/* s_floorf.c -- float version of s_floor.c.

 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.

 */

/*

 * ====================================================

 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.

 *

 * Developed at SunPro, a Sun Microsystems, Inc. business.

 * Permission to use, copy, modify, and distribute this

 * software is freely granted, provided that this notice

 * is preserved.

 * ====================================================

 */

/*

 * floorf(x)

 * Return x rounded toward -inf to integral value

 * Method:

 *	Bit twiddling.

 */

#include <math.h>

#include <math_private.h>

#include <libm-alias-float.h>

#include <math-use-builtins.h>

float

__floorf(float x)

{

#if USE_FLOORF_BUILTIN

  return __builtin_floorf (x);

#else

  /* Use generic implementation.  */

	int32_t i0,j0;

	uint32_t i;

	GET_FLOAT_WORD(i0,x);

	j0 = ((i0>>23)&0xff)-0x7f;

	if(j0<23) {

	    if(j0<0) {

		/* return 0*sign(x) if |x|<1 */

		if(i0>=0) {i0=0;}

		else if((i0&0x7fffffff)!=0)

		  { i0=0xbf800000;}

	    } else {

		i = (0x007fffff)>>j0;

		if((i0&i)==0) return x; /* x is integral */

		if(i0<0) i0 += (0x00800000)>>j0;

		i0 &= (~i);

	    }

	} else {

	    if(__builtin_expect(j0==0x80, 0)) return x+x; /* inf or NaN */

	    else return x;		/* x is integral */

	}

	SET_FLOAT_WORD(x,i0);

	return x;

#endif /* ! USE_FLOORF_BUILTIN  */

}

#ifndef __floorf

libm_alias_float (__floor, floor)

#endif