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finite for 64-bit platforms

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Ulrich Drepper 2011-09-15 23:01:56 -04:00
parent 2840865d5a
commit 88738eb6e9
2 changed files with 34 additions and 0 deletions
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ChangeLog
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2011-09-15 Ulrich Drepper <drepper@gmail.com>
* sysdeps/ieee754/dbl-64/wordsize-64/s_finite.c: New file.
* sysdeps/unix/sysv/linux/bits/in.h (IP_MULTICAST_ALL): Define.
Patch mostly by Neil Horman <nhorman@tuxdriver.com>.

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sysdeps/ieee754/dbl-64/wordsize-64/s_finite.c Normal file
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/*
* ====================================================
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
*
* Developed at SunPro, a Sun Microsystems, Inc. business.
* Permission to use, copy, modify, and distribute this
* software is freely granted, provided that this notice
* is preserved.
* ====================================================
*/
/*
* finite(x) returns 1 is x is finite, else 0;
* no branching!
*/
#include "math.h"
#include "math_private.h"
int
__finite(double x)
{
int64_t lx;
EXTRACT_WORDS64(lx,x);
return (int)((uint64_t)((lx&INT64_C(0x7fffffffffffffff))-INT64_C(0x7ff0000000000000))>>63);
}
hidden_def (__finite)
weak_alias (__finite, finite)
#ifdef NO_LONG_DOUBLE
strong_alias (__finite, __finitel)
weak_alias (__finite, finitel)
#endif