diff options
Diffstat (limited to 'math/s_clog_template.c')
| -rw-r--r-- | math/s_clog_template.c | 119 |
1 files changed, 0 insertions, 119 deletions
diff --git a/math/s_clog_template.c b/math/s_clog_template.c deleted file mode 100644 index feb801ff07..0000000000 --- a/math/s_clog_template.c +++ /dev/null @@ -1,119 +0,0 @@ -/* Compute complex natural logarithm. - 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> -#include <math_private.h> -#include <float.h> - -CFLOAT -M_DECL_FUNC (__clog) (CFLOAT x) -{ - CFLOAT result; - int rcls = fpclassify (__real__ x); - int icls = fpclassify (__imag__ x); - - if (__glibc_unlikely (rcls == FP_ZERO && icls == FP_ZERO)) - { - /* Real and imaginary part are 0.0. */ - __imag__ result = signbit (__real__ x) ? (FLOAT) M_MLIT (M_PI) : 0; - __imag__ result = M_COPYSIGN (__imag__ result, __imag__ x); - /* Yes, the following line raises an exception. */ - __real__ result = -1 / M_FABS (__real__ x); - } - else if (__glibc_likely (rcls != FP_NAN && icls != FP_NAN)) - { - /* Neither real nor imaginary part is NaN. */ - FLOAT absx = M_FABS (__real__ x), absy = M_FABS (__imag__ x); - int scale = 0; - - if (absx < absy) - { - FLOAT t = absx; - absx = absy; - absy = t; - } - - if (absx > M_MAX / 2) - { - scale = -1; - absx = M_SCALBN (absx, scale); - absy = (absy >= M_MIN * 2 ? M_SCALBN (absy, scale) : 0); - } - else if (absx < M_MIN && absy < M_MIN) - { - scale = M_MANT_DIG; - absx = M_SCALBN (absx, scale); - absy = M_SCALBN (absy, scale); - } - - if (absx == 1 && scale == 0) - { - __real__ result = M_LOG1P (absy * absy) / 2; - math_check_force_underflow_nonneg (__real__ result); - } - else if (absx > 1 && absx < 2 && absy < 1 && scale == 0) - { - FLOAT d2m1 = (absx - 1) * (absx + 1); - if (absy >= M_EPSILON) - d2m1 += absy * absy; - __real__ result = M_LOG1P (d2m1) / 2; - } - else if (absx < 1 - && absx >= M_LIT (0.5) - && absy < M_EPSILON / 2 - && scale == 0) - { - FLOAT d2m1 = (absx - 1) * (absx + 1); - __real__ result = M_LOG1P (d2m1) / 2; - } - else if (absx < 1 - && absx >= M_LIT (0.5) - && scale == 0 - && absx * absx + absy * absy >= M_LIT (0.5)) - { - FLOAT d2m1 = M_SUF (__x2y2m1) (absx, absy); - __real__ result = M_LOG1P (d2m1) / 2; - } - else - { - FLOAT d = M_HYPOT (absx, absy); - __real__ result = M_LOG (d) - scale * (FLOAT) M_MLIT (M_LN2); - } - - __imag__ result = M_ATAN2 (__imag__ x, __real__ x); - } - else - { - __imag__ result = M_NAN; - if (rcls == FP_INFINITE || icls == FP_INFINITE) - /* Real or imaginary part is infinite. */ - __real__ result = M_HUGE_VAL; - else - __real__ result = M_NAN; - } - - return result; -} - -declare_mgen_alias (__clog, clog) - -#if M_LIBM_NEED_COMPAT (clog) -declare_mgen_libm_compat (__clog, clog) -#endif |