123 lines
5.2 KiB
C
123 lines
5.2 KiB
C
/*
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* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/*
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* @OSF_COPYRIGHT@
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*/
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/*
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* Mach Operating System
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* Copyright (c) 1992-1989 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie Mellon
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* the rights to redistribute these changes.
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*/
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/*
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*/
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#ifndef _I386_FP_SAVE_H_
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#define _I386_FP_SAVE_H_
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#if defined (__i386__) || defined (__x86_64__)
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/*
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* Control register
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*/
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#define FPC_IE 0x0001 /* enable invalid operation
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* exception */
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#define FPC_IM FPC_IE
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#define FPC_DE 0x0002 /* enable denormalized operation
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* exception */
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#define FPC_DM FPC_DE
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#define FPC_ZE 0x0004 /* enable zero-divide exception */
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#define FPC_ZM FPC_ZE
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#define FPC_OE 0x0008 /* enable overflow exception */
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#define FPC_OM FPC_OE
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#define FPC_UE 0x0010 /* enable underflow exception */
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#define FPC_PE 0x0020 /* enable precision exception */
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#define FPC_PC 0x0300 /* precision control: */
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#define FPC_PC_24 0x0000 /* 24 bits */
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#define FPC_PC_53 0x0200 /* 53 bits */
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#define FPC_PC_64 0x0300 /* 64 bits */
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#define FPC_RC 0x0c00 /* rounding control: */
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#define FPC_RC_RN 0x0000 /* round to nearest or even */
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#define FPC_RC_RD 0x0400 /* round down */
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#define FPC_RC_RU 0x0800 /* round up */
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#define FPC_RC_CHOP 0x0c00 /* chop */
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#define FPC_IC 0x1000 /* infinity control (obsolete) */
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#define FPC_IC_PROJ 0x0000 /* projective infinity */
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#define FPC_IC_AFF 0x1000 /* affine infinity (std) */
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/*
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* Status register
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*/
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#define FPS_IE 0x0001 /* invalid operation */
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#define FPS_DE 0x0002 /* denormalized operand */
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#define FPS_ZE 0x0004 /* divide by zero */
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#define FPS_OE 0x0008 /* overflow */
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#define FPS_UE 0x0010 /* underflow */
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#define FPS_PE 0x0020 /* precision */
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#define FPS_SF 0x0040 /* stack flag */
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#define FPS_ES 0x0080 /* error summary */
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#define FPS_C0 0x0100 /* condition code bit 0 */
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#define FPS_C1 0x0200 /* condition code bit 1 */
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#define FPS_C2 0x0400 /* condition code bit 2 */
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#define FPS_TOS 0x3800 /* top-of-stack pointer */
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#define FPS_TOS_SHIFT 11
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#define FPS_C3 0x4000 /* condition code bit 3 */
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#define FPS_BUSY 0x8000 /* FPU busy */
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/*
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* Kind of floating-point support provided by kernel.
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*/
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#define FP_NO 0 /* no floating point */
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#define FP_SOFT 1 /* software FP emulator */
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#define FP_287 2 /* 80287 */
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#define FP_387 3 /* 80387 or 80486 */
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#define FP_FXSR 4 /* Fast save/restore SIMD Extension */
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#endif /* defined (__i386__) || defined (__x86_64__) */
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#endif /* _I386_FP_SAVE_H_ */
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