Implementation notes: armeabi, berry2, crypto_scalarmult/curve25519

Computer: berry2
Microarchitecture: armeabi; Cortex-A7 (410fc075)
Architecture: armeabi
CPU ID: unknown CPU ID
SUPERCOP version: 20221122
Operation: crypto_scalarmult
Primitive: curve25519

Time	Object size	Test size	Implementation	Compiler	Benchmark date	SUPERCOP version
3724013	8388 0 0	23288 384 1536	`neon2`	`gcc_-march=native_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20221010	20221005
3728855	8388 0 0	24264 392 1536	`neon2`	`gcc_-march=native_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20221010	20221005
3730756	8388 0 0	26104 392 1536	`neon2`	`gcc_-march=native_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20221010	20221005
3732737	8396 0 0	24136 392 1536	`neon2`	`gcc_-march=native_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20221010	20221005
3734696	8396 0 0	34766 396 1552	`neon2`	`clang_-mcpu=native_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20221010	20221005
5555367	7540 0 0	25228 392 1536	`ref10`	`gcc_-march=native_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20221010	20221005
5555565	7536 0 0	23404 392 1536	`ref10`	`gcc_-march=native_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20221010	20221005
5820162	8752 0 0	35002 396 1552	`ref10`	`clang_-mcpu=native_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20221010	20221005
5951845	7096 0 0	21964 384 1536	`ref10`	`gcc_-march=native_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20221010	20221005
16398292	12696 0 0	28420 392 1536	`ref10`	`gcc_-march=native_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20221010	20221005
83185650	4016 0 0	21704 392 1536	`ref`	`gcc_-march=native_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20221010	20221005
83972814	24552 0 0	50874 396 1552	`ref`	`clang_-mcpu=native_-O3_-fomit-frame-pointer_-fwrapv_-Qunused-arguments_-fPIC_-fPIE`	20221010	20221005
83999305	3016 0 0	18884 392 1536	`ref`	`gcc_-march=native_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20221010	20221005
84890046	2644 0 0	17512 384 1536	`ref`	`gcc_-march=native_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20221010	20221005
91510227	3096 0 0	18820 392 1536	`ref`	`gcc_-march=native_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20221010	20221005

Compiler output

Implementation: donna_c64
Security model: constbranchindex
Compiler: clang -mcpu=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments -fPIC -fPIE

try.c: /usr/bin/ld: libcrypto_scalarmult_curve25519.a(smult.o): in function `crypto_scalarmult_curve25519_donna_c64_constbranchindex':
try.c: smult.c:(.text+0x...): undefined reference to `__multi3'
try.c: /usr/bin/ld: smult.c:(.text+0x...): undefined reference to `__multi3'
try.c: /usr/bin/ld: smult.c:(.text+0x...): undefined reference to `__multi3'
try.c: /usr/bin/ld: smult.c:(.text+0x...): undefined reference to `__multi3'
try.c: /usr/bin/ld: smult.c:(.text+0x...): undefined reference to `__multi3'
try.c: /usr/bin/ld: libcrypto_scalarmult_curve25519.a(smult.o):smult.c:(.text+0x...): more undefined references to `__multi3' follow
try.c: clang: error: linker command failed with exit code 1 (use -v to see invocation)

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

Compiler	Implementations
clang -mcpu=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments -fPIC -fPIE	donna_c64

Compiler output

Implementation: donna_c64
Security model: constbranchindex
Compiler: gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE

smult.c: smult.c:34:1: error: unable to emulate 'TI'
smult.c: typedef unsigned uint128_t __attribute__((mode(TI)));
smult.c: ^~~~~~~
smult.c: smult.c: In function 'fscalar_product':
smult.c: smult.c:76:49: warning: right shift count >= width of type [-Wshift-count-overflow]
smult.c: a = ((uint128_t) in[1]) * scalar + ((limb) (a >> 51));
smult.c: ^~
smult.c: smult.c:79:49: warning: right shift count >= width of type [-Wshift-count-overflow]
smult.c: a = ((uint128_t) in[2]) * scalar + ((limb) (a >> 51));
smult.c: ^~
smult.c: smult.c:82:49: warning: right shift count >= width of type [-Wshift-count-overflow]
smult.c: a = ((uint128_t) in[3]) * scalar + ((limb) (a >> 51));
smult.c: ^~
smult.c: smult.c:85:49: warning: right shift count >= width of type [-Wshift-count-overflow]
smult.c: a = ((uint128_t) in[4]) * scalar + ((limb) (a >> 51));
smult.c: ^~
smult.c: smult.c:88:19: warning: right shift count >= width of type [-Wshift-count-overflow]
smult.c: output[0] += (a >> 51) * 19;
smult.c: ^~
smult.c: smult.c: In function 'fmul':
smult.c: smult.c:132:70: warning: right shift count >= width of type [-Wshift-count-overflow]
smult.c: r0 = (limb)t[0] & 0x7ffffffffffff; c = (limb)(t[0] >> 51);
smult.c: ^~
smult.c: smult.c:133:70: warning: right shift count >= width of type [-Wshift-count-overflow]
smult.c: t[1] += c; r1 = (limb)t[1] & 0x7ffffffffffff; c = (limb)(t[1] >> 51);
smult.c: ...

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

Compiler	Implementations
gcc -march=native -mtune=native -O2 -fomit-frame-pointer -fwrapv -fPIC -fPIE	donna_c64
gcc -march=native -mtune=native -O3 -fomit-frame-pointer -fwrapv -fPIC -fPIE	donna_c64
gcc -march=native -mtune=native -O -fomit-frame-pointer -fwrapv -fPIC -fPIE	donna_c64
gcc -march=native -mtune=native -Os -fomit-frame-pointer -fwrapv -fPIC -fPIE	donna_c64

Compiler output

Implementation: rust_crypto
Security model: constbranchindex
Compiler: clang -mcpu=native -O3 -fomit-frame-pointer -fwrapv -Qunused-arguments -fPIC -fPIE

try.c: Alarm clock

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

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