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IS THIS A BUG? :-(

Youth Jack

Hi, all

I found there is likely a bug in keil c51's compiler(V6.0 DEMO Version)

When compile and link the following program lines:

#include <absacc.h>
#include <reg52.h>

#define ADDR201 XBYTE[0x8000]
bdata unsigned char D201;
sbit green = D201^2;
void main(void)
{
while(1)
{
green = 1;
ADDR201 = D201;
green = 0;
green = 1;
ADDR201 = D201;
}
}

the result was:

RSEG ?PR?main?TMAIN
main:
; SOURCE LINE # 8
; {
; SOURCE LINE # 9
?C0001:
; while(1)
; SOURCE LINE # 10
; {
; SOURCE LINE # 11
; green = 1;
; SOURCE LINE # 12
SETB green
; ADDR201 = D201;
; SOURCE LINE # 13
MOV DPTR,#08000H
MOV A,D201
MOVX @DPTR,A
; green = 0;
; SOURCE LINE # 14
CLR green
; green = 1;
; SOURCE LINE # 15
SETB green
; ADDR201 = D201;
; SOURCE LINE # 16
MOVX @DPTR,A
; }
; SOURCE LINE # 17
SJMP ?C0001
; END OF main
END

there was an obvious error in the assembly code for source line # 16 !
there should be another line:
MOV A,D201
before the line:
MOVX @DPTR,A

Is it a bug?

0