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author | The Android Open Source Project <initial-contribution@android.com> | 2008-10-21 07:00:00 -0700 |
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committer | The Android Open Source Project <initial-contribution@android.com> | 2008-10-21 07:00:00 -0700 |
commit | a27d2baa0c1a2ec70f47ea9199b1dd6762c8a349 (patch) | |
tree | defd1cc07d16ad2f3b21154114e092d11c94c5bb /libm/isinf.c | |
download | bionic-a27d2baa0c1a2ec70f47ea9199b1dd6762c8a349.zip bionic-a27d2baa0c1a2ec70f47ea9199b1dd6762c8a349.tar.gz bionic-a27d2baa0c1a2ec70f47ea9199b1dd6762c8a349.tar.bz2 |
Initial Contributionandroid-1.0
Diffstat (limited to 'libm/isinf.c')
-rw-r--r-- | libm/isinf.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/libm/isinf.c b/libm/isinf.c new file mode 100644 index 0000000..2da8f58 --- /dev/null +++ b/libm/isinf.c @@ -0,0 +1,69 @@ +/*- + * 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 +} + |