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macross/operandStuffSD_6502.c
Peter De Wachter deb5d06fba Remove obsolete kludge
2016-01-23 21:21:31 +01:00

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/*
* Copyright (c) 1987 Fujitsu
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/*
operandStuff_6502.c -- Various target processor routines to handle
operands in the Macross assembler (6502 version).
Chip Morningstar -- Lucasfilm Ltd.
23-April-1985
*/
#include "macrossTypes.h"
#include "macrossGlobals.h"
/* corresponds to routines in buildStuff2.c */
extern void botch (char *message, ...);
extern void error (errorType theError, ...);
extern void freeExpression (expressionType *expression);
extern void freeSelectionList (selectionListType *selectionList);
extern void freeString (stringType *string);
extern void freeBlock (blockType *block);
extern void moreText (char *format, ...);
extern void expandExpression (char *toBuffer, char **toBufferPtr);
extern void assembleBlock (blockType *block);
operandType *
buildOperand(operandKindType kindOfOperand, anyOldThing *arg)
{
operandType *result;
result = typeAlloc(operandType);
result->kindOfOperand = kindOfOperand;
result->nextOperand = NULL;
switch (kindOfOperand) {
case EXPRESSION_OPND:
result->theOperand.expressionUnion =
(expressionOperandBodyType *) arg;
break;
case IMMEDIATE_OPND:
result->theOperand.immediateUnion =
(immediateOperandBodyType *) arg;
break;
case INDIRECT_OPND:
result->theOperand.indirectUnion =
(indirectOperandBodyType *) arg;
break;
case A_REGISTER_OPND:
result->theOperand.aRegisterUnion =
(aRegisterOperandBodyType *) NULL;
break;
case X_REGISTER_OPND:
result->theOperand.xRegisterUnion =
(xRegisterOperandBodyType *) NULL;
break;
case Y_REGISTER_OPND:
result->theOperand.yRegisterUnion =
(yRegisterOperandBodyType *) NULL;
break;
case POST_INDEXED_Y_OPND:
result->theOperand.postIndexedYUnion =
(postIndexedYOperandBodyType *) arg;
break;
case PRE_INDEXED_X_OPND:
result->theOperand.preIndexedXUnion =
(preIndexedXOperandBodyType *) arg;
break;
case X_INDEXED_OPND:
result->theOperand.xIndexedUnion =
(xIndexedOperandBodyType *) arg;
break;
case Y_INDEXED_OPND:
result->theOperand.yIndexedUnion =
(yIndexedOperandBodyType *) arg;
break;
case X_SELECTED_OPND:
result->theOperand.xSelectedUnion =
(xSelectedOperandBodyType *) arg;
break;
case Y_SELECTED_OPND:
result->theOperand.ySelectedUnion =
(ySelectedOperandBodyType *) arg;
break;
case PRE_SELECTED_X_OPND:
result->theOperand.preSelectedUnion =
(preSelectedOperandBodyType *) arg;
break;
case STRING_OPND:
result->theOperand.stringUnion =
(stringOperandBodyType *) arg;
break;
case BLOCK_OPND:
result->theOperand.blockUnion = (blockOperandBodyType *) arg;
break;
default:
botch("unknown operand kind: %d\n", kindOfOperand);
break;
}
return(result);
}
/* corresponds to routines in fixups.c */
operandListType *
duplicateOperandForFixup(operandListType *operand, bool isSpecialFunctionOperand)
{
operandListType *result;
expressionType *duplicateExpressionForFixup(expressionType *expression, bool isTopLevel, bool isSpecialFunctionOperand);
result = typeAlloc(operandListType);
result->kindOfOperand = operand->kindOfOperand;
result->nextOperand = NULL;
if (operand->kindOfOperand != EXPRESSION_OPND)
newFixupAddressMode = operand->kindOfOperand;
switch (operand->kindOfOperand) {
case EXPRESSION_OPND:
case IMMEDIATE_OPND:
case INDIRECT_OPND:
case POST_INDEXED_Y_OPND:
case PRE_INDEXED_X_OPND:
case X_INDEXED_OPND:
case Y_INDEXED_OPND:
result->theOperand.expressionUnion =
duplicateExpressionForFixup(operand->theOperand.expressionUnion,
FALSE, isSpecialFunctionOperand);
break;
case X_SELECTED_OPND:
case Y_SELECTED_OPND:
case PRE_SELECTED_X_OPND:
result->theOperand.expressionUnion =
duplicateExpressionForFixup(operand->theOperand.xSelectedUnion,
FALSE, isSpecialFunctionOperand);
break;
case A_REGISTER_OPND:
case X_REGISTER_OPND:
case Y_REGISTER_OPND:
result->theOperand = operand->theOperand;
break;
case STRING_OPND:
result->theOperand = operand->theOperand;
break;
case BLOCK_OPND:
error(CANT_FORWARD_REFERENCE_BLOCK_ERROR);
result = NULL;
break;
}
return(result);
}
/* corresponds to routines in garbage.c */
#define nullFree(thing) if (thing == NULL) return;
void
freeOperand(operandType *operand)
{
nullFree(operand);
switch (operand->kindOfOperand) {
case EXPRESSION_OPND:
case IMMEDIATE_OPND:
case INDIRECT_OPND:
case POST_INDEXED_Y_OPND:
case PRE_INDEXED_X_OPND:
case X_INDEXED_OPND:
case Y_INDEXED_OPND:
freeExpression(operand->theOperand.expressionUnion);
break;
case A_REGISTER_OPND:
case X_REGISTER_OPND:
case Y_REGISTER_OPND:
break;
case X_SELECTED_OPND:
case Y_SELECTED_OPND:
case PRE_SELECTED_X_OPND:
freeSelectionList(operand->theOperand.xSelectedUnion);
break;
case STRING_OPND:
freeString(operand->theOperand.stringUnion);
break;
case BLOCK_OPND:
freeBlock(operand->theOperand.blockUnion);
break;
default:
botch("bad operand kind in freeOperand %d\n",
operand->kindOfOperand);
break;
}
freeOperand(operand->nextOperand);
free(operand);
}
/* corresponds to routines in listing.c */
void
expandOperand(operandKindType addressMode, char *buffer)
{
switch (addressMode) {
case IMMEDIATE_OPND: moreText("#"); break;
case INDIRECT_OPND: moreText("@"); break;
case POST_INDEXED_Y_OPND: moreText("y[@"); break;
case PRE_INDEXED_X_OPND: moreText("@x["); break;
case X_INDEXED_OPND: moreText("x["); break;
case Y_INDEXED_OPND: moreText("y["); break;
case A_REGISTER_OPND: moreText("a"); break;
case X_REGISTER_OPND: moreText("x"); break;
case Y_REGISTER_OPND: moreText("y"); break;
case X_SELECTED_OPND: moreText("x"); break;
case Y_SELECTED_OPND: moreText("y"); break;
case PRE_SELECTED_X_OPND: moreText("@x"); break;
default: break;
}
expandExpression(NULL, NULL);
if (addressMode == POST_INDEXED_Y_OPND ||
addressMode == PRE_INDEXED_X_OPND ||
addressMode == X_INDEXED_OPND ||
addressMode == Y_INDEXED_OPND)
moreText("]");
}
/* corresponds to routines in expressionSemantics.c */
#define nullEvaluate(thing) if (thing==NULL) return(NULL);
#define fail(err) if (!expressionFailed) {\
error(err);\
expressionFailed = TRUE;\
}
#define fail1(err,arg) if (!expressionFailed) {\
error(err,arg);\
expressionFailed = TRUE;\
}
#define fail2(err,arg1,arg2) if (!expressionFailed) {\
error(err,arg1,arg2);\
expressionFailed = TRUE;\
}
#define qfree2(a,b) if (freeFlag) { free(a); free(b); }
#define expansionOff() {saveExpansion=expandMacros; expandMacros=FALSE;}
#define forceExpansion() {saveExpansion=expandMacros; expandMacros=TRUE;}
#define expansionOn() expandMacros=saveExpansion;
valueType *
evaluateOperand(operandType *operand)
{
valueType *result;
bool saveExpansion;
expressionType *expression;
valueType *evaluateExpression(expressionType *expression, fixupKindType kindOfFixup);
valueType *evaluateSelectionList(selectionListType *selectionList);
valueType *newValue(valueKindType kindOfValue, int value, operandKindType addressMode);
nullEvaluate(operand);
if (operand->kindOfOperand != EXPRESSION_OPND)
newFixupAddressMode = operand->kindOfOperand;
switch (operand->kindOfOperand) {
case EXPRESSION_OPND:
case IMMEDIATE_OPND:
case INDIRECT_OPND:
case POST_INDEXED_Y_OPND:
case PRE_INDEXED_X_OPND:
case X_INDEXED_OPND:
case Y_INDEXED_OPND:
result = evaluateExpression(operand->theOperand.expressionUnion,
performingFixups ? NO_FIXUP : OPERAND_FIXUP);
if (operand->kindOfOperand != EXPRESSION_OPND) {
if (result->addressMode != EXPRESSION_OPND) {
error(BAD_ADDRESS_MODE_ERROR);
result->kindOfValue = FAIL;
} else {
result->addressMode = operand->kindOfOperand;
}
}
break;
case A_REGISTER_OPND:
case X_REGISTER_OPND:
case Y_REGISTER_OPND:
result = newValue(UNDEFINED_VALUE, 0, operand->
kindOfOperand);
break;
case X_SELECTED_OPND:
case Y_SELECTED_OPND:
case PRE_SELECTED_X_OPND:
result = evaluateSelectionList(operand->theOperand.xSelectedUnion);
if (result->addressMode != EXPRESSION_OPND) {
error(BAD_ADDRESS_MODE_ERROR);
result->kindOfValue = FAIL;
} else {
result->addressMode = operand->kindOfOperand;
}
break;
case STRING_OPND:
result = newValue(STRING_VALUE, operand->theOperand.stringUnion,
STRING_OPND);
break;
case BLOCK_OPND:
if (standaloneExpansionFlag)
forceExpansion();
sideEffectFlag = TRUE;
assembleBlock(operand->theOperand.blockUnion);
expansionOn();
result = newValue(FAIL, 0, BLOCK_OPND);
break;
default:
botch("bad operand kind in evaluateOperand %d\n",
operand->kindOfOperand);
break;
}
return(result);
}
/* from parserMisc.c */
conditionType
invertConditionCode(conditionType conditionCode)
{
#define cc (int)conditionCode
if ((int)CARRY_COND<=cc && cc<=(int)ALWAYS_COND)
return((conditionType)
(cc - (int)CARRY_COND + (int)NOT_CARRY_COND));
else if ((int)NOT_CARRY_COND<=cc && cc<=(int)NEVER_COND)
return((conditionType)
(cc + (int)CARRY_COND - (int)NOT_CARRY_COND));
else
botch("invertConditionCode given %d, not a condition code\n");
}
/* from semanticMisc.c */
bool
shouldParenthesize(operandType *operand)
{
expressionTermKindType kind;
switch(operand->kindOfOperand) {
case EXPRESSION_OPND:
case IMMEDIATE_OPND:
case INDIRECT_OPND:
case POST_INDEXED_Y_OPND:
case PRE_INDEXED_X_OPND:
case X_INDEXED_OPND:
case Y_INDEXED_OPND:
kind = operand->theOperand.expressionUnion->kindOfTerm;
return (kind==UNOP_EXPR || kind==BINOP_EXPR || kind==
ASSIGN_EXPR);
break;
case X_SELECTED_OPND:
case Y_SELECTED_OPND:
case PRE_SELECTED_X_OPND:
return(TRUE);
break;
case A_REGISTER_OPND:
case X_REGISTER_OPND:
case Y_REGISTER_OPND:
case STRING_OPND:
case BLOCK_OPND:
return(FALSE);
break;
}
}
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