sysdeps/m68k/fpu/k_sin.c

   1 /* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #define __LIBC_INTERNAL_MATH_INLINES
  20 #include <math.h>
  21 #include "math_private.h"
  22
  23 #ifndef FUNC
  24 #define FUNC sin
  25 #endif
  26 #ifndef float_type
  27 #define float_type double
  28 #endif
  29
  30 #define __CONCATX(a,b) __CONCAT(a,b)
  31
  32 float_type
  33 __CONCATX(__kernel_,FUNC) (x, y, iy)
  34      float_type x;
  35      float_type y;
  36      int iy;
  37 {
  38   float_type sin_x, cos_x, sin_y, cos_y;
  39   if (iy == 0)
  40     return __m81_u(__CONCATX(__,FUNC)) (x);
  41   __asm__ __volatile__ ("fsincosx %2,%0:%1" : "=f" (cos_x), "=f" (sin_x)
  42                         : "f" (x));
  43   __asm__ __volatile__ ("fsincosx %2,%0:%1" : "=f" (cos_y), "=f" (sin_y)
  44                         : "f" (y));
  45   return sin_x * cos_y + cos_x * sin_y;
  46 }