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