Need some idea to move data serially.

start 
 movwf buffer
 movlw 0x08
 movwf counter        ; counts the 8 bits 
    bcf   TX             ; set TX low
    call  BItdelay       ; delay to get a 9600 bit rate
TXLoop  
    rrf   buffer ,f      ;send one bit
    btfss STATUS ,C      ;  
    bcf   TX             ;
    btfsc STATUS ,C  ;
    bsf   TX  ;
    call  BItdelay  ;
    decfsz counter,f     ;test if all done
    goto  TXLoop  ;
    bsf   TX  ;
    call  BItdelay  ;
    return
BItdelay                 ; timing delay 

    movlw 0x17
    movwf  Count  
Wait    
    nop 
    decfsz Count ,f
    goto   Wait
    return 

 END  ; directive 'end of program'

;*****************************************************************************

;place this section before the main code

SENDREG 	EQU		0x20		;declare send buffer
BITCOUNT	EQU		0x21		;declare bit counter


;change the port/bit assignment to the pins you will be using to interface
;with the 74HC595

#define		SDO		PORTB,RB0
#define		SCK		PORTB,RB1
#define		LAT		PORTB,RB2

;*****************************************************************************

;Do this in main code to use this routine -

		movlw		<DATA>		;load W with data to be sent
		call		595Write	;send data

;or if sending data that is stored in a register, do this -

		movfw		<ADDRESS>	;load W with data to be sent
		call		595Write	;send data

;*****************************************************************************

;Place this with your subroutines

595Write	movwf		SENDREG		;load send buffer
		movlw		8		;init bit counter to 8 bits
		movwf		BITCOUNT

TXLoop		bsf		SDO		;assume MSB = 1
		btfss		SENDREG,7	;MSB = 1?
		bcf		SDO		;no, send 0
		bsf		SCK		;strobe shift clock
		bcf		SCK	
		rlf		SENDREG,F	;shift bits
		decfsz		BITCOUNT,F	;decrement bit counter
		goto		TXLoop		;keep sending until BITCOUNT = 0
		bsf		LAT		;all bits sent, strobe latch
		bcf		LAT	
		return				;done