Implementation notes: aarch64, pmnod145, crypto_scalarmult/curve25519

Computer: pmnod145
Architecture: aarch64
CPU ID: 431f0af1
SUPERCOP version: 20191017
Operation: crypto_scalarmult
Primitive: curve25519

Time	Object size	Test size	Implementation	Compiler	Benchmark date	SUPERCOP version
929525	20704 0 0	50707 848 1600	`donna_c64`	`gcc_-march=native_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20191018	20191017
1035900	17112 0 0	46011 848 1584	`donna_c64`	`gcc_-march=native_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20191018	20191017
1075075	16416 0 0	43751 832 1568	`donna_c64`	`gcc_-march=native_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20191018	20191017
1099900	19708 0 0	52040 872 1584	`donna_c64`	`armclang_-march=armv8a+crypto_-mcpu=thunderx2t99_-mtune=thunderx2t99_-O2_-fPIC_-fPIE`	20191018	20191017
1114850	17032 0 0	45283 848 1584	`donna_c64`	`gcc_-march=native_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20191018	20191017
1135300	19696 0 0	52672 872 1584	`donna_c64`	`armclang_-march=armv8a+crypto_-mcpu=thunderx2t99_-mtune=thunderx2t99_-O3_-fPIC_-fPIE`	20191018	20191017
1873575	5548 0 0	32767 832 1568	`ref10`	`gcc_-march=native_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20191018	20191017
1884100	6588 0 0	39744 872 1584	`ref10`	`armclang_-march=armv8a+crypto_-mcpu=thunderx2t99_-mtune=thunderx2t99_-O3_-fPIC_-fPIE`	20191018	20191017
1894625	5968 0 0	34787 848 1584	`ref10`	`gcc_-march=native_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20191018	20191017
1901925	5460 0 0	37960 872 1584	`ref10`	`armclang_-march=armv8a+crypto_-mcpu=thunderx2t99_-mtune=thunderx2t99_-O2_-fPIC_-fPIE`	20191018	20191017
2042325	6484 0 0	34643 848 1584	`ref10`	`gcc_-march=native_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20191018	20191017
2095050	5608 0 0	35555 848 1600	`ref10`	`gcc_-march=native_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20191018	20191017
36891625	5144 0 0	35131 848 1600	`ref`	`gcc_-march=native_-mtune=native_-O3_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20191018	20191017
43751350	65052 0 0	98072 872 1584	`ref`	`armclang_-march=armv8a+crypto_-mcpu=thunderx2t99_-mtune=thunderx2t99_-O3_-fPIC_-fPIE`	20191018	20191017
44026175	103044 0 0	135392 872 1584	`ref`	`armclang_-march=armv8a+crypto_-mcpu=thunderx2t99_-mtune=thunderx2t99_-O2_-fPIC_-fPIE`	20191018	20191017
46593625	3376 0 0	32251 848 1584	`ref`	`gcc_-march=native_-mtune=native_-O2_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20191018	20191017
52027575	2732 0 0	30135 832 1568	`ref`	`gcc_-march=native_-mtune=native_-Os_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20191018	20191017
54443500	3084 0 0	31371 848 1584	`ref`	`gcc_-march=native_-mtune=native_-O_-fomit-frame-pointer_-fwrapv_-fPIC_-fPIE`	20191018	20191017

Compiler output

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

smult.c: smult.c:149:1: warning: always_inline function might not be inlinable [-Wattributes]
smult.c: 149 | fsquare_times(felem output, const felem in, limb count) {
smult.c: | ^~~~~~~~~~~~~
smult.c: smult.c:100:1: warning: always_inline function might not be inlinable [-Wattributes]
smult.c: 100 | fmul(felem output, const felem in2, const felem in) {
smult.c: | ^~~~
smult.c: smult.c:70:1: warning: always_inline function might not be inlinable [-Wattributes]
smult.c: 70 | fscalar_product(felem output, const felem in, const limb scalar) {
smult.c: | ^~~~~~~~~~~~~~~
smult.c: smult.c:56:1: warning: always_inline function might not be inlinable [-Wattributes]
smult.c: 56 | fdifference_backwards(felem out, const felem in) {
smult.c: | ^~~~~~~~~~~~~~~~~~~~~
smult.c: smult.c:41:1: warning: always_inline function might not be inlinable [-Wattributes]
smult.c: 41 | fsum(limb *output, const limb *in) {
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