From bd5969fc876a10b18613302db7087ef3c40f18e1 Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Thu, 7 Mar 2024 17:28:00 -0500 Subject: lib: Add mlibc Signed-off-by: Ian Moffett --- lib/mlibc/options/ansi/generic/complex/cprojf.c | 67 +++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 lib/mlibc/options/ansi/generic/complex/cprojf.c (limited to 'lib/mlibc/options/ansi/generic/complex/cprojf.c') diff --git a/lib/mlibc/options/ansi/generic/complex/cprojf.c b/lib/mlibc/options/ansi/generic/complex/cprojf.c new file mode 100644 index 0000000..76c3d8a --- /dev/null +++ b/lib/mlibc/options/ansi/generic/complex/cprojf.c @@ -0,0 +1,67 @@ +/* $NetBSD: cprojf.c,v 1.3 2010/09/20 17:51:38 christos Exp $ */ + +/*- + * Copyright (c) 2010 The NetBSD Foundation, Inc. + * All rights reserved. + * + * 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 + */ + +/*__RCSID("$NetBSD: cprojf.c,v 1.3 2010/09/20 17:51:38 christos Exp $"); */ + +#include +#include + +#include "fdlibm.h" + +/* + * cprojf(float complex z) + * + * These functions return the value of the projection (not stereographic!) + * onto the Riemann sphere. + * + * z projects to z, except that all complex infinities (even those with one + * infinite part and one NaN part) project to positive infinity on the real axis. + * If z has an infinite part, then cproj(z) shall be equivalent to: + * + * INFINITY + I * copysign(0.0, cimag(z)) + */ + +float complex +cprojf(float complex z) +{ + float_complex w = { .z = z }; + + if (isinf(crealf(z)) || isinf(cimagf(z))) { +#ifdef __INFINITY + REAL_PART(w) = __INFINITY; +#else + REAL_PART(w) = INFINITY; +#endif + IMAG_PART(w) = copysignf(0.0, cimagf(z)); + } + + return (w.z); +} -- cgit v1.2.3