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-rw-r--r--gcc/config/sh/sh.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/config/sh/sh.h b/gcc/config/sh/sh.h
index 7a2af0a..7e729478 100644
--- a/gcc/config/sh/sh.h
+++ b/gcc/config/sh/sh.h
@@ -2473,4 +2473,10 @@ extern int current_function_interrupt;
/* FIXME: middle-end support for highpart optimizations is missing. */
#define high_life_started reload_in_progress
+/* The tas.b instruction sets the 7th bit in the byte, i.e. 0x80.
+ This value is used by optabs.c atomic op expansion code as well as in
+ sync.md. */
+#undef TARGET_ATOMIC_TEST_AND_SET_TRUEVAL
+#define TARGET_ATOMIC_TEST_AND_SET_TRUEVAL 0x80
+
#endif /* ! GCC_SH_H */