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 * ====================================================
13 static char rcsid[] = "$FreeBSD$";
20 #include "math_private.h"
22 #define LDBL_INFNAN_EXP (LDBL_MAX_EXP * 2 - 1)
25 nexttowardf(float x, long double y)
32 ix = hx&0x7fffffff; /* |x| */
36 (uy.bits.exp == LDBL_INFNAN_EXP &&
37 ((uy.bits.manh&~LDBL_NBIT)|uy.bits.manl) != 0))
38 return x+y; /* x or y is nan */
39 if(x==y) return (float)y; /* x=y, return y */
40 if(ix==0) { /* x == 0 */
41 SET_FLOAT_WORD(x,(uy.bits.sign<<31)|1);/* return +-minsubnormal */
43 if(t==x) return t; else return x; /* raise underflow flag */
45 if(hx>=0 ^ x < y) /* x -= ulp */
50 if(ix>=0x7f800000) return x+x; /* overflow */
51 if(ix<0x00800000) { /* underflow */
53 if(t!=x) { /* raise underflow flag */