_mm512_reduce_or_epi64
Classification
AVX-512, Logical, CPUID Test: AVX512F
Header File
immintrin.h
Synopsis
 _mm512_reduce_or_epi64(__m512i a);
Description
Reduce the packed 64-bit integers in "a" by bitwise OR. Returns the bitwise OR of all elements in "a".
Operation
DEFINE REDUCE_OR(src, len) {
	IF len == 2
		RETURN src[63:0] OR src[127:64]
	FI
	len := len / 2
	FOR j:= 0 to (len-1)
		i := j*64
		src[i+63:i] := src[i+63:i] OR src[i+64*len+63:i+64*len]
	ENDFOR
	RETURN REDUCE_OR(src[64*len-1:0], len)
}
dst[63:0] := REDUCE_OR(a, 8)