Last change
on this file since 636 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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Rev | Line | |
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[581] | 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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