Bitwise functions for 27S?

06022017, 04:18 PM
Post: #1




Bitwise functions for 27S?
Just curious if anybody's tackled these before (only the basics: AND, OR, XOR, and NOT). I could probably come up with something without too much fuss, but no sense reinventing the wheel.


06052017, 07:37 PM
Post: #2




RE: Bitwise functions for 27S?
Alright, here's my attempt at it, then. Not the fastest thing in the world, but it gets the job done in a pinch. Note that it expects (and returns) decimal values. If you want to use nondecimal numbers, enter/convert them in the BASE menu and store into scratch registers for recalling in the solver.
Enter your operands into A and B, and solve for the operation you want. #NOT works a little differently  it inverts the bits in A, and uses the value in B as the word size, i.e. the result will be padded/trimmed to B bits, as appropriate. This isn't designed to handle any goofy inputs (nonintegers or negative values). And if you give it a huge value for B when calculating #NOT, be prepared to wait. I've added some line feeds and indentation for readability. Code: BITS: I think this would work on the 17BII, 19BII, and palmtops (I developed it on my 200LX). If any of those models doesn't have the IDIV function, just substitute IP(X÷Y) as appropriate. Comments or improvements welcome. 

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