_mm_mask_shuffle_ps
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512F
Header File
immintrin.h
Instruction
VSHUFPS xmm {k}, xmm, xmm, imm8
Synopsis
 _mm_mask_shuffle_ps(__m128 src, __mmask8 k, __m128 a, __m128 b, const int imm8);
Description
Shuffle single-precision (32-bit) floating-point elements in "a" using the control in "imm8", and store the results in "dst" using writemask "k" (elements are copied from "src" when the corresponding mask bit is not set).
Operation
DEFINE SELECT4(src, control) {
	CASE(control[1:0]) OF
	0:	tmp[31:0] := src[31:0]
	1:	tmp[31:0] := src[63:32]
	2:	tmp[31:0] := src[95:64]
	3:	tmp[31:0] := src[127:96]
	ESAC
	RETURN tmp[31:0]
}
tmp_dst[31:0] := SELECT4(a[127:0], imm8[1:0])
tmp_dst[63:32] := SELECT4(a[127:0], imm8[3:2])
tmp_dst[95:64] := SELECT4(b[127:0], imm8[5:4])
tmp_dst[127:96] := SELECT4(b[127:0], imm8[7:6])
FOR j := 0 to 3
	i := j*32
	IF k[j]
		dst[i+31:i] := tmp_dst[i+31:i]
	ELSE
		dst[i+31:i] := src[i+31:i]
	FI
ENDFOR
dst[MAX:128] := 0