Assembly Jump conditionals -- jae vs. jbe

Posted by Raven Dreamer on Stack Overflow See other posts from Stack Overflow or by Raven Dreamer
Published on 2010-06-17T02:25:49Z Indexed on 2010/06/17 2:32 UTC
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Hi, all!

I'm working on an assembly program (intel 8086). I'm trying to determine whether an input character (stored in dl) is within a certain range of hex values.

     cmp       dl, 2Eh             ;checks for periods
     je        print               ;jumps to print a "." input
     cmp       dl, 7Ah             ;checks for outside of wanted range
     jae       input               ; returns to top

Please confirm that this is a correct interpretation of my code:

step 1: if dl = 2E, goto print Step 2: if dl >= 7A is false, goto input [if dl < 7A, goto input]

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