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Diffstat (limited to 'lib/msun/src/s_isnan.c')
-rw-r--r-- | lib/msun/src/s_isnan.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/lib/msun/src/s_isnan.c b/lib/msun/src/s_isnan.c new file mode 100644 index 0000000..0f544db --- /dev/null +++ b/lib/msun/src/s_isnan.c @@ -0,0 +1,64 @@ +/*- + * 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 "fpmath.h" + +/* Provided by libc */ +#if 0 +int +isnan(double d) +{ + union IEEEd2bits u; + + u.d = d; + return (u.bits.exp == 2047 && (u.bits.manl != 0 || u.bits.manh != 0)); +} +#endif + +int +__isnanf(float f) +{ + union IEEEf2bits u; + + u.f = f; + return (u.bits.exp == 255 && u.bits.man != 0); +} + +int +__isnanl(long double e) +{ + union IEEEl2bits u; + + u.e = e; + mask_nbit_l(u); + return (u.bits.exp == 32767 && (u.bits.manl != 0 || u.bits.manh != 0)); +} + +__weak_reference(__isnanf, isnanf); |