diff --git a/tcg/s390/tcg-target-conset.h b/tcg/s390/tcg-target-conset.h
new file mode 100644
index 0000000000..e68baabbfd
--- /dev/null
+++ b/tcg/s390/tcg-target-conset.h
@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * S390 target-specific constaint sets.
+ * Copyright (c) 2020 Linaro
+ */
+
+C_O0_I1(r)
+C_O0_I2(L, L)
+C_O0_I2(r, r)
+C_O0_I2(r, ri)
+C_O1_I1(r, L)
+C_O1_I1(r, r)
+C_O1_I2(r, 0, ri)
+C_O1_I2(r, 0, rI)
+C_O1_I2(r, 0, rJ)
+C_O1_I2(r, r, ri)
+C_O1_I2(r, rZ, r)
+C_O1_I4(r, r, ri, r, 0)
+C_O1_I4(r, r, ri, rI, 0)
+C_O2_I2(b, a, 0, r)
+C_O2_I3(b, a, 0, 1, r)
+C_O2_I4(r, r, 0, 1, rA, r)
+C_O2_I4(r, r, 0, 1, ri, r)
+C_O2_I4(r, r, 0, 1, r, r)
diff --git a/tcg/s390/tcg-target.h b/tcg/s390/tcg-target.h
index 63c8797bd3..78277a8d07 100644
--- a/tcg/s390/tcg-target.h
+++ b/tcg/s390/tcg-target.h
@@ -162,5 +162,6 @@ static inline void tb_target_set_jmp_target(uintptr_t tc_ptr,
 #define TCG_TARGET_NEED_LDST_LABELS
 #endif
 #define TCG_TARGET_NEED_POOL_LABELS
+#define TCG_TARGET_CONSET_H
 
 #endif
diff --git a/tcg/s390/tcg-target.c.inc b/tcg/s390/tcg-target.c.inc
index d00d78f0b9..410f63104f 100644
--- a/tcg/s390/tcg-target.c.inc
+++ b/tcg/s390/tcg-target.c.inc
@@ -2274,27 +2274,11 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc,
     }
 }
 
-static const TCGTargetOpDef *tcg_target_op_def(TCGOpcode op)
+static int tcg_target_op_def(TCGOpcode op)
 {
-    static const TCGTargetOpDef r = { .args_ct_str = { "r" } };
-    static const TCGTargetOpDef r_r = { .args_ct_str = { "r", "r" } };
-    static const TCGTargetOpDef r_L = { .args_ct_str = { "r", "L" } };
-    static const TCGTargetOpDef L_L = { .args_ct_str = { "L", "L" } };
-    static const TCGTargetOpDef r_ri = { .args_ct_str = { "r", "ri" } };
-    static const TCGTargetOpDef r_r_ri = { .args_ct_str = { "r", "r", "ri" } };
-    static const TCGTargetOpDef r_0_ri = { .args_ct_str = { "r", "0", "ri" } };
-    static const TCGTargetOpDef r_0_rI = { .args_ct_str = { "r", "0", "rI" } };
-    static const TCGTargetOpDef r_0_rJ = { .args_ct_str = { "r", "0", "rJ" } };
-    static const TCGTargetOpDef a2_r
-        = { .args_ct_str = { "r", "r", "0", "1", "r", "r" } };
-    static const TCGTargetOpDef a2_ri
-        = { .args_ct_str = { "r", "r", "0", "1", "ri", "r" } };
-    static const TCGTargetOpDef a2_rA
-        = { .args_ct_str = { "r", "r", "0", "1", "rA", "r" } };
-
     switch (op) {
     case INDEX_op_goto_ptr:
-        return &r;
+        return C_O0_I1(r);
 
     case INDEX_op_ld8u_i32:
     case INDEX_op_ld8u_i64:
@@ -2308,6 +2292,8 @@ static const TCGTargetOpDef *tcg_target_op_def(TCGOpcode op)
     case INDEX_op_ld32u_i64:
     case INDEX_op_ld32s_i64:
     case INDEX_op_ld_i64:
+        return C_O1_I1(r, r);
+
     case INDEX_op_st8_i32:
     case INDEX_op_st8_i64:
     case INDEX_op_st16_i32:
@@ -2315,11 +2301,22 @@ static const TCGTargetOpDef *tcg_target_op_def(TCGOpcode op)
     case INDEX_op_st_i32:
     case INDEX_op_st32_i64:
     case INDEX_op_st_i64:
-        return &r_r;
+        return C_O0_I2(r, r);
 
     case INDEX_op_add_i32:
     case INDEX_op_add_i64:
-        return &r_r_ri;
+    case INDEX_op_shl_i64:
+    case INDEX_op_shr_i64:
+    case INDEX_op_sar_i64:
+    case INDEX_op_rotl_i32:
+    case INDEX_op_rotl_i64:
+    case INDEX_op_rotr_i32:
+    case INDEX_op_rotr_i64:
+    case INDEX_op_clz_i64:
+    case INDEX_op_setcond_i32:
+    case INDEX_op_setcond_i64:
+        return C_O1_I2(r, r, ri);
+
     case INDEX_op_sub_i32:
     case INDEX_op_sub_i64:
     case INDEX_op_and_i32:
@@ -2328,35 +2325,33 @@ static const TCGTargetOpDef *tcg_target_op_def(TCGOpcode op)
     case INDEX_op_or_i64:
     case INDEX_op_xor_i32:
     case INDEX_op_xor_i64:
-        return (s390_facilities & FACILITY_DISTINCT_OPS ? &r_r_ri : &r_0_ri);
+        return (s390_facilities & FACILITY_DISTINCT_OPS
+                ? C_O1_I2(r, r, ri)
+                : C_O1_I2(r, 0, ri));
 
     case INDEX_op_mul_i32:
         /* If we have the general-instruction-extensions, then we have
            MULTIPLY SINGLE IMMEDIATE with a signed 32-bit, otherwise we
            have only MULTIPLY HALFWORD IMMEDIATE, with a signed 16-bit.  */
-        return (s390_facilities & FACILITY_GEN_INST_EXT ? &r_0_ri : &r_0_rI);
+        return (s390_facilities & FACILITY_GEN_INST_EXT
+                ? C_O1_I2(r, 0, ri)
+                : C_O1_I2(r, 0, rI));
+
     case INDEX_op_mul_i64:
-        return (s390_facilities & FACILITY_GEN_INST_EXT ? &r_0_rJ : &r_0_rI);
+        return (s390_facilities & FACILITY_GEN_INST_EXT
+                ? C_O1_I2(r, 0, rJ)
+                : C_O1_I2(r, 0, rI));
 
     case INDEX_op_shl_i32:
     case INDEX_op_shr_i32:
     case INDEX_op_sar_i32:
-        return (s390_facilities & FACILITY_DISTINCT_OPS ? &r_r_ri : &r_0_ri);
-
-    case INDEX_op_shl_i64:
-    case INDEX_op_shr_i64:
-    case INDEX_op_sar_i64:
-        return &r_r_ri;
-
-    case INDEX_op_rotl_i32:
-    case INDEX_op_rotl_i64:
-    case INDEX_op_rotr_i32:
-    case INDEX_op_rotr_i64:
-        return &r_r_ri;
+        return (s390_facilities & FACILITY_DISTINCT_OPS
+                ? C_O1_I2(r, r, ri)
+                : C_O1_I2(r, 0, ri));
 
     case INDEX_op_brcond_i32:
     case INDEX_op_brcond_i64:
-        return &r_ri;
+        return C_O0_I2(r, ri);
 
     case INDEX_op_bswap16_i32:
     case INDEX_op_bswap16_i64:
@@ -2379,63 +2374,49 @@ static const TCGTargetOpDef *tcg_target_op_def(TCGOpcode op)
     case INDEX_op_extu_i32_i64:
     case INDEX_op_extract_i32:
     case INDEX_op_extract_i64:
-        return &r_r;
-
-    case INDEX_op_clz_i64:
-    case INDEX_op_setcond_i32:
-    case INDEX_op_setcond_i64:
-        return &r_r_ri;
+        return C_O1_I1(r, r);
 
     case INDEX_op_qemu_ld_i32:
     case INDEX_op_qemu_ld_i64:
-        return &r_L;
+        return C_O1_I1(r, L);
     case INDEX_op_qemu_st_i64:
     case INDEX_op_qemu_st_i32:
-        return &L_L;
+        return C_O0_I2(L, L);
 
     case INDEX_op_deposit_i32:
     case INDEX_op_deposit_i64:
-        {
-            static const TCGTargetOpDef dep
-                = { .args_ct_str = { "r", "rZ", "r" } };
-            return &dep;
-        }
+        return C_O1_I2(r, rZ, r);
+
     case INDEX_op_movcond_i32:
     case INDEX_op_movcond_i64:
-        {
-            static const TCGTargetOpDef movc
-                = { .args_ct_str = { "r", "r", "ri", "r", "0" } };
-            static const TCGTargetOpDef movc_l
-                = { .args_ct_str = { "r", "r", "ri", "rI", "0" } };
-            return (s390_facilities & FACILITY_LOAD_ON_COND2 ? &movc_l : &movc);
-        }
+        return (s390_facilities & FACILITY_LOAD_ON_COND2
+                ? C_O1_I4(r, r, ri, rI, 0)
+                : C_O1_I4(r, r, ri, r, 0));
+
     case INDEX_op_div2_i32:
     case INDEX_op_div2_i64:
     case INDEX_op_divu2_i32:
     case INDEX_op_divu2_i64:
-        {
-            static const TCGTargetOpDef div2
-                = { .args_ct_str = { "b", "a", "0", "1", "r" } };
-            return &div2;
-        }
+        return C_O2_I3(b, a, 0, 1, r);
+
     case INDEX_op_mulu2_i64:
-        {
-            static const TCGTargetOpDef mul2
-                = { .args_ct_str = { "b", "a", "0", "r" } };
-            return &mul2;
-        }
+        return C_O2_I2(b, a, 0, r);
 
     case INDEX_op_add2_i32:
     case INDEX_op_sub2_i32:
-        return (s390_facilities & FACILITY_EXT_IMM ? &a2_ri : &a2_r);
+        return (s390_facilities & FACILITY_EXT_IMM
+                ? C_O2_I4(r, r, 0, 1, ri, r)
+                : C_O2_I4(r, r, 0, 1, r, r));
+
     case INDEX_op_add2_i64:
     case INDEX_op_sub2_i64:
-        return (s390_facilities & FACILITY_EXT_IMM ? &a2_rA : &a2_r);
+        return (s390_facilities & FACILITY_EXT_IMM
+                ? C_O2_I4(r, r, 0, 1, rA, r)
+                : C_O2_I4(r, r, 0, 1, r, r));
 
     default:
-        break;
+        g_assert_not_reached();
     }
-    return NULL;
 }
 
 static void query_s390_facilities(void)
