1 /* Single precision version of nexttoward.c.
2 Conversion to IEEE single float by Jakub Jelinek, jj@ultra.linux.cz. */
4 * ====================================================
5 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
7 * Developed at SunPro, a Sun Microsystems, Inc. business.
8 * Permission to use, copy, modify, and distribute this
9 * software is freely granted, provided that this notice
11 * ====================================================
16 * return the next machine floating-point number of x in the
18 * This is for machines which use the same binary type for double and
24 #include <math_private.h>
27 float __nexttowardf(float x, long double y)
33 EXTRACT_WORDS(hy,ly,y);
34 ix = hx&0x7fffffff; /* |x| */
35 iy = hy&0x7fffffff; /* |y| */
37 if((ix>0x7f800000) || /* x is nan */
38 ((iy>=0x7ff00000)&&((iy-0x7ff00000)|ly)!=0)) /* y is nan */
40 if((long double) x==y) return y; /* x=y, return y */
41 if(ix==0) { /* x == 0 */
43 SET_FLOAT_WORD(x,(u_int32_t)(hy&0x80000000)|1);/* return +-minsub*/
44 u = math_opt_barrier (x);
46 math_force_eval (u); /* raise underflow flag */
49 if(hx>=0) { /* x > 0 */
50 if(x > y) /* x -= ulp */
52 else /* x < y, x += ulp */
55 if(x < y) /* x -= ulp */
57 else /* x > y, x += ulp */
62 x = x+x; /* overflow */
63 if (FLT_EVAL_METHOD != 0)
64 /* Force conversion to float. */
69 float u = x*x; /* underflow */
70 math_force_eval (u); /* raise underflow flag */
75 weak_alias (__nexttowardf, nexttowardf)