1 files changed, 7 insertions, 0 deletions

diff --git a/firmware/target/sh/system-target.h b/firmware/target/sh/system-target.h
index 3c225fbb69..2568911a1e 100644
--- a/firmware/target/sh/system-target.h
+++ b/firmware/target/sh/system-target.h
@@ -126,4 +126,11 @@ static inline uint32_t swap_odd_even32(uint32_t value)
     return value;
 }
 
+extern const unsigned bit_n_table[32];
+#define BIT_N(n) ( \
+    __builtin_constant_p(n) \
+    ? (1LU << (n)) \
+    : bit_n_table[n] \
+)
+
 #endif /* SYSTEM_TARGET_H */