diff options
Diffstat (limited to 'REORG.TODO/math/s_cacos_template.c')
-rw-r--r-- | REORG.TODO/math/s_cacos_template.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/REORG.TODO/math/s_cacos_template.c b/REORG.TODO/math/s_cacos_template.c new file mode 100644 index 0000000000..7629e55436 --- /dev/null +++ b/REORG.TODO/math/s_cacos_template.c @@ -0,0 +1,59 @@ +/* Return cosine of a complex type. + 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 <complex.h> +#include <math.h> + +CFLOAT +M_DECL_FUNC (__cacos) (CFLOAT x) +{ + CFLOAT y; + CFLOAT res; + int rcls = fpclassify (__real__ x); + int icls = fpclassify (__imag__ x); + + if (rcls <= FP_INFINITE || icls <= FP_INFINITE + || (rcls == FP_ZERO && icls == FP_ZERO)) + { + y = M_SUF (__casin) (x); + + __real__ res = (FLOAT) M_MLIT (M_PI_2) - __real__ y; + if (__real__ res == 0) + __real__ res = 0; + __imag__ res = -__imag__ y; + } + else + { + __real__ y = -__imag__ x; + __imag__ y = __real__ x; + + y = M_SUF (__kernel_casinh) (y, 1); + + __real__ res = __imag__ y; + __imag__ res = __real__ y; + } + + return res; +} + +declare_mgen_alias (__cacos, cacos); + +#if M_LIBM_NEED_COMPAT (carg) +declare_mgen_libm_compat (__cacos, cacos) +#endif |