Intel® Architecture Instruction Set Extensions Programming Reference

INSTRUCTION SET REFERENCE
VPERMPD — Permute Double-Precision Floating-Point Elements
Opcode/
Instruction
Description
Instruction Operand Encoding
Use two-bit index values in the immediate byte to select a double-precision floating-point element in the source
operand; the resultant data 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 location in the destination operand.
An attempt to execute VPERMPD encoded with VEX.L= 0 will cause an #UD exception.
Operation
VPERMPD (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
VPERMPD: __m256d _mm256_permute4x64_pd(__m256d 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 01 /r ib A V/V AVX2 Permute double-precision floating-point elements in ymm2/m256
using indexes in imm8 and store the result in ymm1.
VPERMPD ymm1, ymm2/m256,
imm8
Op/En Operand 1 Operand 2 Operand 3 Operand 4
A ModRM:reg (w) ModRM:r/m (r) NA NA
5-186 Ref. # 319433-014