fp.h revision 239268 
1/*	$NetBSD: fp.h,v 1.1 2001/01/10 19:02:06 bjh21 Exp $	*/
2
3/*-
4 * Copyright (c) 1995 Mark Brinicombe.
5 * Copyright (c) 1995 Brini.
6 * All rights reserved.
7 *
8 * This code is derived from software written for Brini by Mark Brinicombe
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *	This product includes software developed by Brini.
21 * 4. The name of the company nor the name of the author may be used to
22 *    endorse or promote products derived from this software without specific
23 *    prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
29 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
30 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
31 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * RiscBSD kernel project
38 *
39 * fp.h
40 *
41 * FP info
42 *
43 * Created      : 10/10/95
44 *
45 * $FreeBSD: head/sys/arm/include/fp.h 239268 2012-08-15 03:03:03Z gonzo $
46 */
47
48#ifndef _MACHINE_FP_H
49#define _MACHINE_FP_H
50
51/*
52 * An extended precision floating point number
53 */
54
55typedef struct fp_extended_precision {
56	u_int32_t fp_exponent;
57	u_int32_t fp_mantissa_hi;
58	u_int32_t fp_mantissa_lo;
59} fp_extended_precision_t;
60
61typedef struct fp_extended_precision fp_reg_t;
62
63/*
64 * Information about the FPE-SP state that is stored in the pcb
65 *
66 * This needs to move and be hidden from userland.
67 */
68
69#ifdef ARM_VFP_SUPPORT
70struct vfp_state {
71	u_int64_t reg[32];
72	u_int32_t fpscr;
73};
74#else
75struct fpe_sp_state {
76	unsigned int fp_flags;
77	unsigned int fp_sr;
78	unsigned int fp_cr;
79	fp_reg_t fp_registers[16];
80};
81#endif
82
83/*
84 * Type for a saved FP context, if we want to translate the context to a
85 * user-readable form
86 */
87
88typedef struct {
89	u_int32_t fpsr;
90	fp_extended_precision_t regs[8];
91} fp_state_t;
92
93#endif /* _MACHINE_FP_H_ */
94
95/* End of fp.h */
96