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https://github.com/CloverHackyColor/CloverBootloader.git
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67 lines
2.4 KiB
ArmAsm
67 lines
2.4 KiB
ArmAsm
//
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// Copyright (c) 2016, Linaro Limited
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of the Linaro nor the
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// names of its contributors may be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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.text
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.thumb
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.syntax unified
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.align 5
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.type ASM_PFX(InternalMemCompareGuid), %function
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ASM_GLOBAL ASM_PFX(InternalMemCompareGuid)
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ASM_PFX(InternalMemCompareGuid):
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push {r4, lr}
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ldr r2, [r0]
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ldr r3, [r0, #4]
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ldr r4, [r0, #8]
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ldr r0, [r0, #12]
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cbz r1, 1f
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ldr ip, [r1]
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ldr lr, [r1, #4]
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cmp r2, ip
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it eq
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cmpeq.n r3, lr
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beq 0f
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movs r0, #0
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pop {r4, pc}
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0: ldr r2, [r1, #8]
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ldr r3, [r1, #12]
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cmp r4, r2
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it eq
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cmpeq.n r0, r3
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bne 2f
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movs r0, #1
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pop {r4, pc}
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1: orrs r2, r2, r3
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orrs r4, r4, r0
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movs r0, #1
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orrs r2, r2, r4
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2: it ne
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movne.n r0, #0
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pop {r4, pc}
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