diff options
Diffstat (limited to 'sysdeps/libm-ieee754/s_csqrtf.c')
| -rw-r--r-- | sysdeps/libm-ieee754/s_csqrtf.c | 110 |
1 files changed, 0 insertions, 110 deletions
diff --git a/sysdeps/libm-ieee754/s_csqrtf.c b/sysdeps/libm-ieee754/s_csqrtf.c deleted file mode 100644 index 3bc979f6e2..0000000000 --- a/sysdeps/libm-ieee754/s_csqrtf.c +++ /dev/null @@ -1,110 +0,0 @@ -/* Complex square root of float value. - Copyright (C) 1997, 1998 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 Library General Public License as - published by the Free Software Foundation; either version 2 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 - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <complex.h> -#include <math.h> - -#include "math_private.h" - - -__complex__ float -__csqrtf (__complex__ float x) -{ - __complex__ float res; - int rcls = fpclassify (__real__ x); - int icls = fpclassify (__imag__ x); - - if (rcls <= FP_INFINITE || icls <= FP_INFINITE) - { - if (icls == FP_INFINITE) - { - __real__ res = HUGE_VALF; - __imag__ res = __imag__ x; - } - else if (rcls == FP_INFINITE) - { - if (__real__ x < 0.0) - { - __real__ res = icls == FP_NAN ? __nanf ("") : 0; - __imag__ res = __copysignf (HUGE_VALF, __imag__ x); - } - else - { - __real__ res = __real__ x; - __imag__ res = (icls == FP_NAN - ? __nanf ("") : __copysignf (0.0, __imag__ x)); - } - } - else - { - __real__ res = __nanf (""); - __imag__ res = __nanf (""); - } - } - else - { - if (icls == FP_ZERO) - { - if (__real__ x < 0.0) - { - __real__ res = 0.0; - __imag__ res = __copysignf (__ieee754_sqrtf (-__real__ x), - __imag__ x); - } - else - { - __real__ res = fabsf (__ieee754_sqrtf (__real__ x)); - __imag__ res = __copysignf (0.0, __imag__ x); - } - } - else if (rcls == FP_ZERO) - { - float r = __ieee754_sqrtf (0.5 * fabsf (__imag__ x)); - - __real__ res = __copysignf (r, __imag__ x); - __imag__ res = r; - } - else - { - float d, r, s; - - d = __ieee754_hypotf (__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_sqrtf (0.5f * d + 0.5f * __real__ x); - s = (0.5f * __imag__ x) / r; - } - else - { - s = __ieee754_sqrtf (0.5f * d - 0.5f * __real__ x); - r = fabsf ((0.5f * __imag__ x) / s); - } - - __real__ res = r; - __imag__ res = __copysignf (s, __imag__ x); - } - } - - return res; -} -weak_alias (__csqrtf, csqrtf) |