diff --git a/tcg/i386/tcg-target-constr.h b/tcg/i386/tcg-target-constr.h
new file mode 100644
index 0000000000..91d394612e
--- /dev/null
+++ b/tcg/i386/tcg-target-constr.h
@@ -0,0 +1,55 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * i386 target-specific operand constaints.
+ * Copyright (c) 2020 Linaro
+ */
+
+C_O0_I1(r)
+
+C_O0_I2(qi, r)
+C_O0_I2(ri, r)
+C_O0_I2(re, r)
+C_O0_I2(r, re)
+C_O0_I2(L, L)
+C_O0_I2(x, r)
+
+C_O0_I3(L, L, L)
+
+C_O0_I4(L, L, L, L)
+C_O0_I4(r, r, ri, ri)
+
+C_O1_I1(r, 0)
+C_O1_I1(r, q)
+C_O1_I1(r, r)
+C_O1_I1(r, L)
+C_O1_I1(x, r)
+C_O1_I1(x, x)
+
+C_O1_I2(r, r, re)
+C_O1_I2(r, 0, r)
+C_O1_I2(r, 0, re)
+C_O1_I2(r, 0, reZ)
+C_O1_I2(r, 0, rI)
+C_O1_I2(r, 0, ri)
+C_O1_I2(r, 0, ci)
+C_O1_I2(r, r, ri)
+C_O1_I2(Q, 0, Q)
+C_O1_I2(q, r, re)
+C_O1_I2(r, L, L)
+C_O1_I2(x, x, x)
+C_N1_I2(r, r, r)
+C_N1_I2(r, r, rW)
+
+C_O1_I3(x, x, x, x)
+
+C_O1_I4(r, r, re, r, 0)
+C_O1_I4(r, r, r, ri, ri)
+
+C_O2_I1(r, r, L)
+
+C_O2_I2(r, r, L, L)
+C_O2_I2(a, d, a, r)
+
+C_O2_I3(a, d, 0, 1, r)
+
+C_O2_I4(r, r, 0, 1, re, re)
diff --git a/tcg/i386/tcg-target.c.inc b/tcg/i386/tcg-target.c.inc
index 36a90e7ef3..1dac1b33d1 100644
--- a/tcg/i386/tcg-target.c.inc
+++ b/tcg/i386/tcg-target.c.inc
@@ -2983,39 +2983,14 @@ static void tcg_out_vec_op(TCGContext *s, TCGOpcode opc,
     }
 }
 
+/* Define all constraint sets. */
+#include "../tcg-constr.c.inc"
+
 static const TCGTargetOpDef *tcg_target_op_def(TCGOpcode op)
 {
-    static const TCGTargetOpDef r = { .args_ct_str = { "r" } };
-    static const TCGTargetOpDef ri_r = { .args_ct_str = { "ri", "r" } };
-    static const TCGTargetOpDef re_r = { .args_ct_str = { "re", "r" } };
-    static const TCGTargetOpDef qi_r = { .args_ct_str = { "qi", "r" } };
-    static const TCGTargetOpDef r_r = { .args_ct_str = { "r", "r" } };
-    static const TCGTargetOpDef r_q = { .args_ct_str = { "r", "q" } };
-    static const TCGTargetOpDef r_re = { .args_ct_str = { "r", "re" } };
-    static const TCGTargetOpDef r_0 = { .args_ct_str = { "r", "0" } };
-    static const TCGTargetOpDef r_r_ri = { .args_ct_str = { "r", "r", "ri" } };
-    static const TCGTargetOpDef r_r_re = { .args_ct_str = { "r", "r", "re" } };
-    static const TCGTargetOpDef r_0_r = { .args_ct_str = { "r", "0", "r" } };
-    static const TCGTargetOpDef r_0_re = { .args_ct_str = { "r", "0", "re" } };
-    static const TCGTargetOpDef r_0_ci = { .args_ct_str = { "r", "0", "ci" } };
-    static const TCGTargetOpDef r_L = { .args_ct_str = { "r", "L" } };
-    static const TCGTargetOpDef L_L = { .args_ct_str = { "L", "L" } };
-    static const TCGTargetOpDef r_L_L = { .args_ct_str = { "r", "L", "L" } };
-    static const TCGTargetOpDef r_r_L = { .args_ct_str = { "r", "r", "L" } };
-    static const TCGTargetOpDef L_L_L = { .args_ct_str = { "L", "L", "L" } };
-    static const TCGTargetOpDef r_r_L_L
-        = { .args_ct_str = { "r", "r", "L", "L" } };
-    static const TCGTargetOpDef L_L_L_L
-        = { .args_ct_str = { "L", "L", "L", "L" } };
-    static const TCGTargetOpDef x_x = { .args_ct_str = { "x", "x" } };
-    static const TCGTargetOpDef x_x_x = { .args_ct_str = { "x", "x", "x" } };
-    static const TCGTargetOpDef x_x_x_x
-        = { .args_ct_str = { "x", "x", "x", "x" } };
-    static const TCGTargetOpDef x_r = { .args_ct_str = { "x", "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:
@@ -3029,22 +3004,25 @@ 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 &r_r;
+        return C_O1_I1(r, r);
 
     case INDEX_op_st8_i32:
     case INDEX_op_st8_i64:
-        return &qi_r;
+        return C_O0_I2(qi, r);
+
     case INDEX_op_st16_i32:
     case INDEX_op_st16_i64:
     case INDEX_op_st_i32:
     case INDEX_op_st32_i64:
-        return &ri_r;
+        return C_O0_I2(ri, r);
+
     case INDEX_op_st_i64:
-        return &re_r;
+        return C_O0_I2(re, r);
 
     case INDEX_op_add_i32:
     case INDEX_op_add_i64:
-        return &r_r_re;
+        return C_O1_I2(r, r, re);
+
     case INDEX_op_sub_i32:
     case INDEX_op_sub_i64:
     case INDEX_op_mul_i32:
@@ -3053,24 +3031,15 @@ 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 &r_0_re;
+        return C_O1_I2(r, 0, re);
 
     case INDEX_op_and_i32:
     case INDEX_op_and_i64:
-        {
-            static const TCGTargetOpDef and
-                = { .args_ct_str = { "r", "0", "reZ" } };
-            return &and;
-        }
-        break;
+        return C_O1_I2(r, 0, reZ);
+
     case INDEX_op_andc_i32:
     case INDEX_op_andc_i64:
-        {
-            static const TCGTargetOpDef andc
-                = { .args_ct_str = { "r", "r", "rI" } };
-            return &andc;
-        }
-        break;
+        return C_O1_I2(r, 0, rI);
 
     case INDEX_op_shl_i32:
     case INDEX_op_shl_i64:
@@ -3078,16 +3047,17 @@ static const TCGTargetOpDef *tcg_target_op_def(TCGOpcode op)
     case INDEX_op_shr_i64:
     case INDEX_op_sar_i32:
     case INDEX_op_sar_i64:
-        return have_bmi2 ? &r_r_ri : &r_0_ci;
+        return have_bmi2 ? C_O1_I2(r, r, ri) : C_O1_I2(r, 0, ci);
+
     case INDEX_op_rotl_i32:
     case INDEX_op_rotl_i64:
     case INDEX_op_rotr_i32:
     case INDEX_op_rotr_i64:
-        return &r_0_ci;
+        return C_O1_I2(r, 0, ci);
 
     case INDEX_op_brcond_i32:
     case INDEX_op_brcond_i64:
-        return &r_re;
+        return C_O0_I2(r, re);
 
     case INDEX_op_bswap16_i32:
     case INDEX_op_bswap16_i64:
@@ -3099,13 +3069,14 @@ static const TCGTargetOpDef *tcg_target_op_def(TCGOpcode op)
     case INDEX_op_not_i32:
     case INDEX_op_not_i64:
     case INDEX_op_extrh_i64_i32:
-        return &r_0;
+        return C_O1_I1(r, 0);
 
     case INDEX_op_ext8s_i32:
     case INDEX_op_ext8s_i64:
     case INDEX_op_ext8u_i32:
     case INDEX_op_ext8u_i64:
-        return &r_q;
+        return C_O1_I1(r, q);
+
     case INDEX_op_ext16s_i32:
     case INDEX_op_ext16s_i64:
     case INDEX_op_ext16u_i32:
@@ -3120,108 +3091,80 @@ static const TCGTargetOpDef *tcg_target_op_def(TCGOpcode op)
     case INDEX_op_sextract_i32:
     case INDEX_op_ctpop_i32:
     case INDEX_op_ctpop_i64:
-        return &r_r;
+        return C_O1_I1(r, r);
+
     case INDEX_op_extract2_i32:
     case INDEX_op_extract2_i64:
-        return &r_0_r;
+        return C_O1_I2(r, 0, r);
 
     case INDEX_op_deposit_i32:
     case INDEX_op_deposit_i64:
-        {
-            static const TCGTargetOpDef dep
-                = { .args_ct_str = { "Q", "0", "Q" } };
-            return &dep;
-        }
+        return C_O1_I2(Q, 0, Q);
+
     case INDEX_op_setcond_i32:
     case INDEX_op_setcond_i64:
-        {
-            static const TCGTargetOpDef setc
-                = { .args_ct_str = { "q", "r", "re" } };
-            return &setc;
-        }
+        return C_O1_I2(q, r, re);
+
     case INDEX_op_movcond_i32:
     case INDEX_op_movcond_i64:
-        {
-            static const TCGTargetOpDef movc
-                = { .args_ct_str = { "r", "r", "re", "r", "0" } };
-            return &movc;
-        }
+        return C_O1_I4(r, r, re, 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 = { "a", "d", "0", "1", "r" } };
-            return &div2;
-        }
+        return C_O2_I3(a, d, 0, 1, r);
+
     case INDEX_op_mulu2_i32:
     case INDEX_op_mulu2_i64:
     case INDEX_op_muls2_i32:
     case INDEX_op_muls2_i64:
-        {
-            static const TCGTargetOpDef mul2
-                = { .args_ct_str = { "a", "d", "a", "r" } };
-            return &mul2;
-        }
+        return C_O2_I2(a, d, a, r);
+
     case INDEX_op_add2_i32:
     case INDEX_op_add2_i64:
     case INDEX_op_sub2_i32:
     case INDEX_op_sub2_i64:
-        {
-            static const TCGTargetOpDef arith2
-                = { .args_ct_str = { "r", "r", "0", "1", "re", "re" } };
-            return &arith2;
-        }
+        return C_O2_I4(r, r, 0, 1, re, re);
+
     case INDEX_op_ctz_i32:
     case INDEX_op_ctz_i64:
-        {
-            static const TCGTargetOpDef ctz[2] = {
-                { .args_ct_str = { "&r", "r", "r" } },
-                { .args_ct_str = { "&r", "r", "rW" } },
-            };
-            return &ctz[have_bmi1];
-        }
+        return have_bmi1 ? C_N1_I2(r, r, rW) : C_N1_I2(r, r, r);
+
     case INDEX_op_clz_i32:
     case INDEX_op_clz_i64:
-        {
-            static const TCGTargetOpDef clz[2] = {
-                { .args_ct_str = { "&r", "r", "r" } },
-                { .args_ct_str = { "&r", "r", "rW" } },
-            };
-            return &clz[have_lzcnt];
-        }
+        return have_lzcnt ? C_N1_I2(r, r, rW) : C_N1_I2(r, r, r);
 
     case INDEX_op_qemu_ld_i32:
-        return TARGET_LONG_BITS <= TCG_TARGET_REG_BITS ? &r_L : &r_L_L;
+        return (TARGET_LONG_BITS <= TCG_TARGET_REG_BITS
+                ? C_O1_I1(r, L) : C_O1_I2(r, L, L));
+
     case INDEX_op_qemu_st_i32:
-        return TARGET_LONG_BITS <= TCG_TARGET_REG_BITS ? &L_L : &L_L_L;
+        return (TARGET_LONG_BITS <= TCG_TARGET_REG_BITS
+                ? C_O0_I2(L, L) : C_O0_I3(L, L, L));
+
     case INDEX_op_qemu_ld_i64:
-        return (TCG_TARGET_REG_BITS == 64 ? &r_L
-                : TARGET_LONG_BITS <= TCG_TARGET_REG_BITS ? &r_r_L
-                : &r_r_L_L);
+        return (TCG_TARGET_REG_BITS == 64 ? C_O1_I1(r, L)
+                : TARGET_LONG_BITS <= TCG_TARGET_REG_BITS ? C_O2_I1(r, r, L)
+                : C_O2_I2(r, r, L, L));
+
     case INDEX_op_qemu_st_i64:
-        return (TCG_TARGET_REG_BITS == 64 ? &L_L
-                : TARGET_LONG_BITS <= TCG_TARGET_REG_BITS ? &L_L_L
-                : &L_L_L_L);
+        return (TCG_TARGET_REG_BITS == 64 ? C_O0_I2(L, L)
+                : TARGET_LONG_BITS <= TCG_TARGET_REG_BITS ? C_O0_I3(L, L, L)
+                : C_O0_I4(L, L, L, L));
 
     case INDEX_op_brcond2_i32:
-        {
-            static const TCGTargetOpDef b2
-                = { .args_ct_str = { "r", "r", "ri", "ri" } };
-            return &b2;
-        }
+        return C_O0_I4(r, r, ri, ri);
+
     case INDEX_op_setcond2_i32:
-        {
-            static const TCGTargetOpDef s2
-                = { .args_ct_str = { "r", "r", "r", "ri", "ri" } };
-            return &s2;
-        }
+        return C_O1_I4(r, r, r, ri, ri);
 
     case INDEX_op_ld_vec:
-    case INDEX_op_st_vec:
     case INDEX_op_dupm_vec:
-        return &x_r;
+        return C_O1_I1(x, r);
+
+    case INDEX_op_st_vec:
+        return C_O0_I2(x, r);
 
     case INDEX_op_add_vec:
     case INDEX_op_sub_vec:
@@ -3256,16 +3199,18 @@ static const TCGTargetOpDef *tcg_target_op_def(TCGOpcode op)
 #if TCG_TARGET_REG_BITS == 32
     case INDEX_op_dup2_vec:
 #endif
-        return &x_x_x;
+        return C_O1_I2(x, x, x);
+
     case INDEX_op_abs_vec:
     case INDEX_op_dup_vec:
     case INDEX_op_shli_vec:
     case INDEX_op_shri_vec:
     case INDEX_op_sari_vec:
     case INDEX_op_x86_psrldq_vec:
-        return &x_x;
+        return C_O1_I1(x, x);
+
     case INDEX_op_x86_vpblendvb_vec:
-        return &x_x_x_x;
+        return C_O1_I3(x, x, x, x);
 
     default:
         break;
