Subject:
Re: [gnupic] SDCC 2.6.0, finds pic14 header files but not pic16
From:
"mengjin su" ####@####.####
Date:
3 Aug 2006 00:09:29 +0100
Message-Id: <BAY101-F283778998C96A16F59AE59D0520@phx.gbl>
I did a testing using SDCC (v2.5.0?). I feel the code efficiency
is not satisfying. Here is the test C code I wrote:
void strcpy (char *des, char *src)
{
while ( (*des++ = *src++) ) {}
}
The assembly code SDCC generated is
; ; Starting pCode block
S_main__strcpy code
_strcpy:
; .line 11; main.c void strcpy (char *des, char *src)
MOVFF FSR2L, POSTDEC1
MOVFF FSR1L, FSR2L
MOVFF r0x00, POSTDEC1
MOVFF r0x01, POSTDEC1
MOVFF r0x02, POSTDEC1
MOVFF r0x03, POSTDEC1
MOVFF r0x04, POSTDEC1
MOVFF r0x05, POSTDEC1
MOVFF r0x06, POSTDEC1
MOVLW 0x02
MOVFF PLUSW2, r0x00
MOVLW 0x03
MOVFF PLUSW2, r0x01
MOVLW 0x04
MOVFF PLUSW2, r0x02
MOVLW 0x05
MOVFF PLUSW2, r0x03
MOVLW 0x06
MOVFF PLUSW2, r0x04
MOVLW 0x07
MOVFF PLUSW2, r0x05
_00105_DS_:
; .line 13; main.c while ( (*des++ = *src++) ) {}
MOVFF r0x03, FSR0L
MOVFF r0x04, PRODL
MOVF r0x05, W
CALL __gptrget1
MOVWF r0x06
INCF r0x03, F
BTFSC STATUS, 0
INCF r0x04, F
BTFSC STATUS, 0
INCF r0x05, F
MOVFF r0x06, POSTDEC1
MOVFF r0x00, FSR0L
MOVFF r0x01, PRODL
MOVF r0x02, W
CALL __gptrput1
INCF r0x00, F
BTFSC STATUS, 0
INCF r0x01, F
BTFSC STATUS, 0
INCF r0x02, F
MOVF r0x06, W
BTFSS STATUS, 2
GOTO _00105_DS_
MOVFF PREINC1, r0x06
MOVFF PREINC1, r0x05
MOVFF PREINC1, r0x04
MOVFF PREINC1, r0x03
MOVFF PREINC1, r0x02
MOVFF PREINC1, r0x01
MOVFF PREINC1, r0x00
MOVFF PREINC1, FSR2L
RETURN
What do you think?
- Mengjin -
>From: Peter Chant ####@####.####
>Reply-To: ####@####.####
>To: ####@####.####
>Subject: Re: [gnupic] SDCC 2.6.0, finds pic14 header files but not pic16
>Date: Wed, 2 Aug 2006 08:27:05 +0100
>
>On Wednesday 02 August 2006 01:47, George M. Gallant, Jr. wrote:
> > Pete,
> >
> > I am unable to reproduce your problem. Perhaps it is because I have a
> > older
> > version of sdcc or because I specify the include path in the Makefile.
> >
>
>Thanks,
>
>including the path in the makefile sorted it. Strange that it was not
>needed for the header files in the pic include sub directory but was in
>the pic16 one.
>
>I've just realised that there is a sdcc-user mailing list. I suspect I'm
>better of asking questions there.
>
>Thanks.
>
>Pete
>
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