1 /* rintq.c -- __float128 version of s_rint.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 * ====================================================
18 * Return x rounded to integral value according to the prevailing
21 * Using floating addition.
23 * Inexact flag raised if x not equal to rintq(x).
26 #include "quadmath-imp.h"
28 static const __float128
30 5.19229685853482762853049632922009600E+33Q
, /* 0x406F000000000000, 0 */
31 -5.19229685853482762853049632922009600E+33Q
/* 0xC06F000000000000, 0 */
38 uint64_t i1
__attribute__ ((unused
));
40 GET_FLT128_WORDS64(i0
,i1
,x
);
41 sx
= (((uint64_t)i0
)>>63);
42 j0
= ((i0
>>48)&0x7fff)-0x3fff;
47 GET_FLT128_MSW64(i0
,t
);
48 SET_FLT128_MSW64(t
,(i0
&0x7fffffffffffffffLL
)|(sx
<<63));
52 if(j0
==0x4000) return x
+x
; /* inf or NaN */
53 else return x
; /* x is integral */