math: clean up inverse trigonometric functions

[musl] / src / math / __invtrigl.h

diff --git a/src/math/__invtrigl.h b/src/math/__invtrigl.h
index 22748b6..cac465c 100644 (file)
--- a/src/math/__invtrigl.h
+++ b/src/math/__invtrigl.h
@@ -1,68 +1,10 @@
-/* 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
-
-#define BIAS            (LDBL_MAX_EXP - 1)
-#define MANH_SIZE       LDBL_MANH_SIZE
-
-/* 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 pi_hi   __pi_hi
-#define pi_lo   __pi_lo
+/* shared by acosl, asinl and atan2l */
 #define pio2_hi __pio2_hi
 #define pio2_lo __pio2_lo
+extern const long double pio2_hi, pio2_lo;
 
-extern const long double pS0, pS1, pS2, pS3, pS4, pS5, pS6;
-extern const long double qS1, qS2, qS3, qS4, qS5;
-extern const long double pi_hi, pi_lo, pio2_hi, pio2_lo;
-
-static long double P(long double x)
-{
-       return x * (pS0 + x * (pS1 + x * (pS2 + x * (pS3 +
-               x * (pS4 + x * (pS5 + x * pS6))))));
-}
-
-static long double Q(long double x)
-{
-       return 1.0 + x * (qS1 + x * (qS2 + x * (qS3 + x * (qS4 + x * qS5))));
-}
-
+long double __invtrigl_R(long double z);
 #endif