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Manual unrolling

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This commit is contained in:
Frank Denis
2017-02-27 17:03:03 +01:00
parent c6460c9e9a
commit fa89071261
1 changed files with 14 additions and 4 deletions
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src/libsodium/crypto_aead/aes256gcm/aesni/aead_aes256gcm_aesni.c
+14 -4
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@@ -101,10 +101,20 @@ aesni_encrypt1(unsigned char *out, __m128i nv, const __m128i *rkeys)
__m128i temp = _mm_xor_si128(nv, rkeys[0]);
int roundctr;
#pragma unroll(13)
for (roundctr = 1; roundctr < 14; roundctr++) {
temp = _mm_aesenc_si128(temp, rkeys[roundctr]);
}
temp = _mm_aesenc_si128(temp, rkeys[1]);
temp = _mm_aesenc_si128(temp, rkeys[2]);
temp = _mm_aesenc_si128(temp, rkeys[3]);
temp = _mm_aesenc_si128(temp, rkeys[4]);
temp = _mm_aesenc_si128(temp, rkeys[5]);
temp = _mm_aesenc_si128(temp, rkeys[6]);
temp = _mm_aesenc_si128(temp, rkeys[7]);
temp = _mm_aesenc_si128(temp, rkeys[8]);
temp = _mm_aesenc_si128(temp, rkeys[9]);
temp = _mm_aesenc_si128(temp, rkeys[10]);
temp = _mm_aesenc_si128(temp, rkeys[11]);
temp = _mm_aesenc_si128(temp, rkeys[12]);
temp = _mm_aesenc_si128(temp, rkeys[13]);
temp = _mm_aesenclast_si128(temp, rkeys[14]);
_mm_storeu_si128((__m128i *) out, temp);
}