-/* origin: FreeBSD /usr/src/lib/msun/src/ld80/invtrig.h */
-/*-
- * 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.
- */
-
-#include "libm.h"
+#include <float.h>
#if LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384
+/* shared by acosl, asinl and atan2l */
+#define pio2_hi __pio2_hi
+#define pio2_lo __pio2_lo
+extern const long double pio2_hi, pio2_lo;
-#define BIAS (LDBL_MAX_EXP - 1)
-#define MANH_SIZE LDBL_MANH_SIZE
-
-/* 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 */
-#define THRESH ((0xe666666666666666ULL>>(64-(MANH_SIZE-1)))|LDBL_NBIT)
-
-/* Constants shared by the long double inverse trig functions. */
-#define pS0 __pS0
-#define pS1 __pS1
-#define pS2 __pS2
-#define pS3 __pS3
-#define pS4 __pS4
-#define pS5 __pS5
-#define pS6 __pS6
-#define qS1 __qS1
-#define qS2 __qS2
-#define qS3 __qS3
-#define qS4 __qS4
-#define qS5 __qS5
-#define atanhi __atanhi
-#define atanlo __atanlo
-#define aT __aT
-#define pi_lo __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
-
-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;
-
-#ifndef STRUCT_DECLS
-static inline long double
-P(long double x)
-{
- return (x * (pS0 + x * (pS1 + x * (pS2 + x * (pS3 + x * \
- (pS4 + x * (pS5 + x * pS6)))))));
-}
-
-static inline long double
-Q(long double x)
-{
- return (1.0 + x * (qS1 + x * (qS2 + x * (qS3 + x * (qS4 + x * qS5)))));
-}
-
-static inline long double
-T_even(long double x)
-{
- return (aT[0] + x * (aT[2] + x * (aT[4] + x * (aT[6] + x * \
- (aT[8] + x * (aT[10] + x * aT[12]))))));
-}
-
-static inline long double
-T_odd(long double x)
-{
- return (aT[1] + x * (aT[3] + x * (aT[5] + x * (aT[7] + x * \
- (aT[9] + x * aT[11])))));
-}
-#endif
-
+long double __invtrigl_R(long double z);
#endif
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