2 * ====================================================
3 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
5 * Developed at SunPro, a Sun Microsystems, Inc. business.
6 * Permission to use, copy, modify, and distribute this
7 * software is freely granted, provided that this notice
9 * ====================================================
12 #include <sys/cdefs.h>
15 * Return x rounded toward 0 to integral value
19 * Inexact flag raised if x not equal to trunc(x).
25 #include "math_private.h"
27 static const double huge = 1.0e300;
34 EXTRACT_WORDS(i0,i1,x);
35 j0 = ((i0>>20)&0x7ff)-0x3ff;
37 if(j0<0) { /* raise inexact if x != 0 */
38 if(huge+x>0.0) {/* |x|<1, so return 0*sign(x) */
44 if(((i0&i)|i1)==0) return x; /* x is integral */
45 if(huge+x>0.0) { /* raise inexact flag */
50 if(j0==0x400) return x+x; /* inf or NaN */
51 else return x; /* x is integral */
53 i = ((u_int32_t)(0xffffffff))>>(j0-20);
54 if((i1&i)==0) return x; /* x is integral */
55 if(huge+x>0.0) /* raise inexact flag */
58 INSERT_WORDS(x,i0,i1);
62 #if LDBL_MANT_DIG == 53
63 __weak_reference(trunc, truncl);