Signed-off-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/insn32.decode                  |  2 ++
 target/riscv/insn_trans/trans_rvzabha.c.inc | 14 ++++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode
index 8a4801d442..eee48f92d3 100644
--- a/target/riscv/insn32.decode
+++ b/target/riscv/insn32.decode
@@ -1041,3 +1041,5 @@ amomin_h   10000 . . ..... ..... 001 ..... 0101111 @atom_st
 amomax_h   10100 . . ..... ..... 001 ..... 0101111 @atom_st
 amominu_h  11000 . . ..... ..... 001 ..... 0101111 @atom_st
 amomaxu_h  11100 . . ..... ..... 001 ..... 0101111 @atom_st
+amocas_b    00101 . . ..... ..... 000 ..... 0101111 @atom_st
+amocas_h    00101 . . ..... ..... 001 ..... 0101111 @atom_st
diff --git a/target/riscv/insn_trans/trans_rvzabha.c.inc b/target/riscv/insn_trans/trans_rvzabha.c.inc
index 9093a1cfc1..ce8edcba62 100644
--- a/target/riscv/insn_trans/trans_rvzabha.c.inc
+++ b/target/riscv/insn_trans/trans_rvzabha.c.inc
@@ -129,3 +129,17 @@ static bool trans_amomaxu_h(DisasContext *ctx, arg_amomaxu_h *a)
     REQUIRE_ZABHA(ctx);
     return gen_amo(ctx, a, &tcg_gen_atomic_fetch_umax_tl, MO_TESW);
 }
+
+static bool trans_amocas_b(DisasContext *ctx, arg_amocas_b *a)
+{
+    REQUIRE_ZACAS(ctx);
+    REQUIRE_ZABHA(ctx);
+    return gen_cmpxchg(ctx, a, MO_SB);
+}
+
+static bool trans_amocas_h(DisasContext *ctx, arg_amocas_h *a)
+{
+    REQUIRE_ZACAS(ctx);
+    REQUIRE_ZABHA(ctx);
+    return gen_cmpxchg(ctx, a, MO_ALIGN | MO_TESW);
+}
-- 
2.25.1