blob: 5402fc46d169680b96915c2c811fc62a5a4fa9c7 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
|
#include "setarch.h"
#include "defines.h"
; dst A0
; src A1
; len A2
.global ___reg_memcpy
___reg_memcpy:
MOVP A0P,A3P ; keep copy of result
ADDP A2P,A0P ; point to end of dst
ADDP A2P,A1P ; point to end of src
CMPP A0P,A3P ; see if anything to do
beq quit
loop:
#ifdef __NORMAL_MODE__
sub #1,A1P ; point to byte
#else
subs #1,A1P ; point to byte
#endif
mov.b @A1P,A2L ; get byte
mov.b A2L,@-A0P ; save byte
CMPP A0P,A3P ; at the front again ?
bne loop
; return with A0 pointing to dst
quit: rts
|
