44 lines
744 B
C
44 lines
744 B
C
|
|
/* @(#)z_floorf.c 1.0 98/08/13 */
|
|
/*****************************************************************
|
|
* floor
|
|
*
|
|
* Input:
|
|
* x - floating point value
|
|
*
|
|
* Output:
|
|
* Smallest integer less than x.
|
|
*
|
|
* Description:
|
|
* This routine returns the smallest integer less than x.
|
|
*
|
|
*****************************************************************/
|
|
|
|
#include "fdlibm.h"
|
|
#include "zmath.h"
|
|
|
|
float
|
|
_DEFUN (floorf, (float),
|
|
float x)
|
|
{
|
|
float f, y;
|
|
|
|
if (x > -1.0 && x < 1.0)
|
|
return (x >= 0 ? 0 : -1.0);
|
|
|
|
y = modff (x, &f);
|
|
|
|
if (y == 0.0)
|
|
return (x);
|
|
|
|
return (x >= 0 ? f : f - 1.0);
|
|
}
|
|
|
|
#ifdef _DOUBLE_IS_32BITS
|
|
double floor (double x)
|
|
{
|
|
return (double) floorf ((float) x);
|
|
}
|
|
|
|
#endif /* defined(_DOUBLE_IS_32BITS) */
|