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pull/748/head
Jeffrey Walton 2018-11-14 08:24:52 -05:00
parent 7c9858f89c
commit 5b9b9b8d08
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1 changed files with 6 additions and 6 deletions
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12
chacha_simd.cpp
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@ -302,13 +302,13 @@ inline uint32x4_p VectorAdd64(const uint32x4_p& a, const uint32x4_p& b)
#if (_ARCH_PWR8 || _ARCH_PWR9) #if (_ARCH_PWR8 || _ARCH_PWR9)
return (uint32x4_p)vec_add((uint64x2_p)a, (uint64x2_p)b); return (uint32x4_p)vec_add((uint64x2_p)a, (uint64x2_p)b);
#else #else
// The carry mask selects carries from elements 1 and 3 and sets remaining // The carry mask selects carries from elements 1 and 3 and sets remaining
// elements to 0. The mask also shifts the carried values left by 4 bytes // elements to 0. The mask also shifts the carried values left by 4 bytes
// so the carries are added to elements 0 and 2. // so the carries are added to elements 0 and 2.
const uint8x16_p cmask = {4,5,6,7, 16,16,16,16, 12,13,14,15, 16,16,16,16}; const uint8x16_p cmask = {4,5,6,7, 16,16,16,16, 12,13,14,15, 16,16,16,16};
const uint32x4_p zero = {0, 0, 0, 0}; const uint32x4_p zero = {0, 0, 0, 0};
uint32x4_p cy = vec_addc(a, b); uint32x4_p cy = vec_addc(a, b);
cy = vec_perm(cy, zero, cmask); cy = vec_perm(cy, zero, cmask);
return vec_add(vec_add(a, b), cy); return vec_add(vec_add(a, b), cy);
#endif #endif