_mm_maskz_shuffle_epi32
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512F
Header File
immintrin.h
Instruction
VPSHUFD xmm {z}, xmm, imm8
Synopsis
 _mm_maskz_shuffle_epi32(__mmask8 k, __m128i a, _MM_PERM_ENUM imm8);
Description
Shuffle 32-bit integers in "a" using the control in "imm8", and store the results in "dst" using zeromask "k" (elements are zeroed out 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(a[127:0], imm8[5:4])
tmp_dst[127:96] := SELECT4(a[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] := 0
	FI
ENDFOR
dst[MAX:128] := 0