Thank you Claudio, I will try that way.


-----Original Message-----
From: Claudio Tagliola <tagliola@SOFTHOME.NET>
To: PICLIST@MITVMA.MIT.EDU <PICLIST@MITVMA.MIT.EDU>
Date: viernes 19 de julio de 2002 10:03
Subject: Re: [PIC]: Code optimization


>Hi,
>
>Start out with two dummy variables:
>
>template        000000AB
>mask            11111100
>
>Do a loop where you rotate left both variables by the count of number.
>
>After the loop:
>
>var = var AND mask              ; clear out location of AB
>var = var XOR template          ; put AB into var
>
>Solution is faster with less code but more memory usage.
>
>Regards,
>Claudio
>
>-----Oorspronkelijk bericht-----
>Van: pic microcontroller discussion list
>[mailto:PICLIST@MITVMA.MIT.EDU]Namens Carlos Ojea
>Verzonden: vrijdag 19 juli 2002 10:36
>Aan: PICLIST@MITVMA.MIT.EDU
>Onderwerp: [PIC]: Code optimization
>
>
>Hello :
>
>I want to optimize this :
>
>If number = 2 then var = xxABxxxx
>If number = 1 then var = xxxxABxx
>If number = 0 then var = xxxxxxAB
>
>I wrote this large code (assuming A is '0' and B is '1'):
>
>movlw 0x02
>BANKSEL number
>xorwf number, W
>bz n2          ; number is 2, so branch to n2
>movlw 0x01
>xorwf number, W
>bz n1          ; number is 1, branch to n1
>bcf var, 0x01  ;number is 0, write xxxxxxAx
>bsf var, 0x00  ; write xxxxxxxB
>goto finish
>
>
>n2
>bcf var, 0x05  ; write xxAxxxxx
>bsf var, 0x04  ; write xxxBxxxx
>goto finish
>
>
>n1
>bcf var, 0x03  ; write xxxxAxxx
>bsf var, 0x02  ; write xxxxxBxx
>
>
>finish
>...
>...
>...
>more code
>...
>...
>...
>
>
>Anyone knows how to optimize that?
>
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