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-rw-r--r--target/riscv/insn32.decode6
1 files changed, 6 insertions, 0 deletions
diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode
index 33597fe2bb..f22df04cfd 100644
--- a/target/riscv/insn32.decode
+++ b/target/riscv/insn32.decode
@@ -1004,3 +1004,9 @@ vgmul_vv    101000 1 ..... 10001 010 ..... 1110111 @r2_vm_1
 vsm4k_vi    100001 1 ..... ..... 010 ..... 1110111 @r_vm_1
 vsm4r_vv    101000 1 ..... 10000 010 ..... 1110111 @r2_vm_1
 vsm4r_vs    101001 1 ..... 10000 010 ..... 1110111 @r2_vm_1
+
+# *** RV32 Zacas Standard Extension ***
+amocas_w    00101 . . ..... ..... 010 ..... 0101111 @atom_st
+amocas_d    00101 . . ..... ..... 011 ..... 0101111 @atom_st
+# *** RV64 Zacas Standard Extension ***
+amocas_q    00101 . . ..... ..... 100 ..... 0101111 @atom_st