSponge.o Absorb T
KeccakSponge.o AbsorbQueue T
KeccakSponge.o InitSponge T
KeccakSponge.o PadAndSwitchToSqueezingPhase T
KeccakSponge.o Squeeze T

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

Compiler	Implementations
gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:opt32biT-s2lcu4
gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:opt32biT-s2lcu4
gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:opt32biT-s2lcu4
gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:opt32biT-s2lcu4

Namespace violations

Implementation: T:opt64lcu24
Security model: timingleaks
Compiler: gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE

KeccakF-1600-opt64.o KeccakAbsorb T
KeccakF-1600-opt64.o KeccakAbsorb832bits T
KeccakF-1600-opt64.o KeccakExtract T
KeccakF-1600-opt64.o KeccakF1600RoundConstants R
KeccakF-1600-opt64.o KeccakInitialize T
KeccakF-1600-opt64.o KeccakInitializeState T
KeccakF-1600-opt64.o KeccakPermutation T
KeccakF-1600-opt64.o KeccakPermutationOnWords T
KeccakF-1600-opt64.o KeccakPermutationOnWordsAfterXoring T
KeccakF-1600-opt64.o KeccakPermutationOnWordsAfterXoring832bits T
KeccakF-1600-opt64.o fromBytesToWord T
KeccakF-1600-opt64.o fromWordToBytes T
KeccakSponge.o Absorb T
KeccakSponge.o AbsorbQueue T
KeccakSponge.o InitSponge T
KeccakSponge.o PadAndSwitchToSqueezingPhase T
KeccakSponge.o Squeeze T

Number of similar (compiler,implementation) pairs: 12, namely:

Compiler	Implementations
gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:opt64lcu24
gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:opt64lcu24
gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:opt64lcu24
gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:opt64lcu24
gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:opt64lcu6
gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:opt64lcu6
gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:opt64lcu6
gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:opt64lcu6
gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:opt64u6
gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:opt64u6
gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:opt64u6
gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:opt64u6

Namespace violations

Implementation: T:simple
Security model: timingleaks
Compiler: gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE

Keccak-simple.o KeccakF T
Keccak-simple.o KeccakF_RoundConstants R

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

Compiler	Implementations
gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:simple
gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:simple
gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:simple
gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:simple

Namespace violations

Implementation: T:simple32bi
Security model: timingleaks
Compiler: gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE

Keccak-simple32BI.o KeccakF T
Keccak-simple32BI.o extractFromState T

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

Compiler	Implementations
gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:simple32bi
gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:simple32bi
gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:simple32bi
gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv -fPIC -fPIE	T:simple32bi