mirror of https://github.com/acidanthera/audk.git
47 lines
932 B
NASM
47 lines
932 B
NASM
//------------------------------------------------------------------------------
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//
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// Copyright (c) 2011-2014, ARM Limited. All rights reserved.
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//
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// SPDX-License-Identifier: BSD-2-Clause-Patent
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//
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//------------------------------------------------------------------------------
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INCLUDE AsmMacroExport.inc
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;
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;VOID
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;EFIAPI
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;__aeabi_memmove (
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; IN VOID *Destination,
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; IN CONST VOID *Source,
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; IN UINT32 Size
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; );
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;
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RVCT_ASM_EXPORT __aeabi_memmove
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CMP r2, #0
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BXEQ lr
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CMP r0, r1
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BXEQ lr
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BHI memmove_backward
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memmove_forward
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LDRB r3, [r1], #1
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STRB r3, [r0], #1
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SUBS r2, r2, #1
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BNE memmove_forward
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BX lr
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memmove_backward
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add r0, r2
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add r1, r2
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memmove_backward_loop
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LDRB r3, [r1, #-1]!
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STRB r3, [r0, #-1]!
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SUBS r2, r2, #1
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BNE memmove_backward_loop
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BX lr
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END
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