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- /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
- /*
- * @OSF_COPYRIGHT@
- */
- /*
- * HISTORY
- *
- * Revision 1.1.1.1 1998/09/22 21:05:31 wsanchez
- * Import of Mac OS X kernel (~semeria)
- *
- * Revision 1.1.1.1 1998/03/07 02:25:47 wsanchez
- * Import of OSF Mach kernel (~mburg)
- *
- * Revision 1.2.6.1 1994/09/23 02:37:03 ezf
- * change marker to not FREE
- * [1994/09/22 21:39:57 ezf]
- *
- * Revision 1.2.2.2 1993/06/09 02:40:30 gm
- * Added to OSF/1 R1.3 from NMK15.0.
- * [1993/06/02 21:16:11 jeffc]
- *
- * Revision 1.2 1993/04/19 16:33:51 devrcs
- * ansi C conformance changes
- * [1993/02/02 18:56:01 david]
- *
- * Revision 1.1 1992/09/30 02:30:43 robert
- * Initial revision
- *
- * $EndLog$
- */
- /* CMU_HIST */
- /*
- * Revision 2.1.1.1.2.1 92/03/03 16:21:23 jeffreyh
- * Merged up to Trunk
- * [92/02/26 jeffreyh]
- *
- * Revision 2.4 92/02/26 13:10:29 elf
- * Added stupid alaises to make i386/fpu.c compile. RVB will fix.
- *
- * [92/02/26 elf]
- *
- * Revision 2.3 92/02/26 12:47:46 elf
- * Installed from i386 directory.
- * [92/02/26 danner]
- *
- *
- * Revision 2.2 92/01/03 20:19:47 dbg
- * Move this file to mach/i386. Add FP_NO..FP_387 codes for
- * floating-point processor status. Error bits in control
- * register are masks, not enables.
- * [91/10/19 dbg]
- *
- */
- /* CMU_ENDHIST */
- /*
- * Mach Operating System
- * Copyright (c) 1992-1989 Carnegie Mellon University
- * All Rights Reserved.
- *
- * Permission to use, copy, modify and distribute this software and its
- * documentation is hereby granted, provided that both the copyright
- * notice and this permission notice appear in all copies of the
- * software, derivative works or modified versions, and any portions
- * thereof, and that both notices appear in supporting documentation.
- *
- * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
- * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
- * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
- *
- * Carnegie Mellon requests users of this software to return to
- *
- * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
- * School of Computer Science
- * Carnegie Mellon University
- * Pittsburgh PA 15213-3890
- *
- * any improvements or extensions that they make and grant Carnegie Mellon
- * the rights to redistribute these changes.
- */
- /*
- */
-
- #ifndef _I386_FP_SAVE_H_
- #define _I386_FP_SAVE_H_
- /*
- * Floating point registers and status, as saved
- * and restored by FP save/restore instructions.
- */
- struct i386_fp_save {
- unsigned short fp_control; /* control */
- unsigned short fp_unused_1;
- unsigned short fp_status; /* status */
- unsigned short fp_unused_2;
- unsigned short fp_tag; /* register tags */
- unsigned short fp_unused_3;
- unsigned int fp_eip; /* eip at failed instruction */
- unsigned short fp_cs; /* cs at failed instruction */
- unsigned short fp_opcode; /* opcode of failed instruction */
- unsigned int fp_dp; /* data address */
- unsigned short fp_ds; /* data segment */
- unsigned short fp_unused_4;
- };
-
- struct i386_fp_regs {
- unsigned short fp_reg_word[5][8];
- /* space for 8 80-bit FP registers */
- };
-
- /*
- * Control register
- */
- #define FPC_IE 0x0001 /* enable invalid operation
- exception */
- #define FPC_IM FPC_IE
- #define FPC_DE 0x0002 /* enable denormalized operation
- exception */
- #define FPC_DM FPC_DE
- #define FPC_ZE 0x0004 /* enable zero-divide exception */
- #define FPC_ZM FPC_ZE
- #define FPC_OE 0x0008 /* enable overflow exception */
- #define FPC_OM FPC_OE
- #define FPC_UE 0x0010 /* enable underflow exception */
- #define FPC_PE 0x0020 /* enable precision exception */
- #define FPC_PC 0x0300 /* precision control: */
- #define FPC_PC_24 0x0000 /* 24 bits */
- #define FPC_PC_53 0x0200 /* 53 bits */
- #define FPC_PC_64 0x0300 /* 64 bits */
- #define FPC_RC 0x0c00 /* rounding control: */
- #define FPC_RC_RN 0x0000 /* round to nearest or even */
- #define FPC_RC_RD 0x0400 /* round down */
- #define FPC_RC_RU 0x0800 /* round up */
- #define FPC_RC_CHOP 0x0c00 /* chop */
- #define FPC_IC 0x1000 /* infinity control (obsolete) */
- #define FPC_IC_PROJ 0x0000 /* projective infinity */
- #define FPC_IC_AFF 0x1000 /* affine infinity (std) */
-
- /*
- * Status register
- */
- #define FPS_IE 0x0001 /* invalid operation */
- #define FPS_DE 0x0002 /* denormalized operand */
- #define FPS_ZE 0x0004 /* divide by zero */
- #define FPS_OE 0x0008 /* overflow */
- #define FPS_UE 0x0010 /* underflow */
- #define FPS_PE 0x0020 /* precision */
- #define FPS_SF 0x0040 /* stack flag */
- #define FPS_ES 0x0080 /* error summary */
- #define FPS_C0 0x0100 /* condition code bit 0 */
- #define FPS_C1 0x0200 /* condition code bit 1 */
- #define FPS_C2 0x0400 /* condition code bit 2 */
- #define FPS_TOS 0x3800 /* top-of-stack pointer */
- #define FPS_TOS_SHIFT 11
- #define FPS_C3 0x4000 /* condition code bit 3 */
- #define FPS_BUSY 0x8000 /* FPU busy */
-
- /*
- * Kind of floating-point support provided by kernel.
- */
- #define FP_NO 0 /* no floating point */
- #define FP_SOFT 1 /* software FP emulator */
- #define FP_287 2 /* 80287 */
- #define FP_387 3 /* 80387 or 80486 */
-
- #endif /* _I386_FP_SAVE_H_ */
-