1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/ossrv/genericopenlibs/openenvcore/libm/src/fpclassify.c	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,97 @@
     1.4 +/*--------------------------------------------------------------------
     1.5 + *© Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.
     1.6 + *--------------------------------------------------------------------
     1.7 +*/
     1.8 +/*-
     1.9 + * Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>
    1.10 + * Copyright (c) 2002, 2003 David Schultz <das@FreeBSD.ORG>
    1.11 + * All rights reserved.
    1.12 + *
    1.13 + * Redistribution and use in source and binary forms, with or without
    1.14 + * modification, are permitted provided that the following conditions
    1.15 + * are met:
    1.16 + * 1. Redistributions of source code must retain the above copyright
    1.17 + *    notice, this list of conditions and the following disclaimer.
    1.18 + * 2. Redistributions in binary form must reproduce the above copyright
    1.19 + *    notice, this list of conditions and the following disclaimer in the
    1.20 + *    documentation and/or other materials provided with the distribution.
    1.21 + *
    1.22 + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
    1.23 + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    1.24 + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    1.25 + * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
    1.26 + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
    1.27 + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
    1.28 + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    1.29 + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
    1.30 + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
    1.31 + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
    1.32 + * SUCH DAMAGE.
    1.33 + *
    1.34 + * $FreeBSD: src/lib/libc/gen/fpclassify.c,v 1.2 2005/02/06 03:23:31 das Exp $
    1.35 + */
    1.36 +
    1.37 +#include <sys/endian.h>
    1.38 +
    1.39 +#include <math.h>
    1.40 +#include <stdint.h>
    1.41 +
    1.42 +#include "fpmath.h"
    1.43 +
    1.44 +
    1.45 +EXPORT_C int __fpclassifyf(float f)
    1.46 +{
    1.47 +	union IEEEf2bits u;
    1.48 +
    1.49 +	u.f = f;
    1.50 +	if (u.bits.exp == 0) {
    1.51 +		if (u.bits.man == 0)
    1.52 +			return (FP_ZERO);
    1.53 +		return (FP_SUBNORMAL);
    1.54 +	}
    1.55 +	if (u.bits.exp == 255) {
    1.56 +		if (u.bits.man == 0)
    1.57 +			return (FP_INFINITE);
    1.58 +		return (FP_NAN);
    1.59 +	}
    1.60 +	return (FP_NORMAL);
    1.61 +}
    1.62 +
    1.63 +EXPORT_C int __fpclassifyd(double d)
    1.64 +{
    1.65 +	union IEEEd2bits u;
    1.66 +
    1.67 +	u.d = d;
    1.68 +	if (u.bits.exp == 0) {
    1.69 +		if ((u.bits.manl | u.bits.manh) == 0)
    1.70 +			return (FP_ZERO);
    1.71 +		return (FP_SUBNORMAL);
    1.72 +	}
    1.73 +	if (u.bits.exp == 2047) {
    1.74 +		if ((u.bits.manl | u.bits.manh) == 0)
    1.75 +			return (FP_INFINITE);
    1.76 +		return (FP_NAN);
    1.77 +	}
    1.78 +	return (FP_NORMAL);
    1.79 +}
    1.80 +
    1.81 +
    1.82 +EXPORT_C int __fpclassifyl(long double e)
    1.83 +{
    1.84 +	union IEEEl2bits u;
    1.85 +
    1.86 +	u.e = e;
    1.87 +	if (u.bits.exp == 0) {
    1.88 +		if ((u.bits.manl | u.bits.manh) == 0)
    1.89 +			return (FP_ZERO);
    1.90 +		return (FP_SUBNORMAL);
    1.91 +	}
    1.92 +	mask_nbit_l(u);		/* Mask normalization bit if applicable. */
    1.93 +	if (u.bits.exp == 32767) {
    1.94 +		if ((u.bits.manl | u.bits.manh) == 0)
    1.95 +			return (FP_INFINITE);
    1.96 +		return (FP_NAN);
    1.97 +	}
    1.98 +	return (FP_NORMAL);
    1.99 +}
   1.100 +