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Diffstat (limited to 'math/s_csqrtl.c')
| -rw-r--r-- | math/s_csqrtl.c | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/math/s_csqrtl.c b/math/s_csqrtl.c deleted file mode 100644 index b0b52a565c..0000000000 --- a/math/s_csqrtl.c +++ /dev/null @@ -1,161 +0,0 @@ -/* Complex square root of long double value. - Copyright (C) 1997-2016 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Based on an algorithm by Stephen L. Moshier <moshier@world.std.com>. - 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> - -__complex__ long double -__csqrtl (__complex__ long double x) -{ - __complex__ long double res; - int rcls = fpclassify (__real__ x); - int icls = fpclassify (__imag__ x); - - if (__glibc_unlikely (rcls <= FP_INFINITE || icls <= FP_INFINITE)) - { - if (icls == FP_INFINITE) - { - __real__ res = HUGE_VALL; - __imag__ res = __imag__ x; - } - else if (rcls == FP_INFINITE) - { - if (__real__ x < 0.0) - { - __real__ res = icls == FP_NAN ? __nanl ("") : 0; - __imag__ res = __copysignl (HUGE_VALL, __imag__ x); - } - else - { - __real__ res = __real__ x; - __imag__ res = (icls == FP_NAN - ? __nanl ("") : __copysignl (0.0, __imag__ x)); - } - } - else - { - __real__ res = __nanl (""); - __imag__ res = __nanl (""); - } - } - else - { - if (__glibc_unlikely (icls == FP_ZERO)) - { - if (__real__ x < 0.0) - { - __real__ res = 0.0; - __imag__ res = __copysignl (__ieee754_sqrtl (-__real__ x), - __imag__ x); - } - else - { - __real__ res = fabsl (__ieee754_sqrtl (__real__ x)); - __imag__ res = __copysignl (0.0, __imag__ x); - } - } - else if (__glibc_unlikely (rcls == FP_ZERO)) - { - long double r; - if (fabsl (__imag__ x) >= 2.0L * LDBL_MIN) - r = __ieee754_sqrtl (0.5L * fabsl (__imag__ x)); - else - r = 0.5L * __ieee754_sqrtl (2.0L * fabsl (__imag__ x)); - - __real__ res = r; - __imag__ res = __copysignl (r, __imag__ x); - } - else - { - long double d, r, s; - int scale = 0; - - if (fabsl (__real__ x) > LDBL_MAX / 4.0L) - { - scale = 1; - __real__ x = __scalbnl (__real__ x, -2 * scale); - __imag__ x = __scalbnl (__imag__ x, -2 * scale); - } - else if (fabsl (__imag__ x) > LDBL_MAX / 4.0L) - { - scale = 1; - if (fabsl (__real__ x) >= 4.0L * LDBL_MIN) - __real__ x = __scalbnl (__real__ x, -2 * scale); - else - __real__ x = 0.0L; - __imag__ x = __scalbnl (__imag__ x, -2 * scale); - } - else if (fabsl (__real__ x) < 2.0L * LDBL_MIN - && fabsl (__imag__ x) < 2.0L * LDBL_MIN) - { - scale = -((LDBL_MANT_DIG + 1) / 2); - __real__ x = __scalbnl (__real__ x, -2 * scale); - __imag__ x = __scalbnl (__imag__ x, -2 * scale); - } - - d = __ieee754_hypotl (__real__ x, __imag__ x); - /* Use the identity 2 Re res Im res = Im x - to avoid cancellation error in d +/- Re x. */ - if (__real__ x > 0) - { - r = __ieee754_sqrtl (0.5L * (d + __real__ x)); - if (scale == 1 && fabsl (__imag__ x) < 1.0L) - { - /* Avoid possible intermediate underflow. */ - s = __imag__ x / r; - r = __scalbnl (r, scale); - scale = 0; - } - else - s = 0.5L * (__imag__ x / r); - } - else - { - s = __ieee754_sqrtl (0.5L * (d - __real__ x)); - if (scale == 1 && fabsl (__imag__ x) < 1.0L) - { - /* Avoid possible intermediate underflow. */ - r = fabsl (__imag__ x / s); - s = __scalbnl (s, scale); - scale = 0; - } - else - r = fabsl (0.5L * (__imag__ x / s)); - } - - if (scale) - { - r = __scalbnl (r, scale); - s = __scalbnl (s, scale); - } - - math_check_force_underflow (r); - math_check_force_underflow (s); - - __real__ res = r; - __imag__ res = __copysignl (s, __imag__ x); - } - } - - return res; -} -weak_alias (__csqrtl, csqrtl) |