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/* Complex sine function. m68k fpu version
Copyright (C) 1997-2021 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, see
<https://www.gnu.org/licenses/>. */
#include <complex.h>
#include <math.h>
#include "mathimpl.h"
#define s(name) M_SUF (name)
#define m81(func) __m81_u(s(func))
CFLOAT
s(__csin) (CFLOAT x)
{
CFLOAT retval;
unsigned long rx_cond = __m81_test (__real__ x);
if ((rx_cond & (__M81_COND_INF|__M81_COND_NAN)) == 0)
{
/* Real part is finite. */
FLOAT sin_rx, cos_rx;
__asm ("fsincos%.x %2,%1:%0" : "=f" (sin_rx), "=f" (cos_rx)
: "f" (__real__ x));
if (rx_cond & __M81_COND_ZERO)
__real__ retval = __real__ x;
else
__real__ retval = sin_rx * m81(__ieee754_cosh) (__imag__ x);
__imag__ retval = cos_rx * m81(__ieee754_sinh) (__imag__ x);
}
else
{
unsigned long ix_cond = __m81_test (__imag__ x);
__real__ retval = __real__ x - __real__ x;
if (ix_cond & (__M81_COND_ZERO|__M81_COND_INF|__M81_COND_NAN))
__imag__ retval = __imag__ x;
else
__imag__ retval = __real__ retval;
}
return retval;
}
declare_mgen_alias (__csin, csin)
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