jump

src/instructions/impl/JMP.c

@@ -0,0 +1,40 @@
+#include "impl_macros.h"
+
+// JUMP [destination address]
+i32 JMP_impl(VM* vm){
+    u32 dst_addr = 0;
+    readVar(dst_addr);
+
+    vm->current_pos = dst_addr;
+
+    return sizeof(dst_addr);
+}
+
+
+// JNZ [destination address] [condition register]
+i32 JNZ_impl(VM* vm){
+    u32 dst_addr = 0;
+    readVar(dst_addr);
+    u8 cond_register_i = 0;
+    readRegisterVar(cond_register_i);
+    
+    if(vm->registers.array[cond_register_i].u32v0 != 0){
+        vm->current_pos = dst_addr;
+    }
+    
+    return sizeof(dst_addr) + sizeof(cond_register_i);
+}
+
+// JZ [destination address] [condition register]
+i32 JZ_impl(VM* vm){
+    u32 dst_addr = 0;
+    readVar(dst_addr);
+    u8 cond_register_i = 0;
+    readRegisterVar(cond_register_i);
+    
+    if(vm->registers.array[cond_register_i].u32v0 == 0){
+        vm->current_pos = dst_addr;
+    }
+    
+    return sizeof(dst_addr) + sizeof(cond_register_i);
+}