Siemens C16 Series Instruction Set Manual page 109

SUB
Syntax
Operation
Data Types
Description
Condition Flags
Addressing Modes
Semiconductor Group
30Mar98@15:00h
Integer Subtraction
SUB op1, op2
(op1) ← (op1) - (op2)
WORD
Performs a 2's complement binary subtraction of the source operand
specified by op2 from the destination operand specified by op1. The result
is then stored in op1.
E Z
* *
E Set if the value of op2 represents the lowest possible negative number.
Cleared otherwise. Used to signal the end of a table.
Z Set if result equals zero. Cleared otherwise.
V Set if an arithmetic underflow occurred, ie. the result cannot be repre-
sented in the specified data type. Cleared otherwise.
C Set if a borrow is generated. Cleared otherwise.
N Set if the most significant bit of the result is set. Cleared otherwise.
Mnemonic
SUB Rw , Rw
n
SUB Rw , [Rw
n
SUB Rw , [Rw
n
SUB Rw , #data3
n
SUB reg, #data16
SUB reg, mem
SUB mem, reg
C166 Family Instruction Set
V C N
* S *
Format
20 nm
m
] 28 n:10ii
i
+] 28 n:11ii
i
28 n:0###
26 RR ## ##
22 RR MM MM
24 RR MM MM
109
Instruction Description
Version 1.2, 12.97
SUB
Bytes
2
2
2
2
4
4
4