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m68k specific implementation for cexp for double.

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This commit is contained in:
Ulrich Drepper 1997-04-02 14:45:04 +00:00
parent 57d377f1f9
commit bc6dd76e40
1 changed files with 92 additions and 0 deletions
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sysdeps/m68k/fpu/s_cexp.c Normal file
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/* Complex exponential function. m68k fpu version
Copyright (C) 1997 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. */
#define __LIBC_M81_MATH_INLINES
#include <complex.h>
#include <math.h>
#ifndef SUFF
#define SUFF
#endif
#ifndef huge_val
#define huge_val HUGE_VAL
#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(__cexp) (__complex__ float_type x)
{
__complex__ float_type retval;
float_type sin_ix, cos_ix;
if (m81(__finite) (__real__ x))
{
if (m81(__finite) (__imag__ x))
{
float_type exp_val = s(__exp) (__real__ x);
__asm ("fsincos%.x %2,%1:%0" : "=f" (sin_ix), "=f" (cos_ix)
: "f" (__imag__ x));
__real__ retval = exp_val * cos_ix;
__imag__ retval = exp_val * sin_ix;
}
else
/* If the imaginary part is +-inf or NaN and the real part is
not +-inf the result is NaN + iNaN. */
__real__ retval = __imag__ retval = 0.0/0.0;
}
else if (m81(__isinf) (__real__ x))
{
if (m81(__finite) (__imag__ x))
{
if (m81(__signbit) (__real__ x) == 0 && __imag__ x == 0.0)
retval = huge_val;
else
{
float_type value = m81(__signbit) (__real__ x) ? 0.0 : huge_val;
__asm ("fsincos%.x %2,%1:%0" : "=f" (sin_ix), "=f" (cos_ix)
: "f" (__imag__ x));
__real__ retval = value * cos_ix;
__imag__ retval = value * sin_ix;
}
}
else if (m81(__signbit) (__real__ x) == 0)
{
__real__ retval = huge_val;
__imag__ retval = 0.0/0.0;
}
else
retval = 0.0;
}
else
/* If the real part is NaN the result is NaN + iNaN. */
__real__ retval = __imag__ retval = 0.0/0.0;
return retval;
}
#define weak_aliasx(a,b) weak_alias(a,b)
weak_aliasx (s(__cexp), s(cexp))