[444] | 1 | /* |
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| 2 | (C) Copyright 2006, 2007 |
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| 3 | International Business Machines Corporation, |
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| 4 | Sony Computer Entertainment, Incorporated, |
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| 5 | Toshiba Corporation, |
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| 6 | |
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| 7 | All rights reserved. |
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| 8 | |
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| 9 | Redistribution and use in source and binary forms, with or without |
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| 10 | modification, are permitted provided that the following conditions are met: |
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| 11 | |
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| 12 | * Redistributions of source code must retain the above copyright notice, |
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| 13 | this list of conditions and the following disclaimer. |
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| 14 | * Redistributions in binary form must reproduce the above copyright |
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| 15 | notice, this list of conditions and the following disclaimer in the |
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| 16 | documentation and/or other materials provided with the distribution. |
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| 17 | * Neither the names of the copyright holders nor the names of their |
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| 18 | contributors may be used to endorse or promote products derived from this |
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| 19 | software without specific prior written permission. |
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| 20 | |
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| 21 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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| 22 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 23 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 24 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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| 25 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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| 26 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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| 27 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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| 28 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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| 29 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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| 30 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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| 31 | POSSIBILITY OF SUCH DAMAGE. |
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| 32 | */ |
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| 33 | #ifndef _SYS_FENV_H |
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| 34 | #define _SYS_FENV_H |
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| 35 | |
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| 36 | /* |
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| 37 | * The exception macros are such that the functions to pack/unpack them |
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| 38 | * will map a 32 bit fenv_t from/to the 128 bit fpscr. |
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| 39 | * |
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| 40 | * Suffixes: |
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| 41 | * _SNGL: single precision |
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| 42 | * _DBL: double precision |
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| 43 | * _N: element number, no suffix for element 0. |
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| 44 | */ |
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| 45 | |
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| 46 | #define FE_OVERFLOW_SNGL 0x08000000 |
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| 47 | #define FE_UNDERFLOW_SNGL 0x04000000 |
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| 48 | #define FE_DIFF_SNGL 0x02000000 |
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| 49 | #define FE_DIVBYZERO_SNGL 0x00000040 |
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| 50 | |
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| 51 | #define FE_OVERFLOW_SNGL_1 0x00040000 |
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| 52 | #define FE_UNDERFLOW_SNGL_1 0x00020000 |
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| 53 | #define FE_DIFF_SNGL_1 0x00010000 |
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| 54 | #define FE_DIVBYZERO_SNGL_1 0x00000020 |
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| 55 | |
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| 56 | #define FE_OVERFLOW_SNGL_2 0x00000200 |
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| 57 | #define FE_UNDERFLOW_SNGL_2 0x00000100 |
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| 58 | #define FE_DIFF_SNGL_2 0x00000080 |
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| 59 | #define FE_DIVBYZERO_SNGL_2 0x00000010 |
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| 60 | |
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| 61 | #define FE_OVERFLOW_SNGL_3 0x00000004 |
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| 62 | #define FE_UNDERFLOW_SNGL_3 0x00000002 |
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| 63 | #define FE_DIFF_SNGL_3 0x00000001 |
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| 64 | #define FE_DIVBYZERO_SNGL_3 0x00000008 |
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| 65 | |
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| 66 | #define FE_ALL_EXCEPT_SNGL (FE_OVERFLOW_SNGL | FE_UNDERFLOW_SNGL \ |
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| 67 | | FE_DIFF_SNGL | FE_DIVBYZERO_SNGL) |
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| 68 | #define FE_ALL_EXCEPT_SNGL_1 (FE_OVERFLOW_SNGL_1 | FE_UNDERFLOW_SNGL_1 \ |
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| 69 | | FE_DIFF_SNGL_1 | FE_DIVBYZERO_SNGL_1) |
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| 70 | #define FE_ALL_EXCEPT_SNGL_2 (FE_OVERFLOW_SNGL_2 | FE_UNDERFLOW_SNGL_2 \ |
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| 71 | | FE_DIFF_SNGL_2 | FE_DIVBYZERO_SNGL_2) |
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| 72 | #define FE_ALL_EXCEPT_SNGL_3 (FE_OVERFLOW_SNGL_3 | FE_UNDERFLOW_SNGL_3 \ |
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| 73 | | FE_DIFF_SNGL_3 | FE_DIVBYZERO_SNGL_3) |
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| 74 | |
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| 75 | #define FE_OVERFLOW_DBL 0x01000000 |
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| 76 | #define FE_UNDERFLOW_DBL 0x00800000 |
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| 77 | #define FE_INEXACT_DBL 0x00400000 |
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| 78 | #define FE_INVALID_DBL 0x00200000 |
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| 79 | #define FE_NC_NAN_DBL 0x00100000 |
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| 80 | #define FE_NC_DENORM_DBL 0x00080000 |
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| 81 | |
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| 82 | #define FE_OVERFLOW_DBL_1 0x00008000 |
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| 83 | #define FE_UNDERFLOW_DBL_1 0x00004000 |
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| 84 | #define FE_INEXACT_DBL_1 0x00002000 |
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| 85 | #define FE_INVALID_DBL_1 0x00001000 |
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| 86 | #define FE_NC_NAN_DBL_1 0x00000800 |
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| 87 | #define FE_NC_DENORM_DBL_1 0x00000400 |
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| 88 | |
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| 89 | #define FE_ALL_EXCEPT_DBL (FE_OVERFLOW_DBL | FE_UNDERFLOW_DBL | \ |
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| 90 | FE_INEXACT_DBL | FE_INVALID_DBL | \ |
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| 91 | FE_NC_NAN_DBL | FE_NC_DENORM_DBL) |
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| 92 | #define FE_ALL_EXCEPT_DBL_1 (FE_OVERFLOW_DBL_1 | FE_UNDERFLOW_DBL_1 | \ |
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| 93 | FE_INEXACT_DBL_1 | FE_INVALID_DBL_1 | \ |
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| 94 | FE_NC_NAN_DBL_1 | FE_NC_DENORM_DBL_1) |
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| 95 | |
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| 96 | #define FE_ALL_EXCEPT (FE_ALL_EXCEPT_SNGL | FE_ALL_EXCEPT_SNGL_1 | \ |
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| 97 | FE_ALL_EXCEPT_SNGL_2 | FE_ALL_EXCEPT_SNGL_3 | \ |
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| 98 | FE_ALL_EXCEPT_DBL | FE_ALL_EXCEPT_DBL_1) |
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| 99 | |
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| 100 | /* |
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| 101 | * Warning: some of these are single and some double precision only, |
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| 102 | * because of the hardware implementation. |
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| 103 | */ |
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| 104 | #define FE_DIVBYZERO (FE_DIVBYZERO_SNGL | FE_DIVBYZERO_SNGL_1 | \ |
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| 105 | FE_DIVBYZERO_SNGL_2 | FE_DIVBYZERO_SNGL_3) |
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| 106 | #define FE_INEXACT (FE_INEXACT_DBL | FE_INEXACT_DBL_1) |
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| 107 | #define FE_INVALID (FE_INVALID_DBL | FE_INVALID_DBL_1) |
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| 108 | #define FE_NC_NAN (FE_NC_NAN_DBL | FE_NC_NAN_DBL_1) |
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| 109 | #define FE_NC_DENORM (FE_NC_DENORM_DBL | FE_NC_DENORM_DBL_1) |
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| 110 | |
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| 111 | /* |
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| 112 | * __FE_ROUND_ELE_n values are set so that they can easily be used as a |
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| 113 | * mask when setting the fpscr. These tell us whether we are setting the |
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| 114 | * round mode for a specific element (double precision floating point |
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| 115 | * only, so there are only two elements). |
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| 116 | */ |
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| 117 | #define __FE_ROUND_ELE_0 0xc00 |
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| 118 | #define __FE_ROUND_ELE_1 0x300 |
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| 119 | |
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| 120 | /* |
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| 121 | * The following map directly to round values in the fpscr. |
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| 122 | */ |
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| 123 | #define __FE_SPU_TONEAREST 0 |
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| 124 | #define __FE_SPU_TOWARDZERO 1 |
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| 125 | #define __FE_SPU_UPWARD 2 |
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| 126 | #define __FE_SPU_DOWNWARD 3 |
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| 127 | |
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| 128 | #define FE_TONEAREST (__FE_ROUND_ELE_0 | (__FE_SPU_TONEAREST << 2)) |
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| 129 | #define FE_TOWARDZERO (__FE_ROUND_ELE_0 | (__FE_SPU_TOWARDZERO << 2)) |
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| 130 | #define FE_UPWARD (__FE_ROUND_ELE_0 | (__FE_SPU_UPWARD << 2)) |
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| 131 | #define FE_DOWNWARD (__FE_ROUND_ELE_0 | (__FE_SPU_DOWNWARD << 2)) |
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| 132 | |
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| 133 | #define FE_TONEAREST_1 (__FE_ROUND_ELE_1 | __FE_SPU_TONEAREST) |
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| 134 | #define FE_TOWARDZERO_1 (__FE_ROUND_ELE_1 | __FE_SPU_TOWARDZERO) |
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| 135 | #define FE_UPWARD_1 (__FE_ROUND_ELE_1 | __FE_SPU_UPWARD) |
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| 136 | #define FE_DOWNWARD_1 (__FE_ROUND_ELE_1 | __FE_SPU_DOWNWARD) |
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| 137 | |
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| 138 | typedef unsigned int fexcept_t; |
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| 139 | typedef unsigned int fenv_t; |
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| 140 | |
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| 141 | extern const fenv_t __fe_dfl_env; |
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| 142 | #define FE_DFL_ENV (&__fe_dfl_env) |
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| 143 | |
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| 144 | #endif /* fenv.h */ |
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