1 /* s_rintf.c -- float version of s_rint.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 * ====================================================
17 static char rcsid[] = "$FreeBSD$";
21 #include "math_private.h"
24 * TWO23 is double instead of float to avoid a bug in gcc. Without
25 * this, gcc thinks that TWO23[sx]+x and w-TWO23[sx] already have float
26 * precision and doesn't clip them to float precision when they are
27 * assigned and returned.
31 8.3886080000e+06, /* 0x4b000000 */
32 -8.3886080000e+06, /* 0xcb000000 */
43 j0 = ((i0>>23)&0xff)-0x7f;
46 if((i0&0x7fffffff)==0) return x;
49 i0 |= ((i1|-i1)>>9)&0x400000;
54 SET_FLOAT_WORD(t,(i0&0x7fffffff)|(sx<<31));
58 if((i0&i)==0) return x; /* x is integral */
60 if((i0&i)!=0) i0 = (i0&(~i))|((0x100000)>>j0);
63 if(j0==0x80) return x+x; /* inf or NaN */
64 else return x; /* x is integral */