Initial release of CAR

processor.c

@@ -0,0 +1,67 @@
+/*
+ * Source file for core processor functions.
+ * 
+ * CAR (Cool ARM Ripoff) copyright (c) 2026 David J Goeke. All rights reserved.
+ * Unauthorized (re)distribution is prohibited.
+*/
+
+#include <time.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <assert.h>
+
+#include "include/defs.h"
+
+op_return_t dispatch(raw_instruction_t* r, pstate_t* state)
+{
+	uint8_t instruction_group = get_instruction_group(r);
+	
+	uint8_t opcode;
+	
+	switch (instruction_group)
+	{
+		case 0:
+			opcode = convert_raw2misc(r).opcode;
+			//assert(opcode < NUM_MISC_OPCODES);
+			return misc_ops[opcode](r, state);
+		case 1:
+			opcode = convert_raw2register(r).opcode;
+			return reg_ops[opcode](r, state);
+		case 2:
+			opcode = convert_raw2ls(r).opcode;
+			return ls_ops[opcode](r, state);
+		default:
+			printf("\n[ERROR] instruction group is invalid\n");
+			OP_RETURN_EXITING_ERROR
+	}
+	
+	OP_RETURN_EXITING_ERROR
+}
+
+int processor_start(pstate_t* state)
+{
+	while (state->pc < state->memory_size)
+	{
+#ifdef _DEBUG
+		printf("state->memory[pc] -> 0x%x, 0b%032b\n", state->memory[state->pc], state->memory[state->pc]);
+#endif
+		
+		op_return_t rv = dispatch((raw_instruction_t*) (state->memory + state->pc), state);
+		
+		if (rv.do_inc_pc)
+		{
+			state->pc++;
+		}
+		else if (rv.exiting_error)
+		{
+			printf("An error was occured\n");
+			return -1;
+		}
+		
+		dump_regs(state);
+		
+		usleep(300000);
+	}
+	
+	return 0;
+}