Hello!
When I trying to compile EasyWeb source code I found thing which
looks like a bug.
We have next constructions in the sources:
--8<-----------------------------------------------------------------
...
#define MYMAC_1 0x00 // our ethernet (MAC) address
#define MYMAC_2 0xC0 // (MUST be unique in LAN!)
#define MYMAC_3 0x26
#define MYMAC_4 0xF1
#define MYMAC_5 0x12
#define MYMAC_6 0x34
const unsigned char MyMAC[] = // "M1-M2-M3-M4-M5-M6"
{
MYMAC_1, MYMAC_2, MYMAC_3,
MYMAC_4, MYMAC_5, MYMAC_6
};
...
memcpy(&TxFrame2[ARP_SENDER_HA_OFS], &MyMAC, 6);
...
--8<-----------------------------------------------------------------
Compiled code:
--8<-----------------------------------------------------------------
...
0000116d <MyMAC>:
116d: 00 c0
116f: 26 f1
1171: 12 34
...
1c1c: 3f 40 6d 11 mov #4461, r15 ;#0x116d
1c20: b2 4f 06 02 mov @r15+, &0x0206 ;
1c24: b2 4f 08 02 mov @r15+, &0x0208 ;
1c28: b2 4f 0a 02 mov @r15+, &0x020a ;
...
--8<-----------------------------------------------------------------
It doesn't work (at least, inside my board :)! 0x116d is odd value
and word moving (@r15+) will not work correctly there, isn't it?
This looks like incorrect optimization result.
Victor ANTONOVICH mailto:[email protected]
2:5055/124...@fidonet
