_mm_shuffle_pi16
Classification
Header File
Instruction
PSHUFW mm, mm, imm8
Synopsis
_mm_shuffle_pi16(__m64 a, int imm8);
Description
Shuffle 16-bit integers in "a" using the control in "imm8", and store the results in "dst".
Operation
DEFINE SELECT4(src, control) {
CASE(control[1:0]) OF
0: tmp[15:0] := src[15:0]
1: tmp[15:0] := src[31:16]
2: tmp[15:0] := src[47:32]
3: tmp[15:0] := src[63:48]
ESAC
RETURN tmp[15:0]
}
dst[15:0] := SELECT4(a[63:0], imm8[1:0])
dst[31:16] := SELECT4(a[63:0], imm8[3:2])
dst[47:32] := SELECT4(a[63:0], imm8[5:4])
dst[63:48] := SELECT4(a[63:0], imm8[7:6])