Instruction Set Architecture—IP2022 User’s Manual 136 www.ubicom.com DEC W,fr Decrement fr into W Operation: W = fr - 1 Bits affected: Z Opcode: 0000 110f ffff ffff Description: This   instruction   decrements   the   value   in   the
specified register file by one and moves the 8-bit
result  into  W.  The  data  memory  location  is  left
unchanged. If the data memory location holds 0x01, the value
moved  into  W  is  0x00  and  the  Z  bit  is  set.
Otherwise, the Z bit is cleared. Cycles: 1 Example: dec     w,0x099 This example decrements the value in the data
memory location at 0x099 and moves the result
into W. For example, if the data memory location
holds 0x75, the value 0x74 is loaded into W, and
the Z bit is cleared. The data memory location still
holds 0x75 after execution of the instruction.