Error when i change asm from pic16f877 to pic18f458. Please.

[a]

Now i will change from pic16f877 to pic 18f458 and some function like
find_parity(); is not work
below is my original in pic16f877
===================pic16f877===================
int8 find_parity(int8 data)
{
#asm
swapf data, W
xorwf data, F
rrf data, W
xorwf data, F
btfsc data, 2
incf data, F
movf data, W
andlw 1
movwf _return_
#endasm
}
===========================================

and i chand in one line because in pic18 is not have it

===================pic18f458=====================
int8 find_parity(int8 data)
{
#asm
swapf data, W <== this line is error.
xorwf data, F
rrcf data, W <==i change only this line.
xorwf data, F
btfsc data, 2
incf data, F
movf data, W
andlw 1
movwf _return_
#endasm
}

Error show me like " Expecting an identifier "

And when i see help .
it tell me "This must be a Microchip mnemonic such as MOVLW or BTFSC."

Sorry for my english. and i don't understand well about asm.
please.

[Mark]

Not sure the reason, but it doesn't like the variable "data". If you rename it to something else, it will compile.