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>
28 float __nexttowardf(float x, long double y)
30 float __nexttowardf(x,y)
39 EXTRACT_WORDS(hy,ly,y);
40 ix = hx&0x7fffffff; /* |x| */
41 iy = hy&0x7fffffff; /* |y| */
43 if((ix>0x7f800000) || /* x is nan */
44 ((iy>=0x7ff00000)&&((iy-0x7ff00000)|ly)!=0)) /* y is nan */
46 if((long double) x==y) return y; /* x=y, return y */
47 if(ix==0) { /* x == 0 */
49 SET_FLOAT_WORD(x,(u_int32_t)(hy&0x80000000)|1);/* return +-minsub*/
50 u = math_opt_barrier (x);
52 math_force_eval (u); /* raise underflow flag */
55 if(hx>=0) { /* x > 0 */
56 if(hy<0||(ix>>23)>(iy>>20)-0x380
57 || ((ix>>23)==(iy>>20)-0x380
58 && (ix&0x7fffff)>(((hy<<3)|(ly>>29))&0x7fffff))) /* x > y, x -= ulp */
60 else /* x < y, x += ulp */
63 if(hy>=0||(ix>>23)>(iy>>20)-0x380
64 || ((ix>>23)==(iy>>20)-0x380
65 && (ix&0x7fffff)>(((hy<<3)|(ly>>29))&0x7fffff))) /* x < y, x -= ulp */
67 else /* x > y, x += ulp */
72 x = x+x; /* overflow */
73 if (FLT_EVAL_METHOD != 0)
74 /* Force conversion to float. */
79 float u = x*x; /* underflow */
80 math_force_eval (u); /* raise underflow flag */
85 weak_alias (__nexttowardf, nexttowardf)