12116Sjkh/* s_ceilf.c -- float version of s_ceil.c.
22116Sjkh * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
32116Sjkh */
42116Sjkh
52116Sjkh/*
62116Sjkh * ====================================================
72116Sjkh * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
82116Sjkh *
92116Sjkh * Developed at SunPro, a Sun Microsystems, Inc. business.
102116Sjkh * Permission to use, copy, modify, and distribute this
118870Srgrimes * software is freely granted, provided that this notice
122116Sjkh * is preserved.
132116Sjkh * ====================================================
142116Sjkh */
152116Sjkh
16176451Sdas#include <sys/cdefs.h>
17176451Sdas__FBSDID("$FreeBSD$");
182116Sjkh
192116Sjkh#include "math.h"
202116Sjkh#include "math_private.h"
212116Sjkh
222116Sjkhstatic const float huge = 1.0e30;
232116Sjkh
2497413Salfredfloat
2597413Salfredceilf(float x)
262116Sjkh{
272116Sjkh	int32_t i0,j0;
282116Sjkh	u_int32_t i;
292116Sjkh
302116Sjkh	GET_FLOAT_WORD(i0,x);
312116Sjkh	j0 = ((i0>>23)&0xff)-0x7f;
322116Sjkh	if(j0<23) {
332116Sjkh	    if(j0<0) { 	/* raise inexact if x != 0 */
342116Sjkh		if(huge+x>(float)0.0) {/* return 0*sign(x) if |x|<1 */
358870Srgrimes		    if(i0<0) {i0=0x80000000;}
362116Sjkh		    else if(i0!=0) { i0=0x3f800000;}
372116Sjkh		}
382116Sjkh	    } else {
392116Sjkh		i = (0x007fffff)>>j0;
402116Sjkh		if((i0&i)==0) return x; /* x is integral */
412116Sjkh		if(huge+x>(float)0.0) {	/* raise inexact flag */
422116Sjkh		    if(i0>0) i0 += (0x00800000)>>j0;
432116Sjkh		    i0 &= (~i);
442116Sjkh		}
452116Sjkh	    }
462116Sjkh	} else {
472116Sjkh	    if(j0==0x80) return x+x;	/* inf or NaN */
482116Sjkh	    else return x;		/* x is integral */
492116Sjkh	}
502116Sjkh	SET_FLOAT_WORD(x,i0);
512116Sjkh	return x;
522116Sjkh}
53