diff options
Diffstat (limited to 'lib/mlibc/options/ansi/generic/complex/csqrtf.c')
| -rw-r--r-- | lib/mlibc/options/ansi/generic/complex/csqrtf.c | 102 |
1 files changed, 0 insertions, 102 deletions
diff --git a/lib/mlibc/options/ansi/generic/complex/csqrtf.c b/lib/mlibc/options/ansi/generic/complex/csqrtf.c deleted file mode 100644 index 13451fa..0000000 --- a/lib/mlibc/options/ansi/generic/complex/csqrtf.c +++ /dev/null @@ -1,102 +0,0 @@ -/* $NetBSD: csqrtf.c,v 1.1 2007/08/20 16:01:37 drochner Exp $ */ - -/*- - * Copyright (c) 2007 The NetBSD Foundation, Inc. - * All rights reserved. - * - * This code is derived from software written by Stephen L. Moshier. - * It is redistributed by the NetBSD Foundation by permission of the author. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS - * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED - * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS - * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - * - * imported and modified include for newlib 2010/10/03 - * Marco Atzeri <marco_atzeri@yahoo.it> - */ - -#include <complex.h> -#include <math.h> - -float complex -csqrtf(float complex z) -{ - float complex w; - float x, y, r, t, scale; - - x = crealf (z); - y = cimagf (z); - - if (y == 0.0f) { - if (x < 0.0f) { - w = 0.0f + sqrtf(-x) * I; - return w; - } else if (x == 0.0f) { - return (0.0f + y * I); - } else { - w = sqrtf(x) + y * I; - return w; - } - } - - if (x == 0.0f) { - r = fabsf(y); - r = sqrtf(0.5f * r); - if (y > 0) - w = r + r * I; - else - w = r - r * I; - return w; - } - - /* Rescale to avoid internal overflow or underflow. */ - if ((fabsf(x) > 4.0f) || (fabsf(y) > 4.0f)) { - x *= 0.25f; - y *= 0.25f; - scale = 2.0f; - } else { -#if 1 - x *= 6.7108864e7f; /* 2^26 */ - y *= 6.7108864e7f; - scale = 1.220703125e-4f; /* 2^-13 */ -#else - x *= 4.0f; - y *= 4.0f; - scale = 0.5f; -#endif - } - w = x + y * I; - r = cabsf(w); - if( x > 0 ) { - t = sqrtf(0.5f * r + 0.5f * x); - r = scale * fabsf((0.5f * y) / t); - t *= scale; - } else { - r = sqrtf(0.5f * r - 0.5f * x); - t = scale * fabsf((0.5f * y) / r); - r *= scale; - } - - if (y < 0) - w = t - r * I; - else - w = t + r * I; - return w; -} |