mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-27 15:30:07 +00:00
41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
118 lines
3.2 KiB
C
118 lines
3.2 KiB
C
/* Complex exponential 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 Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; 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(__cexp) (__complex__ float_type x)
|
|
{
|
|
__complex__ float_type retval;
|
|
unsigned long ix_cond;
|
|
|
|
ix_cond = __m81_test (__imag__ x);
|
|
|
|
if ((ix_cond & (__M81_COND_NAN|__M81_COND_INF)) == 0)
|
|
{
|
|
/* Imaginary part is finite. */
|
|
float_type exp_val = m81(__ieee754_exp) (__real__ x);
|
|
|
|
__real__ retval = __imag__ retval = exp_val;
|
|
if (m81(__finite) (exp_val))
|
|
{
|
|
float_type sin_ix, cos_ix;
|
|
__asm ("fsincos%.x %2,%1:%0" : "=f" (sin_ix), "=f" (cos_ix)
|
|
: "f" (__imag__ x));
|
|
__real__ retval *= cos_ix;
|
|
if (ix_cond & __M81_COND_ZERO)
|
|
__imag__ retval = __imag__ x;
|
|
else
|
|
__imag__ retval *= sin_ix;
|
|
}
|
|
else
|
|
{
|
|
/* Compute the sign of the result. */
|
|
float_type remainder, pi_2;
|
|
int quadrant;
|
|
|
|
__asm ("fmovecr %#0,%0\n\tfscale%.w %#-1,%0" : "=f" (pi_2));
|
|
__asm ("fmod%.x %2,%0\n\tfmove%.l %/fpsr,%1"
|
|
: "=f" (remainder), "=dm" (quadrant)
|
|
: "f" (pi_2), "0" (__imag__ x));
|
|
quadrant = (quadrant >> 16) & 0x83;
|
|
if (quadrant & 0x80)
|
|
quadrant ^= 0x83;
|
|
switch (quadrant)
|
|
{
|
|
default:
|
|
break;
|
|
case 1:
|
|
__real__ retval = -__real__ retval;
|
|
break;
|
|
case 2:
|
|
__real__ retval = -__real__ retval;
|
|
case 3:
|
|
__imag__ retval = -__imag__ retval;
|
|
break;
|
|
}
|
|
if (ix_cond & __M81_COND_ZERO && !m81(__isnan) (exp_val))
|
|
__imag__ retval = __imag__ x;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
unsigned long rx_cond = __m81_test (__real__ x);
|
|
|
|
if (rx_cond & __M81_COND_INF)
|
|
{
|
|
/* Real part is infinite. */
|
|
if (rx_cond & __M81_COND_NEG)
|
|
{
|
|
__real__ retval = __imag__ retval = 0.0;
|
|
if (ix_cond & __M81_COND_NEG)
|
|
__imag__ retval = -__imag__ retval;
|
|
}
|
|
else
|
|
{
|
|
__real__ retval = __real__ x;
|
|
__imag__ retval = __imag__ x - __imag__ x;
|
|
}
|
|
}
|
|
else
|
|
__real__ retval = __imag__ retval = __imag__ x - __imag__ x;
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
#define weak_aliasx(a,b) weak_alias(a,b)
|
|
weak_aliasx (s(__cexp), s(cexp))
|