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