2013-01-08 22:40:58 +08:00
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//*****************************************************************************
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//
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// fpu.h - Prototypes for the floatint point manipulation routines.
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//
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// Copyright (c) 2011 Texas Instruments Incorporated. All rights reserved.
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// Software License Agreement
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//
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// Texas Instruments (TI) is supplying this software for use solely and
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// exclusively on TI's microcontroller products. The software is owned by
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// TI and/or its suppliers, and is protected under applicable copyright
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// laws. You may not combine this software with "viral" open-source
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// software in order to form a larger program.
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//
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// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
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// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
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// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
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// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
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// DAMAGES, FOR ANY REASON WHATSOEVER.
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//
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// This is part of revision 8264 of the Stellaris Peripheral Driver Library.
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//
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//*****************************************************************************
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#ifndef __FPU_H__
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#define __FPU_H__
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//*****************************************************************************
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//
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// If building with a C++ compiler, make all of the definitions in this header
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// have a C binding.
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//
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//*****************************************************************************
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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//*****************************************************************************
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//
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// Values that can be passed to FPUHalfPrecisionSet as the ulMode parameter.
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//
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//*****************************************************************************
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#define FPU_HALF_IEEE 0x00000000
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#define FPU_HALF_ALTERNATE 0x04000000
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//*****************************************************************************
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//
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// Values that can be passed to FPUNaNModeSet as the ulMode parameter.
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//
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//*****************************************************************************
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#define FPU_NAN_PROPAGATE 0x00000000
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#define FPU_NAN_DEFAULT 0x02000000
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//*****************************************************************************
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//
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// Values that can be passed to FPUFlushToZeroModeSet as the ulMode parameter.
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//
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//*****************************************************************************
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#define FPU_FLUSH_TO_ZERO_DIS 0x00000000
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#define FPU_FLUSH_TO_ZERO_EN 0x01000000
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//*****************************************************************************
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//
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// Values that can be passed to FPURoundingModeSet as the ulMode parameter.
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//
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//*****************************************************************************
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#define FPU_ROUND_NEAREST 0x00000000
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#define FPU_ROUND_POS_INF 0x00400000
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#define FPU_ROUND_NEG_INF 0x00800000
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#define FPU_ROUND_ZERO 0x00c00000
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//*****************************************************************************
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//
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// Prototypes.
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//
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//*****************************************************************************
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extern void FPUEnable(void);
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extern void FPUDisable(void);
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extern void FPUStackingEnable(void);
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extern void FPULazyStackingEnable(void);
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extern void FPUStackingDisable(void);
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extern void FPUHalfPrecisionModeSet(unsigned long ulMode);
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extern void FPUNaNModeSet(unsigned long ulMode);
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extern void FPUFlushToZeroModeSet(unsigned long ulMode);
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extern void FPURoundingModeSet(unsigned long ulMode);
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//*****************************************************************************
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//
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// Mark the end of the C bindings section for C++ compilers.
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//
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//*****************************************************************************
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#ifdef __cplusplus
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}
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#endif
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#endif // __FPU_H__
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