43 lines
719 B
C
43 lines
719 B
C
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/* @(#)z_floorf.c 1.0 98/08/13 */
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/*****************************************************************
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* floor
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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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* Smallest integer less than x.
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*
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* Description:
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* This routine returns the smallest integer less than 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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floorf (float x)
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{
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float f, y;
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if (x > -1.0 && x < 1.0)
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return (x >= 0 ? 0 : -1.0);
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y = modff (x, &f);
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if (y == 0.0)
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return (x);
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return (x >= 0 ? f : f - 1.0);
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}
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#ifdef _DOUBLE_IS_32BITS
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double floor (double x)
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{
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return (double) floorf ((float) x);
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}
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#endif /* defined(_DOUBLE_IS_32BITS) */
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