/* * 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_ */