| #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 | |