kolibrios/programs/develop/open watcom/trunk/clib/h/stword.inc

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