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1/* Copyright (C) 2000-2019 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Richard Henderson.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library. If not, see
17 <http://www.gnu.org/licenses/>. */
18
19#define NO_MATH_REDIRECT
20#include <math.h>
21#include <math_ldbl_opt.h>
22#include <libm-alias-double.h>
23
24
25double
26__rint (double x)
27{
28 if (isnan (x))
29 return x + x;
30
31 if (isless (fabs (x), 9007199254740992.0)) /* 1 << DBL_MANT_DIG */
32 {
33 double tmp1, new_x;
34 __asm ("cvttq/svid %2,%1\n\t"
35 "cvtqt/d %1,%0\n\t"
36 : "=f"(new_x), "=&f"(tmp1)
37 : "f"(x));
38
39 /* rint(-0.1) == -0, and in general we'll always have the same
40 sign as our input. */
41 x = copysign(new_x, x);
42 }
43 return x;
44}
45
46libm_alias_double (__rint, rint)
47

Warning: That file was not part of the compilation database. It may have many parsing errors.