view lib/kreiderclib/strspn.as @ 2981:9550602c9a0b

sierra/objs_lsl/mnln.asm: Use division quotient, not remainder It calls a routine twice to make a division (L125C) but doesn't check the right register for the result. The result is returned in reg U and the remainder in reg D but the procedure expect the result to be returned in reg D. The divison routine seems to be correct because it is properly used elsewhere in the code. Patch by Guillaume Major and Robert Gault.
author Guillaume Major <guillaume.major@gmail.com>
date Sat, 12 Apr 2014 15:30:03 +0200
parents 1647f1874cdf
children
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* Disassembly by Os9disasm of strspn.r

 section code

strspn: pshs  x,u 
 ldx   8,s 
 ldu   6,s 
 pshs  x 
L0008 ldb   ,u+ 
 beq   L0028 
 stb   3,s 
 lbsr  strchr 
 bne   L0008 
 bra   L0028 
strcspn: pshs  x,u 
 ldx   8,s 
 ldu   6,s 
 pshs  x 
L001d ldb   ,u+ 
 beq   L0028 
 stb   3,s 
 lbsr  strchr 
 beq   L001d 
L0028 leau  -1,u 
 tfr   u,d 
 subd  8,s 
 leas  4,s 
 puls  u,pc 

 endsect