www.pudn.com > open_watcom.rar > register.h

/**************************************************************************** 
* 
*                            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! 
* 
****************************************************************************/ 
 
 
typedef uint_16 reg; 
 
typedef enum { 
#define PICK( a, b )    RC_##a, 
#include "regclass.inc" 
#undef PICK 
    RC_LAST 
} reg_class; 
 
#define MakeReg( c, i ) ( ( (i) & 0xff ) | ( (int)(c) << 8 ) ) 
#define RegClass( r )   ( ( (r) >> 8 ) & 0xff ) 
#define RegIndex( r )   ( (r) & 0xff ) 
 
#define NULL_REG        ( MakeReg( RC_NOTHING, 0 ) ) 
 
// $28 is the assembler temp reg in Alpha 
#define AT_REG          ( MakeReg( RC_GPR, 28 ) ) 
 
extern char *AsRegName( reg ); 
 
#define RegName         AsRegName