1 /* s_nextafterf.c -- float version of s_nextafter.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: src/lib/msun/src/s_nextafterf.c,v 1.11 2008/02/22 02:30:35 das Exp $";
21 #include "math_private.h"
24 nextafterf(float x
, float y
)
31 ix
= hx
&0x7fffffff; /* |x| */
32 iy
= hy
&0x7fffffff; /* |y| */
34 if((ix
>0x7f800000) || /* x is nan */
35 (iy
>0x7f800000)) /* y is nan */
37 if(x
==y
) return y
; /* x=y, return y */
38 if(ix
==0) { /* x == 0 */
39 SET_FLOAT_WORD(x
,(hy
&0x80000000)|1);/* return +-minsubnormal */
41 if(t
==x
) return t
; else return x
; /* raise underflow flag */
43 if(hx
>=0) { /* x > 0 */
44 if(hx
>hy
) { /* x > y, x -= ulp */
46 } else { /* x < y, x += ulp */
50 if(hy
>=0||hx
>hy
){ /* x < y, x -= ulp */
52 } else { /* x > y, x += ulp */
57 if(hy
>=0x7f800000) return x
+x
; /* overflow */
58 if(hy
<0x00800000) { /* underflow */
60 if(t
!=x
) { /* raise underflow flag */