Implementation notes: aarch64, a72, crypto_scalarmult/curve25519

Computer: a72
Architecture: aarch64
CPU ID: unknown CPU ID
SUPERCOP version: 20170904
Operation: crypto_scalarmult
Primitive: curve25519

Time	Object size	Test size	Implementation	Compiler	Benchmark date	SUPERCOP version
1462581	? ? ?	? ? ?	`ref10`	`gcc_-march=native_-mtune=native_-Os`	20171010	20170904
1465570	? ? ?	? ? ?	`ref10`	`gcc_-funroll-loops_-march=native_-mtune=native_-O3`	20171010	20170904
1471161	? ? ?	? ? ?	`ref10`	`gcc_-march=native_-mtune=native_-O2`	20171010	20170904
1477238	? ? ?	? ? ?	`ref10`	`gcc_-funroll-loops_-march=native_-mtune=native_-O2`	20171010	20170904
1484170	? ? ?	? ? ?	`ref10`	`gcc_-march=native_-mtune=native_-O3`	20171010	20170904
1506896	? ? ?	? ? ?	`ref10`	`gcc_-funroll-loops_-march=native_-mtune=native_-Os`	20171010	20170904
1617568	? ? ?	? ? ?	`donna_c64`	`gcc_-march=native_-mtune=native_-O3`	20171010	20170904
1620481	? ? ?	? ? ?	`donna_c64`	`gcc_-funroll-loops_-march=native_-mtune=native_-O3`	20171010	20170904
1630466	? ? ?	? ? ?	`donna_c64`	`gcc_-funroll-loops_-march=native_-mtune=native_-O2`	20171010	20170904
1671189	? ? ?	? ? ?	`donna_c64`	`gcc_-march=native_-mtune=native_-O2`	20171010	20170904
1786466	? ? ?	? ? ?	`donna_c64`	`gcc_-funroll-loops_-march=native_-mtune=native_-Os`	20171010	20170904
1792802	? ? ?	? ? ?	`donna_c64`	`gcc_-march=native_-mtune=native_-Os`	20171010	20170904
22024494	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=native_-mtune=native_-O3`	20171010	20170904
23335058	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=native_-mtune=native_-O2`	20171010	20170904
24678336	? ? ?	? ? ?	`ref`	`gcc_-march=native_-mtune=native_-O3`	20171010	20170904
32031016	? ? ?	? ? ?	`ref`	`gcc_-march=native_-mtune=native_-O2`	20171010	20170904
40461121	? ? ?	? ? ?	`ref`	`gcc_-funroll-loops_-march=native_-mtune=native_-Os`	20171010	20170904
40991508	? ? ?	? ? ?	`ref`	`gcc_-march=native_-mtune=native_-Os`	20171010	20170904

Compiler output

Implementation: crypto_scalarmult/curve25519/donna_c64
Compiler: gcc -funroll-loops -march=native -mtune=native -O2

smult.c: smult.c:149:1: warning: always_inline function might not be inlinable [-Wattributes]
smult.c: 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: 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: 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: 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: fsum(limb *output, const limb *in) {
smult.c: ^~~~

Number of similar (compiler,implementation) pairs: 6, namely:

Compiler	Implementations
gcc -funroll-loops -march=native -mtune=native -O2	donna_c64
gcc -funroll-loops -march=native -mtune=native -O3	donna_c64
gcc -funroll-loops -march=native -mtune=native -Os	donna_c64
gcc -march=native -mtune=native -O2	donna_c64
gcc -march=native -mtune=native -O3	donna_c64
gcc -march=native -mtune=native -Os	donna_c64