diff options
| author | Jussi Kivilinna <jussi.kivilinna@iki.fi> | 2014-11-02 16:01:11 +0200 |
|---|---|---|
| committer | Jussi Kivilinna <jussi.kivilinna@iki.fi> | 2014-11-02 16:26:53 +0200 |
| commit | 0b520128551054d83fb0bb2db8873394f38de498 (patch) | |
| tree | cba613c83ce9a044417a2084573211ee254654eb /cipher/poly1305.c | |
| parent | c584f44543883346d5a565581ff99a0afce9c5e1 (diff) | |
| download | libgcrypt-0b520128551054d83fb0bb2db8873394f38de498.tar.gz | |
Add ARM/NEON implementation of Poly1305
* cipher/Makefile.am: Add 'poly1305-armv7-neon.S'.
* cipher/poly1305-armv7-neon.S: New.
* cipher/poly1305-internal.h (POLY1305_USE_NEON)
(POLY1305_NEON_BLOCKSIZE, POLY1305_NEON_STATESIZE)
(POLY1305_NEON_ALIGNMENT): New.
* cipher/poly1305.c [POLY1305_USE_NEON]
(_gcry_poly1305_armv7_neon_init_ext)
(_gcry_poly1305_armv7_neon_finish_ext)
(_gcry_poly1305_armv7_neon_blocks, poly1305_armv7_neon_ops): New.
(_gcry_poly1305_init) [POLY1305_USE_NEON]: Select NEON implementation
if HWF_ARM_NEON set.
* configure.ac [neonsupport=yes]: Add 'poly1305-armv7-neon.lo'.
--
Add Andrew Moon's public domain NEON implementation of Poly1305. Original
source is available at: https://github.com/floodyberry/poly1305-opt
Benchmark on Cortex-A8 (--cpu-mhz 1008):
Old:
| nanosecs/byte mebibytes/sec cycles/byte
POLY1305 | 12.34 ns/B 77.27 MiB/s 12.44 c/B
New:
| nanosecs/byte mebibytes/sec cycles/byte
POLY1305 | 2.12 ns/B 450.7 MiB/s 2.13 c/B
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Diffstat (limited to 'cipher/poly1305.c')
| -rw-r--r-- | cipher/poly1305.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/cipher/poly1305.c b/cipher/poly1305.c index fe241c1f..28dbbf8f 100644 --- a/cipher/poly1305.c +++ b/cipher/poly1305.c @@ -76,6 +76,25 @@ static const poly1305_ops_t poly1305_amd64_avx2_ops = { #endif +#ifdef POLY1305_USE_NEON + +void _gcry_poly1305_armv7_neon_init_ext(void *state, const poly1305_key_t *key); +unsigned int _gcry_poly1305_armv7_neon_finish_ext(void *state, const byte *m, + size_t remaining, + byte mac[16]); +unsigned int _gcry_poly1305_armv7_neon_blocks(void *ctx, const byte *m, + size_t bytes); + +static const poly1305_ops_t poly1305_armv7_neon_ops = { + POLY1305_NEON_BLOCKSIZE, + _gcry_poly1305_armv7_neon_init_ext, + _gcry_poly1305_armv7_neon_blocks, + _gcry_poly1305_armv7_neon_finish_ext +}; + +#endif + + #ifdef HAVE_U64_TYPEDEF /* Reference unoptimized poly1305 implementation using 32 bit * 32 bit = 64 bit @@ -661,6 +680,10 @@ _gcry_poly1305_init (poly1305_context_t * ctx, const byte * key, if (features & HWF_INTEL_AVX2) ctx->ops = &poly1305_amd64_avx2_ops; #endif +#ifdef POLY1305_USE_NEON + if (features & HWF_ARM_NEON) + ctx->ops = &poly1305_armv7_neon_ops; +#endif (void)features; buf_cpy (keytmp.b, key, POLY1305_KEYLEN); |