diff options
Diffstat (limited to 'ext/lib/crypto/tinycrypt/source/utils.c')
| -rw-r--r-- | ext/lib/crypto/tinycrypt/source/utils.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/ext/lib/crypto/tinycrypt/source/utils.c b/ext/lib/crypto/tinycrypt/source/utils.c index 3338e0ca4..147d8d407 100644 --- a/ext/lib/crypto/tinycrypt/source/utils.c +++ b/ext/lib/crypto/tinycrypt/source/utils.c @@ -55,14 +55,11 @@ void _set(void *to, uint8_t val, uint32_t len) } /* - * Doubles the value of a byte for values up to 127. Original 'return - * ((a<<1) ^ ((a>>7) * 0x1b))' re-written to avoid extra multiplication which - * the compiler won't be able to optimize + * Doubles the value of a byte for values up to 127. */ uint8_t _double_byte(uint8_t a) { - return (a & MASK_MOST_SIG_BIT) ? - ((a << 1) ^ MASK_TWENTY_SEVEN) : (a << 1); + return ((a<<1) ^ ((a>>7) * MASK_TWENTY_SEVEN)); } int32_t _compare(const uint8_t *a, const uint8_t *b, size_t size) |