Instruction Set Architecture—IP2022 User’s Manual 214 www.ubicom.com Example 1: sub    0x099,w This  example  subtracts  the  contents  of  W  from
data memory location 0x099. For example, if the
data  memory  location  holds  0x35  and  W  holds
0x06,  this  instruction  subtracts  0x06  from  0x35
and writes the result 0x2F into the data memory
location. It also sets the C bit, clears the DC bit,
and clears the Z bit. Example 2: mov    w,0x095;load W from 0x095
sub    0x097,w;subtract low bytes                          ;C = 0 for borrow out
mov    w,0x096;load W from 0x096
subc  0x098,w;subtract high bytes This example performs 16-bit subtraction of data
memory  locations  0x095  (low  byte)  and  0x096
(high  byte)  from  data  memory  locations  0x097
(low byte) and 0x098 (high byte). The  sub  instruction  subtracts  the  contents  of
0x095 from 0x097 and clears the C bit if a borrow
occurs out of bit 7, or sets the C bit otherwise. The subc instruction subtracts the contents of 0x096 from 0x098 with borrow-in using the C bit.