Intel Extensible Firmware Interface - Manual (Page 805)

EFI Byte Code Virtual Machine
Version 1.10 12/01/02 19-31
JMP8
SYNTAX:
JMP8{cs|cc} Immed8
DESCRIPTION:
Conditionally or unconditionally jump to a relative offset and continue execution. The offset is a
signed one-byte offset specified in the number of words. The offset is relative to the start of the
following instruction.
OPERATION:
IP = IP + SizeOfThisInstruction + (Immed8 * 2)
Table 19-22 JMP8 Instruction Encoding
BYTE DESCRIPTION
Bit Description
7 0 = Unconditional jump
1 = Conditional jump
6 0 = Jump if Flags.C is clear (cc)
1 = Jump if Flags.C is set (cs)
0
0..5 Opcode = 0x02
1 Immediate data (signed word offset)
BEHAVIORS AND RESTRICTIONS:
• If the jump is unconditional, then Byte0:Bit6 (condition) is ignored