PIC Instruction Set Summary

Notation:

fr: one of the 80 memory ram positions implemented as 8 bit registers (File Register Set or FRS) (0 =< fr <= 4f). The first 12 are special purpose registers (SFR) and the other 68 are general purpose registers(GPR).
W: 8 bit accumulator of the Arithmetic Logic Unit (ALU)
d: mnemonic for the destination of one operation, which can be 1 ( a file register f) or 0 (the accumulator w)
k: an 8 bit literal
b: 3 bit literal identifying one bit of a byte (0: least significant bit, 7: most significant bit). Example: f(7)
addr: 11 bit literal representing an instruction address
C: Carry bit = STATUS(0)
Z: Zero bit = STATUS(2)
DC: Digit Carry bit = STATUS(1)

opr: mnemonic for one of the following binary operations:

add - addition
sub - subtraction
and - logical and
ior - logical or
xor - exclusive or

1. Copy value from/to file register or literal to/from w
Mnemonic Description Status Function Obs

movf fr, d Move file register Z fr => d see macro: mov f, d

movwf fr Move W to file register w => fr macro: mov w, fr

movlw k Move literal to W k => W macro: movl k, w

**1. Copy value from/to file register or literal to/from w**
Mnemonic	Description	Status	Function	Obs
movf fr, d	Move file register	Z	fr => d	see macro: mov f, d
movwf fr	Move W to file register		w => fr	macro: mov w, fr
movlw k	Move literal to W		k => W	macro: movl k, w

2. Logic / arithmetic instructions with a file register and w
Mnemonic Description Status Function Obs

oprwf fr,d logic / arithmetic operation
with a file register and W Z(all),C,DC
(add,sub) fr opr W => d only add, sub affect C,DC
macro: opr fr, d

**2. Logic / arithmetic instructions with a file register and w**
Mnemonic	Description	Status	Function	Obs
oprwf fr,d	logic / arithmetic operation with a file register and W	Z(all),C,DC (add,sub)	fr opr W => d	only add, sub affect C,DC macro: opr fr, d

3. Logic / arithmetic instructions with a literal and w
Mnemonic Description Status Function Obs

oprlw k logic / arimetic operation
with a literal and W Z(all),C,DC
(add,sub) k opr W => W only add, sub affect C,DC
macro:oprl k,w

**3. Logic / arithmetic instructions with a literal and w**
Mnemonic	Description	Status	Function	Obs
oprlw k	logic / arimetic operation with a literal and W	Z(all),C,DC (add,sub)	k opr W => W	only add, sub affect C,DC macro:oprl k,w

4. One operand logic / arithmetic instructions
Mnemonic Description Status Function Obs

clrw   Clear accumulator W Z 0 => W

clrf   fr Clear file register fr Z 0 => fr

decf fr,d Decrement file register fr Z fr - 1 => d

incf fr, d Increment file register fr Z fr + 1 => d

comf fr,d 1's complement file register fr Z not fr => d

rlf fr, d Rotate file register fr left thru C C C <= fr(7), fr(i) <= fr(i-1), fr(0) <= C

rrf   fr, d Rotate file register fr right thru C C C => fr(7), fr(i) => fr(i-1), fr(0) => C

bcf   fr, b Bit clear on file register fr 0 => fr(b)

bsf   fr, b Bit set on file register fr 1 => fr(b)

swapf fr,d swap halves of fr (fr(0:3) <=> fr(4:7)) => d

nop   No operation

**4. One operand logic / arithmetic instructions**
Mnemonic	Description	Status	Function	Obs
clrw	Clear accumulator W	Z	0 => W
clrf fr	Clear file register fr	Z	0 => fr
decf fr,d	Decrement file register fr	Z	fr - 1 => d
incf fr, d	Increment file register fr	Z	fr + 1 => d
comf fr,d	1's complement file register fr	Z	not fr => d
rlf fr, d	Rotate file register fr left thru C	C	C <= fr(7), fr(i) <= fr(i-1), fr(0) <= C
rrf fr, d	Rotate file register fr right thru C	C	C => fr(7), fr(i) => fr(i-1), fr(0) => C
bcf fr, b	Bit clear on file register fr		0 => fr(b)
bsf fr, b	Bit set on file register fr		1 => fr(b)
swapf fr,d	swap halves of fr		(fr(0:3) <=> fr(4:7)) => d
nop	No operation

5. Branch, Skip and Call instructions
Mnemonic Description Status Function Obs

goto    addr branch to addr addr => PC(0:10)

call    addr call routine at addr PC => TOS
addr => PC(0:10)

decfsz fr,d Decrement fr, skip if zero fr - 1 => d, skip if 0

incfsz fr,d Increment fr, skip next instr if zero fr + 1 => d, skip next instr if 0

btfsc fr,b Bit test fr, skip if clear skip next instr if fr(b) =0

btfss fr,b Bit test fr, skip if set skip next instr if fr(b)=1

return   return from subroutine TOS => PC

retlw   k return with literal in w k =>w,   TOS => PC

retfie   return from interrupt TOS => PC,    1 => GIE

**5. Branch, Skip and Call instructions**
Mnemonic	Description	Status	Function	Obs
goto addr	branch to addr		addr => PC(0:10)
call addr	call routine at addr		PC => TOS addr => PC(0:10)
decfsz fr,d	Decrement fr, skip if zero		fr - 1 => d, skip if 0
incfsz fr,d	Increment fr, skip next instr if zero		fr + 1 => d, skip next instr if 0
btfsc fr,b	Bit test fr, skip if clear		skip next instr if fr(b) =0
btfss fr,b	Bit test fr, skip if set		skip next instr if fr(b)=1
return	return from subroutine		TOS => PC
retlw k	return with literal in w		k =>w, TOS => PC
retfie	return from interrupt		TOS => PC, 1 => GIE

6. Buit-in macros for commonly used logic / arithmetic operations
Mnemonic Description Status Function Obs

addcf fr, d Add carry to fr Z btfsc 3, 0 incf f,d

subcf fr, d Subtract carry from fr Z btfsc 3, 0 decf fr,d

negf fr, d Negate file register fr Z comf fr, 1 incf fr,d

b   addr Branch to addr goto    adddr

bz   addr Branch on Zero to addr btfsc 3, 2    goto addr

bnz   addr Branch on No Zero to addr btfss 3, 2    goto addr

bc   addr Branch on Carry to addr btfsc 3, 0    goto addr

bnc   addr Branch on No Carry to addr btfss 3, 0    goto addr

skpc Skip on Carry btfss 3, 0

skpnc Skip on No Carry btfsc 3, 0

skpz Skip on Zero btfss 3, 2

skpnz Skip on No Zero btfsc 3, 2

clrz   Clear Zero flag bcf    3, 2

setz   Set Zero flag bsf    3, 2

clrc   Clear Carry flag bcf    3, 0

setc   Set Carry flag bsf    3, 0

tstf   fr Test file register fr Z movf  fr, f

xchg fr1, fr2 Exchange file regs fr1 & fr2 Z movf fr2, 0 xorwf  fr1,1
xorwf fr1, 0 xorwf  fr1, 1
movwf fr2 Macro uses only w
as temporary variable
See:mymacros.inc

decbnz fr,addr Decrement file register,
if # 0 branch to addr decfsz  fr
goto addr In:mymacros.inc