/*-
* Copyright (c) 2007, 2010-2013 Steven G. Kargl
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* s_sinl.c and s_cosl.c merged by Steven G. Kargl.
*/
#include <sys/cdefs.h>
#if 0
__FBSDID("$FreeBSD: head/lib/msun/src/s_sincosl.c 319047 2017-05-28 06:13:38Z mmel $");
#endif
#if defined(LIBM_SCCS) && !defined(lint)
__RCSID("$NetBSD: s_sincosl.c,v 1.2 2022/08/27 17:15:52 christos Exp $");
#endif
#include "namespace.h"
#include <float.h>
#ifdef __i386__
#include <ieeefp.h>
#endif
#include "math.h"
#include "math_private.h"
#ifdef __HAVE_LONG_DOUBLE
#include "k_sincosl.h"
#if LDBL_MANT_DIG == 64
#include "../ld80/e_rem_pio2l.h"
#elif LDBL_MANT_DIG == 113
#include "../ld128/e_rem_pio2l.h"
#else
#error "Unsupported long double format"
#endif
#ifdef __weak_alias
__weak_alias(sincosl,_sincosl)
#endif
void
sincosl(long double x, long double *sn, long double *cs)
{
union ieee_ext_u z;
int e0;
long double y[2];
z.extu_ld = x;
z.extu_sign = 0;
ENTERV();
/* Optimize the case where x is already within range. */
if (z.extu_ld < M_PI_4) {
/*
* If x = +-0 or x is a subnormal number, then sin(x) = x and
* cos(x) = 1.
*/
if (z.extu_exp == 0) {
*sn = x;
*cs = 1;
} else
__kernel_sincosl(x, 0, 0, sn, cs);
RETURNV();
}
/* If x = NaN or Inf, then sin(x) and cos(x) are NaN. */
if (z.extu_exp == 32767) {
*sn = x - x;
*cs = x - x;
RETURNV();
}
/* Range reduction. */
e0 = __ieee754_rem_pio2l(x, y);
switch (e0 & 3) {
case 0:
__kernel_sincosl(y[0], y[1], 1, sn, cs);
break;
case 1:
__kernel_sincosl(y[0], y[1], 1, cs, sn);
*cs = -*cs;
break;
case 2:
__kernel_sincosl(y[0], y[1], 1, sn, cs);
*sn = -*sn;
*cs = -*cs;
break;
default:
__kernel_sincosl(y[0], y[1], 1, cs, sn);
*sn = -*sn;
}
RETURNV();
}
#endif