diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-128ibm/s_sincosl.c')
| -rw-r--r-- | sysdeps/ieee754/ldbl-128ibm/s_sincosl.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/sysdeps/ieee754/ldbl-128ibm/s_sincosl.c b/sysdeps/ieee754/ldbl-128ibm/s_sincosl.c new file mode 100644 index 0000000..1d3d7a4 --- /dev/null +++ b/sysdeps/ieee754/ldbl-128ibm/s_sincosl.c @@ -0,0 +1,72 @@ +/* Compute sine and cosine of argument. + Copyright (C) 1997,1999,2004,2006 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <math.h> + +#include "math_private.h" +#include <math_ldbl_opt.h> + +void +__sincosl (long double x, long double *sinx, long double *cosx) +{ + int64_t ix; + + /* High word of x. */ + GET_LDOUBLE_MSW64 (ix, x); + + /* |x| ~< pi/4 */ + ix &= 0x7fffffffffffffffLL; + if (ix <= 0x3fe921fb54442d10LL) + __kernel_sincosl (x, 0.0L, sinx, cosx, 0); + else if (ix >= 0x7ff0000000000000LL) + { + /* 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: + __kernel_sincosl (y[0], y[1], sinx, cosx, 1); + break; + case 1: + __kernel_sincosl (y[0], y[1], cosx, sinx, 1); + *cosx = -*cosx; + break; + case 2: + __kernel_sincosl (y[0], y[1], sinx, cosx, 1); + *sinx = -*sinx; + *cosx = -*cosx; + break; + default: + __kernel_sincosl (y[0], y[1], cosx, sinx, 1); + *sinx = -*sinx; + break; + } + } +} +long_double_symbol (libm, __sincosl, sincosl); |