Implement Read/Write constraints on system registers on AArch64

[deliverable/binutils-gdb.git] / opcodes / aarch64-opc.h

diff --git a/opcodes/aarch64-opc.h b/opcodes/aarch64-opc.h
index 81d045eded8447c85b7b2acd3f760fd79346ea54..f741deac3f9a8975ad59b69e23b4c2d99491aa85 100644 (file)
--- a/opcodes/aarch64-opc.h
+++ b/opcodes/aarch64-opc.h
@@ -196,6 +196,26 @@ extern const aarch64_operand aarch64_operands[];
 #define OPD_F_OD_LSB           5
 #define OPD_F_NO_ZR            0x00000100      /* ZR index not allowed.  */
 
+/* Register flags.  */
+
+#undef F_DEPRECATED
+#define F_DEPRECATED   (1 << 0)  /* Deprecated system register.  */
+
+#undef F_ARCHEXT
+#define F_ARCHEXT      (1 << 1)  /* Architecture dependent system register.  */
+
+#undef F_HASXT
+#define F_HASXT                (1 << 2)  /* System instruction register <Xt>
+                                    operand.  */
+
+#undef F_REG_READ
+#define F_REG_READ     (1 << 3)  /* Register can only be used to read values
+                                    out of.  */
+
+#undef F_REG_WRITE
+#define F_REG_WRITE    (1 << 4)  /* Register can only be written to but not
+                                    read from.  */
+
 static inline bfd_boolean
 operand_has_inserter (const aarch64_operand *operand)
 {