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This commit is contained in:
Jeffrey Walton 2018-10-31 02:42:25 -04:00
parent a19385a684
commit 7c5da3e1ca
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GPG Key ID: B36AB348921B1838
2 changed files with 8 additions and 3 deletions
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7
blake2-simd.cpp
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@ -1430,7 +1430,12 @@ inline uint64x2_p VectorShiftLeftOctet(const uint64x2_p a, const uint64x2_p b)
void BLAKE2_Compress64_POWER8(const byte* input, BLAKE2_State<word64, true>& state)
{
// Permute masks. High is element 0 (most significant), low is element 1 (least significant).
// Permute masks. High is element 0 (most significant), low is
// element 1 (least significant). We can 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 a material difference. However, the code that
// uses vec_mergeh and vec_mergel is about 880 bytes shorter.
const uint8x16_p HH_MASK = { 0,1,2,3,4,5,6,7, 16,17,18,19,20,21,22,23 };
const uint8x16_p HL_MASK = { 0,1,2,3,4,5,6,7, 24,25,26,27,28,29,30,31 };
const uint8x16_p LH_MASK = { 8,9,10,11,12,13,14,15, 16,17,18,19,20,21,22,23 };

4
ppc-simd.h
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@ -337,7 +337,7 @@ inline T VectorGetLow(const T& val)
{
//const T zero = {0};
//const uint8x16_p mask = {16,16,16,16, 16,16,16,16, 8,9,10,11, 12,13,14,15 };
//return (T)vec_perm(val, zero, mask);
//return (T)vec_perm(zero, val, mask);
return VectorShiftRight<8>(VectorShiftLeft<8>(val));
}
@ -354,7 +354,7 @@ inline T VectorGetHigh(const T& val)
{
//const T zero = {0};
//const uint8x16_p mask = {16,16,16,16, 16,16,16,16, 0,1,2,3, 4,5,6,7 };
//return (T)vec_perm(val, zero, mask);
//return (T)vec_perm(zero, val, mask);
return VectorShiftRight<8>(val);
}