9.1.1.1 RETLW
Instruction
The RETLW
instruction can be used to provide access to tables of
constants. The recommended way to create such a table is shown in the following
example.
Accessing Table of Constants Using the
RETLW
Instruction
constants
BRW ;Add Index in W to
;program counter to
;select data
RETLW DATA0 ;Index0 data
RETLW DATA1 ;Index1 data
RETLW DATA2
RETLW DATA3
my_function
;… LOTS OF CODE…
MOVLW DATA_INDEX
call constants
;… THE CONSTANT IS IN W
The BRW
instruction eases the implementation of this type of
table.