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/*
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Crown Copyright (c) 1997
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This TenDRA(r) Computer Program is subject to Copyright
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owned by the United Kingdom Secretary of State for Defence
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acting through the Defence Evaluation and Research Agency
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(DERA). It is made available to Recipients with a
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royalty-free licence for its use, reproduction, transfer
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to other parties and amendment for any purpose not excluding
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product development provided that any such use et cetera
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shall be deemed to be acceptance of the following conditions:-
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(1) Its Recipients shall ensure that this Notice is
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reproduced upon any copies or amended versions of it;
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(2) Any amended version of it shall be clearly marked to
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show both the nature of and the organisation responsible
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for the relevant amendment or amendments;
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(3) Its onward transfer from a recipient to another
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party shall be deemed to be that party's acceptance of
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these conditions;
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(4) DERA gives no warranty or assurance as to its
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quality or suitability for any purpose and DERA accepts
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no liability whatsoever in relation to any use to which
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it may be put.
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*/
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/**********************************************************************
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$Author: release $
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$Date: 1998/01/17 15:56:05 $
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$Revision: 1.1.1.1 $
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$Log: addrtypes.h,v $
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* Revision 1.1.1.1 1998/01/17 15:56:05 release
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* First version to be checked into rolling release.
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*
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* Revision 1.1 1995/08/16 15:38:39 currie
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* Initial revision
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*
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* Revision 1.1 1995/04/13 09:08:06 currie
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* Initial revision
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*
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* Revision 1.1 1995/04/13 09:08:06 currie
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* Initial revision
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*
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***********************************************************************/
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/*****************************************************************
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addressingtypes.h
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Types for usable addressing modes are defined here :-
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baseoff, instore, freg, ans, where
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*****************************************************************/
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#ifndef addressingtkey
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#define addressingtkey 1
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#include "common_types.h"
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struct makeansst {
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int lab;
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int regmove;
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};
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typedef struct makeansst makeans;
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#define NOREG 100
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struct baseofft {
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int base; /* base register for addressing */
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long offset; /* offset in words */
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};
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typedef struct baseofft baseoff;
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struct instoret {
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baseoff b;
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bool adval; /* if true then b is itself an address
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value i.e not a pointer to a value */
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};
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typedef struct instoret instore;
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struct fregt {
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int fr; /* floating point reg (actually fr*2) */
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bool dble; /* double precision */
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};
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typedef struct fregt freg;
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struct somefregt {
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int *fr;
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bool dble;
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};
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typedef struct somefregt somefreg;
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struct someregt {
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int *r;
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}; /* extra struct is to get over bug in MIPS
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cc */
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typedef struct someregt somereg;
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union anstu {
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int regans; /* register number */
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freg fregans;
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instore instoreans;
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somefreg somefregans;
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somereg someregans;
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};
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enum ansdiscrim {
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inreg, infreg, notinreg, insomereg, insomefreg
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};
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/* use to discriminate the above union type */
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struct anst {
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enum ansdiscrim discrim;
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union anstu val;
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};
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typedef struct anst ans; /* this type used as union of a fixpnt
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reg,
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a float reg and an instore value */
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struct wheret {
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ans answhere; /* reg or store position */
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ash ashwhere; /* size and alignment, see ashtypes.h */
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};
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typedef struct wheret where;
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struct mmt {
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long maxi;
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long mini;
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char *fmt;
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};
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typedef struct mmt mm;
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/******************************************************************
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macros for ease of use of unions, allow 'hiding' of discriminator.
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******************************************************************/
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#define regalt(x) (x).val.regans
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#define fregalt(x) (x).val.fregans
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#define insalt(x) (x).val.instoreans
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#define someregalt(x) (x).val.someregans.r;
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#define somefregalt(x) (x).val.somefregans;
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/* assign to field of union, discriminator set as appropriate */
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#define setregalt(x,y) (x).discrim = inreg; (x).val.regans = y
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#define setfregalt(x,y) (x).discrim = infreg; (x).val.fregans = y
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#define setinsalt(x,y) (x).discrim = notinreg; (x).val.instoreans =y
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#define setsomeregalt(x,y) (x).discrim = insomereg; (x).val.someregans.r =y
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#define setsomefregalt(x,y) (x).discrim = insomefreg; (x).val.somefregans=y
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#endif
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