Prop assembly

Twim

·I'm having some difficulty understanding how the REV instruction works.
·What does the s-fields value actually do?
·I would like to reverse the order of all 32 bits of a value but
whenever· I use 0 as the s-field value I get erroneous results. if i use a value of 2, or 4
all but the last 2 bits are reversed as expected. I have tried several values but I cant get all 32 bits reversed
What am·I doing wrong?


·

Mike Green

What kind of erroneous results do you get? A source field value of zero should reverse all 32 bits.

Twim

Hello Mike,
thanks for your speedy reply. I think i've found the problem!
I was using rev _crdBuff,0
I tried rev _crdBuff,#0 shorty after posting and that did it . explains the erroneous results. Im guessing I was using the value at
memory address 0 not the literal 0.

Thanks.