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makefile: Allow PORTS with level1/2 mix https://sourceforge.net/p/nitros9/feature-requests/10/
author Tormod Volden <debian.tormod@gmail.com>
date Tue, 19 Apr 2022 18:12:17 +0200
parents 1647f1874cdf
children
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* Disassembly by Os9disasm of clshifts.r

 section code

_lshl: ldx   2,s 
 pshs  b 
 lbsr  _ltoacc 
 puls  b 
 tstb   
 beq   L0017 
L000c asl   3,x 
 rol   2,x 
 rol   1,x 
 rol   ,x 
 decb   
 bne   L000c 
L0017 puls  d 
 std   ,s 
 rts    
_lshr: ldx   2,s 
 pshs  b 
 lbsr  _ltoacc 
 puls  b 
 tstb   
 beq   L0033 
L0028 asr   ,x 
 ror   1,x 
 ror   2,x 
 ror   3,x 
 decb   
 bne   L0028 
L0033 puls  d 
 std   ,s 
 rts    

 endsect