1*2fe8fb19SBen Gras /* $NetBSD: fpgetsticky.c,v 1.2 2008/04/28 20:22:57 martin Exp $ */
2*2fe8fb19SBen Gras
3*2fe8fb19SBen Gras /*
4*2fe8fb19SBen Gras * Copyright (c) 1999 The NetBSD Foundation, Inc.
5*2fe8fb19SBen Gras * All rights reserved.
6*2fe8fb19SBen Gras *
7*2fe8fb19SBen Gras * This code is derived from software contributed to The NetBSD Foundation
8*2fe8fb19SBen Gras * by Dan Winship.
9*2fe8fb19SBen Gras *
10*2fe8fb19SBen Gras * Redistribution and use in source and binary forms, with or without
11*2fe8fb19SBen Gras * modification, are permitted provided that the following conditions
12*2fe8fb19SBen Gras * are met:
13*2fe8fb19SBen Gras * 1. Redistributions of source code must retain the above copyright
14*2fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer.
15*2fe8fb19SBen Gras * 2. Redistributions in binary form must reproduce the above copyright
16*2fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer in the
17*2fe8fb19SBen Gras * documentation and/or other materials provided with the distribution.
18*2fe8fb19SBen Gras *
19*2fe8fb19SBen Gras * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20*2fe8fb19SBen Gras * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21*2fe8fb19SBen Gras * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22*2fe8fb19SBen Gras * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23*2fe8fb19SBen Gras * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24*2fe8fb19SBen Gras * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25*2fe8fb19SBen Gras * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26*2fe8fb19SBen Gras * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27*2fe8fb19SBen Gras * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28*2fe8fb19SBen Gras * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29*2fe8fb19SBen Gras * POSSIBILITY OF SUCH DAMAGE.
30*2fe8fb19SBen Gras */
31*2fe8fb19SBen Gras
32*2fe8fb19SBen Gras #include <sys/cdefs.h>
33*2fe8fb19SBen Gras #if defined(LIBC_SCCS) && !defined(lint)
34*2fe8fb19SBen Gras __RCSID("$NetBSD: fpgetsticky.c,v 1.2 2008/04/28 20:22:57 martin Exp $");
35*2fe8fb19SBen Gras #endif /* LIBC_SCCS and not lint */
36*2fe8fb19SBen Gras
37*2fe8fb19SBen Gras #include "namespace.h"
38*2fe8fb19SBen Gras
39*2fe8fb19SBen Gras #include <sys/types.h>
40*2fe8fb19SBen Gras #include <ieeefp.h>
41*2fe8fb19SBen Gras #include <powerpc/fpu.h>
42*2fe8fb19SBen Gras
43*2fe8fb19SBen Gras #ifdef __weak_alias
__weak_alias(fpgetsticky,_fpgetsticky)44*2fe8fb19SBen Gras __weak_alias(fpgetsticky,_fpgetsticky)
45*2fe8fb19SBen Gras #endif
46*2fe8fb19SBen Gras
47*2fe8fb19SBen Gras #define STICKYBITS (FPSCR_XX|FPSCR_ZX|FPSCR_UX|FPSCR_OX|FPSCR_VX)
48*2fe8fb19SBen Gras #define STICKYSHFT 25
49*2fe8fb19SBen Gras
50*2fe8fb19SBen Gras fp_except
51*2fe8fb19SBen Gras fpgetsticky(void)
52*2fe8fb19SBen Gras {
53*2fe8fb19SBen Gras uint64_t fpscr;
54*2fe8fb19SBen Gras
55*2fe8fb19SBen Gras __asm volatile("mffs %0" : "=f"(fpscr));
56*2fe8fb19SBen Gras return (((uint32_t)fpscr & STICKYBITS) >> STICKYSHFT);
57*2fe8fb19SBen Gras }
58