Datasheet

PIC16F785/HV785
DS41249E-page 134 © 2008 Microchip Technology Inc.
SUBLW Subtract W from Literal
Syntax: [label]SUBLW k
Operands: 0 ≤ k ≤ 255
Operation: k - (W) → (W)
Status
Affected:
C, DC, Z
Encoding:
11 110x kkkk kkkk
Description: The W register is subtracted (2’s
complement method) from the
eight-bit literal ‘k’. The result is
placed in the W register.
C = 1; result is positive or zero
C = 0; result is negative
SUBWF Subtract W from f
Syntax: [label] SUBWF f,d
Operands: 0 ≤ f ≤ 127
d ∈ [0,1]
Operation: (f) - (W) → (dest)
Status
Affected:
C, DC, Z
Encoding:
00 0010 dfff ffff
Description: Subtract (2’s complement method)
W register from register ‘f’. If ‘d’ is
‘0’, the result is stored in the W
register. If ‘d’ is ‘1’, the result is
stored back in register ‘f’.
C = 1; result is positive or zero
C = 0; result is negative
SWAPF Swap Nibbles in f
Syntax: [ label
]
SWAPF f,d
Operands: 0 ≤ f ≤ 127
d ∈ [0,1]
Operation: (f<3:0>) → (dest<7:4>),
(f<7:4>) → (dest<3:0>)
Status
Affected:
None
Encoding:
00 1110 dfff ffff
Description: The upper and lower nibbles of
register ‘f’ are exchanged. If ‘d’
is ‘0’, the result is placed in W
register. If ‘d’ is ‘1’, the result is
placed in register ‘f’.
TRIS Load TRIS Register
Syntax: [ label ] TRIS f
Operands: 5 ≤ f ≤ 6
Operation: (W) → TRIS register f;
Status Affected: None
Encoding:
00 0000 0110 0fff
Description: The instruction is supported for
code compatibility with the
PIC16C5X products. Since TRIS
registers are readable and
writable, the user can directly
address them.
Words: 1
Cycles: 1
Example:
To maintain upward compati-
bility with future PIC
®
products, do not use this
instruction.
XORLW Exclusive OR Literal with W
Syntax: [label]XORLW k
Operands: 0 ≤ k ≤ 255
Operation: (W) .XOR. k → (W)
Status Affected: Z
Encoding:
11 1010 kkkk kkkk
Description: The contents of the W register
are XOR’ed with the eight-bit
literal ‘k’. The result is placed
in the W register.