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1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /*
23: * @OSF_COPYRIGHT@
24: */
25: /*
26: * HISTORY
27: *
28: * Revision 1.1.1.1 1998/09/22 21:05:31 wsanchez
29: * Import of Mac OS X kernel (~semeria)
30: *
31: * Revision 1.1.1.1 1998/03/07 02:25:47 wsanchez
32: * Import of OSF Mach kernel (~mburg)
33: *
34: * Revision 1.2.6.1 1994/09/23 02:37:03 ezf
35: * change marker to not FREE
36: * [1994/09/22 21:39:57 ezf]
37: *
38: * Revision 1.2.2.2 1993/06/09 02:40:30 gm
39: * Added to OSF/1 R1.3 from NMK15.0.
40: * [1993/06/02 21:16:11 jeffc]
41: *
42: * Revision 1.2 1993/04/19 16:33:51 devrcs
43: * ansi C conformance changes
44: * [1993/02/02 18:56:01 david]
45: *
46: * Revision 1.1 1992/09/30 02:30:43 robert
47: * Initial revision
48: *
49: * $EndLog$
50: */
51: /* CMU_HIST */
52: /*
53: * Revision 2.1.1.1.2.1 92/03/03 16:21:23 jeffreyh
54: * Merged up to Trunk
55: * [92/02/26 jeffreyh]
56: *
57: * Revision 2.4 92/02/26 13:10:29 elf
58: * Added stupid alaises to make i386/fpu.c compile. RVB will fix.
59: *
60: * [92/02/26 elf]
61: *
62: * Revision 2.3 92/02/26 12:47:46 elf
63: * Installed from i386 directory.
64: * [92/02/26 danner]
65: *
66: *
67: * Revision 2.2 92/01/03 20:19:47 dbg
68: * Move this file to mach/i386. Add FP_NO..FP_387 codes for
69: * floating-point processor status. Error bits in control
70: * register are masks, not enables.
71: * [91/10/19 dbg]
72: *
73: */
74: /* CMU_ENDHIST */
75: /*
76: * Mach Operating System
77: * Copyright (c) 1992-1989 Carnegie Mellon University
78: * All Rights Reserved.
79: *
80: * Permission to use, copy, modify and distribute this software and its
81: * documentation is hereby granted, provided that both the copyright
82: * notice and this permission notice appear in all copies of the
83: * software, derivative works or modified versions, and any portions
84: * thereof, and that both notices appear in supporting documentation.
85: *
86: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
87: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
88: * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
89: *
90: * Carnegie Mellon requests users of this software to return to
91: *
92: * Software Distribution Coordinator or [email protected]
93: * School of Computer Science
94: * Carnegie Mellon University
95: * Pittsburgh PA 15213-3890
96: *
97: * any improvements or extensions that they make and grant Carnegie Mellon
98: * the rights to redistribute these changes.
99: */
100: /*
101: */
102:
103: #ifndef _I386_FP_SAVE_H_
104: #define _I386_FP_SAVE_H_
105: /*
106: * Floating point registers and status, as saved
107: * and restored by FP save/restore instructions.
108: */
109: struct i386_fp_save {
110: unsigned short fp_control; /* control */
111: unsigned short fp_unused_1;
112: unsigned short fp_status; /* status */
113: unsigned short fp_unused_2;
114: unsigned short fp_tag; /* register tags */
115: unsigned short fp_unused_3;
116: unsigned int fp_eip; /* eip at failed instruction */
117: unsigned short fp_cs; /* cs at failed instruction */
118: unsigned short fp_opcode; /* opcode of failed instruction */
119: unsigned int fp_dp; /* data address */
120: unsigned short fp_ds; /* data segment */
121: unsigned short fp_unused_4;
122: };
123:
124: struct i386_fp_regs {
125: unsigned short fp_reg_word[5][8];
126: /* space for 8 80-bit FP registers */
127: };
128:
129: /*
130: * Control register
131: */
132: #define FPC_IE 0x0001 /* enable invalid operation
133: exception */
134: #define FPC_IM FPC_IE
135: #define FPC_DE 0x0002 /* enable denormalized operation
136: exception */
137: #define FPC_DM FPC_DE
138: #define FPC_ZE 0x0004 /* enable zero-divide exception */
139: #define FPC_ZM FPC_ZE
140: #define FPC_OE 0x0008 /* enable overflow exception */
141: #define FPC_OM FPC_OE
142: #define FPC_UE 0x0010 /* enable underflow exception */
143: #define FPC_PE 0x0020 /* enable precision exception */
144: #define FPC_PC 0x0300 /* precision control: */
145: #define FPC_PC_24 0x0000 /* 24 bits */
146: #define FPC_PC_53 0x0200 /* 53 bits */
147: #define FPC_PC_64 0x0300 /* 64 bits */
148: #define FPC_RC 0x0c00 /* rounding control: */
149: #define FPC_RC_RN 0x0000 /* round to nearest or even */
150: #define FPC_RC_RD 0x0400 /* round down */
151: #define FPC_RC_RU 0x0800 /* round up */
152: #define FPC_RC_CHOP 0x0c00 /* chop */
153: #define FPC_IC 0x1000 /* infinity control (obsolete) */
154: #define FPC_IC_PROJ 0x0000 /* projective infinity */
155: #define FPC_IC_AFF 0x1000 /* affine infinity (std) */
156:
157: /*
158: * Status register
159: */
160: #define FPS_IE 0x0001 /* invalid operation */
161: #define FPS_DE 0x0002 /* denormalized operand */
162: #define FPS_ZE 0x0004 /* divide by zero */
163: #define FPS_OE 0x0008 /* overflow */
164: #define FPS_UE 0x0010 /* underflow */
165: #define FPS_PE 0x0020 /* precision */
166: #define FPS_SF 0x0040 /* stack flag */
167: #define FPS_ES 0x0080 /* error summary */
168: #define FPS_C0 0x0100 /* condition code bit 0 */
169: #define FPS_C1 0x0200 /* condition code bit 1 */
170: #define FPS_C2 0x0400 /* condition code bit 2 */
171: #define FPS_TOS 0x3800 /* top-of-stack pointer */
172: #define FPS_TOS_SHIFT 11
173: #define FPS_C3 0x4000 /* condition code bit 3 */
174: #define FPS_BUSY 0x8000 /* FPU busy */
175:
176: /*
177: * Kind of floating-point support provided by kernel.
178: */
179: #define FP_NO 0 /* no floating point */
180: #define FP_SOFT 1 /* software FP emulator */
181: #define FP_287 2 /* 80287 */
182: #define FP_387 3 /* 80387 or 80486 */
183:
184: #endif /* _I386_FP_SAVE_H_ */
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