6d0089049d48134dab034e51ff5f13b9362f8b5b
[mirror_edk2.git] / MdePkg / Library / BaseMemoryLibOptDxe / Arm / CompareGuid.S
1 //
2 // Copyright (c) 2016, Linaro Limited
3 // All rights reserved.
4 //
5 // Redistribution and use in source and binary forms, with or without
6 // modification, are permitted provided that the following conditions are met:
7 // * Redistributions of source code must retain the above copyright
8 // notice, this list of conditions and the following disclaimer.
9 // * Redistributions in binary form must reproduce the above copyright
10 // notice, this list of conditions and the following disclaimer in the
11 // documentation and/or other materials provided with the distribution.
12 // * Neither the name of the Linaro nor the
13 // names of its contributors may be used to endorse or promote products
14 // derived from this software without specific prior written permission.
15 //
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 // HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 //
28
29 .text
30 .thumb
31 .syntax unified
32 .align 5
33 ASM_GLOBAL ASM_PFX(InternalMemCompareGuid)
34 ASM_PFX(InternalMemCompareGuid):
35 push {r4, lr}
36 ldr r2, [r0]
37 ldr r3, [r0, #4]
38 ldr r4, [r0, #8]
39 ldr r0, [r0, #12]
40 cbz r1, 1f
41 ldr ip, [r1]
42 ldr lr, [r1, #4]
43 cmp r2, ip
44 it eq
45 cmpeq.n r3, lr
46 beq 0f
47 movs r0, #0
48 pop {r4, pc}
49
50 0: ldr r2, [r1, #8]
51 ldr r3, [r1, #12]
52 cmp r4, r2
53 it eq
54 cmpeq.n r0, r3
55 bne 2f
56 movs r0, #1
57 pop {r4, pc}
58
59 1: orrs r2, r2, r3
60 orrs r4, r4, r0
61 movs r0, #1
62 orrs r2, r2, r4
63 2: it ne
64 movne.n r0, #0
65 pop {r4, pc}