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- /* Copyright (C) 1993 Hongjiu Lu
- Changed by Olaf Flebbe for long double
- This file is part of the Linux C Library.
-
- The Linux C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- The Linux 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
- Library General Public License for more details. */
-
- #include <ansidecl.h>
- #include <fp.h>
- #include <errno.h>
- #include "mathl.h"
-
- long double
- DEFUN(asinl, (x), long double x)
- {
- long double y;
-
- if (x <= -1.0L ) {
- if (x == -1.0L) {
- return -1.57079632679489661923L;
- }
- return __infnanl( EDOM);
- }
-
- if (x >= 1.0L ) {
- if (x == 1.0L) {
- return 1.57079632679489661923L;
- }
- return __infnanl( EDOM);
- }
-
- y = sqrtl (1.0L - x * x);
- __asm__ __volatile__ ("fpatan"
- :"=t" (y) : "0" (y), "u" (x));
- return y;
- }
-