Add recompiled versions of mem->reg, reg->mem and imm->mem versions of MOV.

src/codegen_backend_x86-64_defs.h

@@ -6,3 +6,20 @@
 #define REG_EBP 5
 #define REG_ESI 6
 #define REG_EDI 7
+
+#define REG_RAX 0
+#define REG_RCX 1
+#define REG_RDX 2
+#define REG_RBX 3
+#define REG_RSP 4
+#define REG_RBP 5
+#define REG_RSI 6
+#define REG_RDI 7
+#define REG_R8  8
+#define REG_R9  9
+#define REG_R10 10
+#define REG_R11 11
+#define REG_R12 12
+#define REG_R13 13
+#define REG_R14 14
+#define REG_R15 15