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3402aac7 | 1 | //------------------------------------------------------------------------------\r |
1e57a462 | 2 | //\r |
3 | // Copyright (c) 2011, ARM Limited. All rights reserved.\r | |
4 | //\r | |
5 | // This program and the accompanying materials\r | |
6 | // are licensed and made available under the terms and conditions of the BSD License\r | |
7 | // which accompanies this distribution. The full text of the license may be found at\r | |
8 | // http://opensource.org/licenses/bsd-license.php\r | |
9 | //\r | |
10 | // THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | // WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | //\r | |
13 | //------------------------------------------------------------------------------\r | |
14 | \r | |
15 | \r | |
16 | EXPORT __aeabi_memmove\r | |
17 | \r | |
18 | AREA Memmove, CODE, READONLY\r | |
19 | \r | |
20 | ;\r | |
21 | ;VOID\r | |
22 | ;EFIAPI\r | |
23 | ;__aeabi_memmove (\r | |
24 | ; IN VOID *Destination,\r | |
25 | ; IN CONST VOID *Source,\r | |
26 | ; IN UINT32 Size\r | |
27 | ; );\r | |
28 | ;\r | |
29 | __aeabi_memmove\r | |
30 | CMP r2, #0\r | |
31 | BXEQ r14\r | |
32 | CMP r0, r1\r | |
33 | BXEQ r14\r | |
34 | BHI memmove_backward\r | |
35 | BLS memmove_forward\r | |
36 | \r | |
37 | memmove_forward\r | |
38 | LDRB r3, [r1], #1\r | |
39 | STRB r3, [r0], #1\r | |
40 | SUBS r2, r2, #1\r | |
41 | BXEQ r14\r | |
42 | B memmove_forward\r | |
43 | \r | |
44 | memmove_backward\r | |
45 | add r0, r2\r | |
46 | add r1, r2\r | |
47 | memmove_backward_loop\r | |
48 | LDRB r3, [r1], #-1\r | |
49 | STRB r3, [r0], #-1\r | |
50 | SUBS r2, r2, #-1\r | |
51 | BXEQ r14\r | |
52 | B memmove_backward_loop\r | |
53 | \r | |
54 | END\r |