1 /* s_floorl.c -- long double version of s_floor.c.
2 * Conversion to IEEE quad long double by Jakub Jelinek, jj@ultra.linux.cz.
6 * ====================================================
7 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
9 * Developed at SunPro, a Sun Microsystems, Inc. business.
10 * Permission to use, copy, modify, and distribute this
11 * software is freely granted, provided that this notice
13 * ====================================================
16 #if defined(LIBM_SCCS) && !defined(lint)
17 static char rcsid[] = "$NetBSD: $";
22 * Return x rounded toward -inf to integral value
26 * Inexact flag raised if x not equal to floor(x).
30 #include "math_private.h"
33 static const long double huge = 1.0e4930L;
35 static long double huge = 1.0e4930L;
39 long double __floorl(long double x)
41 long double __floorl(x)
47 GET_LDOUBLE_WORDS64(i0,i1,x);
48 j0 = ((i0>>48)&0x7fff)-0x3fff;
50 if(j0<0) { /* raise inexact if x != 0 */
51 if(huge+x>0.0) {/* return 0*sign(x) if |x|<1 */
53 else if(((i0&0x7fffffffffffffffLL)|i1)!=0)
54 { i0=0xbfff000000000000ULL;i1=0;}
57 i = (0x0000ffffffffffffULL)>>j0;
58 if(((i0&i)|i1)==0) return x; /* x is integral */
59 if(huge+x>0.0) { /* raise inexact flag */
60 if(i0<0) i0 += (0x0001000000000000LL)>>j0;
65 if(j0==0x4000) return x+x; /* inf or NaN */
66 else return x; /* x is integral */
69 if((i1&i)==0) return x; /* x is integral */
70 if(huge+x>0.0) { /* raise inexact flag */
74 j = i1+(1LL<<(112-j0));
75 if(j<i1) i0 +=1 ; /* got a carry */
82 SET_LDOUBLE_WORDS64(x,i0,i1);
85 weak_alias (__floorl, floorl)