picbasicpro with rotation

[cesurcelik]

hi all.
i want to rotate 48 bits data with picbasic pro,but i don't know how to do that.
if someone helped me about it ,i'd appreciate it.
thank you in advance.

[Bruce]

You might want to run this through the MPLAB simulator to see how it works.

   WordA  VAR WORD BANK0 SYSTEM
   WordB  VAR WORD BANK0 SYSTEM
   WordC  VAR WORD BANK0 SYSTEM
   Counts VAR BYTE BANK0 SYSTEM

   GOTO Main        ' jump to Main

   ' shifts bits left from WordA to WordB to WordC with highest bit
   ' in WordC being trashed.
ASM
Rotate  macro
    rlf WordA,f     ; msb of lowbyte into carry
    rlf WordA+1,f   ; carry into lsb of highbyte, msb of highbyte into carry
    rlf WordB,f     ; carry into lsb of lowbyte, msb of lowbyte into carry
    rlf WordB+1,f   ; carry into lsb of highbyte, msb of highbyte into carry
    rlf WordC,f     ; carry into lsb of lowbyte, msb of lowbyte into carry
    rlf WordC+1,f   ; carry into lsb of highbyte, msb of highbyte into carry
    bcf STATUS,C    ; trash msb of WordC to prevent shifting into WordA lsb
    decfsz Counts,f ; decrement shift counter
    goto $-D'8'     ; keep shifting until Counts = 0
    endm
ENDASM


Main:
    ' starting 48-bit value = 1
    WordA = 1     ' load low word
    WordB = 0     ' load mid word
    WordC = 0     ' load high word
    Counts = 47   ' shift 48-bit value left by Counts
    @ Rotate      ' do it
    ' resulting 48-bit value = $800000000000
    
Here:
    GOTO Here   ' sit & spin after test
    END

This can be expanded to work on any number of variables. The only real limitation is available RAM &
PBP system variables.

[cesurcelik]

@bruce
i thank you for your reply
it works perfectly

cesur