1 /* s_nextafterl.c -- long double version of s_nextafter.c.
2 * Conversion to long double by Ulrich Drepper,
3 * Cygnus Support, drepper@cygnus.com.
4 * Fixed for m68k by Andreas Schwab <schwab@suse.de>.
8 * ====================================================
9 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
11 * Developed at SunPro, a Sun Microsystems, Inc. business.
12 * Permission to use, copy, modify, and distribute this
13 * software is freely granted, provided that this notice
15 * ====================================================
18 #if defined(LIBM_SCCS) && !defined(lint)
19 static char rcsid[] = "$NetBSD: $";
24 * return the next machine floating-point number of x in the
30 #include <math_private.h>
32 long double __nextafterl(long double x, long double y)
34 int32_t ix,iy,esx,esy;
35 u_int32_t hx,hy,lx,ly;
37 GET_LDOUBLE_WORDS(esx,hx,lx,x);
38 GET_LDOUBLE_WORDS(esy,hy,ly,y);
39 ix = esx&0x7fff; /* |x| */
40 iy = esy&0x7fff; /* |y| */
42 if(((ix==0x7fff)&&((hx&0x7fffffff)|lx)!=0) || /* x is nan */
43 ((iy==0x7fff)&&((hy&0x7fffffff)|ly)!=0)) /* y is nan */
45 if(x==y) return y; /* x=y, return y */
46 if((ix|hx|lx)==0) { /* x == 0 */
47 SET_LDOUBLE_WORDS(x,esy&0x8000,0,1);/* return +-minsubnormal */
49 math_force_eval (y); /* raise underflow flag */
52 if(esx>=0) { /* x > 0 */
53 if(esx>esy||((esx==esy) && (hx>hy||((hx==hy)&&(lx>ly))))) {
56 if (ix != 0 && hx == 0x80000000) hx = 0;
61 } else { /* x < y, x += ulp */
72 if(esy>=0||esx>esy||((esx==esy) && (hx>hy||((hx==hy)&&(lx>ly))))){
75 if (ix != 0 && hx == 0x80000000) hx = 0;
80 } else { /* x > y, x += ulp */
92 if(esy==0x7fff) return x+x; /* overflow */
93 if(esy==0 && (hx & 0x80000000) == 0) { /* underflow */
95 math_force_eval (y); /* raise underflow flag */
97 SET_LDOUBLE_WORDS(x,esx,hx,lx);
100 weak_alias (__nextafterl, nextafterl)
101 strong_alias (__nextafterl, __nexttowardl)
102 weak_alias (__nextafterl, nexttowardl)