Intel® Architecture Instruction Set Extensions Programming Reference

VPERM2I128 — Permute Integer Values
Opcode/
Instruction
Description
Op/
En
64/32
-bit
Mode
CPUID
Feature
Flag
Description
Instruction Operand Encoding
INSTRUCTION SET REFERENCE
VEX.NDS.256.66.0F3A.W0 46 /r ib A V/V AVX2 Permute 128-bit integer data in ymm2 and ymm3/mem using
controls from imm8 and store result in ymm1.
VPERM2I128 ymm1, ymm2,
ymm3/m256, imm8
Op/En Operand 1 Operand 2 Operand 3 Operand 4
A ModRM:reg (w) VEX.vvvv ModRM:r/m (r) NA
Permute 128 bit integer data from the first source operand (second operand) and second source operand (third
operand) using bits in the 8-bit immediate and store results in the destination operand (first operand). The first
source operand is a YMM register, the second source operand is a YMM register or a 256-bit memory location, and
the destination operand is a YMM register.
SRC2
SRC1
DEST
Y1
X1
X0, X1, Y0, or Y1
Figure 5-12. VPERM2I128 Operation
Imm8[1:0] select the source for the first destination 128-bit field, imm8[5:4] select the source for the second
destination field. If imm8[3] is set, the low 128-bit field is zeroed. If imm8[7] is set, the high 128-bit field is
zeroed.
VEX.L must be 1, otherwise the instruction will #UD.
Ref. # 319433-014 5-189
Y0
X0
X0, X1, Y0, or Y1