Implementation notes: amd64, cezanne, crypto_aead/lilliputaeii128v11

Computer: cezanne
Microarchitecture: amd64; Zen 3 (a50f00)
Architecture: amd64
CPU ID: AuthenticAMD-00a50f00-178bfbff
SUPERCOP version: 20240716
Operation: crypto_aead
Primitive: lilliputaeii128v11

Time	Object size	Test size	Implementation	Compiler	Benchmark date	SUPERCOP version
2082235	7000 0 0	23392 812 1016	`T:add_felicsref`	`clang_-mcpu=native_-O3_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
2094058	5857 0 0	22480 812 1048	`T:add_tweakeyloop`	`clang_-march=native_-O2_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
2097485	5632 0 0	22256 812 1048	`T:add_felicsref`	`clang_-march=native_-O2_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
2107114	7670 0 0	24416 812 1048	`T:add_tweakeyloop`	`clang_-march=native_-O3_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
2110130	7014 0 0	23760 812 1048	`T:add_felicsref`	`clang_-march=native_-O3_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
2114359	7656 0 0	24048 812 1016	`T:add_tweakeyloop`	`clang_-mcpu=native_-O3_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
2121529	5873 0 0	22480 812 1048	`T:ref`	`clang_-march=native_-O2_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
2153393	7672 0 0	24048 812 1016	`T:ref`	`clang_-mcpu=native_-O3_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
2156526	7686 0 0	24416 812 1048	`T:ref`	`clang_-march=native_-O3_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
2740849	9009 56 0	25520 836 1080	`T:add_tweakeyloop`	`gcc_-march=native_-mtune=native_-O3_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
2761795	8897 56 0	25408 836 1080	`T:ref`	`gcc_-march=native_-mtune=native_-O3_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
2943244	4743 0 0	19368 780 1080	`T:add_felicsref`	`gcc_-march=native_-mtune=native_-O2_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
3646649	5384 56 0	20240 836 1080	`T:add_tweakeyloop`	`gcc_-march=native_-mtune=native_-O2_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
3917960	5272 56 0	20128 836 1080	`T:ref`	`gcc_-march=native_-mtune=native_-O2_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
4031651	4251 0 0	17726 804 1016	`T:add_felicsref`	`clang_-march=native_-Os_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
4097070	4644 0 0	18750 804 1016	`T:add_felicsref`	`clang_-march=native_-O_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
4234134	4982 56 0	19102 860 1016	`T:ref`	`clang_-march=native_-O_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
4284216	4253 0 0	18479 772 1080	`T:add_felicsref`	`gcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
4309631	7736 0 0	24024 780 1080	`T:add_felicsref`	`gcc_-march=native_-mtune=native_-O3_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
4392211	4718 56 0	19143 828 1080	`T:ref`	`gcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
4846032	4691 56 0	18230 860 1016	`T:add_tweakeyloop`	`clang_-march=native_-Os_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
4989793	4594 56 0	18086 860 1016	`T:ref`	`clang_-march=native_-Os_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
5447345	4428 56 0	18847 828 1080	`T:add_tweakeyloop`	`gcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
5688553	4888 56 0	19014 860 1016	`T:add_tweakeyloop`	`clang_-march=native_-O_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
6367717	3766 0 0	16811 756 1048	`T:add_felicsref`	`gcc_-march=native_-mtune=native_-Os_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
6429206	4130 56 0	17363 812 1048	`T:ref`	`gcc_-march=native_-mtune=native_-Os_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
8044322	3750 56 0	16995 812 1048	`T:add_tweakeyloop`	`gcc_-march=native_-mtune=native_-Os_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
12341248	9713 0 0	26472 812 1048	`T:add_threshold`	`clang_-march=native_-O3_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
12352340	9683 0 0	26088 812 1016	`T:add_threshold`	`clang_-mcpu=native_-O3_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
12373926	7745 0 0	24392 812 1048	`T:add_threshold`	`clang_-march=native_-O2_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
12840336	11320 0 0	27664 780 1080	`T:add_threshold`	`gcc_-march=native_-mtune=native_-O3_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
13728334	6596 56 0	20726 860 1016	`T:add_threshold`	`clang_-march=native_-O_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
14213279	7692 0 0	22392 780 1080	`T:add_threshold`	`gcc_-march=native_-mtune=native_-O2_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
14275981	6444 56 0	19982 860 1016	`T:add_threshold`	`clang_-march=native_-Os_-fwrapv_-Qunused-arguments_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
14896089	6792 0 0	21055 772 1080	`T:add_threshold`	`gcc_-march=native_-mtune=native_-O_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716
27980364	6271 0 0	19355 756 1048	`T:add_threshold`	`gcc_-march=native_-mtune=native_-Os_-fwrapv_-fPIC_-fPIE_-gdwarf-4_-Wall`	20240716	20240716

Compiler output

tweakey.c: In file included from tweakey.c:33:
tweakey.c: ./multiplications.h:93:13: warning: unused function '_multiply_MR' [-Wunused-function]
tweakey.c: static void _multiply_MR(const uint8_t x[LANE_BYTES], uint8_t y[LANE_BYTES])
tweakey.c:             ^
tweakey.c: ./multiplications.h:105:13: warning: unused function '_multiply_MR2' [-Wunused-function]
tweakey.c: static void _multiply_MR2(const uint8_t x[LANE_BYTES], uint8_t y[LANE_BYTES])
tweakey.c:             ^
tweakey.c: ./multiplications.h:119:13: warning: unused function '_multiply_MR3' [-Wunused-function]
tweakey.c: static void _multiply_MR3(const uint8_t x[LANE_BYTES], uint8_t y[LANE_BYTES])
tweakey.c:             ^
tweakey.c: 3 warnings generated.

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

Implementation	Compiler
`T:add_felicsref`	`clang -march=native -O2 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:add_felicsref`	`clang -march=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:add_felicsref`	`clang -march=native -O -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:add_felicsref`	`clang -march=native -Os -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:add_felicsref`	`clang -mcpu=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`

Compiler output

tweakey.c: In file included from tweakey.c:33:
tweakey.c: multiplications.h:119:13: warning: '_multiply_MR3' defined but not used [-Wunused-function]
tweakey.c:   119 | static void _multiply_MR3(const uint8_t x[LANE_BYTES], uint8_t y[LANE_BYTES])
tweakey.c:       |             ^~~~~~~~~~~~~
tweakey.c: multiplications.h:105:13: warning: '_multiply_MR2' defined but not used [-Wunused-function]
tweakey.c:   105 | static void _multiply_MR2(const uint8_t x[LANE_BYTES], uint8_t y[LANE_BYTES])
tweakey.c:       |             ^~~~~~~~~~~~~
tweakey.c: multiplications.h:93:13: warning: '_multiply_MR' defined but not used [-Wunused-function]
tweakey.c:    93 | static void _multiply_MR(const uint8_t x[LANE_BYTES], uint8_t y[LANE_BYTES])
tweakey.c:       |             ^~~~~~~~~~~~

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

Implementation	Compiler
`T:add_felicsref`	`gcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (10.2.1_20210110)`
`T:add_felicsref`	`gcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (10.2.1_20210110)`
`T:add_felicsref`	`gcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (10.2.1_20210110)`
`T:add_felicsref`	`gcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (10.2.1_20210110)`

Compiler output

cipher.c: cipher.c:173:24: warning: '&' within '^' [-Wbitwise-op-parentheses]
cipher.c:         tmp0 = P[Q[y_hi&3 ^ (y_hi&8)>>1][z_hi]];
cipher.c:                    ~~~~^~ ~
cipher.c: cipher.c:173:24: note: place parentheses around the '&' expression to silence this warning
cipher.c:         tmp0 = P[Q[y_hi&3 ^ (y_hi&8)>>1][z_hi]];
cipher.c:                        ^
cipher.c:                    (     )
cipher.c: cipher.c:174:24: warning: '&' within '^' [-Wbitwise-op-parentheses]
cipher.c:         tmp1 = P[Q[z_hi&3 ^ (z_hi&8)>>1][x_hi]];
cipher.c:                    ~~~~^~ ~
cipher.c: cipher.c:174:24: note: place parentheses around the '&' expression to silence this warning
cipher.c:         tmp1 = P[Q[z_hi&3 ^ (z_hi&8)>>1][x_hi]];
cipher.c:                        ^
cipher.c:                    (     )
cipher.c: cipher.c:175:24: warning: '&' within '^' [-Wbitwise-op-parentheses]
cipher.c:         tmp2 = P[Q[x_hi&3 ^ (x_hi&8)>>1][y_hi]];
cipher.c:                    ~~~~^~ ~
cipher.c: cipher.c:175:24: note: place parentheses around the '&' expression to silence this warning
cipher.c:         tmp2 = P[Q[x_hi&3 ^ (x_hi&8)>>1][y_hi]];
cipher.c:                        ^
cipher.c:                    (     )
cipher.c: cipher.c:176:23: warning: '&' within '^' [-Wbitwise-op-parentheses]
cipher.c:         x_lo ^= Q[tmp1&3 ^ (tmp1&8)>>1][tmp2];
cipher.c:                   ~~~~^~ ~
cipher.c: cipher.c:176:23: note: place parentheses around the '&' expression to silence this warning
cipher.c: ...

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

Implementation	Compiler
`T:add_threshold`	`clang -march=native -O2 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:add_threshold`	`clang -march=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:add_threshold`	`clang -march=native -O -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:add_threshold`	`clang -march=native -Os -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:add_threshold`	`clang -mcpu=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`

Compiler output

cipher.c: cipher.c: In function '_nonlinear_layer':
cipher.c: cipher.c:173:24: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
cipher.c:   173 |         tmp0 = P[Q[y_hi&3 ^ (y_hi&8)>>1][z_hi]];
cipher.c:       |                    ~~~~^~
cipher.c: cipher.c:174:24: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
cipher.c:   174 |         tmp1 = P[Q[z_hi&3 ^ (z_hi&8)>>1][x_hi]];
cipher.c:       |                    ~~~~^~
cipher.c: cipher.c:175:24: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
cipher.c:   175 |         tmp2 = P[Q[x_hi&3 ^ (x_hi&8)>>1][y_hi]];
cipher.c:       |                    ~~~~^~
cipher.c: cipher.c:176:23: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
cipher.c:   176 |         x_lo ^= Q[tmp1&3 ^ (tmp1&8)>>1][tmp2];
cipher.c:       |                   ~~~~^~
cipher.c: cipher.c:177:23: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
cipher.c:   177 |         y_lo ^= Q[tmp2&3 ^ (tmp2&8)>>1][tmp0];
cipher.c:       |                   ~~~~^~
cipher.c: cipher.c:178:23: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
cipher.c:   178 |         z_lo ^= Q[tmp0&3 ^ (tmp0&8)>>1][tmp1];
cipher.c:       |                   ~~~~^~

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

Implementation	Compiler
`T:add_threshold`	`gcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (10.2.1_20210110)`
`T:add_threshold`	`gcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (10.2.1_20210110)`
`T:add_threshold`	`gcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (10.2.1_20210110)`
`T:add_threshold`	`gcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (10.2.1_20210110)`

Namespace violations

cipher.o lilliput_tbc_decrypt T
cipher.o lilliput_tbc_encrypt T
lilliput-ii.o lilliput_ae_decrypt T
lilliput-ii.o lilliput_ae_encrypt T
tweakey.o tweakey_state_extract T
tweakey.o tweakey_state_init T
tweakey.o tweakey_state_update T

Number of similar (implementation,compiler) pairs: 27, namely:

Implementation	Compiler
`T:add_felicsref`	`clang -march=native -O2 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:add_felicsref`	`clang -march=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:add_felicsref`	`clang -march=native -O -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:add_felicsref`	`clang -march=native -Os -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:add_felicsref`	`clang -mcpu=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:add_felicsref`	`gcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (10.2.1_20210110)`
`T:add_felicsref`	`gcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (10.2.1_20210110)`
`T:add_felicsref`	`gcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (10.2.1_20210110)`
`T:add_felicsref`	`gcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (10.2.1_20210110)`
`T:add_tweakeyloop`	`clang -march=native -O2 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:add_tweakeyloop`	`clang -march=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:add_tweakeyloop`	`clang -march=native -O -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:add_tweakeyloop`	`clang -march=native -Os -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:add_tweakeyloop`	`clang -mcpu=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:add_tweakeyloop`	`gcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (10.2.1_20210110)`
`T:add_tweakeyloop`	`gcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (10.2.1_20210110)`
`T:add_tweakeyloop`	`gcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (10.2.1_20210110)`
`T:add_tweakeyloop`	`gcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (10.2.1_20210110)`
`T:ref`	`clang -march=native -O2 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:ref`	`clang -march=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:ref`	`clang -march=native -O -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:ref`	`clang -march=native -Os -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:ref`	`clang -mcpu=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:ref`	`gcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (10.2.1_20210110)`
`T:ref`	`gcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (10.2.1_20210110)`
`T:ref`	`gcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (10.2.1_20210110)`
`T:ref`	`gcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (10.2.1_20210110)`

Namespace violations

cipher.o lilliput_tbc_decrypt T
cipher.o lilliput_tbc_encrypt T
lilliput-ii.o lilliput_ae_decrypt T
lilliput-ii.o lilliput_ae_encrypt T
random.o randombytes T
tweakey.o tweakey_state_extract T
tweakey.o tweakey_state_init T
tweakey.o tweakey_state_update T

Number of similar (implementation,compiler) pairs: 9, namely:

Implementation	Compiler
`T:add_threshold`	`clang -march=native -O2 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:add_threshold`	`clang -march=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:add_threshold`	`clang -march=native -O -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:add_threshold`	`clang -march=native -Os -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:add_threshold`	`clang -mcpu=native -O3 -fwrapv -Qunused-arguments -fPIC -fPIE -gdwarf-4 -Wall (Debian_Clang_11.0.1)`
`T:add_threshold`	`gcc -march=native -mtune=native -O2 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (10.2.1_20210110)`
`T:add_threshold`	`gcc -march=native -mtune=native -O3 -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (10.2.1_20210110)`
`T:add_threshold`	`gcc -march=native -mtune=native -O -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (10.2.1_20210110)`
`T:add_threshold`	`gcc -march=native -mtune=native -Os -fwrapv -fPIC -fPIE -gdwarf-4 -Wall (10.2.1_20210110)`