[se55y]

BCF STATUS,C
BTFSC INP
BSF STATUS,C
RLF msg+.15,1
RLF TMP,1 ;save STATUS,C
RRF TMP,0
RLF CRC8,1
MOVLW POLY
BTFSC STATUS,C
XORWF CRC8,1
RRF TMP,1 ;restore STATUS,C
RLF msg+.14,1
RLF msg+.13,1
...