1 //*****************************************************************************
2 //
3 // fpu.h - Prototypes for the floatint point manipulation routines.
4 //
5 // Copyright (c) 2011-2012 Texas Instruments Incorporated.  All rights reserved.
6 // Software License Agreement
7 //
8 //   Redistribution and use in source and binary forms, with or without
9 //   modification, are permitted provided that the following conditions
10 //   are met:
11 //
12 //   Redistributions of source code must retain the above copyright
13 //   notice, this list of conditions and the following disclaimer.
14 //
15 //   Redistributions in binary form must reproduce the above copyright
16 //   notice, this list of conditions and the following disclaimer in the
17 //   documentation and/or other materials provided with the
18 //   distribution.
19 //
20 //   Neither the name of Texas Instruments Incorporated nor the names of
21 //   its contributors may be used to endorse or promote products derived
22 //   from this software without specific prior written permission.
23 //
24 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
25 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
26 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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30 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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34 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 //
36 // This is part of revision 9453 of the Stellaris Peripheral Driver Library.
37 //
38 //*****************************************************************************
39 
40 #ifndef __FPU_H__
41 #define __FPU_H__
42 
43 //*****************************************************************************
44 //
45 // If building with a C++ compiler, make all of the definitions in this header
46 // have a C binding.
47 //
48 //*****************************************************************************
49 #ifdef __cplusplus
50 extern "C"
51 {
52 #endif
53 
54 //*****************************************************************************
55 //
56 // Values that can be passed to FPUHalfPrecisionSet as the ulMode parameter.
57 //
58 //*****************************************************************************
59 #define FPU_HALF_IEEE           0x00000000
60 #define FPU_HALF_ALTERNATE      0x04000000
61 
62 //*****************************************************************************
63 //
64 // Values that can be passed to FPUNaNModeSet as the ulMode parameter.
65 //
66 //*****************************************************************************
67 #define FPU_NAN_PROPAGATE       0x00000000
68 #define FPU_NAN_DEFAULT         0x02000000
69 
70 //*****************************************************************************
71 //
72 // Values that can be passed to FPUFlushToZeroModeSet as the ulMode parameter.
73 //
74 //*****************************************************************************
75 #define FPU_FLUSH_TO_ZERO_DIS   0x00000000
76 #define FPU_FLUSH_TO_ZERO_EN    0x01000000
77 
78 //*****************************************************************************
79 //
80 // Values that can be passed to FPURoundingModeSet as the ulMode parameter.
81 //
82 //*****************************************************************************
83 #define FPU_ROUND_NEAREST       0x00000000
84 #define FPU_ROUND_POS_INF       0x00400000
85 #define FPU_ROUND_NEG_INF       0x00800000
86 #define FPU_ROUND_ZERO          0x00c00000
87 
88 //*****************************************************************************
89 //
90 // Prototypes.
91 //
92 //*****************************************************************************
93 extern void FPUEnable(void);
94 extern void FPUDisable(void);
95 extern void FPUStackingEnable(void);
96 extern void FPULazyStackingEnable(void);
97 extern void FPUStackingDisable(void);
98 extern void FPUHalfPrecisionModeSet(unsigned long ulMode);
99 extern void FPUNaNModeSet(unsigned long ulMode);
100 extern void FPUFlushToZeroModeSet(unsigned long ulMode);
101 extern void FPURoundingModeSet(unsigned long ulMode);
102 
103 //*****************************************************************************
104 //
105 // Mark the end of the C bindings section for C++ compilers.
106 //
107 //*****************************************************************************
108 #ifdef __cplusplus
109 }
110 #endif
111 
112 #endif // __FPU_H__
113