diff options
Diffstat (limited to 'sysdeps/libm-ieee754/s_nearbyint.c')
-rw-r--r-- | sysdeps/libm-ieee754/s_nearbyint.c | 98 |
1 files changed, 0 insertions, 98 deletions
diff --git a/sysdeps/libm-ieee754/s_nearbyint.c b/sysdeps/libm-ieee754/s_nearbyint.c deleted file mode 100644 index 32f5bf9447..0000000000 --- a/sysdeps/libm-ieee754/s_nearbyint.c +++ /dev/null @@ -1,98 +0,0 @@ -/* Adapted for use as nearbyint by Ulrich Drepper <drepper@cygnus.com>. */ -/* - * ==================================================== - * 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_rint.c,v 1.8 1995/05/10 20:48:04 jtc Exp $"; -#endif - -/* - * rint(x) - * Return x rounded to integral value according to the prevailing - * rounding mode. - * Method: - * Using floating addition. - * Exception: - * Inexact flag raised if x not equal to rint(x). - */ - -#include <fenv.h> -#include "math.h" -#include "math_private.h" - -#ifdef __STDC__ -static const double -#else -static double -#endif -TWO52[2]={ - 4.50359962737049600000e+15, /* 0x43300000, 0x00000000 */ - -4.50359962737049600000e+15, /* 0xC3300000, 0x00000000 */ -}; - -#ifdef __STDC__ - double __nearbyint(double x) -#else - double __nearbyint(x) - double x; -#endif -{ - fenv_t env; - int32_t i0,j0,sx; - u_int32_t i,i1; - double w,t; - EXTRACT_WORDS(i0,i1,x); - sx = (i0>>31)&1; - j0 = ((i0>>20)&0x7ff)-0x3ff; - if(j0<20) { - if(j0<0) { - if(((i0&0x7fffffff)|i1)==0) return x; - i1 |= (i0&0x0fffff); - i0 &= 0xfffe0000; - i0 |= ((i1|-i1)>>12)&0x80000; - SET_HIGH_WORD(x,i0); - feholdexcept (&env); - w = TWO52[sx]+x; - t = w-TWO52[sx]; - fesetenv (&env); - GET_HIGH_WORD(i0,t); - SET_HIGH_WORD(t,(i0&0x7fffffff)|(sx<<31)); - return t; - } else { - i = (0x000fffff)>>j0; - if(((i0&i)|i1)==0) return x; /* x is integral */ - i>>=1; - if(((i0&i)|i1)!=0) { - if(j0==19) i1 = 0x40000000; else - i0 = (i0&(~i))|((0x20000)>>j0); - } - } - } else if (j0>51) { - if(j0==0x400) return x+x; /* inf or NaN */ - else return x; /* x is integral */ - } else { - i = ((u_int32_t)(0xffffffff))>>(j0-20); - if((i1&i)==0) return x; /* x is integral */ - i>>=1; - if((i1&i)!=0) i1 = (i1&(~i))|((0x40000000)>>(j0-20)); - } - INSERT_WORDS(x,i0,i1); - feholdexcept (&env); - w = TWO52[sx]+x; - t = w-TWO52[sx]; - fesetenv (&env); - return t; -} -weak_alias (__nearbyint, nearbyint) -#ifdef NO_LONG_DOUBLE -strong_alias (__nearbyint, __nearbyintl) -weak_alias (__nearbyint, nearbyintl) -#endif |