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39 lines
890 B
39 lines
890 B
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/* @(#)w_log.c 1.3 95/01/18 */ |
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/* |
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* ==================================================== |
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
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* |
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* Developed at SunSoft, a Sun Microsystems, Inc. business. |
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* Permission to use, copy, modify, and distribute this |
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* software is freely granted, provided that this notice |
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* is preserved. |
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* ==================================================== |
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*/ |
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/* |
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* wrapper ieee_log(x) |
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*/ |
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#include "fdlibm.h" |
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#ifdef __STDC__ |
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double ieee_log(double x) /* wrapper log */ |
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#else |
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double ieee_log(x) /* wrapper log */ |
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double x; |
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#endif |
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{ |
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#ifdef _IEEE_LIBM |
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return __ieee754_log(x); |
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#else |
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double z; |
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z = __ieee754_log(x); |
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if(_LIB_VERSION == _IEEE_ || ieee_isnan(x) || x > 0.0) return z; |
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if(x==0.0) |
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return __kernel_standard(x,x,16); /* ieee_log(0) */ |
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else |
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return __kernel_standard(x,x,17); /* ieee_log(x<0) */ |
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#endif |
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}
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