Is there a way to XOR horizontally an AVX register—specifically, to XOR the four 64-bit components of a 256-bit register?
The goal is to get the XOR of all 4 64-bit components of an AVX register. It would essentially be doing the same thing as a horizontal add (_mm256_hadd_epi32()), except that I want to XOR instead of ADD.
The scalar code is:
inline uint64_t HorizontalXor(__m256i t) {
return t.m256i_u64[0] ^ t.m256i_u64[1] ^ t.m256i_u64[2] ^ t.m256i_u64[3];
}