Implementation notes: armeabi, c1, crypto_scalarmult/curve25519

Computer: c1
Architecture: armeabi
CPU ID: unknown CPU ID
SUPERCOP version: 20161026
Operation: crypto_scalarmult
Primitive: curve25519

Time	Implementation	Compiler	Benchmark date	SUPERCOP version
4097346	`neon2`	`gcc -funroll-loops -mcpu=native -mfpu=neon-vfpv4 -Os`	20161211	20161026
4105206	`neon2`	`gcc -mcpu=native -mfpu=neon-vfpv4 -O3`	20161211	20161026
4105919	`neon2`	`gcc -funroll-loops -mcpu=native -mfpu=neon-vfpv4 -O2`	20161211	20161026
4126339	`neon2`	`gcc -mcpu=native -mfpu=neon-vfpv4 -O2`	20161211	20161026
4336994	`neon2`	`gcc -funroll-loops -mcpu=native -mfpu=neon-vfpv4 -O3`	20161211	20161026
4345020	`neon2`	`gcc -mcpu=native -mfpu=neon-vfpv4 -Os`	20161211	20161026
7548679	`ref10`	`gcc -funroll-loops -mcpu=native -mfpu=neon-vfpv4 -Os`	20161211	20161026
7708255	`ref10`	`gcc -mcpu=native -mfpu=neon-vfpv4 -Os`	20161211	20161026
10019659	`ref10`	`gcc -funroll-loops -mcpu=native -mfpu=neon-vfpv4 -O2`	20161211	20161026
10201185	`ref10`	`gcc -mcpu=native -mfpu=neon-vfpv4 -O2`	20161211	20161026
10648631	`ref10`	`gcc -funroll-loops -mcpu=native -mfpu=neon-vfpv4 -O3`	20161211	20161026
12241270	`ref10`	`gcc -mcpu=native -mfpu=neon-vfpv4 -O3`	20161211	20161026
78382867	`ref`	`gcc -funroll-loops -mcpu=native -mfpu=neon-vfpv4 -O2`	20161211	20161026
82695288	`ref`	`gcc -mcpu=native -mfpu=neon-vfpv4 -Os`	20161211	20161026
83581222	`ref`	`gcc -funroll-loops -mcpu=native -mfpu=neon-vfpv4 -O3`	20161211	20161026
84289144	`ref`	`gcc -funroll-loops -mcpu=native -mfpu=neon-vfpv4 -Os`	20161211	20161026
85416151	`ref`	`gcc -mcpu=native -mfpu=neon-vfpv4 -O3`	20161211	20161026
91751646	`ref`	`gcc -mcpu=native -mfpu=neon-vfpv4 -O2`	20161211	20161026

Compiler output

Implementation: crypto_scalarmult/curve25519/donna_c64
Compiler: gcc -funroll-loops -mcpu=native -mfpu=neon-vfpv4 -O2

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

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

Compiler	Implementations
gcc -funroll-loops -mcpu=native -mfpu=neon-vfpv4 -O2	donna_c64
gcc -funroll-loops -mcpu=native -mfpu=neon-vfpv4 -O3	donna_c64
gcc -funroll-loops -mcpu=native -mfpu=neon-vfpv4 -Os	donna_c64
gcc -mcpu=native -mfpu=neon-vfpv4 -O2	donna_c64
gcc -mcpu=native -mfpu=neon-vfpv4 -O3	donna_c64
gcc -mcpu=native -mfpu=neon-vfpv4 -Os	donna_c64