From 6e7a315eb67cb6c113cf37e1d66c4f11a51a2b3e Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 18:29:51 +0200 Subject: Adding upstream version 2.06. Signed-off-by: Daniel Baumann --- include/grub/trig.h | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 include/grub/trig.h (limited to 'include/grub/trig.h') diff --git a/include/grub/trig.h b/include/grub/trig.h new file mode 100644 index 0000000..f19617c --- /dev/null +++ b/include/grub/trig.h @@ -0,0 +1,44 @@ +/* trig.h - Trigonometric function support. */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2008 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see . + */ + +#ifndef GRUB_TRIG_HEADER +#define GRUB_TRIG_HEADER 1 + +#define GRUB_TRIG_ANGLE_MAX 256 +#define GRUB_TRIG_ANGLE_MASK 255 +#define GRUB_TRIG_FRACTION_SCALE 16384 + +extern const short grub_trig_sintab[]; +extern const short grub_trig_costab[]; + +static __inline int +grub_sin (int x) +{ + x &= GRUB_TRIG_ANGLE_MASK; + return grub_trig_sintab[x]; +} + +static __inline int +grub_cos (int x) +{ + x &= GRUB_TRIG_ANGLE_MASK; + return grub_trig_costab[x]; +} + +#endif /* ! GRUB_TRIG_HEADER */ -- cgit v1.2.3