| .file "memmove.S" | |
| .section .text | |
| .global _memmove | |
| .type _memmove,@function | |
| _memmove: | |
| mov r1, r4 ; Save a copy of DEST | |
| cmp r1, r2 | |
| blt 2f ; If SRC (r2) is less than DEST (r1) then copy backwards | |
| smovf | |
| 1: | |
| mov r4, r1 ; Return DEST | |
| rts | |
| 2: | |
| add r3, r1 ; The SMOVB instructions requires the DEST in r1 and the | |
| add r3, r2 ; SRC in r2 but it needs them to point the last bytes of | |
| sub #1, r2 ; the regions involved not the first bytes, hence these | |
| sub #1, r1 ; additions and subtractions. | |
| smovb | |
| bra 1b |