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right_shift function

 
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helmudt



Joined: 11 Jan 2005
Posts: 1

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right_shift function
PostPosted: Tue Jan 11, 2005 4:53 am     Reply with quote
Hi guys,

How do you tell the compiler to use the “Carry” data when you use the right_shift() function. The ASM code generated when I use the right_shift command is “RRNCF”
P.s I'm using the Pic18F452

Thanks
Helmudt
Ttelmah
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Re: right_shift function
PostPosted: Tue Jan 11, 2005 7:25 am     Reply with quote
helmudt wrote:
Hi guys,

How do you tell the compiler to use the “Carry” data when you use the right_shift() function. The ASM code generated when I use the right_shift command is “RRNCF”
P.s I'm using the Pic18F452

Thanks
Helmudt

This is the difference between a 'shift', and a 'rotate'. Look at 'rotate_right', instead of 'shift_right'.

Best Wishes
densimitre



Joined: 21 Dec 2004
Posts: 45

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PostPosted: Thu Jan 13, 2005 6:05 pm     Reply with quote
rotate_left() puts carry in LSB

shift_left(a,b,c) puts c on LSB, carry it doesn't matter.

C can be 0 or 1, as you wich.


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