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1/*
2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28/*
29 * @OSF_COPYRIGHT@
30 */
31/*
32 * Mach Operating System
33 * Copyright (c) 1992-1989 Carnegie Mellon University
34 * All Rights Reserved.
35 *
36 * Permission to use, copy, modify and distribute this software and its
37 * documentation is hereby granted, provided that both the copyright
38 * notice and this permission notice appear in all copies of the
39 * software, derivative works or modified versions, and any portions
40 * thereof, and that both notices appear in supporting documentation.
41 *
42 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
43 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
44 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
45 *
46 * Carnegie Mellon requests users of this software to return to
47 *
48 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
49 * School of Computer Science
50 * Carnegie Mellon University
51 * Pittsburgh PA 15213-3890
52 *
53 * any improvements or extensions that they make and grant Carnegie Mellon
54 * the rights to redistribute these changes.
55 */
56/*
57 */
58
59#ifndef _I386_FP_SAVE_H_
60#define _I386_FP_SAVE_H_
61
62#if defined (__i386__) || defined (__x86_64__)
63
64/*
65 * Control register
66 */
67#define FPC_IE 0x0001 /* enable invalid operation
68 * exception */
69#define FPC_IM FPC_IE
70#define FPC_DE 0x0002 /* enable denormalized operation
71 * exception */
72#define FPC_DM FPC_DE
73#define FPC_ZE 0x0004 /* enable zero-divide exception */
74#define FPC_ZM FPC_ZE
75#define FPC_OE 0x0008 /* enable overflow exception */
76#define FPC_OM FPC_OE
77#define FPC_UE 0x0010 /* enable underflow exception */
78#define FPC_PE 0x0020 /* enable precision exception */
79#define FPC_PC 0x0300 /* precision control: */
80#define FPC_PC_24 0x0000 /* 24 bits */
81#define FPC_PC_53 0x0200 /* 53 bits */
82#define FPC_PC_64 0x0300 /* 64 bits */
83#define FPC_RC 0x0c00 /* rounding control: */
84#define FPC_RC_RN 0x0000 /* round to nearest or even */
85#define FPC_RC_RD 0x0400 /* round down */
86#define FPC_RC_RU 0x0800 /* round up */
87#define FPC_RC_CHOP 0x0c00 /* chop */
88#define FPC_IC 0x1000 /* infinity control (obsolete) */
89#define FPC_IC_PROJ 0x0000 /* projective infinity */
90#define FPC_IC_AFF 0x1000 /* affine infinity (std) */
91
92/*
93 * Status register
94 */
95#define FPS_IE 0x0001 /* invalid operation */
96#define FPS_DE 0x0002 /* denormalized operand */
97#define FPS_ZE 0x0004 /* divide by zero */
98#define FPS_OE 0x0008 /* overflow */
99#define FPS_UE 0x0010 /* underflow */
100#define FPS_PE 0x0020 /* precision */
101#define FPS_SF 0x0040 /* stack flag */
102#define FPS_ES 0x0080 /* error summary */
103#define FPS_C0 0x0100 /* condition code bit 0 */
104#define FPS_C1 0x0200 /* condition code bit 1 */
105#define FPS_C2 0x0400 /* condition code bit 2 */
106#define FPS_TOS 0x3800 /* top-of-stack pointer */
107#define FPS_TOS_SHIFT 11
108#define FPS_C3 0x4000 /* condition code bit 3 */
109#define FPS_BUSY 0x8000 /* FPU busy */
110
111/*
112 * Kind of floating-point support provided by kernel.
113 */
114#define FP_NO 0 /* no floating point */
115#define FP_SOFT 1 /* software FP emulator */
116#define FP_287 2 /* 80287 */
117#define FP_387 3 /* 80387 or 80486 */
118#define FP_FXSR 4 /* Fast save/restore SIMD Extension */
119
120#endif /* defined (__i386__) || defined (__x86_64__) */
121
122#endif /* _I386_FP_SAVE_H_ */