diff --git a/target-s390x/insn-data.def b/target-s390x/insn-data.def
index 6b81f69..c5c5614 100644
--- a/target-s390x/insn-data.def
+++ b/target-s390x/insn-data.def
@@ -131,6 +131,10 @@
     C(0xc607, CLHRL,   RIL_b, GIE, r1_o, mri2_16u, 0, 0, 0, cmpu32)
     C(0xc606, CLGHRL,  RIL_b, GIE, r1_o, mri2_16u, 0, 0, 0, cmpu64)
 
+/* CONVERT TO DECIMAL */
+    C(0x4e00, CVD,     RX_a,  Z,   r1_o, a2, 0, 0, cvd, 0)
+    C(0xe326, CVDY,    RXY_a, LD,  r1_o, a2, 0, 0, cvd, 0)
+
 /* DIVIDE */
     C(0x1d00, DR,      RR_a,  Z,   r1_D32, r2_32s, new_P, r1_P32, divs32, 0)
     C(0x5d00, D,       RX_a,  Z,   r1_D32, m2_32s, new_P, r1_P32, divs32, 0)