diff options
Diffstat (limited to 'math/s_nextafter.c')
-rw-r--r-- | math/s_nextafter.c | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/math/s_nextafter.c b/math/s_nextafter.c deleted file mode 100644 index d2af52dda3..0000000000 --- a/math/s_nextafter.c +++ /dev/null @@ -1,100 +0,0 @@ -/* @(#)s_nextafter.c 5.1 93/09/24 */ -/* - * ==================================================== - * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. - * - * Developed at SunPro, a Sun Microsystems, Inc. business. - * Permission to use, copy, modify, and distribute this - * software is freely granted, provided that this notice - * is preserved. - * ==================================================== - */ - -#if defined(LIBM_SCCS) && !defined(lint) -static char rcsid[] = "$NetBSD: s_nextafter.c,v 1.8 1995/05/10 20:47:58 jtc Exp $"; -#endif - -/* IEEE functions - * nextafter(x,y) - * return the next machine floating-point number of x in the - * direction toward y. - * Special cases: - */ - -/* Ugly hack so that the aliasing works. */ -#define __nexttoward __internal___nexttoward -#define nexttoward __internal_nexttoward - -#include <math.h> -#include <math_private.h> -#include <float.h> - -#ifdef __STDC__ - double __nextafter(double x, double y) -#else - double __nextafter(x,y) - double x,y; -#endif -{ - int32_t hx,hy,ix,iy; - u_int32_t lx,ly; - - EXTRACT_WORDS(hx,lx,x); - EXTRACT_WORDS(hy,ly,y); - ix = hx&0x7fffffff; /* |x| */ - iy = hy&0x7fffffff; /* |y| */ - - if(((ix>=0x7ff00000)&&((ix-0x7ff00000)|lx)!=0) || /* x is nan */ - ((iy>=0x7ff00000)&&((iy-0x7ff00000)|ly)!=0)) /* y is nan */ - return x+y; - if(x==y) return y; /* x=y, return y */ - if((ix|lx)==0) { /* x == 0 */ - double u; - INSERT_WORDS(x,hy&0x80000000,1); /* return +-minsubnormal */ - u = math_opt_barrier (x); - u = u*u; - math_force_eval (u); /* raise underflow flag */ - return x; - } - if(hx>=0) { /* x > 0 */ - if(hx>hy||((hx==hy)&&(lx>ly))) { /* x > y, x -= ulp */ - if(lx==0) hx -= 1; - lx -= 1; - } else { /* x < y, x += ulp */ - lx += 1; - if(lx==0) hx += 1; - } - } else { /* x < 0 */ - if(hy>=0||hx>hy||((hx==hy)&&(lx>ly))){/* x < y, x -= ulp */ - if(lx==0) hx -= 1; - lx -= 1; - } else { /* x > y, x += ulp */ - lx += 1; - if(lx==0) hx += 1; - } - } - hy = hx&0x7ff00000; - if(hy>=0x7ff00000) { - x = x+x; /* overflow */ - if (FLT_EVAL_METHOD != 0 && FLT_EVAL_METHOD != 1) - asm ("" : "+m"(x)); - return x; /* overflow */ - } - if(hy<0x00100000) { - double u = x*x; /* underflow */ - math_force_eval (u); /* raise underflow flag */ - } - INSERT_WORDS(x,hx,lx); - return x; -} -weak_alias (__nextafter, nextafter) -#ifdef NO_LONG_DOUBLE -strong_alias (__nextafter, __nextafterl) -weak_alias (__nextafter, nextafterl) -strong_alias (__nextafter, __nexttowardl) -weak_alias (__nexttowardl, nexttowardl) -#undef __nexttoward -strong_alias (__nextafter, __nexttoward) -#undef nexttoward -weak_alias (__nextafter, nexttoward) -#endif |