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authorThe Android Open Source Project <initial-contribution@android.com>2009-03-03 18:28:13 -0800
committerThe Android Open Source Project <initial-contribution@android.com>2009-03-03 18:28:13 -0800
commit1767f908af327fa388b1c66883760ad851267013 (patch)
tree4b825dc642cb6eb9a060e54bf8d69288fbee4904 /libm/isinf.c
parenta799b53f10e5a6fd51fef4436cfb7ec99836a516 (diff)
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auto import from //depot/cupcake/@135843
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-rw-r--r--libm/isinf.c69
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diff --git a/libm/isinf.c b/libm/isinf.c
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--- a/libm/isinf.c
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-/*-
- * Copyright (c) 2004 David Schultz <das@FreeBSD.ORG>
- * 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 AUTHOR 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 AUTHOR 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.
- *
- * $FreeBSD$
- */
-
-#include <math.h>
-#include <sys/cdefs.h>
-#include "src/fpmath.h"
-
-/*
- * XXX These routines belong in libm, but they must remain in libc for
- * binary compat until we can bump libm's major version number.
- */
-
-int
-__isinf(double d)
-{
- union IEEEd2bits u;
-
- u.d = d;
- return (u.bits.exp == 2047 && u.bits.manl == 0 && u.bits.manh == 0);
-}
-
-int
-__isinff(float f)
-{
- union IEEEf2bits u;
-
- u.f = f;
- return (u.bits.exp == 255 && u.bits.man == 0);
-}
-
-int
-__isinfl(long double e)
-{
- union IEEEl2bits u;
-
- u.e = e;
- mask_nbit_l(u);
-#ifndef __alpha__
- return (u.bits.exp == 32767 && u.bits.manl == 0 && u.bits.manh == 0);
-#else
- return (u.bits.exp == 2047 && u.bits.manl == 0 && u.bits.manh == 0);
-#endif
-}
-