newlib/libm/machine/riscv/riscv_math.h

   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
  36 #ifndef __RISCV_MATH_H
  37 #define __RISCV_MATH_H
  38
  39
  40
  41 #if defined(__riscv_flen) || defined(__riscv_zfinx)
  42
  43 #if (__riscv_flen >= 64) || defined(__riscv_zdinx)
  44 #define __RISCV_HARD_FLOAT 64
  45 #else
  46 #define __RISCV_HARD_FLOAT 32
  47 #endif
  48
  49 #define FCLASS_NEG_INF       (1 << 0)
  50 #define FCLASS_NEG_NORMAL    (1 << 1)
  51 #define FCLASS_NEG_SUBNORMAL (1 << 2)
  52 #define FCLASS_NEG_ZERO      (1 << 3)
  53 #define FCLASS_POS_ZERO      (1 << 4)
  54 #define FCLASS_POS_SUBNORMAL (1 << 5)
  55 #define FCLASS_POS_NORMAL    (1 << 6)
  56 #define FCLASS_POS_INF       (1 << 7)
  57 #define FCLASS_SNAN          (1 << 8)
  58 #define FCLASS_QNAN          (1 << 9)
  59
  60
  61 #define FCLASS_INF           (FCLASS_NEG_INF | FCLASS_POS_INF)
  62 #define FCLASS_ZERO          (FCLASS_NEG_ZERO | FCLASS_POS_ZERO)
  63 #define FCLASS_NORMAL        (FCLASS_NEG_NORMAL | FCLASS_POS_NORMAL)
  64 #define FCLASS_SUBNORMAL     (FCLASS_NEG_SUBNORMAL | FCLASS_POS_SUBNORMAL)
  65 #define FCLASS_NAN           (FCLASS_SNAN | FCLASS_QNAN)
  66
  67 #if (__riscv_flen >= 64) || defined(__riscv_zdinx)
  68 static inline long _fclass_d(double x){
  69   long fclass;
  70   __asm __volatile ("fclass.d\t%0, %1" : "=r" (fclass) : "f" (x));
  71   return fclass;
  72 }
  73 #endif
  74
  75 #if (__riscv_flen >= 32) || defined(__riscv_zfinx)
  76 static inline long _fclass_f(float x){
  77   long fclass;
  78   __asm __volatile ("fclass.s\t%0, %1" : "=r" (fclass) : "f" (x));
  79   return fclass;
  80 }
  81 #endif
  82
  83 #endif /* __riscv_flen */
  84
  85
  86 #endif /* __RISCV_MATH_H */