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pull/733/head
Jeffrey Walton 2018-11-01 13:32:42 -04:00
parent bcfd8444e5
commit c6d2729954
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blake2-simd.cpp
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@ -1465,8 +1465,9 @@ void BLAKE2_Compress64_POWER8(const byte* input, BLAKE2_State<word64, true>& sta
// Permute masks. High is element 0 (most significant), low is
// element 1 (least significant). We use vec_mergeh(a,b) for
// vec_perm(a,b,HH_MASK) and vec_mergel(a,b) for vec_perm(a,b,LL_MASK).
// Benchmarks don't show we profit up to 0.4 cpb. The code that uses
// vec_mergeh and vec_mergel is about 880 bytes shorter on ppc64le.
// Benchmarks show we profit up to 0.4 cpb. The code that uses
// vec_mergeh and vec_mergel is about 880 bytes shorter, and frees
// up two vector registers on ppc64le.
// const uint8x16_p HH_MASK = { 0,1,2,3,4,5,6,7, 16,17,18,19,20,21,22,23 };
// const uint8x16_p LL_MASK = { 8,9,10,11,12,13,14,15, 24,25,26,27,28,29,30,31 };