diff options
Diffstat (limited to 'libm/src/s_nexttoward.c')
-rw-r--r-- | libm/src/s_nexttoward.c | 73 |
1 files changed, 0 insertions, 73 deletions
diff --git a/libm/src/s_nexttoward.c b/libm/src/s_nexttoward.c deleted file mode 100644 index 55da4ad..0000000 --- a/libm/src/s_nexttoward.c +++ /dev/null @@ -1,73 +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. - * ==================================================== - */ - -#ifndef lint -static char rcsid[] = "$FreeBSD: src/lib/msun/src/s_nexttoward.c,v 1.1 2005/03/07 04:56:46 das Exp $"; -#endif - -/* - * We assume that a long double has a 15-bit exponent. On systems - * where long double is the same as double, nexttoward() is an alias - * for nextafter(), so we don't use this routine. - */ - -#include <float.h> - -#include "fpmath.h" -#include "math.h" -#include "math_private.h" - -#if LDBL_MAX_EXP != 0x4000 -#error "Unsupported long double format" -#endif - -double -nexttoward(double x, long double y) -{ - union IEEEl2bits uy; - volatile double t; - int32_t hx,ix; - u_int32_t lx; - - EXTRACT_WORDS(hx,lx,x); - ix = hx&0x7fffffff; /* |x| */ - uy.e = y; - - if(((ix>=0x7ff00000)&&((ix-0x7ff00000)|lx)!=0) || - (uy.bits.exp == 0x7fff && - ((uy.bits.manh&~LDBL_NBIT)|uy.bits.manl) != 0)) - return x+y; /* x or y is nan */ - if(x==y) return (double)y; /* x=y, return y */ - if(x==0.0) { - INSERT_WORDS(x,uy.bits.sign<<31,1); /* return +-minsubnormal */ - t = x*x; - if(t==x) return t; else return x; /* raise underflow flag */ - } - if(hx>0.0 ^ x < y) { /* x -= ulp */ - if(lx==0) hx -= 1; - lx -= 1; - } else { /* x += ulp */ - lx += 1; - if(lx==0) hx += 1; - } - ix = hx&0x7ff00000; - if(ix>=0x7ff00000) return x+x; /* overflow */ - if(ix<0x00100000) { /* underflow */ - t = x*x; - if(t!=x) { /* raise underflow flag */ - INSERT_WORDS(y,hx,lx); - return y; - } - } - INSERT_WORDS(x,hx,lx); - return x; -} |