_mm256_mask_max_pd
Classification
AVX-512, Arithmetic, CPUID Test: AVX512F
Header File
immintrin.h
Instruction
VMAXPD ymm {k}, ymm, ymm
Synopsis
 _mm256_mask_max_pd(__m256d src, __mmask8 k, __m256d a, __m256d b);
Description
Compare packed double-precision (64-bit) floating-point elements 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). [max_float_note]
Operation
FOR j := 0 to 3
	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:256] := 0