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Diffstat (limited to 'REORG.TODO/math/s_ccosh_template.c')
| -rw-r--r-- | REORG.TODO/math/s_ccosh_template.c | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/REORG.TODO/math/s_ccosh_template.c b/REORG.TODO/math/s_ccosh_template.c new file mode 100644 index 0000000000..1ee6014374 --- /dev/null +++ b/REORG.TODO/math/s_ccosh_template.c @@ -0,0 +1,141 @@ +/* Complex cosine hyperbolic function for float types. + 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 <fenv.h> +#include <math.h> +#include <math_private.h> +#include <float.h> + +CFLOAT +M_DECL_FUNC (__ccosh) (CFLOAT x) +{ + CFLOAT retval; + int rcls = fpclassify (__real__ x); + int icls = fpclassify (__imag__ x); + + if (__glibc_likely (rcls >= FP_ZERO)) + { + /* Real part is finite. */ + if (__glibc_likely (icls >= FP_ZERO)) + { + /* Imaginary part is finite. */ + const int t = (int) ((M_MAX_EXP - 1) * M_MLIT (M_LN2)); + FLOAT sinix, cosix; + + if (__glibc_likely (M_FABS (__imag__ x) > M_MIN)) + { + M_SINCOS (__imag__ x, &sinix, &cosix); + } + else + { + sinix = __imag__ x; + cosix = 1; + } + + if (M_FABS (__real__ x) > t) + { + FLOAT exp_t = M_EXP (t); + FLOAT rx = M_FABS (__real__ x); + if (signbit (__real__ x)) + sinix = -sinix; + rx -= t; + sinix *= exp_t / 2; + cosix *= exp_t / 2; + if (rx > t) + { + rx -= t; + sinix *= exp_t; + cosix *= exp_t; + } + if (rx > t) + { + /* Overflow (original real part of x > 3t). */ + __real__ retval = M_MAX * cosix; + __imag__ retval = M_MAX * sinix; + } + else + { + FLOAT exp_val = M_EXP (rx); + __real__ retval = exp_val * cosix; + __imag__ retval = exp_val * sinix; + } + } + else + { + __real__ retval = M_COSH (__real__ x) * cosix; + __imag__ retval = M_SINH (__real__ x) * sinix; + } + + math_check_force_underflow_complex (retval); + } + else + { + __imag__ retval = __real__ x == 0 ? 0 : M_NAN; + __real__ retval = __imag__ x - __imag__ x; + } + } + else if (rcls == FP_INFINITE) + { + /* Real part is infinite. */ + if (__glibc_likely (icls > FP_ZERO)) + { + /* Imaginary part is finite. */ + FLOAT sinix, cosix; + + if (__glibc_likely (M_FABS (__imag__ x) > M_MIN)) + { + M_SINCOS (__imag__ x, &sinix, &cosix); + } + else + { + sinix = __imag__ x; + cosix = 1; + } + + __real__ retval = M_COPYSIGN (M_HUGE_VAL, cosix); + __imag__ retval = (M_COPYSIGN (M_HUGE_VAL, sinix) + * M_COPYSIGN (1, __real__ x)); + } + else if (icls == FP_ZERO) + { + /* Imaginary part is 0.0. */ + __real__ retval = M_HUGE_VAL; + __imag__ retval = __imag__ x * M_COPYSIGN (1, __real__ x); + } + else + { + __real__ retval = M_HUGE_VAL; + __imag__ retval = __imag__ x - __imag__ x; + } + } + else + { + __real__ retval = M_NAN; + __imag__ retval = __imag__ x == 0 ? __imag__ x : M_NAN; + } + + return retval; +} + +declare_mgen_alias (__ccosh, ccosh); + +#if M_LIBM_NEED_COMPAT (carg) +declare_mgen_libm_compat (__ccosh, ccosh) +#endif |