CAR: added stack operations, call, ret, jmp and some other random stuff

helpers.c

@@ -4,10 +4,23 @@
  * CAR (Cool ARM Ripoff) copyright (c) 2026 David J Goeke. All rights reserved.
  * Unauthorized (re)distribution is prohibited.
 */
+#include <string.h>
 #include <stdio.h>
 
 #include "include/defs.h"
 
+void _push(uint32_t v, pstate_t* state)
+{
+	state->sp--;
+	memcpy(state->memory + state->sp, &v, sizeof(v));
+}
+
+void _pop(uint32_t* a, pstate_t* state)
+{
+	memcpy(a, state->memory + state->sp, sizeof(*a));
+	state->sp++;
+}
+
 void dump_regs(pstate_t* s)
 {
 	printf("r0:  0x%08x r1:  0x%08x r2:  0x%08x, r3:  0x%08x\n", s->gprs[0], s->gprs[1], s->gprs[2], s->gprs[3]);