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