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| author | David Monniaux <david.monniaux@univ-grenoble-alpes.fr> | 2019-03-29 06:57:23 +0100 |
|---|---|---|
| committer | David Monniaux <david.monniaux@univ-grenoble-alpes.fr> | 2019-03-29 06:57:23 +0100 |
| commit | 38c676f5591b53f34eb96eb1772bb6165763263d (patch) | |
| tree | c0efafd8de25a1753ec71efa2cf263cd939b065f /test/monniaux/bitsliced-tea | |
| parent | cea4f858490678f6cc1eeddec04f7ed5dc9f5c19 (diff) | |
| download | compcert-kvx-38c676f5591b53f34eb96eb1772bb6165763263d.tar.gz compcert-kvx-38c676f5591b53f34eb96eb1772bb6165763263d.zip | |
bitsliced-tea slightly more efficient with ternaries at some places
Diffstat (limited to 'test/monniaux/bitsliced-tea')
| -rw-r--r-- | test/monniaux/bitsliced-tea/bstea.c | 8 | ||||
| -rw-r--r-- | test/monniaux/bitsliced-tea/bstea.h | 14 |
2 files changed, 18 insertions, 4 deletions
diff --git a/test/monniaux/bitsliced-tea/bstea.c b/test/monniaux/bitsliced-tea/bstea.c index c20c169c..43e29d45 100644 --- a/test/monniaux/bitsliced-tea/bstea.c +++ b/test/monniaux/bitsliced-tea/bstea.c @@ -86,7 +86,7 @@ void encrypt(parallel_blocks_t v, const parallel_keys_t k, unsigned int r) * in the expansion of multiples of 32/golden-ratio, * or 32/(1+sqrt(5)/2 */ - ai = (sum & (1<<i)) ? VECTOR_AT_ONE : VECTOR_AT_ZERO; + ai = TERNARY((sum & (1<<i)), VECTOR_AT_ONE, VECTOR_AT_ZERO); bi = v[offset_v1 + i]; aandb = ai & bi; axorb = ai ^ bi; @@ -147,7 +147,7 @@ void encrypt(parallel_blocks_t v, const parallel_keys_t k, unsigned int r) carry = 0; for (i = 0;i < 32;++i) { /* VECTOR_AT_ONE where the ith bit of the sum is set */ - ai = (sum & (1<<i)) ? VECTOR_AT_ONE : VECTOR_AT_ZERO; + ai = TERNARY((sum & (1<<i)), VECTOR_AT_ONE, VECTOR_AT_ZERO); bi = v[offset_v0 + i]; aandb = ai & bi; axorb = ai ^ bi; @@ -261,7 +261,7 @@ void decrypt(parallel_blocks_t v, const parallel_keys_t k, unsigned int r) carry = 0; for (i = 0;i < 32;++i) { /* VECTOR_AT_ONE where the ith bit of the sum is set */ - ai = (sum & (1<<i)) ? VECTOR_AT_ONE : VECTOR_AT_ZERO; + ai = TERNARY((sum & (1<<i)), VECTOR_AT_ONE, VECTOR_AT_ZERO); bi = v[offset_v0 + i]; aandb = ai & bi; axorb = ai ^ bi; @@ -323,7 +323,7 @@ void decrypt(parallel_blocks_t v, const parallel_keys_t k, unsigned int r) carry = 0; for (i = 0;i < 32;++i) { /* VECTOR_AT_ONE where the ith bit of the sum is set */ - ai = (sum & (1<<i)) ? VECTOR_AT_ONE : VECTOR_AT_ZERO; + ai = TERNARY((sum & (1<<i)), VECTOR_AT_ONE, VECTOR_AT_ZERO); bi = v[offset_v1 + i]; aandb = ai & bi; axorb = ai ^ bi; diff --git a/test/monniaux/bitsliced-tea/bstea.h b/test/monniaux/bitsliced-tea/bstea.h index 305bd403..fa767996 100644 --- a/test/monniaux/bitsliced-tea/bstea.h +++ b/test/monniaux/bitsliced-tea/bstea.h @@ -6,6 +6,20 @@ #include "bstea_wordsize.h" +static inline long compcert_ternary_signedl(long x, long v0, long v1) { + return ((-(x==0)) & v0) | ((-(x!=0)) & v1); +} + +static inline uint32_t compcert_ternary(uint32_t x, uint32_t v0, uint32_t v1) { + return compcert_ternary_signedl(x, v0, v1); +} + +#if defined(__K1C__) +#define TERNARY(x, v1, v0) compcert_ternary((x), (v0), (v1)) +#else +#define TERNARY(x, v1, v0) ((x) ? (v1) : (v0)) +#endif + #define TEA_ROUNDS 32 #define TEA_BLOCK_SIZE 64 |