Last change
on this file since 450 was
444,
checked in by satin@…, 6 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
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File size:
842 bytes
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Line | |
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1 | /* sf_c_isnan.c -- float version of s_c_isnan.c. |
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2 | */ |
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3 | |
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4 | /* |
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5 | * ==================================================== |
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6 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
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7 | * |
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8 | * Developed at SunPro, a Sun Microsystems, Inc. business. |
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9 | * Permission to use, copy, modify, and distribute this |
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10 | * software is freely granted, provided that this notice |
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11 | * is preserved. |
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12 | * ==================================================== |
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13 | */ |
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14 | |
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15 | /* |
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16 | * isnanf(x) returns 1 is x is nan, else 0; |
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17 | * |
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18 | * isnanf is an extension declared in <math.h>. |
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19 | */ |
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20 | |
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21 | #include "fdlibm.h" |
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22 | #include <ieeefp.h> |
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23 | |
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24 | #undef isnanf |
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25 | |
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26 | int |
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27 | isnanf (float x) |
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28 | { |
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29 | __int32_t ix; |
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30 | GET_FLOAT_WORD(ix,x); |
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31 | ix &= 0x7fffffff; |
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32 | return FLT_UWORD_IS_NAN(ix); |
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33 | } |
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34 | |
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35 | #ifdef _DOUBLE_IS_32BITS |
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36 | |
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37 | #undef isnan |
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38 | |
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39 | int |
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40 | isnan (double x) |
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41 | { |
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42 | return isnanf((float) x); |
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43 | } |
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44 | |
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45 | #endif /* defined(_DOUBLE_IS_32BITS) */ |
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