1 /* sf_floor.c -- float version of s_floor.c.
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
6 * ====================================================
7 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
9 * Developed at SunPro, a Sun Microsystems, Inc. business.
10 * Permission to use, copy, modify, and distribute this
11 * software is freely granted, provided that this notice
13 * ====================================================
18 * Return x rounded toward -inf to integral value
22 * Inexact flag raised if x not equal to floorf(x).
28 static const float huge = 1.0e30;
30 static float huge = 1.0e30;
46 if(j0<0) { /* raise inexact if x != 0 */
47 if(huge+x>(float)0.0) {/* return 0*sign(x) if |x|<1 */
49 else if(!FLT_UWORD_IS_ZERO(ix))
54 if((i0&i)==0) return x; /* x is integral */
55 if(huge+x>(float)0.0) { /* raise inexact flag */
56 if(i0<0) i0 += (0x00800000)>>j0;
61 if(!FLT_UWORD_IS_FINITE(ix)) return x+x; /* inf or NaN */
62 else return x; /* x is integral */
68 #ifdef _DOUBLE_IS_32BITS
71 double floor(double x)
77 return (double) floorf((float) x);
80 #endif /* defined(_DOUBLE_IS_32BITS) */