Mercurial > hg > Members > kono > nitros9-code

view lib/alib/is_digit.a @ 2664:09feb97c181f lwtools-port

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Initial changes to use lwasm instead of mamou Initial high level changes to use lwasm instead of mamou.
author William Astle <lost@l-w.ca>
date Sun, 10 Jun 2012 12:40:11 -0600
parents 7d70b7e1cb21
children aaba193af04f
line wrap: on
line source

*****************************************

* See if character in "B" is a digit 0..9

* OTHER MODULES NEEDED: none

* ENTRY: B=character to test

* EXIT: CC zero=1 if digit, 0 if not

 nam Is Char a Digit?
 ttl Assembler Library Module


 psect IS_DIGIT,0,0,0,0,0


IS_DIGIT:
 cmpb #'0 
 blo no not digit, zero cleared
 cmpb #'9 if equal, zero set
 bhi no not digit, zero cleared
 orcc #%00000100 set zero

no
 rts

 endsect