mirror of https://github.com/acidanthera/audk.git
55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
/** @file
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Macros to work around lack of Apple support for LDR register, =expr
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Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
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Copyright (c) 2011-2012, ARM Ltd. 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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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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#ifndef __MACRO_IO_LIB_H__
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#define __MACRO_IO_LIB_H__
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#if defined(__APPLE__)
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//
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// ldr reg, =expr does not work with current Apple tool chain. So do the work our selves
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//
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// load _Reg with _Data
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#define LoadConstantToReg(_Data, _Reg) \
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ldr _Reg, [pc, #0] ; \
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b 1f ; \
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.long (_Data) ; \
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1:
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#elif defined (__GNUC__)
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#define LoadConstantToReg(Data, Reg) \
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ldr Reg, =Data
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#else
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//
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// Use ARM assembly macros, form armasam
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//
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// Less magic in the macros if ldr reg, =expr works
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//
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// load _Reg with _Data
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#define LoadConstantToReg(Data, Reg) LoadConstantToRegMacro Data, Reg
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#endif
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#endif
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