newlib/libc/machine/spu/sys/fenv.h

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