I don't pretend to be a C guru, but this seems simple enough.
(I didn't read the whole thread, I could be missing something)

Isn't this just

int My_Table[4] =3D {0x84,0x04,0x40,0x80};

then later the call is something like

NewVal =3D My_Table[(Index_Val & 0x03)];


A quick bit of Google reveals this link
http://embeddedgurus.com/stack-overflow/2010/01/a-tutorial-on-lookup-tables=
-in-c/
Seems relevant.

-Denny


Hello all,
>      Could someone please help me do this in C?
> Thanks,
> rich!
>
> On 9/14/2015 11:14 AM, Byron Jeff wrote:
> > Richard,
> >
> > Your description below screams table. Since it's only 2 bits, the table
> > would be 4 entries long:
> >
> > TableA: ; W is input. Returns table entry in W.
> >       andlw   0x3     ; make sure only 2 lowest bits are used
> >       addwf   PC,F    ; jump to appropriate table entry
> >       retlw   0x82    ; return 1001 in bits 7-6,3-2 if input is 00
> >       retlw   0x04    ; return 0010 in bits 7-6,3=3D2 if input is 01
> >       retlw   0x40    ; return 0100 in bits 7-6,3=3D2 if input is 10
> >       retlw   0x80    ; return 1000 in bits 7-6,3=3D2 if input is 11
> >
>
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