_mm256_mask_extractf32x4_ps
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512F
Header File
Instruction
VEXTRACTF32X4 xmm {k}, ymm, imm8
Synopsis
_mm256_mask_extractf32x4_ps(__m128 src, __mmask8 k, __m256 a, int imm8);
Description
Extract 128 bits (composed of 4 packed single-precision (32-bit) floating-point elements) from "a", selected with "imm8", and store the results in "dst" using writemask "k" (elements are copied from "src" when the corresponding mask bit is not set).
Operation
CASE imm8[0] OF
0: tmp[127:0] := a[127:0]
1: tmp[127:0] := a[255:128]
ESAC
FOR j := 0 to 3
i := j*32
IF k[j]
dst[i+31:i] := tmp[i+31:i]
ELSE
dst[i+31:i] := src[i+31:i]
FI
ENDFOR
dst[MAX:128] := 0