1 /* k_sinf.c -- float version of k_sin.c
2 Copyright (C) 2011-2014 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Adhemerval Zanella <azanella@br.ibm.com>, 2011
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Library General Public License as
8 published by the Free Software Foundation; either version 2 of the
9 License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Library General Public License for more details.
16 You should have received a copy of the GNU Library General Public
17 License along with the GNU C Library; see the file COPYING.LIB. If
18 not, see <http://www.gnu.org/licenses/>. */
22 #include <math_private.h>
25 static const float twom27
= 7.4505806000e-09;
26 static const float half
= 5.0000000000e-01;
27 static const float S1
= -1.6666667163e-01;
28 static const float S2
= 8.3333337680e-03;
29 static const float S3
= -1.9841270114e-04;
30 static const float S4
= 2.7557314297e-06;
31 static const float S5
= -2.5050759689e-08;
32 static const float S6
= 1.5896910177e-10;
36 __kernel_sinf (float x
, float y
, int iy
)
40 ix
= __builtin_fabsf (x
);
43 __feraiseexcept (FE_INEXACT
);
48 r
= S2
+ z
* (S3
+ z
* (S4
+ z
* (S5
+ z
* S6
)));
50 return x
+ v
* (S1
+ z
* r
);
52 return x
- ((z
* (half
* y
- v
* r
) - y
) - v
* S1
);