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git-svn-id: svn://svn.cc65.org/cc65/trunk@3207 b7a2c559-68d2-44c3-8de9-860c34a00d81
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cuz 2004-10-03 21:25:29 +00:00
parent af19cba2d1
commit 7d72f47fe6
2 changed files with 0 additions and 282 deletions
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204
src/ca65/ea.c
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@ -1,204 +0,0 @@
/*****************************************************************************/
/* */
/* ea.c */
/* */
/* Effective address parsing for the ca65 macroassembler */
/* */
/* */
/* */
/* (C) 1998-2003 Ullrich von Bassewitz */
/* Römerstraße 52 */
/* D-70794 Filderstadt */
/* EMail: uz@cc65.org */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
/* warranty. In no event will the authors be held liable for any damages */
/* arising from the use of this software. */
/* */
/* Permission is granted to anyone to use this software for any purpose, */
/* including commercial applications, and to alter it and redistribute it */
/* freely, subject to the following restrictions: */
/* */
/* 1. The origin of this software must not be misrepresented; you must not */
/* claim that you wrote the original software. If you use this software */
/* in a product, an acknowledgment in the product documentation would be */
/* appreciated but is not required. */
/* 2. Altered source versions must be plainly marked as such, and must not */
/* be misrepresented as being the original software. */
/* 3. This notice may not be removed or altered from any source */
/* distribution. */
/* */
/*****************************************************************************/
/* ld65 */
#include "error.h"
#include "expr.h"
#include "instr.h"
#include "nexttok.h"
#include "ea.h"
/*****************************************************************************/
/* Code */
/*****************************************************************************/
void GetEA (EffAddr* A)
/* Parse an effective address, return the result in A */
{
unsigned long Restrictions;
/* Clear the output struct */
A->AddrModeSet = 0;
A->Expr = 0;
/* Handle an addressing size override */
switch (Tok) {
case TOK_OVERRIDE_ZP:
Restrictions = AM_DIR | AM_DIR_X | AM_DIR_Y;
NextTok ();
break;
case TOK_OVERRIDE_ABS:
Restrictions = AM_ABS | AM_ABS_X | AM_ABS_Y;
NextTok ();
break;
case TOK_OVERRIDE_FAR:
Restrictions = AM_ABS_LONG | AM_ABS_LONG_X;
NextTok ();
break;
default:
Restrictions = ~0UL; /* None */
break;
}
/* Parse the effective address */
if (TokIsSep (Tok)) {
A->AddrModeSet = AM_IMPLICIT;
} else if (Tok == TOK_HASH) {
/* #val */
NextTok ();
A->Expr = Expression ();
A->AddrModeSet = AM_IMM;
} else if (Tok == TOK_A) {
NextTok ();
A->AddrModeSet = AM_ACCU;
} else if (Tok == TOK_LBRACK) {
/* [dir] or [dir],y */
NextTok ();
A->Expr = Expression ();
Consume (TOK_RBRACK, "']' expected");
if (Tok == TOK_COMMA) {
/* [dir],y */
NextTok ();
Consume (TOK_Y, "`Y' expected");
A->AddrModeSet = AM_DIR_IND_LONG_Y;
} else {
/* [dir] */
A->AddrModeSet = AM_DIR_IND_LONG;
}
} else if (Tok == TOK_LPAREN) {
/* One of the indirect modes */
NextTok ();
A->Expr = Expression ();
if (Tok == TOK_COMMA) {
/* (expr,X) or (rel,S),y */
NextTok ();
if (Tok == TOK_X) {
/* (adr,x) */
NextTok ();
A->AddrModeSet = AM_ABS_X_IND | AM_DIR_X_IND;
ConsumeRParen ();
} else if (Tok == TOK_S) {
/* (rel,s),y */
NextTok ();
A->AddrModeSet = AM_STACK_REL_IND_Y;
ConsumeRParen ();
ConsumeComma ();
Consume (TOK_Y, "`Y' expected");
} else {
Error ("Syntax error");
}
} else {
/* (adr) or (adr),y */
ConsumeRParen ();
if (Tok == TOK_COMMA) {
/* (adr),y */
NextTok ();
Consume (TOK_Y, "`Y' expected");
A->AddrModeSet = AM_DIR_IND_Y;
} else {
/* (adr) */
A->AddrModeSet = AM_ABS_IND | AM_DIR_IND;
}
}
} else {
/* Remaining stuff:
*
* adr
* adr,x
* adr,y
* adr,s
*/
A->Expr = Expression ();
if (Tok == TOK_COMMA) {
NextTok ();
switch (Tok) {
case TOK_X:
A->AddrModeSet = AM_ABS_LONG_X | AM_ABS_X | AM_DIR_X;
NextTok ();
break;
case TOK_Y:
A->AddrModeSet = AM_ABS_Y | AM_DIR_Y;
NextTok ();
break;
case TOK_S:
A->AddrModeSet = AM_STACK_REL;
NextTok ();
break;
default:
Error ("Syntax error");
}
} else {
A->AddrModeSet = AM_ABS_LONG | AM_ABS | AM_DIR;
}
}
/* Apply addressing mode overrides */
A->AddrModeSet &= Restrictions;
}

78
src/ca65/ea.h
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@ -1,78 +0,0 @@
/*****************************************************************************/
/* */
/* ea.h */
/* */
/* Effective address parsing for the ca65 macroassembler */
/* */
/* */
/* */
/* (C) 1998-2003 Ullrich von Bassewitz */
/* Römerstrasse 52 */
/* D-70794 Filderstadt */
/* EMail: uz@cc65.org */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
/* warranty. In no event will the authors be held liable for any damages */
/* arising from the use of this software. */
/* */
/* Permission is granted to anyone to use this software for any purpose, */
/* including commercial applications, and to alter it and redistribute it */
/* freely, subject to the following restrictions: */
/* */
/* 1. The origin of this software must not be misrepresented; you must not */
/* claim that you wrote the original software. If you use this software */
/* in a product, an acknowledgment in the product documentation would be */
/* appreciated but is not required. */
/* 2. Altered source versions must be plainly marked as such, and must not */
/* be misrepresented as being the original software. */
/* 3. This notice may not be removed or altered from any source */
/* distribution. */
/* */
/*****************************************************************************/
#ifndef EA_H
#define EA_H
/*****************************************************************************/
/* Data */
/*****************************************************************************/
/* GetEA result struct */
typedef struct EffAddr EffAddr;
struct EffAddr {
/* First three fields get filled when calling GetEA */
unsigned long AddrModeSet; /* Possible addressing modes */
struct ExprNode* Expr; /* Expression if any (NULL otherwise) */
/* The following fields are used inside instr.c */
unsigned AddrMode; /* Actual addressing mode used */
unsigned long AddrModeBit; /* Addressing mode as bit mask */
unsigned char Opcode; /* Opcode */
};
/*****************************************************************************/
/* Code */
/*****************************************************************************/
void GetEA (EffAddr* A);
/* Parse an effective address, return the result in A */
/* End of ea.h */
#endif