/* Initialize the "hardware" and operation and function dispatcher */
void initialize() {
int i;
/* Initialize operations with default values */
for (i=0; i<OPERATION_COUNT; ++i) {
assignOperation(i, "ndef", specialType, 0);
}
/* to deal with operations with OpCode = 0, i.e. R-Type */
assignOperation(OC_ZERO, "zero", rType, 0);
/* assign some actual operations */
assignOperation(OC_ADDI, "addi", iType, 0);
assignOperation(OC_J, "j", jType, 0);
assignOperation(OC_LUI, "lui", iType, 0);
assignOperation(OC_LW, "lw", iType, 0);
assignOperation(OC_ORI, "ori", iType, 0);
assignOperation(OC_SW, "sw", iType, 0);
assignOperation(OC_STOP,"stop", specialType, 0);
/* Initialize operations with OpCode = 0 and corresponding functions with default values*/
for (i=0; i<FUNCTION_COUNT; ++i) {
assignFunction(i, "ndef", 0);
}
/* assign some actual functions */
assignFunction(FC_ADD, "add", 0);
assignFunction(FC_SUB, "sub", 0);
}
/* Initialize the "hardware" and operation and function dispatcher */
void initialize() {
int i;
/* Initialize operations */
for (i=0; i<OPERATION_COUNT; ++i) {
assignOperation(i, "ndef", specialType, &undefinedOperation);
}
assignOperation(OC_ZERO, "zero", rType, &opCodeZeroOperation);
/* To stop the MIPS machine */
assignOperation(OC_STOP,"stop", specialType, &stopOperation);
assignOperation(OC_ADDI, "addi", iType, &mips_addi);
assignOperation(OC_LUI, "lui", iType ,&mips_lui);
assignOperation(OC_LW, "lw", iType, &mips_lw);
assignOperation(OC_ORI, "ori", iType, &mips_ori);
assignOperation(OC_SW, "sw", iType, &mips_sw);
/* Initialize operations with OpCode = 0 and corresponding functions */
for (i=0; i<FUNCTION_COUNT; ++i) {
assignFunction(i, "ndef", &undefinedFunction);
}
assignFunction(FC_ADD, "add", &mips_add);
assignFunction(FC_DIV, "div", &mips_div);
assignFunction(FC_MULT, "mult", &mips_mult);
assignFunction(FC_SUB, "sub", &mips_sub);
initializeMemory();
/* Initialize registers */
for (i=0; i<REGISTER_COUNT; ++i) {
registers[i]= 0;
}
/* Stack pointer */
SP=65535;
/* Initialize program counter */
pc = 0;
/* Yes, we want the machine to run */
doRun = TRUE;
}
