first commit

src/instructions/impl/impl_macros.h

@@ -0,0 +1,32 @@
+#pragma once
+#include "../instructions.h"
+
+#define readVar(VAR) {\
+    if(!VM_dataRead(vm, &VAR, pos, sizeof(VAR))) \
+        return -1;\
+    pos += sizeof(VAR);\
+}
+
+#define validateRegisterIndex(VAR) {\
+    if(VAR > sizeof(vm->registers)){\
+        VM_setErrorMessage(vm, "[%p] invalid register index (%x)", (void*)pos, VAR);\
+        return -1;\
+    }\
+}
+
+#define readRegisterVar(VAR) {\
+    readVar(VAR);\
+    validateRegisterIndex(VAR);\
+}
+
+#define validateValueSize(VAR) {\
+    if(VAR < 1 || VAR > 4){\
+        VM_setErrorMessage(vm, "[%p] invalid value_size (%x)", (void*)pos, VAR);\
+        return -1;\
+    }\
+}
+
+#define readValueSizeVar(VAR) {\
+    readVar(VAR);\
+    validateValueSize(VAR);\
+}