Specifications

Intel
®
64 and IA-32 Architectures Software Developer’s Manual Documentation Changes 91
Documentation Changes
MOV—Move to/from Debug Registers
Instruction Operand Encoding
...
MOVAPD—Move Aligned Packed Double-Precision Floating-Point Values
Instruction Operand Encoding
...
Opcode Instruction Op/
En
64-Bit
Mode
Compat/
Leg Mode
Description
0F 21/r MOV r32, DR0–
DR7
A N.E. Valid Move debug register to r32
0F 21/r MOV r64, DR0–
DR7
A Valid N.E. Move extended debug
register to r64.
0F 23 /r MOV DR0–DR7,
r32
AN.E. Valid Move r32 to debug register
0F 23 /r MOV DR0–DR7,
r64
AValid N.E. Move r64 to extended
debug register.
Op/En Operand 1 Operand 2 Operand 3 Operand 4
A ModRM:reg (w) ModRM:r/m (r) NA NA
Opcode Instruction Op/
En
64-Bit
Mode
Compat/
Leg Mode
Description
66 0F 28 /r MOVAPD xmm1,
xmm2/m128
A Valid Valid Move packed double-
precision floating-point
values from xmm2/m128 to
xmm1.
66 0F 29 /r MOVAPD
xmm2/m128,
xmm1
B Valid Valid Move packed double-
precision floating-point
values from xmm1 to
xmm2/m128.
Op/En Operand 1 Operand 2 Operand 3 Operand 4
A ModRM:reg (w) ModRM:r/m (r) NA NA
B ModRM:r/m (w) ModRM:reg (r) NA NA