I'm trying to do some inline assembly, specifically manipulating the program
counter to jump through a table based on a variable value.

There are 2 asm commands in the book that don't appear in the PIC data books
along with the rest of the commands.  They are movplw and movphw.
movplw implies move pl to w based on the syntax of the rest of the PIC
commands.  Is this correct?  If so, how do I move w to pl or add w to pl.

First, I tried :
#byte PCL =2

#asm
movf    bit,W
addwf   PCL,F
...
#endasm

I got:
Error: expression must evaluate to a constant

Then I tried:
#byte PCL=2

#asm
movplw
addwf   bit,W
movwf   PCL
...
#endasm

I got:
Error: undefined identifier