89 lines
3.8 KiB
PHP
89 lines
3.8 KiB
PHP
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;*****************************************************************************
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;*
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;* Open Watcom Project
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;*
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;* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
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;*
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;* ========================================================================
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;*
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;* This file contains Original Code and/or Modifications of Original
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;* Code as defined in and that are subject to the Sybase Open Watcom
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;* Public License version 1.0 (the 'License'). You may not use this file
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;* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
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;* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
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;* provided with the Original Code and Modifications, and is also
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;* available at www.sybase.com/developer/opensource.
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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 SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
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;* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
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;* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
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;* NON-INFRINGEMENT. Please see the License for the specific language
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;* governing rights and limitations under the License.
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;*
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;* ========================================================================
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;*
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;* Description: WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
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;* DESCRIBE IT HERE!
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;*
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;*****************************************************************************
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; Define 8087 status word:
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; ========================
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ST_EF_IO equ 0001h ; invalid operation
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ST_EF_DO equ 0002h ; denormalized operand
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ST_EF_ZD equ 0004h ; zero divide
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ST_EF_OF equ 0008h ; overflow flag
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ST_EF_UF equ 0010h ; underflow flag
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ST_EF_PR equ 0020h ; precision
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ST_EF_SF equ 0040h ; stack under/overflow
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ST_EF_ES equ 0080h ; error summary
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ST_C0 equ 0100h ; condition code 0
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ST_C1 equ 0200h ; condition code 1
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ST_C2 equ 0400h ; condition code 2
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ST_C3 equ 4000h ; condition code 3
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ST_IR equ 0080h ; interrupt request
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ST_ST equ 3800h ; stack top
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ST_BF equ 8000h ; busy flag
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; Define 8087 control word:
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; =========================
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; Exception masks (1 = exception masked)
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CW_IM equ 0001h ; invalid operation
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CW_DM equ 0002h ; denormalized operand
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CW_ZM equ 0004h ; zero divide
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CW_OM equ 0008h ; overflow
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CW_UM equ 0010h ; underflow
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CW_PM equ 0020h ; precision
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; reserved - xxx0 0000 0x00 0000
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CW_RESERVE equ 0e040h ; RESERVED
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; interrupt enable mask 0000 0000 x000 0000
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CW_IEM_EN equ 0000h ; enabled
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CW_IEM_DIS equ 0080h ; disabled
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CW_PC_MASK equ 0fcffh ; precision control - 0000 00xx 0000 0000
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CW_PC_64 equ 0300h ; precision control - 64 bits
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CW_PC_53 equ 0200h ; precision control - 53 bits
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CW_PC_RES equ 0100h ; precision control - reserved
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CW_PC_24 equ 0000h ; precision control - 24 bits
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CW_RC_MASK equ 0f3ffh ; round control - 0000 xx00 0000 0000
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CW_RC_CHOP equ 0c00h ; round control - chop
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CW_RC_UP equ 0800h ; round control - round up
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CW_RC_DOWN equ 0400h ; round control - round down
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CW_RC_NEAR equ 0000h ; round control - round nearest
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; infinity control - 000x 0000 0000 0000
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CW_IC_PROJ equ 0000h ; projective
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CW_IC_AFF equ 1000h ; affine
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