/*	$OpenBSD: invtrig.h,v 1.2 2016/09/12 19:47:03 guenther Exp $	*/

/*-

 * Copyright (c) 2008 David Schultz <das@FreeBSD.ORG>

 * 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, 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.

 *

 * $FreeBSD: src/lib/msun/ld80/invtrig.h,v 1.2 2008/08/02 03:56:22 das Exp $

 */

#include <sys/types.h>

#include <machine/ieee.h>

#include <float.h>

#define	BIAS		(LDBL_MAX_EXP - 1)

#define	MANH_SIZE	EXT_FRACHBITS

/* Approximation thresholds. */

#define	ASIN_LINEAR	(BIAS - 32)	/* 2**-32 */

#define	ACOS_CONST	(BIAS - 65)	/* 2**-65 */

#define	ATAN_CONST	(BIAS + 65)	/* 2**65 */

#define	ATAN_LINEAR	(BIAS - 32)	/* 2**-32 */

/* 0.95 */

#ifdef EXT_IMPLICIT_NBIT

#define	THRESH	(0xe666666666666666ULL>>(64-(MANH_SIZE-1)))

#else /* EXT_IMPLICIT_NBIT */

#define	THRESH	((0xe666666666666666ULL>>(64-(MANH_SIZE-1)))|0x80000000)

#endif /* EXT_IMPLICIT_NBIT */

/* Constants shared by the long double inverse trig functions. */

#define	pS0	_ItL_pS0

#define	pS1	_ItL_pS1

#define	pS2	_ItL_pS2

#define	pS3	_ItL_pS3

#define	pS4	_ItL_pS4

#define	pS5	_ItL_pS5

#define	pS6	_ItL_pS6

#define	qS1	_ItL_qS1

#define	qS2	_ItL_qS2

#define	qS3	_ItL_qS3

#define	qS4	_ItL_qS4

#define	qS5	_ItL_qS5

#define	atanhi	_ItL_atanhi

#define	atanlo	_ItL_atanlo

#define	aT	_ItL_aT

#define	pi_lo	_ItL_pi_lo

#define	pio2_hi	atanhi[3]

#define	pio2_lo	atanlo[3]

#define	pio4_hi	atanhi[1]

#ifdef STRUCT_DECLS

typedef struct longdouble {

	uint64_t mant;

	uint16_t expsign;

} LONGDOUBLE;

#else

typedef long double LONGDOUBLE;

#endif

__BEGIN_HIDDEN_DECLS

extern const LONGDOUBLE pS0, pS1, pS2, pS3, pS4, pS5, pS6;

extern const LONGDOUBLE qS1, qS2, qS3, qS4, qS5;

extern const LONGDOUBLE atanhi[], atanlo[], aT[];

extern const LONGDOUBLE pi_lo;

__END_HIDDEN_DECLS

#ifndef STRUCT_DECLS

static inline long double

P(long double x)

{

}

static inline long double

Q(long double x)

{

}

static inline long double

T_even(long double x)

{

}

static inline long double

T_odd(long double x)

{

}

#endif