Intel 80C186XL Instruction Set Opcodes And Clock Cycles, PROGRAM TRANSFER INSTRUCTIONS Continued

INSTRUCTION SET OPCODES AND CLOCK CYCLES

Table D-2. Instruction Set Summary (Continued)

Function		Format		Clocks	Notes
PROGRAM TRANSFER INSTRUCTIONS (Continued)
RET = Return from procedure
within segment	1 1 0 0 0 0 1 1			16
within segment adding immed to SP
	1 1 0 0 0 0 1 0	data-low	data-high	18
intersegment
	1 1 0 0 1 0 1 1			22
intersegment adding immed to SP
	1 1 0 0 1 0 1 0	data-low	data-high	25
JMP = Unconditional jump
short/long	1 1 1 0 1 0 1 1	disp-low		14
direct within segment
	1 1 1 0 1 0 0 1	disp-low	disp-high	14
reg/memory indirect within segment
	1 1 1 1 1 1 1 1	mod 100 r/m		26
indirect intersegment
	1 1 1 1 1 1 1 1	mod 101 r/m	(mod ?11)	11/17
direct intersegment
	1 1 1 0 1 0 1 0	segment offset		14
		selector
Iteration Control
LOOP = Loop CX times	1 1 1 0 0 0 1 0	disp		6/16	(2)
LOOPZ/LOOPE =Loop while zero/equal
	1 1 1 0 0 0 0 1	disp		5/16	(2)
LOOPNZ/LOOPNE =
	1 1 1 0 0 0 0 0	disp		5/16	(2)
Loop while not zero/not equal
JCXZ = Jump if CX = zero
	1 1 1 0 0 0 1 1	disp		6/16	(2)
Interrupts
INT = Interrupt
Type specified	1 1 0 0 1 1 0 1	type		47
Type 3
	1 1 0 0 1 1 0 0			45
INTO = Interrupt on overflow
	1 1 0 0 1 1 1 0			48/4	(3)
BOUND = Detect value out of range	0 1 1 0 0 0 1 0	mod reg r/m		33-35
IRET = Interrupt return	1 1 0 0 1 1 1 1			28

NOTES:

1.Clock cycles are given for 8-bit/16-bit operations.

2.Clock cycles are given for jump not taken/jump taken.

3.Clock cycles are given for interrupt taken/interrupt not taken.

4.If TEST = 0

Shading indicates additions and enhancements to the 8086/8088 instruction set. See Appendix A, “80C186 Instruction Set Additions and Extensions,” for details.

D-8