disas/riscv: Make rv_op_illegal a shared enum value

The enum value 'rv_op_illegal' does not represent an
instruction, but is a catch-all value in case we have
no match in the decoder. Let's make the value a shared
one, so that other compile units can reuse it.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
Signed-off-by: Christoph Müllner <christoph.muellner@vrull.eu>
Message-Id: <20230612111034.3955227-5-christoph.muellner@vrull.eu>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

2 files changed, 5 insertions, 1 deletions

diff --git a/disas/riscv.c b/disas/riscv.c
index 4a55348267..b6ced2a26a 100644
--- a/disas/riscv.c
+++ b/disas/riscv.c
@@ -23,7 +23,7 @@
 #include "disas/riscv.h"
 
 typedef enum {
-    rv_op_illegal = 0,
+    /* 0 is reserved for rv_op_illegal. */
     rv_op_lui = 1,
     rv_op_auipc = 2,
     rv_op_jal = 3,
diff --git a/disas/riscv.h b/disas/riscv.h
index 9288255915..debbe69239 100644
--- a/disas/riscv.h
+++ b/disas/riscv.h
@@ -192,6 +192,10 @@ typedef struct {
 } rv_comp_data;
 
 enum {
+    rv_op_illegal = 0
+};
+
+enum {
     rvcd_imm_nz = 0x1
 };