1 files changed, 18 insertions, 0 deletions
diff --git a/opcodes/mips-formats.h b/opcodes/mips-formats.h
index 49a0623da53..4b5aaaf31a3 100644
--- a/opcodes/mips-formats.h
+++ b/opcodes/mips-formats.h
@@ -69,6 +69,14 @@
     return &op.root; \
   }
 
+#define OPTIONAL_REG(SIZE, LSB, BANK) \
+  { \
+    static const struct mips_reg_operand op = { \
+      { OP_OPTIONAL_REG, SIZE, LSB }, OP_REG_##BANK, 0 \
+    }; \
+    return &op.root; \
+  }
+
 #define MAPPED_REG(SIZE, LSB, BANK, MAP) \
   { \
     typedef char ATTRIBUTE_UNUSED \
@@ -79,6 +87,16 @@
     return &op.root; \
   }
 
+#define OPTIONAL_MAPPED_REG(SIZE, LSB, BANK, MAP) \
+  { \
+    typedef char ATTRIBUTE_UNUSED \
+      static_assert[(1 << (SIZE)) == ARRAY_SIZE (MAP)]; \
+    static const struct mips_reg_operand op = { \
+      { OP_OPTIONAL_REG, SIZE, LSB }, OP_REG_##BANK, MAP \
+    }; \
+    return &op.root; \
+  }
+
 #define REG_PAIR(SIZE, LSB, BANK, MAP) \
   { \
     typedef char ATTRIBUTE_UNUSED \