Implementation notes: riscv64, riscvunleashed000, crypto_hashblocks/sha512

Computer: riscvunleashed000
Microarchitecture: riscv64; U54 (sifive,u54-mc)
Architecture: riscv64
CPU ID: unknown CPU ID
SUPERCOP version: 20240107
Operation: crypto_hashblocks
Primitive: sha512

Time	Object size	Test size	Implementation	Compiler	Benchmark date	SUPERCOP version
62576	18706 0 0	27147 776 728	`ref`	`clang_-march=rv64imafdc_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
62577	18706 0 0	26727 776 728	`ref`	`clang_-march=rv64imafdc_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
62577	18706 0 0	26727 776 728	`ref`	`clang_-march=rv64imafdc_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
62577	18706 0 0	27147 776 728	`ref`	`clang_-mcpu=native_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
62948	18760 0 0	26789 776 728	`inplace`	`clang_-march=rv64imafdc_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
62948	18760 0 0	27209 776 728	`inplace`	`clang_-march=rv64imafdc_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
62948	18760 0 0	26789 776 728	`inplace`	`clang_-march=rv64imafdc_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
62948	18760 0 0	27209 776 728	`inplace`	`clang_-mcpu=native_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
63111	17790 0 0	23818 760 728	`inplace`	`gcc_-mcpu=sifive-u54_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
63220	17588 0 0	23608 760 728	`ref`	`gcc_-mcpu=sifive-u54_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
63617	17554 0 0	23789 768 721	`inplace`	`clang_-march=rv64imafdc_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
63667	3170 0 0	9290 760 728	`wflip`	`gcc_-mcpu=sifive-u54_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
63734	4956 0 0	12969 776 728	`wflip`	`clang_-march=rv64imafdc_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
63734	4956 0 0	12969 776 728	`wflip`	`clang_-march=rv64imafdc_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
63737	4956 0 0	13389 776 728	`wflip`	`clang_-march=rv64imafdc_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
63737	4956 0 0	13389 776 728	`wflip`	`clang_-mcpu=native_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
63973	17632 0 0	23859 768 721	`ref`	`clang_-march=rv64imafdc_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
64281	20760 0 0	29036 776 728	`inplace`	`gcc_-mcpu=sifive-u54_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
64305	20808 0 0	29076 776 728	`ref`	`gcc_-mcpu=sifive-u54_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
64538	17916 0 0	24331 768 728	`inplace`	`gcc_-mcpu=sifive-u54_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
64542	17416 0 0	23823 768 728	`ref`	`gcc_-mcpu=sifive-u54_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
64643	19184 0 0	25730 776 728	`ref`	`gcc_-mcpu=sifive-u54_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
64771	5464 0 0	13877 776 728	`compact`	`clang_-march=rv64imafdc_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
64771	5464 0 0	13877 776 728	`compact`	`clang_-mcpu=native_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
64782	19128 0 0	25682 776 728	`inplace`	`gcc_-mcpu=sifive-u54_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
64787	4618 0 0	10965 768 721	`wflip`	`clang_-march=rv64imafdc_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
64911	4610 0 0	12603 776 728	`compact`	`clang_-march=rv64imafdc_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
64911	4610 0 0	12603 776 728	`compact`	`clang_-march=rv64imafdc_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
65522	3010 0 0	9519 768 728	`wflip`	`gcc_-mcpu=sifive-u54_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
65763	4512 0 0	10831 768 721	`compact`	`clang_-march=rv64imafdc_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
65914	6038 0 0	14274 776 728	`compact`	`gcc_-mcpu=sifive-u54_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
66243	5024 0 0	11634 776 728	`compact`	`gcc_-mcpu=sifive-u54_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
67107	3274 0 0	11490 776 728	`wflip`	`gcc_-mcpu=sifive-u54_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
67226	3284 0 0	9898 776 728	`wflip`	`gcc_-mcpu=sifive-u54_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
67985	4736 0 0	10844 760 728	`compact`	`gcc_-mcpu=sifive-u54_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
69652	4738 0 0	11233 768 728	`compact`	`gcc_-mcpu=sifive-u54_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
77951	1478 0 0	9507 776 728	`compact4`	`clang_-march=rv64imafdc_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
77953	1478 0 0	9507 776 728	`compact4`	`clang_-march=rv64imafdc_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
78584	2368 0 0	10817 776 728	`compact4`	`clang_-march=rv64imafdc_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
78584	2368 0 0	10817 776 728	`compact4`	`clang_-mcpu=native_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
79723	1332 0 0	7687 768 721	`compact4`	`clang_-march=rv64imafdc_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
81546	1408 0 0	8046 776 728	`compact4`	`gcc_-mcpu=sifive-u54_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
88304	1384 0 0	7528 760 728	`compact4`	`gcc_-mcpu=sifive-u54_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
90104	2556 0 0	10828 776 728	`compact4`	`gcc_-mcpu=sifive-u54_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
92364	1338 0 0	7869 768 728	`compact4`	`gcc_-mcpu=sifive-u54_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
119780	1656 0 0	8266 776 728	`compact2`	`gcc_-mcpu=sifive-u54_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
121036	2670 0 0	10906 776 728	`compact2`	`gcc_-mcpu=sifive-u54_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
123683	1904 0 0	9913 776 728	`compact2`	`clang_-march=rv64imafdc_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
123691	1904 0 0	9913 776 728	`compact2`	`clang_-march=rv64imafdc_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
123921	2752 0 0	11181 776 728	`compact2`	`clang_-mcpu=native_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
123980	2752 0 0	11181 776 728	`compact2`	`clang_-march=rv64imafdc_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
124512	1528 0 0	7847 768 721	`compact2`	`clang_-march=rv64imafdc_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
127481	2314 0 0	10763 776 728	`compact3`	`clang_-march=rv64imafdc_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
127481	2314 0 0	10763 776 728	`compact3`	`clang_-mcpu=native_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
128713	1454 0 0	9483 776 728	`compact3`	`clang_-march=rv64imafdc_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
128716	1454 0 0	9483 776 728	`compact3`	`clang_-march=rv64imafdc_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
128974	1586 0 0	7694 760 728	`compact2`	`gcc_-mcpu=sifive-u54_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
129420	1358 0 0	7713 768 721	`compact3`	`clang_-march=rv64imafdc_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20240111	20231222
130750	1574 0 0	8069 768 728	`compact2`	`gcc_-mcpu=sifive-u54_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
142211	1582 0 0	8220 776 728	`compact3`	`gcc_-mcpu=sifive-u54_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
152999	2666 0 0	10938 776 728	`compact3`	`gcc_-mcpu=sifive-u54_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
153798	1524 0 0	7668 760 728	`compact3`	`gcc_-mcpu=sifive-u54_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222
155000	1540 0 0	8071 768 728	`compact3`	`gcc_-mcpu=sifive-u54_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20240111	20231222

Compiler output

Implementation: avx
Security model: constbranchindex
Compiler: clang -march=rv64imafdc -mtune=native -O2 -fomit-frame-pointer -fwrapv -Qunused-arguments -fPIC -fPIE

inner.c: In file included from inner.c:1:
inner.c: In file included from /usr/lib/llvm-10/lib/clang/10.0.0/include/immintrin.h:14:
inner.c: /usr/lib/llvm-10/lib/clang/10.0.0/include/mmintrin.h:50:12: error: invalid conversion between vector type '__m64' (vector of 1 'long long' value) and integer type 'int' of different size
inner.c: return (__m64)__builtin_ia32_vec_init_v2si(__i, 0);
inner.c: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
inner.c: /usr/lib/llvm-10/lib/clang/10.0.0/include/mmintrin.h:129:12: error: invalid conversion between vector type '__m64' (vector of 1 'long long' value) and integer type 'int' of different size
inner.c: return (__m64)__builtin_ia32_packsswb((__v4hi)__m1, (__v4hi)__m2);
inner.c: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
inner.c: /usr/lib/llvm-10/lib/clang/10.0.0/include/mmintrin.h:159:12: error: invalid conversion between vector type '__m64' (vector of 1 'long long' value) and integer type 'int' of different size
inner.c: return (__m64)__builtin_ia32_packssdw((__v2si)__m1, (__v2si)__m2);
inner.c: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
inner.c: /usr/lib/llvm-10/lib/clang/10.0.0/include/mmintrin.h:189:12: error: invalid conversion between vector type '__m64' (vector of 1 'long long' value) and integer type 'int' of different size
inner.c: return (__m64)__builtin_ia32_packuswb((__v4hi)__m1, (__v4hi)__m2);
inner.c: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
inner.c: /usr/lib/llvm-10/lib/clang/10.0.0/include/mmintrin.h:216:12: error: invalid conversion between vector type '__m64' (vector of 1 'long long' value) and integer type 'int' of different size
inner.c: return (__m64)__builtin_ia32_punpckhbw((__v8qi)__m1, (__v8qi)__m2);
inner.c: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
inner.c: /usr/lib/llvm-10/lib/clang/10.0.0/include/mmintrin.h:239:12: error: invalid conversion between vector type '__m64' (vector of 1 'long long' value) and integer type 'int' of different size
inner.c: return (__m64)__builtin_ia32_punpckhwd((__v4hi)__m1, (__v4hi)__m2);
inner.c: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
inner.c: /usr/lib/llvm-10/lib/clang/10.0.0/include/mmintrin.h:260:12: error: invalid conversion between vector type '__m64' (vector of 1 'long long' value) and integer type 'int' of different size
inner.c: return (__m64)__builtin_ia32_punpckhdq((__v2si)__m1, (__v2si)__m2);
inner.c: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
inner.c: /usr/lib/llvm-10/lib/clang/10.0.0/include/mmintrin.h:287:12: error: invalid conversion between vector type '__m64' (vector of 1 'long long' value) and integer type 'int' of different size
inner.c: return (__m64)__builtin_ia32_punpcklbw((__v8qi)__m1, (__v8qi)__m2);
inner.c: ...

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

Compiler	Implementations
clang -march=rv64imafdc -mtune=native -O2 -fomit-frame-pointer -fwrapv -Qunused-arguments -fPIC -fPIE	avx
clang -march=rv64imafdc -mtune=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments -fPIC -fPIE	avx
clang -march=rv64imafdc -mtune=native -O -fomit-frame-pointer -fwrapv -Qunused-arguments -fPIC -fPIE	avx
clang -march=rv64imafdc -mtune=native -Os -fomit-frame-pointer -fwrapv -Qunused-arguments -fPIC -fPIE	avx
clang -mcpu=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments -fPIC -fPIE	avx

Compiler output

Implementation: avx
Security model: constbranchindex
Compiler: gcc -mcpu=sifive-u54 -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE

inner.c: inner.c:1:10: fatal error: immintrin.h: No such file or directory
inner.c: 1 | #include <immintrin.h>
inner.c: | ^~~~~~~~~~~~~
inner.c: compilation terminated.

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

Compiler	Implementations
gcc -mcpu=sifive-u54 -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE	avx
gcc -mcpu=sifive-u54 -O3 -fomit-frame-pointer -fwrapv -fPIC -fPIE	avx
gcc -mcpu=sifive-u54 -O -fomit-frame-pointer -fwrapv -fPIC -fPIE	avx
gcc -mcpu=sifive-u54 -Os -fomit-frame-pointer -fwrapv -fPIC -fPIE	avx

Compiler output

Implementation: avx2
Security model: constbranchindex
Compiler: clang -march=rv64imafdc -mtune=native -O2 -fomit-frame-pointer -fwrapv -Qunused-arguments -fPIC -fPIE

inner.S: inner.S:422:6: error: unrecognized operand modifier
inner.S: mov %rsp,%r11
inner.S: ^
inner.S: inner.S:422:6: error: unknown operand
inner.S: mov %rsp,%r11
inner.S: ^
inner.S: inner.S:423:5: error: unknown operand
inner.S: and $511,%r11
inner.S: ^
inner.S: inner.S:424:5: error: unknown operand
inner.S: add $416,%r11
inner.S: ^
inner.S: inner.S:425:6: error: unrecognized operand modifier
inner.S: sub %r11,%rsp
inner.S: ^
inner.S: inner.S:425:6: error: unknown operand
inner.S: sub %r11,%rsp
inner.S: ^
inner.S: inner.S:430:6: error: unrecognized operand modifier
inner.S: mov %rcx,%r8
inner.S: ^
inner.S: inner.S:430:6: error: unknown operand
inner.S: mov %rcx,%r8
inner.S: ^
inner.S: inner.S:435:13: error: expected register
inner.S: ...

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

Compiler	Implementations
clang -march=rv64imafdc -mtune=native -O2 -fomit-frame-pointer -fwrapv -Qunused-arguments -fPIC -fPIE	avx2
clang -march=rv64imafdc -mtune=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments -fPIC -fPIE	avx2
clang -march=rv64imafdc -mtune=native -O -fomit-frame-pointer -fwrapv -Qunused-arguments -fPIC -fPIE	avx2
clang -march=rv64imafdc -mtune=native -Os -fomit-frame-pointer -fwrapv -Qunused-arguments -fPIC -fPIE	avx2
clang -mcpu=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments -fPIC -fPIE	avx2

Compiler output

Implementation: avx2
Security model: constbranchindex
Compiler: gcc -mcpu=sifive-u54 -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE

inner.S: inner.S: Assembler messages:
inner.S: inner.S:422: Error: unrecognized opcode `mov %rsp,%r11'
inner.S: inner.S:423: Error: illegal operands `and $511,%r11'
inner.S: inner.S:424: Error: illegal operands `add $416,%r11'
inner.S: inner.S:425: Error: illegal operands `sub %r11,%rsp'
inner.S: inner.S:430: Error: unrecognized opcode `mov %rcx,%r8'
inner.S: inner.S:435: Error: unrecognized opcode `vmovupd 640(%rcx),%ymm0'
inner.S: inner.S:440: Error: unrecognized opcode `vmovupd 0(%rdi),%ymm1'
inner.S: inner.S:445: Error: unrecognized opcode `mov %rdi,%rcx'
inner.S: inner.S:450: Error: unrecognized opcode `vmovupd 32(%rdi),%ymm2'
inner.S: inner.S:455: Error: unrecognized opcode `vpshufb %ymm0,%ymm1,%ymm1'
inner.S: inner.S:460: Error: unrecognized opcode `vpshufb %ymm0,%ymm2,%ymm2'
inner.S: inner.S:465: Error: unrecognized opcode `vmovapd %ymm1,0(%rsp)'
inner.S: inner.S:470: Error: unrecognized opcode `movq %r11,320(%rsp)'
inner.S: inner.S:475: Error: unrecognized opcode `vmovapd %ymm2,32(%rsp)'
inner.S: inner.S:480: Error: unrecognized opcode `movq %r13,328(%rsp)'
inner.S: inner.S:485: Error: unrecognized opcode `movq %r12,336(%rsp)'
inner.S: inner.S:490: Error: unrecognized opcode `movq %r14,344(%rsp)'
inner.S: inner.S:495: Error: unrecognized opcode `movq %rbx,352(%rsp)'
inner.S: inner.S:500: Error: unrecognized opcode `movq %r15,360(%rsp)'
inner.S: inner.S:505: Error: unrecognized opcode `movq %rbp,368(%rsp)'
inner.S: inner.S:510: Error: unrecognized opcode `movq %rdx,376(%rsp)'
inner.S: inner.S:515: Error: unrecognized opcode `mov %rsi,%rdi'
inner.S: inner.S:520: Error: unrecognized opcode `movq %rcx,384(%rsp)'
inner.S: inner.S:525: Error: unrecognized opcode `movq 0(%rsp),%rsi'
inner.S: ...

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

Compiler	Implementations
gcc -mcpu=sifive-u54 -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE	avx2
gcc -mcpu=sifive-u54 -O3 -fomit-frame-pointer -fwrapv -fPIC -fPIE	avx2
gcc -mcpu=sifive-u54 -O -fomit-frame-pointer -fwrapv -fPIC -fPIE	avx2
gcc -mcpu=sifive-u54 -Os -fomit-frame-pointer -fwrapv -fPIC -fPIE	avx2