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/* Complex cosine function. m68k fpu version
Copyright (C) 1997, 1999 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>.
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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <complex.h>
#include <math.h>
#include "mathimpl.h"
#ifndef SUFF
#define SUFF
#endif
#ifndef float_type
#define float_type double
#endif
#define CONCATX(a,b) __CONCAT(a,b)
#define s(name) CONCATX(name,SUFF)
#define m81(func) __m81_u(s(func))
__complex__ float_type
s(__ccos) (__complex__ float_type x)
{
__complex__ float_type retval;
unsigned long rx_cond = __m81_test (__real__ x);
if ((rx_cond & (__M81_COND_INF|__M81_COND_NAN)) == 0)
{
/* Real part is finite. */
float_type sin_rx, cos_rx;
__asm ("fsincos%.x %2,%1:%0" : "=f" (sin_rx), "=f" (cos_rx)
: "f" (__real__ x));
__real__ retval = cos_rx * m81(__ieee754_cosh) (__imag__ x);
if (rx_cond & __M81_COND_ZERO)
__imag__ retval = (m81(__signbit) (__imag__ x)
? __real__ x : -__real__ x);
else
__imag__ retval = -sin_rx * m81(__ieee754_sinh) (__imag__ x);
}
else
{
unsigned long ix_cond = __m81_test (__imag__ x);
if (ix_cond & __M81_COND_INF)
__real__ retval = s(fabs) (__imag__ x);
else
__real__ retval = __real__ x - __real__ x;
if (ix_cond & __M81_COND_ZERO)
__imag__ retval = __imag__ x;
else
__imag__ retval = __real__ x - __real__ x;
}
return retval;
}
#define weak_aliasx(a,b) weak_alias(a,b)
weak_aliasx (s(__ccos), s(ccos))
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