mirror of https://github.com/acidanthera/audk.git
80 lines
2.0 KiB
NASM
Executable File
80 lines
2.0 KiB
NASM
Executable File
;------------------------------------------------------------------------------
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;
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; SetMem() worker for ARM
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;
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; This file started out as C code that did 64 bit moves if the buffer was
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; 32-bit aligned, else it does a byte copy. It also does a byte copy for
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; any trailing bytes. Update to use VSTM/VLDM to do 128 byte writes.
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;
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; Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
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; This program and the accompanying materials
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; are licensed and made available under the terms and conditions of the BSD License
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; which accompanies this distribution. The full text of the license may be found at
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; http://opensource.org/licenses/bsd-license.php
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;
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; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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;
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/**
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Set Buffer to Value for Size bytes.
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@param Buffer Memory to set.
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@param Length Number of bytes to set
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@param Value Value of the set operation.
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@return Buffer
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VOID *
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EFIAPI
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InternalMemSetMem (
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OUT VOID *Buffer,
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IN UINTN Length,
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IN UINT8 Value
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)
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**/
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\s\s
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\s\sEXPORT InternalMemSetMem
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\s\s
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\s\sAREA AsmMemStuff, CODE, READONLY
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InternalMemSetMem
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\s\sstmfd\s\ssp!, {lr}
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\s\stst\s\s r0, #3
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\s\smovne\s\sr3, #0
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\s\smoveq\s\sr3, #1
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\s\scmp\s\s r1, #127
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\s\smovls lr, #0
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\s\sandhi\s\slr, r3, #1
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\s\scmp\s\s lr, #0
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\s\smov\s\s r12, r0
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\s\sbne\s\s L31
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L32
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\s\smov\s\s r3, #0
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\s\sb\s\s L43
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L31
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vdup.8 q0,r2
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vmov q1,q0
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vmov q2,q0
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vmov q3,q0
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vmov q4,q0
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vmov q5,q0
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vmov q6,q0
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vmov q7,q0
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\s\sb\s\s L32
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L34
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\s\scmp\s\s lr, #0
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\s\sstreqb\s\sr2, [r12], #1
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\s\ssubeq\s\s r1, r1, #1
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\s\sbeq\s\s L43
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\s\ssub\s\s r1, r1, #128
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\s\scmp\s\s r1, #127
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\s\smovls\s\s lr, r3
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\s\svstm r12!, {d0-d15}
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L43
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\s\scmp\s\s r1, #0
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\s\sbne\s\s L34
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\s\sldmfd\s\s sp!, {pc}
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\s\s
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END
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