_mm256_mask_getexp_pd
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512F
Header File
immintrin.h
Instruction
VGETEXPPD ymm {k}, ymm
Synopsis
 _mm256_mask_getexp_pd(__m256d src, __mmask8 k, __m256d a);
Description
Convert the exponent of each packed double-precision (64-bit) floating-point element in "a" to a double-precision (64-bit) floating-point number representing the integer exponent, and store the results in "dst" using writemask "k" (elements are copied from "src" when the corresponding mask bit is not set). This intrinsic essentially calculates "floor(log2(x))" for each element.
Operation
FOR j := 0 to 3
	i := j*64
	IF k[j]
		dst[i+63:i] := ConvertExpFP64(a[i+63:i])
	ELSE
		dst[i+63:i] := src[i+63:i]
	FI
ENDFOR
dst[MAX:256] := 0