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1 | #------------------------------------------------------------------------------ \r | |
2 | #\r | |
3 | # SemMem() worker for ARM\r | |
4 | #\r | |
5 | # This file started out as C code that did 64 bit moves if the buffer was\r | |
6 | # 32-bit aligned, else it does a byte copy. It also does a byte copy for\r | |
7 | # any trailing bytes. Update to use VSTM/VLDM to do 128 byte writes.\r | |
8 | #\r | |
9 | # Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>\r | |
10 | # This program and the accompanying materials\r | |
11 | # are licensed and made available under the terms and conditions of the BSD License\r | |
12 | # which accompanies this distribution. The full text of the license may be found at\r | |
13 | # http://opensource.org/licenses/bsd-license.php\r | |
14 | #\r | |
15 | # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
16 | # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
17 | #\r | |
18 | #------------------------------------------------------------------------------\r | |
19 | \r | |
20 | /**\r | |
21 | Set Buffer to Value for Size bytes.\r | |
22 | \r | |
23 | @param Buffer Memory to set.\r | |
24 | @param Length Number of bytes to set\r | |
25 | @param Value Value of the set operation.\r | |
26 | \r | |
27 | @return Buffer\r | |
28 | \r | |
29 | VOID *\r | |
30 | EFIAPI\r | |
31 | InternalMemSetMem (\r | |
32 | OUT VOID *Buffer,\r | |
33 | IN UINTN Length,\r | |
34 | IN UINT8 Value\r | |
35 | )\r | |
36 | **/\r | |
37 | \r | |
38 | .text\r | |
39 | .align 2\r | |
40 | GCC_ASM_EXPORT(InternalMemSetMem)\r | |
41 | \r | |
42 | ASM_PFX(InternalMemSetMem):\r | |
43 | stmfd sp!, {r4-r7, lr}\r | |
44 | tst r0, #3\r | |
45 | movne r3, #0\r | |
46 | moveq r3, #1\r | |
47 | cmp r1, #127\r | |
48 | movls lr, #0\r | |
49 | andhi lr, r3, #1\r | |
50 | cmp lr, #0\r | |
51 | mov r12, r0\r | |
52 | bne L31\r | |
53 | L32:\r | |
54 | mov r3, #0\r | |
55 | b L43\r | |
56 | L31:\r | |
57 | vdup.8 q0,r2\r | |
58 | vmov q1,q0\r | |
59 | vmov q2,q0\r | |
60 | vmov q3,q0\r | |
61 | vmov q4,q0\r | |
62 | vmov q5,q0\r | |
63 | vmov q6,q0\r | |
64 | vmov q7,q0\r | |
65 | b L32\r | |
66 | L34:\r | |
67 | cmp lr, #0\r | |
68 | streqb r2, [r12], #1\r | |
69 | subeq r1, r1, #1\r | |
70 | beq L43\r | |
71 | sub r1, r1, #128\r | |
72 | cmp r1, #127\r | |
73 | cmp r1, #31\r | |
74 | movls lr, r3\r | |
75 | vstm r12!, {d0-d15}\r | |
76 | L43:\r | |
77 | cmp r1, #0\r | |
78 | bne L34\r | |
79 | ldmfd sp!, {pc}\r | |
80 |