Datasheet

 1999-2012 Microchip Technology Inc. DS40192D-page 45
PIC16C505
INCF Increment f
Syntax: [
label ] INCF f,d
Operands: 0  f  31
d  [0,1]
Operation: (f) + 1  (dest)
Status Affected: Z
Encoding:
0010 10df ffff
Description: The contents of register 'f' are
incremented. If 'd' is 0, the result is
placed in the W register. If 'd' is 1,
the result is placed back in register
'f'.
Words: 1
Cycles: 1
Example:
INCF CNT,
1
Before Instruction
CNT = 0xFF
Z=0
After Instruction
CNT = 0x00
Z=1
INCFSZ Increment f, Skip if 0
Syntax: [
label ] INCFSZ f,d
Operands: 0  f  31
d  [0,1]
Operation: (f) + 1  (dest), skip if result = 0
Status Affected: None
Encoding:
0011 11df ffff
Description: The contents of register 'f' are
incremented. If 'd' is 0, the result is
placed in the W register. If 'd' is 1,
the result is placed back in register
'f'.
If the result is 0, then the next
instruction, which is already
fetched, is discarded and a NOP is
executed instead making it a two
cycle instruction.
Words: 1
Cycles: 1(2)
Example:
HERE INCFSZ CNT, 1
GOTO LOOP
CONTINUE 


Before Instruction
PC = address (HERE)
After Instruction
CNT = CNT + 1;
if CNT = 0,
PC = address (CONTINUE);
if CNT  0,
PC = address (HERE +1)