58b5d037b4
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11295 6f19259b-4bc3-4df7-8a09-765794883524
82 lines
2.1 KiB
ArmAsm
Executable File
82 lines
2.1 KiB
ArmAsm
Executable File
#------------------------------------------------------------------------------
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#
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# SemMem() 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. It was updated to do 32-byte at a time.
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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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/**
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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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.text
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.align 2
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GCC_ASM_EXPORT(InternalMemSetMem)
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ASM_PFX(InternalMemSetMem):
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\s\sstmfd\s\ssp!, {r4-r11, 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, #31
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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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and r4, r2, #0xff
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orr r4, r4, r4, LSL #8
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orr r4, r4, r4, LSL #16
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\s\smov r5, r4
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\s\smov r5, r4
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\s\smov r6, r4
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\s\smov r7, r4
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\s\smov r8, r4
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\s\smov r9, r4
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\s\smov r10, r4
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\s\smov r11, r4
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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, #32
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\s\scmp\s\s r1, #31
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\s\smovls\s\s lr, r3
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\s\sstmia\s\s r12!, {r4-r11}
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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!, {r4-r11, pc}
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\s\s |