Last change
on this file since 403 was 337, checked in by coas-nagasima, 6 years ago |
ASP3版ECNLを追加
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Property svn:eol-style
set to
native
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Property svn:mime-type
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text/x-csrc;charset=UTF-8
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File size:
887 bytes
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1 | /* origin: FreeBSD /usr/src/lib/msun/src/e_scalbf.c */
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2 | /*
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3 | * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
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4 | */
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5 | /*
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6 | * ====================================================
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7 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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8 | *
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9 | * Developed at SunPro, a Sun Microsystems, Inc. business.
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10 | * Permission to use, copy, modify, and distribute this
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11 | * software is freely granted, provided that this notice
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12 | * is preserved.
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13 | * ====================================================
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14 | */
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15 |
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16 | #define _GNU_SOURCE
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17 | #include <math.h>
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18 |
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19 | float scalbf(float x, float fn)
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20 | {
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21 | if (isnan(x) || isnan(fn)) return x*fn;
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22 | if (!isfinite(fn)) {
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23 | if (fn > 0.0f)
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24 | return x*fn;
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25 | else
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26 | return x/(-fn);
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27 | }
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28 | if (rintf(fn) != fn) return (fn-fn)/(fn-fn);
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29 | if ( fn > 65000.0f) return scalbnf(x, 65000);
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30 | if (-fn > 65000.0f) return scalbnf(x,-65000);
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31 | return scalbnf(x,(int)fn);
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32 | }
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