| /* Compute sine and cosine of argument. |

| Copyright (C) 1997-2018 Free Software Foundation, Inc. |

| This file is part of the GNU C Library. |

| Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997 and |

| Jakub Jelinek <jj@ultra.linux.cz>. |

| |

| 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, see |

| <http://www.gnu.org/licenses/>. */ |

| |

| #include "quadmath-imp.h" |

| |

| void |

| sincosq (__float128 x, __float128 *sinx, __float128 *cosx) |

| { |

| int64_t ix; |

| |

| /* High word of x. */ |

| GET_FLT128_MSW64 (ix, x); |

| |

| /* |x| ~< pi/4 */ |

| ix &= 0x7fffffffffffffffLL; |

| if (ix <= 0x3ffe921fb54442d1LL) |

| __quadmath_kernel_sincosq (x, 0, sinx, cosx, 0); |

| else if (ix >= 0x7fff000000000000LL) |

| { |

| /* sin(Inf or NaN) is NaN */ |

| *sinx = *cosx = x - x; |

| if (isinfq (x)) |

| errno = EDOM; |

| } |

| else |

| { |

| /* Argument reduction needed. */ |

| __float128 y[2]; |

| int n; |

| |

| n = __quadmath_rem_pio2q (x, y); |

| switch (n & 3) |

| { |

| case 0: |

| __quadmath_kernel_sincosq (y[0], y[1], sinx, cosx, 1); |

| break; |

| case 1: |

| __quadmath_kernel_sincosq (y[0], y[1], cosx, sinx, 1); |

| *cosx = -*cosx; |

| break; |

| case 2: |

| __quadmath_kernel_sincosq (y[0], y[1], sinx, cosx, 1); |

| *sinx = -*sinx; |

| *cosx = -*cosx; |

| break; |

| default: |

| __quadmath_kernel_sincosq (y[0], y[1], cosx, sinx, 1); |

| *sinx = -*sinx; |

| break; |

| } |

| } |

| } |