/* Declarations for sinl, cosl, tanl internal functions
Contributed by Paolo Bonzini
- Copyright 2002, 2003 Free Software Foundation, Inc.
+ Copyright 2002-2003, 2009-2011 Free Software Foundation, Inc.
This file is part of gnulib.
- This program is free software; you can redistribute it and/or modify
+ This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
This program 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 General Public License for more details.
- You should have received a copy of the GNU General Public License along
- with this program; if not, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+/* Decompose x into x = k * π/2 + r
+ where k is an integer and abs(r) <= π/4.
+ Store r in y[0] and y[1] (main part in y[0], small additional part in
+ y[1], r = y[0] + y[1]).
+ Return k. */
extern int ieee754_rem_pio2l (long double x, long double *y);
+
+/* Compute and return sinl (x + y), where x is the main part and y is the
+ small additional part of a floating-point number.
+ iy is 0 when y is known to be 0.0, otherwise iy is 1. */
extern long double kernel_sinl (long double x, long double y, int iy);
-extern long double kernel_cosl (long double x, long double y);
+/* Compute and return cosl (x + y), where x is the main part and y is the
+ small additional part of a floating-point number. */
+extern long double kernel_cosl (long double x, long double y);