1 /*-
2 * Copyright (c) 2004 David Schultz <das@FreeBSD.ORG>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: src/lib/msun/ia64/fenv.c,v 1.2 2004/06/11 02:35:30 das Exp $
27 */
28
29 #include <sys/types.h>
30 #include <fenv.h>
31
32 const fenv_t __fe_dfl_env = 0x0009804c8a70033fULL;
33
34 /*
35 * It doesn't pay to inline feupdateenv() because it includes one of
36 * the rare uses of feraiseexcept() where the argument is not a
37 * constant. Thus, no dead code elimination can occur, resulting in
38 * significant bloat.
39 */
40 int
feupdateenv(const fenv_t * envp)41 feupdateenv(const fenv_t *envp)
42 {
43 fenv_t fpsr;
44
45 __stfpsr(&fpsr);
46 __ldfpsr(*envp);
47 feraiseexcept((fpsr >> _FPUSW_SHIFT) & FE_ALL_EXCEPT);
48 return (0);
49 }
50