IP2022 User’s Manual—Instruction Set Architecture www.ubicom.com 131 CSNE W,fr Compare W,fr then Skip if Not Equal Operation: fr - W; if result is nonzero, skip next instruction Bits affected: None Opcode: 0100 000f ffff ffff Description: This instruction subtracts the contents of W from
the specified data memory location and discards
the result. The data memory location and W are
left unchanged. If the result is nonzero (i.e. W and
the literal are not equal), the following instruction
is  skipped.  The  STATUS  register  bits  are  not
updated. Cycles: 1 Example: csne  w,0x1F0;compare W against ;register 0x1F0 ret ;if equal, return nop ;else, skip to here This example compares the contents of W with
the contents of data memory location 0x1F0. If W
and  the  data  memory  location  hold  the  same
contents,  then  the  nop  instruction  is  executed,
otherwise the ret instruction is executed.