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Vectorize tail of Rijndael_UncheckedSetKey_POWER8

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Jeffrey Walton 2017-09-21 20:02:40 -04:00
parent e43c0eee74
commit 1edea5a80f
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GPG Key ID: B36AB348921B1838
1 changed files with 6 additions and 9 deletions
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15
rijndael-simd.cpp
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@ -1159,16 +1159,13 @@ void Rijndael_UncheckedSetKey_POWER8(const byte* userKey, size_t keyLen, word32*
rk += keyLen/4;
}
rk = rk_saved;
ConditionalByteReverse(BIG_ENDIAN_ORDER, rk, rk, (rounds+1)*16);
#if defined(IS_LITTLE_ENDIAN)
// VSX registers are big-endian. The entire subkey table must be byte
// reversed on little-endian systems to ensure it loads properly.
byte * ptr = reinterpret_cast<byte*>(rk);
for (unsigned int i=0; i<=rounds; i++)
ReverseByteArrayLE(ptr+i*16);
#endif // IS_LITTLE_ENDIAN
rk = rk_saved;
const uint8x16_p8 mask = ((uint8x16_p8){12,13,14,15, 8,9,10,11, 4,5,6,7, 0,1,2,3});
const uint8x16_p8 zero = {0};
for (unsigned int i=0; i<=rounds; ++i, rk+=4)
vec_vsx_st(vec_perm(vec_vsx_ld(0, (uint8_t*)rk), zero, mask), 0, (uint8_t*)rk);
#endif
}
}