Use cur_insn_len to store the length of the current instruction to
prepare for PC-relative translation.

Signed-off-by: Weiwei Li <liweiwei@iscas.ac.cn>
Signed-off-by: Junqiang Wang <wangjunqiang@iscas.ac.cn>
---
 target/riscv/translate.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/target/riscv/translate.c b/target/riscv/translate.c
index 1c8eae86c5..eee13b1225 100644
--- a/target/riscv/translate.c
+++ b/target/riscv/translate.c
@@ -59,6 +59,7 @@ typedef struct DisasContext {
     DisasContextBase base;
     /* pc_succ_insn points to the instruction following base.pc_next */
     target_ulong pc_succ_insn;
+    target_ulong cur_insn_len;
     target_ulong priv_ver;
     RISCVMXL misa_mxl_max;
     RISCVMXL xl;
@@ -1117,8 +1118,9 @@ static void decode_opc(CPURISCVState *env, DisasContext *ctx, uint16_t opcode)
     };
 
     ctx->virt_inst_excp = false;
+    ctx->cur_insn_len = insn_len(opcode);
     /* Check for compressed insn */
-    if (insn_len(opcode) == 2) {
+    if (ctx->cur_insn_len == 2) {
         ctx->opcode = opcode;
         ctx->pc_succ_insn = ctx->base.pc_next + 2;
         if (has_ext(ctx, RVC) && decode_insn16(ctx, opcode)) {
-- 
2.25.1