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diff --git a/cpu/sh2/compiler.h b/cpu/sh2/compiler.h
index b482c90..2a804c7 100644
--- a/cpu/sh2/compiler.h
+++ b/cpu/sh2/compiler.h
@@ -1,6 +1,15 @@
 int  sh2_drc_init(SH2 *sh2);
 void sh2_drc_finish(SH2 *sh2);
+void sh2_drc_mem_setup(SH2 *sh2);
 void sh2_drc_flush_all(void);
 void sh2_drc_wcheck_ram(unsigned int a, int val, int cpuid);
 void sh2_drc_wcheck_da(unsigned int a, int val, int cpuid);
 
+#define BLOCK_CYCLE_LIMIT 128
+
+#define OP_FLAGS(pc) op_flags[((pc) - (base_pc)) / 2]
+#define OF_DELAY_OP (1 << 0)
+#define OF_TARGET   (1 << 1)
+
+void scan_block(unsigned int base_pc, int is_slave,
+		unsigned char *op_flags, unsigned int *end_pc);