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