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4973 | right-hear | 1 | /* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */ |
2 | /* @(#)w_sqrt.c 5.1 93/09/24 */ |
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3 | /* |
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4 | * ==================================================== |
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5 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
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6 | * |
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7 | * Developed at SunPro, a Sun Microsystems, Inc. business. |
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8 | * Permission to use, copy, modify, and distribute this |
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9 | * software is freely granted, provided that this notice |
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10 | * is preserved. |
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11 | * ==================================================== |
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12 | */ |
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13 | |||
14 | #if defined(LIBM_SCCS) && !defined(lint) |
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15 | static char rcsid[] = "$Id: w_sqrt.c,v 1.4 1994/08/10 20:35:48 jtc Exp $"; |
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16 | #endif |
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17 | |||
18 | /* |
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19 | * wrapper sqrt(x) |
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20 | */ |
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21 | |||
22 | #include "math.h" |
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23 | #include "math_private.h" |
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24 | |||
25 | #ifdef __STDC__ |
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26 | double sqrt(double x) /* wrapper sqrt */ |
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27 | #else |
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28 | double sqrt(x) /* wrapper sqrt */ |
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29 | double x; |
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30 | #endif |
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31 | { |
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32 | #ifdef _IEEE_LIBM |
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33 | return __ieee754_sqrt(x); |
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34 | #else |
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35 | double z; |
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36 | z = __ieee754_sqrt(x); |
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37 | if(_LIB_VERSION == _IEEE_ || isnan(x)) return z; |
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38 | if(x<0.0) { |
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39 | return __kernel_standard(x,x,26); /* sqrt(negative) */ |
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40 | } else |
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41 | return z; |
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42 | #endif |
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43 | }0.0)> |