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+15% boost with non-AES CPU

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Performance boost validated on Core 2 Quad processor under Windows 10.
But it's Windows/MS Visual C++ specific.
This commit is contained in:
Foudge 2018-01-20 10:43:56 +01:00
parent f210708f3b
commit 9bceb65ad8
1 changed files with 11 additions and 4 deletions
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7
src/crypto/soft_aes.h
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@ -91,10 +91,17 @@ alignas(16) const uint8_t saes_sbox[256] = saes_data(saes_h0);
static inline __m128i soft_aesenc(__m128i in, __m128i key)
{
#if defined(_MSC_VER)
const uint32_t x0 = in.m128i_u32[0];
const uint32_t x1 = in.m128i_u32[1];
const uint32_t x2 = in.m128i_u32[2];
const uint32_t x3 = in.m128i_u32[3];
#else
const uint32_t x0 = _mm_cvtsi128_si32(in);
const uint32_t x1 = _mm_cvtsi128_si32(_mm_shuffle_epi32(in, 0x55));
const uint32_t x2 = _mm_cvtsi128_si32(_mm_shuffle_epi32(in, 0xAA));
const uint32_t x3 = _mm_cvtsi128_si32(_mm_shuffle_epi32(in, 0xFF));
#endif
__m128i out = _mm_set_epi32(
(saes_table[0][x3 & 0xff] ^ saes_table[1][(x0 >> 8) & 0xff] ^ saes_table[2][(x1 >> 16) & 0xff] ^ saes_table[3][x2 >> 24]),