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35 lines
594 B
C
35 lines
594 B
C
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/* @(#)z_logf.c 1.0 98/08/13 */
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/******************************************************************
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* Logarithm
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*
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* Input:
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* x - floating point value
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*
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* Output:
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* natural logarithm of x
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*
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* Description:
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* This routine returns the natural logarithm of x.
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*
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*****************************************************************/
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#include "fdlibm.h"
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#include "zmath.h"
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float
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_DEFUN (logf, (float),
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float x)
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{
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return (logarithmf (x, 0));
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}
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#ifdef _DOUBLE_IS_32BITS
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double log (double x)
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{
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return (double) logf ((float) x);
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}
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#endif /* defined(_DOUBLE_IS_32BITS) */
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