| /* Compute sine and cosine of argument. |
| Copyright (C) 1997 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #include <math.h> |
| |
| #include "math_private.h" |
| |
| |
| void |
| __sincosl (long double x, long double *sinx, long double *cosx) |
| { |
| int32_t se, i0, i1; |
| |
| /* High word of x. */ |
| GET_LDOUBLE_WORDS (se, i0, i1, x); |
| |
| /* |x| ~< pi/4 */ |
| se &= 0x7fff; |
| if (se < 0x3ffe || (se == 0x3ffe && i0 <= 0xc90fdaa2)) |
| { |
| *sinx = __kernel_sinl (x, 0.0, 0); |
| *cosx = __kernel_cosl (x, 0.0); |
| } |
| else if (se == 0x7fff) |
| { |
| /* sin(Inf or NaN) is NaN */ |
| *sinx = *cosx = x - x; |
| } |
| else |
| { |
| /* Argument reduction needed. */ |
| long double y[2]; |
| int n; |
| |
| n = __ieee754_rem_pio2l (x, y); |
| switch (n & 3) |
| { |
| case 0: |
| *sinx = __kernel_sinl (y[0], y[1], 1); |
| *cosx = __kernel_cosl (y[0], y[1]); |
| break; |
| case 1: |
| *sinx = __kernel_cosl (y[0], y[1]); |
| *cosx = -__kernel_sinl (y[0], y[1], 1); |
| break; |
| case 2: |
| *sinx = -__kernel_sinl (y[0], y[1], 1); |
| *cosx = -__kernel_cosl (y[0], y[1]); |
| break; |
| default: |
| *sinx = -__kernel_cosl (y[0], y[1]); |
| *cosx = __kernel_sinl (y[0], y[1], 1); |
| break; |
| } |
| } |
| } |
| weak_alias (__sincosl, sincosl) |
