arch/all-pc/boot/grub2-aros/include/grub/trig.h

   1 /* trig.h - Trigonometric function support.  */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2008  Free Software Foundation, Inc.
   5  *
   6  *  GRUB is free software: you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation, either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  GRUB is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #ifndef GRUB_TRIG_HEADER
  21 #define GRUB_TRIG_HEADER 1
  22
  23 #define GRUB_TRIG_ANGLE_MAX 256
  24 #define GRUB_TRIG_ANGLE_MASK 255
  25 #define GRUB_TRIG_FRACTION_SCALE 16384
  26
  27 extern const short grub_trig_sintab[];
  28 extern const short grub_trig_costab[];
  29
  30 static __inline int
  31 grub_sin (int x)
  32 {
  33   x &= GRUB_TRIG_ANGLE_MASK;
  34   return grub_trig_sintab[x];
  35 }
  36
  37 static __inline int
  38 grub_cos (int x)
  39 {
  40   x &= GRUB_TRIG_ANGLE_MASK;
  41   return grub_trig_costab[x];
  42 }
  43
  44 #endif /* ! GRUB_TRIG_HEADER */