support/fdlibm/s_significand.c
author Jan Vrany <jan.vrany@fit.cvut.cz>
Wed, 23 Jan 2013 12:31:33 +0000
branchdevelopment
changeset 1988 0fcf5a5dcb66
parent 1818 2e5ed72e7dfd
child 2380 9195eccdcbd9
permissions -rw-r--r--
Cleanup in JavaRelease: javaHome/jreHome/jdkHome.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
986
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
     1
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
     2
/* @(#)s_significand.c 1.3 95/01/18 */
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
     3
/*
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
     4
 * ====================================================
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
     5
 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
     6
 *
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
     7
 * Developed at SunSoft, a Sun Microsystems, Inc. business.
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
     8
 * Permission to use, copy, modify, and distribute this
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
     9
 * software is freely granted, provided that this notice 
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
    10
 * is preserved.
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
    11
 * ====================================================
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
    12
 */
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
    13
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
    14
/*
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
    15
 * significand(x) computes just
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
    16
 * 	scalb(x, (double) -ilogb(x)),
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
    17
 * for exercising the fraction-part(F) IEEE 754-1985 test vector.
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
    18
 */
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
    19
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
    20
#include "fdlibm.h"
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
    21
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
    22
#ifdef __STDC__
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
    23
	double significand(double x)
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
    24
#else
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
    25
	double significand(x)
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
    26
	double x;
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
    27
#endif
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
    28
{
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
    29
	return __ieee754_scalb(x,(double) -ilogb(x));
a53b146a146d Added fdlibm for IEE754-style double arithmetics
vranyj1
parents:
diff changeset
    30
}