Last change
on this file since 631 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:
793 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 | * finite(x) returns 1 is x is finite, 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 isfinite(double x) |
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| 24 | { |
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| 25 | u_int32_t hx; |
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| 26 | |
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| 27 | GET_HIGH_WORD(hx, x); |
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| 28 | /* Finite numbers have at least one zero bit in exponent. */ |
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| 29 | /* All other numbers will result in 0xffffffff after OR: */ |
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| 30 | return (hx | 0x800fffff) != 0xffffffff; |
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| 31 | } |
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| 32 | |
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