[sdcc-devel] [ sdcc-Feature Requests-1677065 ] PIC14 Optimization

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Feature Requests item #1677065, was opened at 2007-03-09 10:21
Message generated for change (Settings changed) made by spth
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>Category: pic14 target
Group: None
Status: Open
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: PIC14 Optimization

Initial Comment:
Same simple code for PIC16F819 compiled with CCS and SDCC has differencies in terms of optimization, I think. 

static long routine_one (void)
{
  an_value=ADRESH;
  an_value<<=8;
  an_value|=ADRESL;
  an_value=an_value/256;
  return an_value;
}


void routine_two (void)
{
  unsigned char sens, sens1;

  sens1=sens;
  if (sens>100) sens=100;
  cen=sens/100;
  sens=sens-cen*100;
  dec=sens/10;
  un=sens-dec*10;
}


SDCC hex file "explodes".

More over, SDCC introduces a lot of BANKSEL, even if they are not necessary.

Hope this helps.

Thank you for your efforts: SDCC is very nice. Improve it.

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