gnupic: sdcc bug
Subject:
sdcc bug
From:
"Ricardo Amezquita Orozco" ####@####.####
Date:
14 Oct 2002 16:59:49 -0000
Message-Id: <ILINENHPILOCIAAA@mailcity.com>
Hello
I wrote a small program, to test some things in the pic port of the sdcc compiler, and I think I found a bug.
The C source is the folowing
#include "p16f877.h"
#define __16F877
BIT_AT (PORTA_ADDR,0) PA;
BIT_AT (PORTB_ADDR,0) PB;
int main()
{
int i;
int j;
TRISB=255;
ADCON1=0x06;
TRISA=0x00;
while(1)
{
if(PB==0)PA=1;
else PA=0;
}
}
the generated asm is the following
.......
;; Starting pCode block
_main ;Function start
; 2 exit points
;#CSRC test.c 11
; TRISB=255;
MOVLW 0xff
BSF _STATUS,5 # change to bank 1
MOVWF _TRISB
;#CSRC test.c 12
; ADCON1=0x06;
MOVLW 0x06
MOVWF _ADCON1
;#CSRC test.c 13
; TRISA=0x00;
CLRF _TRISA
_00109_DS_
;#CSRC test.c 14
; while(1)
BTFSC (_PB >> 3), (_PB & 7) # still in bank 1 but pb is in bank 0
GOTO _00106_DS_
BCF _STATUS,5
;#CSRC test.c 16
; if(PB==0)PA=1;
BSF (_PA >> 3), (_PA & 7)
GOTO _00109_DS_
_00106_DS_
;#CSRC test.c 17
; else PA=0;
BCF (_PA >> 3), (_PA & 7)
GOTO _00109_DS_
RETURN
; exit point of _main
end
The asm file is triying to check if PB==0 in the wrong bank
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