newlib/libm/machine/riscv/s_fpclassify.c

   1 /*
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 2020 Kito Cheng
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above
  14  *    copyright notice, this list of conditions and the following
  15  *    disclaimer in the documentation and/or other materials provided
  16  *    with the distribution.
  17  *
  18  * 3. Neither the name of the copyright holder nor the names of its
  19  *    contributors may be used to endorse or promote products derived
  20  *    from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  24  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  25  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  26  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  27  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  28  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  29  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  31  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  32  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  33  * OF THE POSSIBILITY OF SUCH DAMAGE.
  34  */
  35 #include <math.h>
  36 #include "riscv_math.h"
  37
  38 #if defined(__RISCV_HARD_FLOAT) && __RISCV_HARD_FLOAT >= 64
  39
  40 int
  41 __fpclassifyd (double x)
  42 {
  43   long fclass = _fclass_d (x);
  44
  45   if (fclass & FCLASS_ZERO)
  46     return FP_ZERO;
  47   else if (fclass & FCLASS_NORMAL)
  48     return FP_NORMAL;
  49   else if (fclass & FCLASS_SUBNORMAL)
  50     return FP_SUBNORMAL;
  51   else if (fclass & FCLASS_INF)
  52     return FP_INFINITE;
  53   else
  54     return FP_NAN;
  55 }
  56
  57 #else
  58 #include "../../common/s_fpclassify.c"
  59 #endif