audk/ArmPkg/Library/CompilerIntrinsicsLib/Arm/uread.asm

39 lines
1.0 KiB
NASM

//------------------------------------------------------------------------------
//
// Copyright (c) 2008-2009 Apple Inc. All rights reserved.
//
// All rights reserved. This program and the accompanying materials
// are licensed and made available under the terms and conditions of the BSD License
// which accompanies this distribution. The full text of the license may be found at
// http://opensource.org/licenses/bsd-license.php
//
// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
//
//------------------------------------------------------------------------------
EXPORT __aeabi_uread4
AREA Uread4, CODE, READONLY
;
;UINT32
;EFIAPI
;__aeabi_uread4 (
; IN VOID *Pointer
; );
;
__aeabi_uread4
ldrb r2, [r0, #1]
ldrb r1, [r0]
ldrb r3, [r0, #2]
ldrb r0, [r0, #3]
orr r1, r1, r2, lsl #8
orr r1, r1, r3, lsl #16
orr r0, r1, r0, lsl #24
bx lr
END