+#if SIZEOF_REGISTER == 4
+
+#define MIPS_SW mips_sw
+#define MIPS_LW mips_lw
+#define MIPS_ADDU mips_addu
+#define MIPS_ADDIU mips_addiu
+#define MIPS_SWC1 mips_swc1
+#define MIPS_LWC1 mips_lwc1
+#define MIPS_MOVE mips_move
+
+#elif SIZEOF_REGISTER == 8
+
+#define MIPS_SW mips_sd
+#define MIPS_LW mips_ld
+#define MIPS_ADDU mips_daddu
+#define MIPS_ADDIU mips_daddiu
+#define MIPS_SWC1 mips_sdc1
+#define MIPS_LWC1 mips_ldc1
+#define MIPS_MOVE mips_dmove
+
+#else
+#error Unknown SIZEOF_REGISTER
+#endif
+