487 lines
13 KiB
C
487 lines
13 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
/*
|
|
actions.c -- Actions associated with various machine instruction
|
|
classes (6502 version).
|
|
|
|
Chip Morningstar -- Lucasfilm Ltd.
|
|
|
|
16-November-1984
|
|
*/
|
|
|
|
#include "macrossTypes.h"
|
|
#include "macrossGlobals.h"
|
|
#include "actions.h"
|
|
#include "emitStuff.h"
|
|
#include "errorStuff.h"
|
|
#include "semanticMisc.h"
|
|
|
|
#define operand (evaluatedOperands[0])
|
|
#define address (evaluatedOperands[0])->value
|
|
#define class (evaluatedOperands[0])->addressMode
|
|
#define binary opcode->opcode
|
|
|
|
/*
|
|
These routines are vectored off of the opcode lookup table. Each
|
|
instruction is of a particular category that defines which address modes
|
|
it accepts its operands in and what size (one byte or two) the operands
|
|
are. There is one "actionsXXXX" routine for each of these categories that
|
|
grabs the operand, checks the address mode, and emits the binary opcode
|
|
and operand.
|
|
*/
|
|
|
|
void
|
|
actionsDir1(opcodeTableEntryType *opcode, int numberOfOperands, valueType **evaluatedOperands)
|
|
{
|
|
#define ZERO_PAGE_ADDRESS_BIT 0x00
|
|
#define NON_ZERO_PAGE_ADDRESS_BIT 0x08
|
|
|
|
if(class==EXPRESSION_OPND && isByteAddress(operand) &&
|
|
isDefined(operand)){
|
|
emitByte(binary | ZERO_PAGE_ADDRESS_BIT);
|
|
emitByte(address);
|
|
} else if (wordCheck(address)) {
|
|
emitByte(binary | NON_ZERO_PAGE_ADDRESS_BIT);
|
|
putFixupsHere(WORD_FIXUP, 0);
|
|
emitWord(address);
|
|
}
|
|
}
|
|
|
|
void
|
|
actionsDir2(opcodeTableEntryType *opcode, int numberOfOperands, valueType **evaluatedOperands)
|
|
{
|
|
if (wordCheck(address)) {
|
|
emitByte(binary);
|
|
putFixupsHere(WORD_FIXUP, 0);
|
|
emitWord(address);
|
|
}
|
|
}
|
|
|
|
void
|
|
actionsDirIndir(opcodeTableEntryType *opcode, int numberOfOperands, valueType **evaluatedOperands)
|
|
{
|
|
#define DIRECT_ADDRESS_BIT 0x00
|
|
#define INDIRECT_ADDRESS_BIT 0x20
|
|
|
|
if (wordCheck(address)) {
|
|
if (class == INDIRECT_OPND)
|
|
emitByte(binary | INDIRECT_ADDRESS_BIT);
|
|
else
|
|
emitByte(binary | DIRECT_ADDRESS_BIT);
|
|
putFixupsHere(WORD_FIXUP, 0);
|
|
emitWord(address);
|
|
}
|
|
}
|
|
|
|
void
|
|
actionsDirX1(opcodeTableEntryType *opcode, int numberOfOperands, valueType **evaluatedOperands)
|
|
{
|
|
#define DIRECT_ADDRESS_ZERO_PAGE_BITS_X1 0x04
|
|
#define A_REGISTER_BITS_X1 0x08
|
|
#define DIRECT_ADDRESS_NON_ZERO_PAGE_BITS_X1 0x0C
|
|
#define X_INDEXED_ZERO_PAGE_BITS_X1 0x14
|
|
#define X_INDEXED_NON_ZERO_PAGE_BITS_X1 0x1C
|
|
|
|
if (class == EXPRESSION_OPND) {
|
|
if (isByteAddress(operand) && isDefined(operand)) {
|
|
emitByte(binary | DIRECT_ADDRESS_ZERO_PAGE_BITS_X1);
|
|
emitByte(address);
|
|
} else if (wordCheck(address)) {
|
|
emitByte(binary|DIRECT_ADDRESS_NON_ZERO_PAGE_BITS_X1);
|
|
putFixupsHere(WORD_FIXUP, 0);
|
|
emitWord(address);
|
|
}
|
|
} else if (class==X_INDEXED_OPND || class==X_SELECTED_OPND) {
|
|
if (isByteAddress(operand) && isDefined(operand)) {
|
|
emitByte(binary | X_INDEXED_ZERO_PAGE_BITS_X1);
|
|
emitByte(address);
|
|
} else if (wordCheck(address)) {
|
|
emitByte(binary | X_INDEXED_NON_ZERO_PAGE_BITS_X1);
|
|
putFixupsHere(WORD_FIXUP, 0);
|
|
emitWord(address);
|
|
}
|
|
} else {
|
|
emitByte(binary | A_REGISTER_BITS_X1);
|
|
}
|
|
}
|
|
|
|
void
|
|
actionsDirX2(opcodeTableEntryType *opcode, int numberOfOperands, valueType **evaluatedOperands)
|
|
{
|
|
#define DIRECT_ADDRESS_ZERO_PAGE_BITS_X2 0x00
|
|
#define DIRECT_ADDRESS_NON_ZERO_PAGE_BITS_X2 0x08
|
|
#define X_INDEXED_ZERO_PAGE_BITS_X2 0x10
|
|
#define X_INDEXED_NON_ZERO_PAGE_BITS_X2 0x18
|
|
|
|
if (class == EXPRESSION_OPND) {
|
|
if (isByteAddress(operand) && isDefined(operand)) {
|
|
emitByte(binary | DIRECT_ADDRESS_ZERO_PAGE_BITS_X2);
|
|
emitByte(address);
|
|
} else if (wordCheck(address)) {
|
|
emitByte(binary|DIRECT_ADDRESS_NON_ZERO_PAGE_BITS_X2);
|
|
putFixupsHere(WORD_FIXUP, 0);
|
|
emitWord(address);
|
|
}
|
|
} else {
|
|
if (isByteAddress(operand) && isDefined(operand)) {
|
|
emitByte(binary | X_INDEXED_ZERO_PAGE_BITS_X2);
|
|
emitByte(address);
|
|
} else if (wordCheck(address)) {
|
|
emitByte(binary | X_INDEXED_NON_ZERO_PAGE_BITS_X2);
|
|
putFixupsHere(WORD_FIXUP, 0);
|
|
emitWord(address);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
actionsDirX3(opcodeTableEntryType *opcode, int numberOfOperands, valueType **evaluatedOperands)
|
|
{
|
|
if (class == EXPRESSION_OPND) {
|
|
if (isByteAddress(operand) && isDefined(operand)) {
|
|
emitByte(binary | DIRECT_ADDRESS_ZERO_PAGE_BITS_X2);
|
|
emitByte(address);
|
|
} else if (wordCheck(address)) {
|
|
emitByte(binary|DIRECT_ADDRESS_NON_ZERO_PAGE_BITS_X2);
|
|
putFixupsHere(WORD_FIXUP, 0);
|
|
emitWord(address);
|
|
}
|
|
} else {
|
|
if (byteCheck(address)) {
|
|
emitByte(binary | X_INDEXED_ZERO_PAGE_BITS_X2);
|
|
putFixupsHere(BYTE_FIXUP, 0);
|
|
emitByte(address);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
actionsDirY(opcodeTableEntryType *opcode, int numberOfOperands, valueType **evaluatedOperands)
|
|
{
|
|
#define DIRECT_ADDRESS_ZERO_PAGE_BITS_Y 0x00
|
|
#define DIRECT_ADDRESS_NON_ZERO_PAGE_BITS_Y 0x08
|
|
#define Y_INDEXED_ZERO_PAGE_BITS_Y 0x10
|
|
|
|
if (class == EXPRESSION_OPND) {
|
|
if (isByteAddress(operand) && isDefined(operand)) {
|
|
emitByte(binary | DIRECT_ADDRESS_ZERO_PAGE_BITS_Y);
|
|
emitByte(address);
|
|
} else if (wordCheck(address)) {
|
|
emitByte(binary|DIRECT_ADDRESS_NON_ZERO_PAGE_BITS_Y);
|
|
putFixupsHere(WORD_FIXUP, 0);
|
|
emitWord(address);
|
|
}
|
|
} else {
|
|
if (byteCheck(address)) {
|
|
emitByte(binary | Y_INDEXED_ZERO_PAGE_BITS_Y);
|
|
putFixupsHere(BYTE_FIXUP, 0);
|
|
emitByte(address);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
actionsImmDir(opcodeTableEntryType *opcode, int numberOfOperands, valueType **evaluatedOperands)
|
|
{
|
|
#define IMMEDIATE_DATA_BITS_ID 0x00
|
|
#define DIRECT_ADDRESS_ZERO_PAGE_BITS_ID 0x04
|
|
#define DIRECT_ADDRESS_NON_ZERO_PAGE_BITS_ID 0x0C
|
|
|
|
if (class == IMMEDIATE_OPND) {
|
|
if (byteCheck(address)) {
|
|
emitByte(binary | IMMEDIATE_DATA_BITS_ID);
|
|
putFixupsHere(BYTE_FIXUP, 0);
|
|
emitByte(address);
|
|
}
|
|
} else {
|
|
if (isByteAddress(operand) && isDefined(operand)) {
|
|
emitByte(binary | DIRECT_ADDRESS_ZERO_PAGE_BITS_ID);
|
|
emitByte(address);
|
|
} else if (wordCheck(address)) {
|
|
emitByte(binary|DIRECT_ADDRESS_NON_ZERO_PAGE_BITS_ID);
|
|
putFixupsHere(WORD_FIXUP, 0);
|
|
emitWord(address);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
actionsImmDirX(opcodeTableEntryType *opcode, int numberOfOperands, valueType **evaluatedOperands)
|
|
{
|
|
#define IMMEDIATE_DATA_BITS_IX 0x00
|
|
#define DIRECT_ADDRESS_ZERO_PAGE_BITS_IX 0x04
|
|
#define DIRECT_ADDRESS_NON_ZERO_PAGE_BITS_IX 0x0C
|
|
#define X_INDEXED_ZERO_PAGE_BITS_IX 0x14
|
|
#define X_INDEXED_NON_ZERO_PAGE_BITS_IX 0x1C
|
|
|
|
if (class == IMMEDIATE_OPND) {
|
|
if (byteCheck(address)) {
|
|
emitByte(binary | IMMEDIATE_DATA_BITS_IX);
|
|
putFixupsHere(BYTE_FIXUP, 0);
|
|
emitByte(address);
|
|
}
|
|
} else if (class == EXPRESSION_OPND) {
|
|
if (isByteAddress(operand) && isDefined(operand)) {
|
|
emitByte(binary | DIRECT_ADDRESS_ZERO_PAGE_BITS_IX);
|
|
emitByte(address);
|
|
} else if (wordCheck(address)) {
|
|
emitByte(binary|DIRECT_ADDRESS_NON_ZERO_PAGE_BITS_IX);
|
|
putFixupsHere(WORD_FIXUP, 0);
|
|
emitWord(address);
|
|
}
|
|
} else {
|
|
if (isByteAddress(operand) && isDefined(operand)) {
|
|
emitByte(binary | X_INDEXED_ZERO_PAGE_BITS_IX);
|
|
emitByte(address);
|
|
} else if (wordCheck(address)) {
|
|
emitByte(binary | X_INDEXED_NON_ZERO_PAGE_BITS_IX);
|
|
putFixupsHere(WORD_FIXUP, 0);
|
|
emitWord(address);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
actionsImmDirY(opcodeTableEntryType *opcode, int numberOfOperands, valueType **evaluatedOperands)
|
|
{
|
|
#define IMMEDIATE_DATA_BITS_IY 0x00
|
|
#define DIRECT_ADDRESS_ZERO_PAGE_BITS_IY 0x04
|
|
#define DIRECT_ADDRESS_NON_ZERO_PAGE_BITS_IY 0x0C
|
|
#define Y_INDEXED_ZERO_PAGE_BITS_IY 0x14
|
|
#define Y_INDEXED_NON_ZERO_PAGE_BITS_IY 0x1C
|
|
|
|
if (class == IMMEDIATE_OPND) {
|
|
if (byteCheck(address)) {
|
|
emitByte(binary | IMMEDIATE_DATA_BITS_IY);
|
|
putFixupsHere(BYTE_FIXUP, 0);
|
|
emitByte(address);
|
|
}
|
|
} else if (class == EXPRESSION_OPND) {
|
|
if (isByteAddress(operand) && isDefined(operand)) {
|
|
emitByte(binary | DIRECT_ADDRESS_ZERO_PAGE_BITS_IY);
|
|
emitByte(address);
|
|
} else if (wordCheck(address)) {
|
|
emitByte(binary|DIRECT_ADDRESS_NON_ZERO_PAGE_BITS_IY);
|
|
putFixupsHere(WORD_FIXUP, 0);
|
|
emitWord(address);
|
|
}
|
|
} else {
|
|
if (isByteAddress(operand) && isDefined(operand)) {
|
|
emitByte(binary | Y_INDEXED_ZERO_PAGE_BITS_IY);
|
|
emitByte(address);
|
|
} else if (wordCheck(address)) {
|
|
emitByte(binary | Y_INDEXED_NON_ZERO_PAGE_BITS_IY);
|
|
putFixupsHere(WORD_FIXUP, 0);
|
|
emitWord(address);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
actionsImmIndex(opcodeTableEntryType *opcode, int numberOfOperands, valueType **evaluatedOperands)
|
|
{
|
|
#define PRE_INDEXED_BITS_A 0x00
|
|
#define DIRECT_ADDRESS_ZERO_PAGE_BITS_A 0x04
|
|
#define IMMEDIATE_DATA_BITS_A 0x08
|
|
#define DIRECT_ADDRESS_NON_ZERO_PAGE_BITS_A 0x0C
|
|
#define POST_INDEXED_BITS_A 0x10
|
|
#define X_INDEXED_ZERO_PAGE_BITS_A 0x14
|
|
#define Y_INDEXED_NON_ZERO_PAGE_BITS_A 0x18
|
|
#define X_INDEXED_NON_ZERO_PAGE_BITS_A 0x1C
|
|
|
|
if (class == EXPRESSION_OPND) {
|
|
if (isByteAddress(operand) && isDefined(operand)) {
|
|
emitByte(binary | DIRECT_ADDRESS_ZERO_PAGE_BITS_A);
|
|
emitByte(address);
|
|
} else if (wordCheck(address)) {
|
|
emitByte(binary |DIRECT_ADDRESS_NON_ZERO_PAGE_BITS_A);
|
|
putFixupsHere(WORD_FIXUP, 0);
|
|
emitWord(address);
|
|
}
|
|
} else if (class==X_INDEXED_OPND || class==X_SELECTED_OPND) {
|
|
if (isByteAddress(operand) && isDefined(operand)) {
|
|
emitByte(binary | X_INDEXED_ZERO_PAGE_BITS_A);
|
|
emitByte(address);
|
|
} else if (wordCheck(address)) {
|
|
emitByte(binary | X_INDEXED_NON_ZERO_PAGE_BITS_A);
|
|
putFixupsHere(WORD_FIXUP, 0);
|
|
emitWord(address);
|
|
}
|
|
} else if (class==Y_INDEXED_OPND || class==Y_SELECTED_OPND) {
|
|
if (wordCheck(address)) {
|
|
emitByte(binary | Y_INDEXED_NON_ZERO_PAGE_BITS_A);
|
|
putFixupsHere(WORD_FIXUP, 0);
|
|
emitWord(address);
|
|
}
|
|
} else if (class == IMMEDIATE_OPND) {
|
|
if (byteCheck(address)) {
|
|
emitByte(binary | IMMEDIATE_DATA_BITS_A);
|
|
putFixupsHere(BYTE_FIXUP, 0);
|
|
emitByte(address);
|
|
}
|
|
} else if (class == POST_INDEXED_Y_OPND) {
|
|
if (byteCheck(address)) {
|
|
emitByte(binary | POST_INDEXED_BITS_A);
|
|
putFixupsHere(BYTE_FIXUP, 0);
|
|
emitByte(address);
|
|
}
|
|
} else {
|
|
if (byteCheck(address)) {
|
|
emitByte(binary | PRE_INDEXED_BITS_A);
|
|
putFixupsHere(BYTE_FIXUP, 0);
|
|
emitByte(address);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
actionsIndex(opcodeTableEntryType *opcode, int numberOfOperands, valueType **evaluatedOperands)
|
|
{
|
|
if (class == EXPRESSION_OPND) {
|
|
if (isByteAddress(operand) && isDefined(operand)) {
|
|
emitByte(binary | DIRECT_ADDRESS_ZERO_PAGE_BITS_A);
|
|
emitByte(address);
|
|
} else if (wordCheck(address)) {
|
|
emitByte(binary |DIRECT_ADDRESS_NON_ZERO_PAGE_BITS_A);
|
|
putFixupsHere(WORD_FIXUP, 0);
|
|
emitWord(address);
|
|
}
|
|
} else if (class==X_INDEXED_OPND || class==X_SELECTED_OPND) {
|
|
if (isByteAddress(operand) && isDefined(operand)) {
|
|
emitByte(binary | X_INDEXED_ZERO_PAGE_BITS_A);
|
|
emitByte(address);
|
|
} else if (wordCheck(address)) {
|
|
emitByte(binary | X_INDEXED_NON_ZERO_PAGE_BITS_A);
|
|
putFixupsHere(WORD_FIXUP, 0);
|
|
emitWord(address);
|
|
}
|
|
} else if (class==Y_INDEXED_OPND || class==Y_SELECTED_OPND) {
|
|
if (wordCheck(address)) {
|
|
emitByte(binary | Y_INDEXED_NON_ZERO_PAGE_BITS_A);
|
|
putFixupsHere(WORD_FIXUP, 0);
|
|
emitWord(address);
|
|
}
|
|
} else if (class == POST_INDEXED_Y_OPND) {
|
|
if (byteCheck(address)) {
|
|
emitByte(binary | POST_INDEXED_BITS_A);
|
|
putFixupsHere(BYTE_FIXUP, 0);
|
|
emitByte(address);
|
|
}
|
|
} else {
|
|
if (byteCheck(address)) {
|
|
emitByte(binary | PRE_INDEXED_BITS_A);
|
|
putFixupsHere(BYTE_FIXUP, 0);
|
|
emitByte(address);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
actionsNone(opcodeTableEntryType *opcode, int numberOfOperands, valueType **evaluatedOperands)
|
|
{
|
|
emitByte(binary);
|
|
}
|
|
|
|
void
|
|
actionsRelative(opcodeTableEntryType *opcode, int numberOfOperands, valueType **evaluatedOperands)
|
|
{
|
|
int offset;
|
|
|
|
if (operand->kindOfValue == UNDEFINED_VALUE || (currentCodeMode ==
|
|
RELOCATABLE_BUFFER && targetOffset == 0))
|
|
offset = 0;
|
|
else
|
|
offset = address - (currentLocationCounter.value - targetOffset) - 1;
|
|
if (offset < 0)
|
|
offset--;
|
|
if (isByteOffset(offset)) {
|
|
emitByte(binary);
|
|
putFixupsHere(BYTE_RELATIVE_FIXUP, 0);
|
|
emitByte(offset);
|
|
} else {
|
|
error(RELATIVE_OFFSET_TOO_LARGE_ERROR);
|
|
}
|
|
}
|
|
|
|
/*
|
|
Miscellaneous helper predicates.
|
|
*/
|
|
|
|
bool
|
|
isByte(int value)
|
|
{
|
|
return (-129<value && value<256);
|
|
}
|
|
|
|
bool
|
|
isByteOffset(int value)
|
|
{
|
|
return (-129<value && value<128);
|
|
}
|
|
|
|
bool
|
|
isWordOffset(int value)
|
|
{
|
|
return (-32769<value && value<32768);
|
|
}
|
|
|
|
bool
|
|
isByteAddress(valueType *value)
|
|
{
|
|
return(value->kindOfValue==ABSOLUTE_VALUE && isByte(value->value));
|
|
}
|
|
|
|
bool
|
|
isWord(int value)
|
|
{
|
|
return (-32769<value && value<65536);
|
|
}
|
|
|
|
bool
|
|
byteCheck(int value)
|
|
{
|
|
if (isByte(value)) {
|
|
return(TRUE);
|
|
} else {
|
|
error(BYTE_VALUE_TOO_LARGE_ERROR, value);
|
|
return(FALSE);
|
|
}
|
|
}
|
|
|
|
bool
|
|
wordCheck(int value)
|
|
{
|
|
if (isWord(value)) {
|
|
return(TRUE);
|
|
} else {
|
|
printf("word: %d\n", value);
|
|
error(WORD_VALUE_TOO_LARGE_ERROR, value);
|
|
return(FALSE);
|
|
}
|
|
}
|
|
|
|
bool
|
|
isDefined(valueType *value)
|
|
{
|
|
return(value!=NULL && value->kindOfValue!=UNDEFINED_VALUE);
|
|
}
|