[sdcc-devel] [ sdcc-Bugs-1185672 ] Hi-Lo byte change in IF

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Bugs item #1185672, was opened at 2005-04-19 08:21
Message generated for change (Comment added) made by maartenbrock
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=100599&aid=1185672&group_id=599

Category: msc51(8051) target
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Erno (epapa)
>Assigned to: Maarten Brock (maartenbrock)
Summary: Hi-Lo byte change in IF 

Initial Comment:
#include    <at89x52.h>

#define DEF_H0100   	0x0100

data int srlen;
int l_regrd(int ad){
	/*
	...
	*/
	return ad;
}

void head_send(int i){
	srlen= i;
	if((l_regrd(0x1234) & DEF_H0100) == 0){
		srlen= 0;
	}
}

void main(void){
	head_send(1);
}

/* The resoult:

; File Created by SDCC : FreeWare ANSI-C Compiler
; Version 2.4.0 Tue Apr 19 07:52:01 2005
......
;sdccbug.c:17: if((l_regrd(BUSSTA_REG) & RDY_TX_F) == 0){
;     genCall
;       Peephole 182.b  used 16 bit load of dptr
	mov     dptr,#0x0138
	lcall	_l_regrd
	mov	a,dpl
	mov	b,dph
;     genAnd
	mov	r2,#0x00
	anl	a,#0x01                <<<<<<Here that is no
resoult Hi byte
	mov	r3,a
.......

*/


----------------------------------------------------------------------

>Comment By: Maarten Brock (maartenbrock)
Date: 2005-04-20 10:00

Message:
Logged In: YES 
user_id=888171

Thanks,

This bug has probably been around since the beginning of 
time! Surprising it never came up before. But I think I will wait 
with the fix until SDCC 2.5.0 is out.

Maarten

----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=100599&aid=1185672&group_id=599