/*
* Description:
* Grabs an instruction from the instruction trace (if possible)
* Inputs:
* trace: instruction trace with all the instructions executed
* Returns:
* None
*/
void fetch(instruction_trace_t* trace) {
/* ECE552: YOUR CODE GOES HERE */
/* ECE552 Assignment 3 - BEGIN CODE */
//I have valid index
instruction_t *currInstr = get_instr(trace, fetch_index);
instr_push(currInstr);
fetch_index++;
//REMOVE THIS BEFORE SUBMISSION
/* ECE552 Assignment 3 - END CODE */
}
void machine_t::exec(Op operation)
{
switch(operation) {
default: error("Unknown instruction"); break;
case NOP: instr_nop(); break;
// Strictly speaking, SUB can be implemented
// by ADDing the minuend with the two's complement
// of the subtrahend -- but that's not necessarily
// portable down to native code
case ADD: instr_add(); break;
case SUB: instr_sub(); break; // non-primitive
// Strictly speaking, all but NOT and AND are
// non-primitive (or some other combination of
// two operations)
case AND: instr_and(); break;
case OR: instr_or(); break;
case XOR: instr_xor(); break;
case NOT: instr_not(); break;
case COMPL: instr_compl(); break;
// Should be replaced with x86 INT-like operations
case IN: instr_in(); break;
case OUT: instr_out(); break;
case LOAD: instr_load(); break;
case STOR: instr_stor(); break;
case PUSH: instr_push(); break;
case DROP: instr_drop(); break;
case PUSHIP: instr_puship(); break;
case POPIP: instr_popip(); break;
case DROPIP: instr_dropip(); break;
case JZ: instr_jz(); break;
case JMP: instr_jmp(); break; // non-primitive
case JNZ: instr_jnz(); break; // non-primitive
case DUP: instr_dup(); break; // non-primitive
case SWAP: instr_swap(); break; // non-primitive
case ROL3: instr_rol3(); break; // non-primitive
case OUTNUM: instr_outnum(); break; // non-primitive
}
}
int assemble(FILE *in, FILE *out)
{
/* Write magic */
int magic = FILE_MAGIC;
fwrite(&magic, sizeof(int), 1, out);
char line[1024];
while(fgets(line,1024,in) != NULL) {
lineno++;
if(line[0] == '#' || line[0] == '\n') {
continue;
} else if(!strncmp(line, "push ", 5)) {
instr_push(out,line+5);
} else if(!strncmp(line, "push_i ", 7)) {
instr_push_i(out,line+7);
} else if(!strncmp(line, "push_o ", 7)) {
instr_push_o(out,line+7);
} else if(!strncmp(line, "push_k ", 7)) {
instr_push_k(out,line+7);
} else if(!strncmp(line, "node ", 5)) {
instr_node(out,line+5);
} else if(!strncmp(line, "nodem ", 6)) {
instr_nodem(out,line+6);
} else if(!strncmp(line, "redex", 5)) {
instr_redex(out,line+5);
} else if(!strncmp(line, "reactum", 7)) {
instr_reactum(out,line+7);
} else if(!strncmp(line, "reaction", 8)) {
instr_reaction(out,line+8);
} else {
fprintf(stderr, "Error: invalid instruction at line %d:\n%s",
lineno, line);
return FALSE;
}
}
if(stackptr > 0) {
fprintf(stderr, "Warning: spare tokens on symbol stack\n");
}
return TRUE;
}