Last change
on this file since 692 was
581,
checked in by laurent, 9 years ago
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Adding ocean application, some mathematics functions and distributed locks
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File size:
735 bytes
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1 | /* |
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2 | * ==================================================== |
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3 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
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4 | * |
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5 | * Developed at SunPro, a Sun Microsystems, Inc. business. |
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6 | * Permission to use, copy, modify, and distribute this |
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7 | * software is freely granted, provided that this notice |
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8 | * is preserved. |
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9 | * ==================================================== |
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10 | */ |
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11 | |
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12 | /* Modified for GIET-VM static OS at UPMC, France 2015. |
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13 | */ |
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14 | |
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15 | /* |
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16 | * isnan(x) returns 1 is x is nan, else 0; |
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17 | * no branching! |
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18 | */ |
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19 | |
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20 | #include "../math.h" |
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21 | #include "math_private.h" |
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22 | |
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23 | int isnan(double x) |
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24 | { |
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25 | int32_t hx,lx; |
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26 | EXTRACT_WORDS(hx,lx,x); |
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27 | hx &= 0x7fffffff; |
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28 | hx |= (u_int32_t)(lx|(-lx))>>31; |
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29 | hx = 0x7ff00000 - hx; |
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30 | return (int)(((u_int32_t)hx)>>31); |
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31 | } |
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