_mm_mask_max_epi64
Classification
AVX-512, Arithmetic, CPUID Test: AVX512F
Header File
immintrin.h
Instruction
VPMAXSQ xmm {k}, xmm, xmm
Synopsis
 _mm_mask_max_epi64(__m128i src, __mmask8 k, __m128i a, __m128i b);
Description
Compare packed signed 64-bit integers in "a" and "b", and store packed maximum values in "dst" using writemask "k" (elements are copied from "src" when the corresponding mask bit is not set).
Operation
FOR j := 0 to 1
	i := j*64
	IF k[j]
		dst[i+63:i] := MAX(a[i+63:i], b[i+63:i])
	ELSE
		dst[i+63:i] := src[i+63:i]
	FI
ENDFOR
dst[MAX:128] := 0