diff options
Diffstat (limited to 'REORG.TODO/sysdeps/ieee754/flt-32/s_sincosf.c')
| -rw-r--r-- | REORG.TODO/sysdeps/ieee754/flt-32/s_sincosf.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/ieee754/flt-32/s_sincosf.c b/REORG.TODO/sysdeps/ieee754/flt-32/s_sincosf.c new file mode 100644 index 0000000000..3ab92ee0ba --- /dev/null +++ b/REORG.TODO/sysdeps/ieee754/flt-32/s_sincosf.c @@ -0,0 +1,84 @@ +/* Compute sine and cosine of argument. + Copyright (C) 1997-2017 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, see + <http://www.gnu.org/licenses/>. */ + +#include <errno.h> +#include <math.h> + +#include <math_private.h> + +#ifndef SINCOSF +# define SINCOSF_FUNC __sincosf +#else +# define SINCOSF_FUNC SINCOSF +#endif + +void +SINCOSF_FUNC (float x, float *sinx, float *cosx) +{ + int32_t ix; + + /* High word of x. */ + GET_FLOAT_WORD (ix, x); + + /* |x| ~< pi/4 */ + ix &= 0x7fffffff; + if (ix <= 0x3f490fd8) + { + *sinx = __kernel_sinf (x, 0.0, 0); + *cosx = __kernel_cosf (x, 0.0); + } + else if (ix>=0x7f800000) + { + /* sin(Inf or NaN) is NaN */ + *sinx = *cosx = x - x; + if (ix == 0x7f800000) + __set_errno (EDOM); + } + else + { + /* Argument reduction needed. */ + float y[2]; + int n; + + n = __ieee754_rem_pio2f (x, y); + switch (n & 3) + { + case 0: + *sinx = __kernel_sinf (y[0], y[1], 1); + *cosx = __kernel_cosf (y[0], y[1]); + break; + case 1: + *sinx = __kernel_cosf (y[0], y[1]); + *cosx = -__kernel_sinf (y[0], y[1], 1); + break; + case 2: + *sinx = -__kernel_sinf (y[0], y[1], 1); + *cosx = -__kernel_cosf (y[0], y[1]); + break; + default: + *sinx = -__kernel_cosf (y[0], y[1]); + *cosx = __kernel_sinf (y[0], y[1], 1); + break; + } + } +} + +#ifndef SINCOSF +weak_alias (__sincosf, sincosf) +#endif |