build struct for loadstore instructions
This commit is contained in:
EDiasAlberto
parent
344f455be3
commit
c52de918db
57
src/parser.c
57
src/parser.c
@ -34,34 +34,32 @@ int isOperandRegister(char regStartChar){
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//calculate offsets from string
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void calcluateAddressFormat(a64inst_instruction *instr, char *operandList[], int numOperands){
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char *endptr;
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char baseRegParam[strlen(operandList[1])];
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strcpy(baseRegParam, operandList[1]);
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char *startptr = &baseRegParam[1];
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int base = getOperandNumber(startptr);
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instr->data.SingleTransferData.processOpData.singleDataTransferData.base = base;
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if(operandList[2][strlen(operandList[2])-1] == '!'){
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if(operandList[2][strlen(operandList[2])-2] == '!'){
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instr->data.SingleTransferData.processOpData.singleDataTransferData.addressingMode = a64inst_PRE_INDEXED;
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instr->data.SingleTransferData.processOpData.singleDataTransferData.a64inst_addressingModeData.indexedOffset = strtol(&(operandList[2][1]), &endptr, 10);
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} else if(operandList[1][strlen(operandList[1])-1] == ']') {
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instr->data.SingleTransferData.processOpData.singleDataTransferData.a64inst_addressingModeData.indexedOffset = getOperandNumber(operandList[2]);
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} else if(operandList[1][strlen(operandList[1])-2] == ']') {
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//post-indexed
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char immOffset[strlen(operandList[2])+1];
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strcpy(immOffset, operandList[2]);
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instr->data.SingleTransferData.processOpData.singleDataTransferData.addressingMode = a64inst_POST_INDEXED;
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instr->data.SingleTransferData.processOpData.singleDataTransferData.a64inst_addressingModeData.indexedOffset = strtol(&(operandList[2][1]), &endptr, 10);
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instr->data.SingleTransferData.processOpData.singleDataTransferData.a64inst_addressingModeData.indexedOffset = getOperandNumber(immOffset);
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} else if( (isOperandRegister(operandList[1][0]) == 1)
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|| (isOperandRegister(operandList[2][0]) == 1)){
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//register
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instr->data.SingleTransferData.processOpData.singleDataTransferData.addressingMode = a64inst_REGISTER_OFFSET;
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instr->data.SingleTransferData.processOpData.singleDataTransferData.a64inst_addressingModeData.offsetReg = strtol(&(operandList[2][1]), &endptr, 10);
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instr->data.SingleTransferData.processOpData.singleDataTransferData.a64inst_addressingModeData.offsetReg = getOperandNumber(operandList[2]);
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} else {
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instr->data.SingleTransferData.processOpData.singleDataTransferData.addressingMode = a64inst_UNSIGNED_OFFSET;
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if(numOperands==3){
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int offset = strtol(&(operandList[2][1]), &endptr, 10);
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if(instr->data.SingleTransferData.regType == 1){
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instr->data.SingleTransferData.processOpData.singleDataTransferData.a64inst_addressingModeData.unsignedOffset = offset/8;
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} else {
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instr->data.SingleTransferData.processOpData.singleDataTransferData.a64inst_addressingModeData.unsignedOffset = offset/4;
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}
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int offset = getOperandNumber(operandList[2]);
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instr->data.SingleTransferData.processOpData.singleDataTransferData.a64inst_addressingModeData.unsignedOffset = offset/8;
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//NEED TO SCALE IMMEDIATE VALUE BASED ON REGISTER TYPE IN ASSEMBLER
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}
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}
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}
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@ -79,6 +77,19 @@ void generateLoadStoreOperands(a64inst_instruction *instr, char *opcode, char *o
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break;
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}
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case a64inst_LOADLITERAL:
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if(operandList[0][0] == 'x') {
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instr->data.SingleTransferData.regType = 1;
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} else {
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instr->data.SingleTransferData.regType = 0;
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}
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instr->data.SingleTransferData.target = getOperandNumber(operandList[0]);
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if(operandList[1][0] =='#'){
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//offset is immediate
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int offset = getOperandNumber(operandList[1]);
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instr->data.SingleTransferData.processOpData.loadLiteralData.offset = offset;
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} else {
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//offset is literal, use symbol table and calculate difference
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}
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break;
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default:
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break;
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@ -87,7 +98,6 @@ void generateLoadStoreOperands(a64inst_instruction *instr, char *opcode, char *o
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}
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void generateBranchOperands(a64inst_instruction *instr, char* opcode, char *operandList[]){
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char *endptr;
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switch(instr->data.BranchData.BranchType){
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case a64inst_UNCONDITIONAL:
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//define and sign extend immediate offset
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@ -95,7 +105,7 @@ void generateBranchOperands(a64inst_instruction *instr, char* opcode, char *oper
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printf("unconditional");
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break;
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case a64inst_REGISTER:
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instr->data.BranchData.processOpData.registerData.src = strtol(operandList[0] + 1, &endptr, 10);
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instr->data.BranchData.processOpData.registerData.src = getOperandNumber(operandList[0]);
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break;
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case a64inst_CONDITIONAL:
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{
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@ -138,10 +148,10 @@ void classifyOpcode(char* opcode, a64inst_instruction *instr, char *operandList[
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isRegister == 0 ||
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strncmp(opcode, "b.", 2) == 0){
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instr->type = a64inst_BRANCH;
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if(isUnconditional){
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instr->data.BranchData.BranchType = a64inst_UNCONDITIONAL;
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} else if (isRegister){
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if(isRegister == 0){
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instr->data.BranchData.BranchType = a64inst_REGISTER;
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} else if (isUnconditional == 0){
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instr->data.BranchData.BranchType = a64inst_UNCONDITIONAL;
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} else {
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instr->data.BranchData.BranchType = a64inst_CONDITIONAL;
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}
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@ -152,19 +162,12 @@ void classifyOpcode(char* opcode, a64inst_instruction *instr, char *operandList[
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instr->type = a64inst_SINGLETRANSFER;
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instr->data.SingleTransferData.SingleTransferOpType = a64inst_SINGLE_TRANSFER_SINGLE_DATA_TRANSFER;
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if(isLoad == 0){
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instr->data.SingleTransferData.processOpData.singleDataTransferData.transferType = a64inst_STORE;
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} else {
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instr->data.SingleTransferData.processOpData.singleDataTransferData.transferType = a64inst_LOAD;
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} else {
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instr->data.SingleTransferData.processOpData.singleDataTransferData.transferType = a64inst_STORE;
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}
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} else {
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instr->type = a64inst_LOADLITERAL;
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if(operandList[0][0] =='#'){
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//offset is immediate
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int offset = getOperandNumber(operandList[0]);
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instr->data.SingleTransferData.processOpData.loadLiteralData.offset = offset;
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} else {
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//offset is literal, use symbol table and calculate difference
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}
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}
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} else {
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@ -190,7 +193,7 @@ void tokeniseOperands(char* str, int *operandCount, char *operands[], int *numOp
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operand = strtok(NULL, OPERAND_DELIMITER);
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operands[*(operandCount)] = operand;
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}
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*(numOperands) = *(operandCount)+1;
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*(numOperands) = *(operandCount);
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}
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//takes inputted assembly line and returns a
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