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faster CipherBlock XOR implementation for non-AVX

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orignal 2018-10-27 18:41:05 -04:00
parent d034dab265
commit a309eb9f3c
1 changed files with 11 additions and 3 deletions
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14
libi2pd/Crypto.h
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@ -124,9 +124,17 @@ namespace crypto
else
#endif
{
// TODO: implement it better
for (int i = 0; i < 16; i++)
buf[i] ^= other.buf[i];
if (((size_t)buf | (size_t)other.buf) & 0x03) // multiple of 4 ?
{
// we are good to cast to uint32_t *
for (int i = 0; i < 4; i++)
((uint32_t *)buf)[i] ^= ((uint32_t *)other.buf)[i];
}
else
{
for (int i = 0; i < 16; i++)
buf[i] ^= other.buf[i];
}
}
}
};