From: bylex <mbilek06@gmail.com>
Date: Wed, 25 Sep 2024 06:24:58 +0000 (+0200)
Subject: Add initial interpreter state
X-Git-Url: https://git.bylex.cz/?a=commitdiff_plain;h=4bb1fa32671bdab08289e5be66652d8ed771b922;p=maturita.git

Add initial interpreter state
---

diff --git a/interpreter.c b/interpreter.c
new file mode 100644
index 0000000..10ab391
--- /dev/null
+++ b/interpreter.c
@@ -0,0 +1,53 @@
+#include <stdio.h>
+#include <stdint.h>
+
+#include "opcodes.h"
+
+uint16_t regs[256];
+uint16_t mem[65536];
+
+uint16_t stack[256];
+uint8_t stack_pointer;
+
+uint16_t current_instruction = 0; // entry location
+bool halted = false;
+uint8_t halted_reason = 0;
+
+uint64_t instruction_counter = 0;
+
+
+
+void load_mem()
+{
+	mem[0] = (uint16_t)4 << 8 | 0;
+	mem[1] = 1234;
+
+	mem[2] = (uint16_t)4 << 8 | 1;
+	mem[3] = 1000;
+
+	mem[6] = (uint16_t)1 << 8 | 0;
+	mem[7] = (uint16_t)1 << 8 | 0;
+	
+	mem[8] = (uint16_t)9 << 8 | 0;
+	mem[9] = 0;
+}
+
+
+
+int main(int argc, char *argv[])
+{
+	load_mem();
+	while(!halted)
+	{
+		uint8_t arg1 = (uint8_t)mem[current_instruction];
+		uint8_t instruction = (uint8_t)(mem[current_instruction] >> 8);
+		uint8_t arg3 = (uint8_t)mem[current_instruction + 1];
+		uint8_t arg2 = (uint8_t)(mem[current_instruction + 1] >> 8);
+		printf("Executing at 0x%04x; Instruction number %ld\r", current_instruction, instruction_counter);
+		fflush(stdout);
+		(*opcodes[instruction]) (arg1, arg2, arg3);
+		instruction_counter++;
+	}
+	printf("Execution halted: cause %d\n", halted_reason);
+	
+}