As Scott and others have hinted at before - you can do almost anything
on a PIC in 12 instructions - HiTech is trying hard - someday they hope
to get CLRF up to 12 instructions but for now it's only 5 :)

HiTech changed when Clyde hired a new president. That's when I stoppped
my maintenance contract with them.

Now that Microchip owns HiTech, perhaps things will change. I imagine
the Microchip forums would be a place to look, there might be chatter
about it.

Cheers,

Bob


Mike Harrison wrote:
> (posted before but forgot tag....)
> 
> WTF is going on with the Hi-Tech compiler that ships with MPLAB....
> A few samples below  (all vars are global chars)., target 16F818
> 
> Can anyone think of any explanation for such poor code generation other than deliberately making it
> slow to make their paid-for compiler look better ? 
> 
> It can't be doing Microchip any favours shipping such a poor performing compiler with MPLAB as it
> makes their chips look slow and inefficient.  
> 
> 
> 365:               irrxsum1+=irbyte1;
>    115    087A     MOVF 0x7a, W
>    116    00C3     MOVWF 0x43
>    117    0843     MOVF 0x43, W
>    118    07F4     ADDWF 0x74, F
> 
> Should be 2 instructions
> 
> 366:               ircnt1=0;
>    119    1003     BCF 0x3, 0
>    11A    3000     MOVLW 0
>    11B    1803     BTFSC 0x3, 0
>    11C    3001     MOVLW 0x1
>    11D    00FB     MOVWF 0x7b
> 
> This is especially bizarre - should be 1 CLRF instruction
> 
> 349:               irtmr1+=bittime2; // bittime2 is a constant
>    0DF    300E     MOVLW 0xe
>    0E0    00C3     MOVWF 0x43
>    0E1    0843     MOVF 0x43, W
>    0E2    07F5     ADDWF 0x75, F
> 
> Should be 2 instructions
> 
> 
> 350:               ircnt1++;
>    0E3    3001     MOVLW 0x1
>    0E4    00C3     MOVWF 0x43
>    0E5    0843     MOVF 0x43, W
>    0E6    07FB     ADDWF 0x7b, F
> 
> Should be 1 INCF instruction
> 
> 322:               irin=PORTA;
>    090    0805     MOVF 0x5, W
>    091    00C3     MOVWF 0x43
>    092    0843     MOVF 0x43, W
>    093    00FC     MOVWF 0x7c
> 
> Why is it storing in two places?
> 
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