fp.h revision 86530 
1/*-
2 * Copyright 2001 by Thomas Moestl <tmm@FreeBSD.org>.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
17 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
19 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
20 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
21 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
22 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 *
24 * $FreeBSD: head/sys/sparc64/include/fp.h 86530 2001-11-18 04:00:22Z jake $
25 */
26
27#ifndef	_MACHINE_FP_H_
28#define	_MACHINE_FP_H_
29
30/* A block of 8 double-precision (16 single-precision) FP registers. */
31struct fpblock {
32	u_long	fpq_l[8];
33};
34
35struct fpstate {
36	struct	fpblock fp_fb[4];
37	u_long	fp_fsr;
38	u_long	fp_fprs;
39};
40
41#ifdef _KERNEL
42
43struct pcb;
44struct thread;
45
46void	fp_init_thread(struct pcb *);
47int	fp_enable_thread(struct thread *, struct trapframe *);
48int	fp_exception_other(struct thread *, struct trapframe *);
49/*
50 * Note: The pointers passed to the next two functions must be aligned on
51 * 64 byte boundaries.
52 */
53void	savefpctx(struct fpstate *);
54void	restorefpctx(struct fpstate *);
55
56#endif /* _KERNEL */
57#endif /* !_MACHINE_FP_H_ */
58