Intel® Architecture Instruction Set Extensions Programming Reference

INSTRUCTION SET REFERENCE
VPERMQ — Qwords Element Permutation
Opcode/
Instruction
Description
Instruction Operand Encoding
Use two-bit index values in the immediate byte to select a qword element in the source operand, the resultant
qword value from the source operand is copied to the corresponding element of the destination operand in the
order of the index field. Note that this instruction permits a qword in the source operand to be copied to multiple
locations in the destination operand.
An attempt to execute VPERMQ encoded with VEX.L= 0 will cause an #UD exception.
Operation
VPERMQ (VEX.256 encoded version)
DEST[63:0] (SRC[255:0] >> (IMM8[1:0] * 64))[63:0];
DEST[127:64] (SRC[255:0] >> (IMM8[3:2] * 64))[63:0];
DEST[191:128] (SRC[255:0] >> (IMM8[5:4] * 64))[63:0];
DEST[255:192] (SRC[255:0] >> (IMM8[7:6] * 64))[63:0];
Intel C/C++ Compiler Intrinsic Equivalent
VPERMQ: __m256i _mm256_permute4x64_epi64(__m256i a, int control)
SIMD Floating-Point Exceptions
None
Other Exceptions
Op/
En
See Exceptions Type 4; additionally
#UD If VEX.L = 0.
64/32
-bit
Mode
CPUID
Feature
Flag
Description
VEX.256.66.0F3A.W1 00 /r ib A V/V AVX2 Permute qwords in ymm2/m256 using indexes in imm8 and store
the result in ymm1.
VPERMQ ymm1, ymm2/m256,
imm8
Op/En Operand 1 Operand 2 Operand 3 Operand 4
A ModRM:reg (w) ModRM:r/m (r) NA NA
5-188 Ref. # 319433-014