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

INSTRUCTION SET OPCODES AND CLOCK CYCLES

Table D-2. Instruction Set Summary (Continued)

Function		Format			Clocks	Notes
ARITHMETIC INSTRUCTIONS (Continued)
SUB = Subtract
reg/memory with register to either	0 0 1 0 1 0 d w	mod reg r/m			3/10
immediate from register/memory
	1 0 0 0 0 0 s w	mod 101 r/m	data	data if sw=01	4/16
immediate from accumulator
	0 0 0 1 1 1 0 w	data	data if w=1		3/4	(1)
SBB = Subtract with borrow
reg/memory with register to either	0 0 0 1 1 0 d w	mod reg r/m			3/10
immediate from register/memory
	1 0 0 0 0 0 s w	mod 011 r/m	data	data if sw=01	4/16
immediate from accumulator
	0 0 0 1 1 1 0 w	data	data if w=1		3/4	(1)
DEC = Decrement
register/memory	1 1 1 1 1 1 1 w	mod 001 r/m			3/15
register
	0 1 0 0 1 reg				3
NEG = Change sign
	1 1 1 1 0 1 1 w	mod reg r/m			3
CMP = Compare
register/memory with register	0 0 1 1 1 0 1 w	mod reg r/m			3/10
register with register/memory
	0 0 1 1 1 0 0 w	mod reg r/m			3/10
immediate with register/memory
	1 0 0 0 0 0 s w	mod 111 r/m	data	data if sw=01	3/10
immediate with accumulator
	0 0 1 1 1 1 0 w	data	data if w=1		3/4	(1)
AAS = ASCII adjust for subtraction
	0 0 1 1 1 1 1 1				7
DAS = Decimal adjust for subtraction
	0 0 1 0 1 1 1 1				4
MUL = multiply (unsigned)
	1 1 1 1 0 1 1 w	mod 100 r/m
register-byte					26-28
register-word					35-37
memory-byte					32-34
memory-word					41-43
IMUL = Integer multiply (signed)	1 1 1 1 0 1 1 w	mod 101 r/m
register-byte					25-28
register-word					34-37
memory-byte					31-34
memory-word					40-43
integer immediate multiply (signed)	0 1 1 0 1 0 s 1	mod reg r/m	data	data if s=0	22-25/
					29-32

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-4