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/*

 * Copyright (c) 2002-2005 The TenDRA Project <http://www.tendra.org/>.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

 *

 * 1. Redistributions of source code must retain the above copyright notice,

 *    this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright notice,

 *    this list of conditions and the following disclaimer in the documentation

 *    and/or other materials provided with the distribution.

 * 3. Neither the name of The TenDRA Project nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific, prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS

 * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;

 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,

 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR

 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF

 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 *

 * $Id$

 */

/*

    		 Crown Copyright (c) 1996

    This TenDRA(r) Computer Program is subject to Copyright

    owned by the United Kingdom Secretary of State for Defence

    acting through the Defence Evaluation and Research Agency

    (DERA).  It is made available to Recipients with a

    royalty-free licence for its use, reproduction, transfer

    to other parties and amendment for any purpose not excluding

    product development provided that any such use et cetera

    shall be deemed to be acceptance of the following conditions:-

        (1) Its Recipients shall ensure that this Notice is

        reproduced upon any copies or amended versions of it;

        (2) Any amended version of it shall be clearly marked to

        show both the nature of and the organisation responsible

        for the relevant amendment or amendments;

        (3) Its onward transfer from a recipient to another

        party shall be deemed to be that party's acceptance of

        these conditions;

        (4) DERA gives no warranty or assurance as to its

        quality or suitability for any purpose and DERA accepts

        no liability whatsoever in relation to any use to which

        it may be put.

*/

/*

			    VERSION INFORMATION

			    ===================

--------------------------------------------------------------------------

$Header: /u/g/release/CVSROOT/Source/src/installers/680x0/common/where.h,v 1.1.1.1 1998/01/17 15:55:50 release Exp $

--------------------------------------------------------------------------

$Log: where.h,v $

 * Revision 1.1.1.1  1998/01/17  15:55:50  release

 * First version to be checked into rolling release.

 *

Revision 1.2  1997/10/29 10:22:33  ma

Replaced use_alloca with has_alloca.

Revision 1.1.1.1  1997/10/13 12:43:01  ma

First version.

Revision 1.3  1997/10/13 08:50:22  ma

Made all pl_tests for general proc & exception handling pass.

Revision 1.2  1997/09/25 06:45:43  ma

All general_proc tests passed

Revision 1.1.1.1  1997/03/14 07:50:21  ma

Imported from DRA

 * Revision 1.1.1.1  1996/09/20  10:57:00  john

 *

 * Revision 1.2  1996/07/05  14:30:26  john

 * Changes for spec 3.1

 *

 * Revision 1.1.1.1  1996/03/26  15:45:19  john

 *

 * Revision 1.2  94/02/21  16:07:24  16:07:24  ra (Robert Andrews)

 * Declare functions with no arguments with ( void ).  Make 0 into a long

 * in the definition of zw.

 *

 * Revision 1.1  93/02/22  17:17:07  17:17:07  ra (Robert Andrews)

 * Initial revision

 *

--------------------------------------------------------------------------

*/

#ifndef WHERE_INCLUDED

#define WHERE_INCLUDED

/*

    STRUCTURE REPRESENTING ALLOCATED EXPRESSIONS

    A where consists of an expression, wh_exp, and an offset wh_off.

    The wh_is field gives information on where the expression is

    stored (see below).  The wh_regs field gives the register mask

    of all the registers involved in storing the expression.

*/

typedef struct {

    exp wh_exp;

    long wh_off;

    int wh_is;

    bitpattern wh_regs;

} where;

/*

    POSSIBLE VALUES FOR THE wh_is FIELD OF A WHERE

*/

#define  Dreg		0	/* In a D-register */

#define  Areg		1	/* In an A-register */

#define  Freg		2	/* In an F-register */

#define  Value		3	/* Constant value */

#define  Parameter	4	/* On the stack (procedure argument) */

#define  Variable	5	/* On the stack (allocated variable) */

#define  RegInd		6	/* Indirect relative to a register */

#define  EffAddr	7	/* In a valid 68020 effective address */

#define  External	8	/* External data */

#define  RegPair	9	/* In a register pair */

#define  Other		10	/* All other cases */

/*

    PROCEDURES INVOLVING WHERE'S

*/

extern void init_wheres(void);

extern int shtype(shape);

extern where mw(exp, long);

extern where mnw(long);

extern bool eq_where_a(where, where, int);

extern where where_operand(mach_op*);

/*

    MACROS INVOLVING WHERE'S

*/

#define  whereis(X)		((X).wh_is)

#define  interfere(X, Y)	((X).wh_regs & (Y).wh_regs)

#define  last_use(X)		((X).wh_regs & reuseables)

#define  nw(X)		(no((X).wh_exp) + (X).wh_off)

#define  zw(X)		mw(X, L0)

#define  eq_where(X, Y)	eq_where_a(X, Y, 1)

/*

    CONSTANT EXP'S AND WHERE'S

*/

extern exp zeroe;

extern where zero, fzero;

extern where A6_4, A0_p, A1_p, SP_p, A6_4_p, D0_D1;

extern where RW[];

extern where dummy_double_dest ; /* used to force floating-point overflow */

extern where firstlocal ; /* represents first local on the stack */

/*

    DEFINITION OF REGISTER WHERE'S

*/

#define  D0		(RW[REG_D0])

#define  D1		(RW[REG_D1])

#define  D2		(RW[REG_D2])

#define  D3		(RW[REG_D3])

#define  D4		(RW[REG_D4])

#define  D5		(RW[REG_D5])

#define  D6		(RW[REG_D6])

#define  D7		(RW[REG_D7])

#define  A0		(RW[REG_A0])

#define  A1		(RW[REG_A1])

#define  A2		(RW[REG_A2])

#define  A3		(RW[REG_A3])

#define  A4		(RW[REG_A4])

#define  A5		(RW[REG_A5])

#define  AP		(RW[REG_AP])

#define  SP		(RW[REG_SP])

#define  FP0		(RW[REG_FP0])

#define  FP1		(RW[REG_FP1])

#define  FP2		(RW[REG_FP2])

#define  FP3		(RW[REG_FP3])

#define  FP4		(RW[REG_FP4])

#define  FP5		(RW[REG_FP5])

#define  FP6		(RW[REG_FP6])

#define  FP7		(RW[REG_FP7])

#define  register(X)	(RW[(X)])

#endif