Last change
on this file was 337, checked in by coas-nagasima, 6 years ago |
ASP3版ECNLを追加
|
-
Property svn:eol-style
set to
native
-
Property svn:mime-type
set to
text/x-csrc;charset=UTF-8
|
File size:
915 bytes
|
Rev | Line | |
---|
[337] | 1 | /* origin: FreeBSD /usr/src/lib/msun/src/e_scalb.c */
|
---|
| 2 | /*
|
---|
| 3 | * ====================================================
|
---|
| 4 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
|
---|
| 5 | *
|
---|
| 6 | * Developed at SunSoft, a Sun Microsystems, Inc. business.
|
---|
| 7 | * Permission to use, copy, modify, and distribute this
|
---|
| 8 | * software is freely granted, provided that this notice
|
---|
| 9 | * is preserved.
|
---|
| 10 | * ====================================================
|
---|
| 11 | */
|
---|
| 12 | /*
|
---|
| 13 | * scalb(x, fn) is provide for
|
---|
| 14 | * passing various standard test suite. One
|
---|
| 15 | * should use scalbn() instead.
|
---|
| 16 | */
|
---|
| 17 |
|
---|
| 18 | #define _GNU_SOURCE
|
---|
| 19 | #include <math.h>
|
---|
| 20 |
|
---|
| 21 | double scalb(double x, double fn)
|
---|
| 22 | {
|
---|
| 23 | if (isnan(x) || isnan(fn))
|
---|
| 24 | return x*fn;
|
---|
| 25 | if (!isfinite(fn)) {
|
---|
| 26 | if (fn > 0.0)
|
---|
| 27 | return x*fn;
|
---|
| 28 | else
|
---|
| 29 | return x/(-fn);
|
---|
| 30 | }
|
---|
| 31 | if (rint(fn) != fn) return (fn-fn)/(fn-fn);
|
---|
| 32 | if ( fn > 65000.0) return scalbn(x, 65000);
|
---|
| 33 | if (-fn > 65000.0) return scalbn(x,-65000);
|
---|
| 34 | return scalbn(x,(int)fn);
|
---|
| 35 | }
|
---|
Note:
See
TracBrowser
for help on using the repository browser.