Intel Extensible Firmware Interface - Manual (Page 815)

EFI Byte Code Virtual Machine
Version 1.10 12/01/02 19-41
MOVn
SYNTAX:
MOVn{w|d} {@}R
1
{Index16|32}, {@}R
2
{Index16|32}
DESCRIPTION:
This instruction loads an unsigned natural value from Operand 2 and stores the value to Operand 1.
Both operands can be indexed, though both operand indexes are the same size. The operand
index(s) can be 16 bits (w) or 32 bits (d).
OPERATION:
Operand1 <= (UINTN)Operand2
Table 19-29. MOVn Instruction Encoding
BYTE DESCRIPTION
Bit Description
7 0 = Operand 1 index absent
1 = Operand 1 index present
0
6 0 = Operand 2 index absent
1 = Operand 2 index present
0..5 0x32 = MOVnw opcode
0x33 = MOVnd opcode
Bit Description
7 0 = Operand 2 direct
1 = Operand 2 indirect
4..6 Operand 2
3 0 = Operand 1 direct
1 = Operand 1 indirect
1
0..2 Operand 1
2..3 Optional Operand 1 16-bit index
2..3/4..5 Optional Operand 2 16-bit index
2..5 Optional Operand 1 32-bit index
2..5/6..9 Optional Operand 2 32-bit index