glibc/sysdeps/m68k/fpu/k_sin.c

/* Copyright (C) 1996 Free Software Foundation, Inc.
This file is part of the GNU C Library.

The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.

The GNU C Library 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
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB.  If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

#include <math.h>

#ifndef FUNC
#define FUNC sin
#endif
#ifndef float_type
#define float_type double
#endif

#define __CONCATX(a,b) __CONCAT(a,b)

float_type
__CONCATX(__kernel_,FUNC) (x, y, iy)
     float_type x;
     float_type y;
     int iy;
{
  float_type sin_x, cos_x, sin_y, cos_y;
  if (iy == 0)
    return __m81_u_(__CONCATX(__,FUNC)) (x);
  __asm__ __volatile__ ("fsincosx %2,%0:%1" : "=f" (cos_x), "=f" (sin_x)
			: "f" (x));
  __asm__ __volatile__ ("fsincosx %2,%0:%1" : "=f" (cos_y), "=f" (sin_y)
			: "f" (y));
  return sin_x * cos_y + cos_x * sin_y;
}