diff --git a/tcg/aarch64/tcg-target-has.h b/tcg/aarch64/tcg-target-has.h
index 2acc9bd3b7..240fcac2cc 100644
--- a/tcg/aarch64/tcg-target-has.h
+++ b/tcg/aarch64/tcg-target-has.h
@@ -19,7 +19,6 @@
 #define TCG_TARGET_HAS_bswap32_i32      1
 #define TCG_TARGET_HAS_not_i32          1
 #define TCG_TARGET_HAS_rot_i32          1
-#define TCG_TARGET_HAS_nor_i32          0
 #define TCG_TARGET_HAS_clz_i32          1
 #define TCG_TARGET_HAS_ctz_i32          1
 #define TCG_TARGET_HAS_ctpop_i32        0
@@ -41,7 +40,6 @@
 #define TCG_TARGET_HAS_bswap64_i64      1
 #define TCG_TARGET_HAS_not_i64          1
 #define TCG_TARGET_HAS_rot_i64          1
-#define TCG_TARGET_HAS_nor_i64          0
 #define TCG_TARGET_HAS_clz_i64          1
 #define TCG_TARGET_HAS_ctz_i64          1
 #define TCG_TARGET_HAS_ctpop_i64        0
diff --git a/tcg/arm/tcg-target-has.h b/tcg/arm/tcg-target-has.h
index 8d7b176993..e80711ee40 100644
--- a/tcg/arm/tcg-target-has.h
+++ b/tcg/arm/tcg-target-has.h
@@ -28,7 +28,6 @@ extern bool use_neon_instructions;
 #define TCG_TARGET_HAS_bswap32_i32      1
 #define TCG_TARGET_HAS_not_i32          1
 #define TCG_TARGET_HAS_rot_i32          1
-#define TCG_TARGET_HAS_nor_i32          0
 #define TCG_TARGET_HAS_clz_i32          1
 #define TCG_TARGET_HAS_ctz_i32          use_armv7_instructions
 #define TCG_TARGET_HAS_ctpop_i32        0
diff --git a/tcg/i386/tcg-target-has.h b/tcg/i386/tcg-target-has.h
index 93552f2337..b27f853dcd 100644
--- a/tcg/i386/tcg-target-has.h
+++ b/tcg/i386/tcg-target-has.h
@@ -31,7 +31,6 @@
 #define TCG_TARGET_HAS_bswap16_i32      1
 #define TCG_TARGET_HAS_bswap32_i32      1
 #define TCG_TARGET_HAS_not_i32          1
-#define TCG_TARGET_HAS_nor_i32          0
 #define TCG_TARGET_HAS_clz_i32          1
 #define TCG_TARGET_HAS_ctz_i32          1
 #define TCG_TARGET_HAS_ctpop_i32        have_popcnt
@@ -53,7 +52,6 @@
 #define TCG_TARGET_HAS_bswap32_i64      1
 #define TCG_TARGET_HAS_bswap64_i64      1
 #define TCG_TARGET_HAS_not_i64          1
-#define TCG_TARGET_HAS_nor_i64          0
 #define TCG_TARGET_HAS_clz_i64          1
 #define TCG_TARGET_HAS_ctz_i64          1
 #define TCG_TARGET_HAS_ctpop_i64        have_popcnt
diff --git a/tcg/loongarch64/tcg-target-has.h b/tcg/loongarch64/tcg-target-has.h
index 27e36e87ff..70bccdaa2e 100644
--- a/tcg/loongarch64/tcg-target-has.h
+++ b/tcg/loongarch64/tcg-target-has.h
@@ -25,7 +25,6 @@
 #define TCG_TARGET_HAS_bswap16_i32      1
 #define TCG_TARGET_HAS_bswap32_i32      1
 #define TCG_TARGET_HAS_not_i32          1
-#define TCG_TARGET_HAS_nor_i32          1
 #define TCG_TARGET_HAS_clz_i32          1
 #define TCG_TARGET_HAS_ctz_i32          1
 #define TCG_TARGET_HAS_ctpop_i32        0
@@ -45,7 +44,6 @@
 #define TCG_TARGET_HAS_bswap32_i64      1
 #define TCG_TARGET_HAS_bswap64_i64      1
 #define TCG_TARGET_HAS_not_i64          1
-#define TCG_TARGET_HAS_nor_i64          1
 #define TCG_TARGET_HAS_clz_i64          1
 #define TCG_TARGET_HAS_ctz_i64          1
 #define TCG_TARGET_HAS_ctpop_i64        0
diff --git a/tcg/mips/tcg-target-has.h b/tcg/mips/tcg-target-has.h
index 2f8325d56f..987f83f761 100644
--- a/tcg/mips/tcg-target-has.h
+++ b/tcg/mips/tcg-target-has.h
@@ -42,7 +42,6 @@ extern bool use_mips32r2_instructions;
 #define TCG_TARGET_HAS_div_i32          1
 #define TCG_TARGET_HAS_rem_i32          1
 #define TCG_TARGET_HAS_not_i32          1
-#define TCG_TARGET_HAS_nor_i32          1
 #define TCG_TARGET_HAS_mulu2_i32        (!use_mips32r6_instructions)
 #define TCG_TARGET_HAS_muls2_i32        (!use_mips32r6_instructions)
 #define TCG_TARGET_HAS_muluh_i32        1
@@ -58,7 +57,6 @@ extern bool use_mips32r2_instructions;
 #define TCG_TARGET_HAS_div_i64          1
 #define TCG_TARGET_HAS_rem_i64          1
 #define TCG_TARGET_HAS_not_i64          1
-#define TCG_TARGET_HAS_nor_i64          1
 #define TCG_TARGET_HAS_add2_i64         0
 #define TCG_TARGET_HAS_sub2_i64         0
 #define TCG_TARGET_HAS_mulu2_i64        (!use_mips32r6_instructions)
diff --git a/tcg/ppc/tcg-target-has.h b/tcg/ppc/tcg-target-has.h
index 810f20d120..6be6d7f994 100644
--- a/tcg/ppc/tcg-target-has.h
+++ b/tcg/ppc/tcg-target-has.h
@@ -23,7 +23,6 @@
 #define TCG_TARGET_HAS_bswap16_i32      1
 #define TCG_TARGET_HAS_bswap32_i32      1
 #define TCG_TARGET_HAS_not_i32          1
-#define TCG_TARGET_HAS_nor_i32          1
 #define TCG_TARGET_HAS_clz_i32          1
 #define TCG_TARGET_HAS_ctz_i32          have_isa_3_00
 #define TCG_TARGET_HAS_ctpop_i32        have_isa_2_06
@@ -46,7 +45,6 @@
 #define TCG_TARGET_HAS_bswap32_i64      1
 #define TCG_TARGET_HAS_bswap64_i64      1
 #define TCG_TARGET_HAS_not_i64          1
-#define TCG_TARGET_HAS_nor_i64          1
 #define TCG_TARGET_HAS_clz_i64          1
 #define TCG_TARGET_HAS_ctz_i64          have_isa_3_00
 #define TCG_TARGET_HAS_ctpop_i64        have_isa_2_06
diff --git a/tcg/riscv/tcg-target-has.h b/tcg/riscv/tcg-target-has.h
index 75a4f9149f..0c375e40bb 100644
--- a/tcg/riscv/tcg-target-has.h
+++ b/tcg/riscv/tcg-target-has.h
@@ -25,7 +25,6 @@
 #define TCG_TARGET_HAS_bswap16_i32      (cpuinfo & CPUINFO_ZBB)
 #define TCG_TARGET_HAS_bswap32_i32      (cpuinfo & CPUINFO_ZBB)
 #define TCG_TARGET_HAS_not_i32          1
-#define TCG_TARGET_HAS_nor_i32          0
 #define TCG_TARGET_HAS_clz_i32          (cpuinfo & CPUINFO_ZBB)
 #define TCG_TARGET_HAS_ctz_i32          (cpuinfo & CPUINFO_ZBB)
 #define TCG_TARGET_HAS_ctpop_i32        (cpuinfo & CPUINFO_ZBB)
@@ -44,7 +43,6 @@
 #define TCG_TARGET_HAS_bswap32_i64      (cpuinfo & CPUINFO_ZBB)
 #define TCG_TARGET_HAS_bswap64_i64      (cpuinfo & CPUINFO_ZBB)
 #define TCG_TARGET_HAS_not_i64          1
-#define TCG_TARGET_HAS_nor_i64          0
 #define TCG_TARGET_HAS_clz_i64          (cpuinfo & CPUINFO_ZBB)
 #define TCG_TARGET_HAS_ctz_i64          (cpuinfo & CPUINFO_ZBB)
 #define TCG_TARGET_HAS_ctpop_i64        (cpuinfo & CPUINFO_ZBB)
diff --git a/tcg/s390x/tcg-target-has.h b/tcg/s390x/tcg-target-has.h
index d8afd73814..374db3cf9d 100644
--- a/tcg/s390x/tcg-target-has.h
+++ b/tcg/s390x/tcg-target-has.h
@@ -34,7 +34,6 @@ extern uint64_t s390_facilities[3];
 #define TCG_TARGET_HAS_bswap16_i32    1
 #define TCG_TARGET_HAS_bswap32_i32    1
 #define TCG_TARGET_HAS_not_i32        HAVE_FACILITY(MISC_INSN_EXT3)
-#define TCG_TARGET_HAS_nor_i32        HAVE_FACILITY(MISC_INSN_EXT3)
 #define TCG_TARGET_HAS_clz_i32        0
 #define TCG_TARGET_HAS_ctz_i32        0
 #define TCG_TARGET_HAS_ctpop_i32      1
@@ -55,7 +54,6 @@ extern uint64_t s390_facilities[3];
 #define TCG_TARGET_HAS_bswap32_i64    1
 #define TCG_TARGET_HAS_bswap64_i64    1
 #define TCG_TARGET_HAS_not_i64        HAVE_FACILITY(MISC_INSN_EXT3)
-#define TCG_TARGET_HAS_nor_i64        HAVE_FACILITY(MISC_INSN_EXT3)
 #define TCG_TARGET_HAS_clz_i64        1
 #define TCG_TARGET_HAS_ctz_i64        0
 #define TCG_TARGET_HAS_ctpop_i64      1
diff --git a/tcg/sparc64/tcg-target-has.h b/tcg/sparc64/tcg-target-has.h
index 9bc0474107..35ae536879 100644
--- a/tcg/sparc64/tcg-target-has.h
+++ b/tcg/sparc64/tcg-target-has.h
@@ -20,7 +20,6 @@ extern bool use_vis3_instructions;
 #define TCG_TARGET_HAS_bswap16_i32      0
 #define TCG_TARGET_HAS_bswap32_i32      0
 #define TCG_TARGET_HAS_not_i32          1
-#define TCG_TARGET_HAS_nor_i32          0
 #define TCG_TARGET_HAS_clz_i32          0
 #define TCG_TARGET_HAS_ctz_i32          0
 #define TCG_TARGET_HAS_ctpop_i32        0
@@ -42,7 +41,6 @@ extern bool use_vis3_instructions;
 #define TCG_TARGET_HAS_bswap32_i64      0
 #define TCG_TARGET_HAS_bswap64_i64      0
 #define TCG_TARGET_HAS_not_i64          1
-#define TCG_TARGET_HAS_nor_i64          0
 #define TCG_TARGET_HAS_clz_i64          0
 #define TCG_TARGET_HAS_ctz_i64          0
 #define TCG_TARGET_HAS_ctpop_i64        0
diff --git a/tcg/tcg-has.h b/tcg/tcg-has.h
index e2a99067ac..7de13ef383 100644
--- a/tcg/tcg-has.h
+++ b/tcg/tcg-has.h
@@ -20,7 +20,6 @@
 #define TCG_TARGET_HAS_bswap32_i64      0
 #define TCG_TARGET_HAS_bswap64_i64      0
 #define TCG_TARGET_HAS_not_i64          0
-#define TCG_TARGET_HAS_nor_i64          0
 #define TCG_TARGET_HAS_clz_i64          0
 #define TCG_TARGET_HAS_ctz_i64          0
 #define TCG_TARGET_HAS_ctpop_i64        0
diff --git a/tcg/tci/tcg-target-has.h b/tcg/tci/tcg-target-has.h
index 8be70297f5..13c9dc3dfa 100644
--- a/tcg/tci/tcg-target-has.h
+++ b/tcg/tci/tcg-target-has.h
@@ -12,7 +12,6 @@
 #define TCG_TARGET_HAS_div_i32          1
 #define TCG_TARGET_HAS_rem_i32          1
 #define TCG_TARGET_HAS_extract2_i32     0
-#define TCG_TARGET_HAS_nor_i32          1
 #define TCG_TARGET_HAS_clz_i32          1
 #define TCG_TARGET_HAS_ctz_i32          1
 #define TCG_TARGET_HAS_ctpop_i32        1
@@ -32,7 +31,6 @@
 #define TCG_TARGET_HAS_extract2_i64     0
 #define TCG_TARGET_HAS_div_i64          1
 #define TCG_TARGET_HAS_rem_i64          1
-#define TCG_TARGET_HAS_nor_i64          1
 #define TCG_TARGET_HAS_clz_i64          1
 #define TCG_TARGET_HAS_ctz_i64          1
 #define TCG_TARGET_HAS_ctpop_i64        1
diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c
index 57782864fa..ac939bb4ea 100644
--- a/tcg/tcg-op.c
+++ b/tcg/tcg-op.c
@@ -700,7 +700,7 @@ void tcg_gen_nand_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
 
 void tcg_gen_nor_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
 {
-    if (TCG_TARGET_HAS_nor_i32) {
+    if (tcg_op_supported(INDEX_op_nor_i32, TCG_TYPE_I32, 0)) {
         tcg_gen_op3_i32(INDEX_op_nor_i32, ret, arg1, arg2);
     } else {
         tcg_gen_or_i32(ret, arg1, arg2);
@@ -2305,7 +2305,7 @@ void tcg_gen_nor_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
     if (TCG_TARGET_REG_BITS == 32) {
         tcg_gen_nor_i32(TCGV_LOW(ret), TCGV_LOW(arg1), TCGV_LOW(arg2));
         tcg_gen_nor_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), TCGV_HIGH(arg2));
-    } else if (TCG_TARGET_HAS_nor_i64) {
+    } else if (tcg_op_supported(INDEX_op_nor_i64, TCG_TYPE_I64, 0)) {
         tcg_gen_op3_i64(INDEX_op_nor_i64, ret, arg1, arg2);
     } else {
         tcg_gen_or_i64(ret, arg1, arg2);
diff --git a/tcg/tcg.c b/tcg/tcg.c
index c419cf4a16..85101b36c6 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -996,6 +996,8 @@ static const TCGOutOp * const all_outop[NB_OPS] = {
     OUTOP(INDEX_op_andc, TCGOutOpBinary, outop_andc),
     OUTOP(INDEX_op_eqv, TCGOutOpBinary, outop_eqv),
     OUTOP(INDEX_op_nand, TCGOutOpBinary, outop_nand),
+    OUTOP(INDEX_op_nor_i32, TCGOutOpBinary, outop_nor),
+    OUTOP(INDEX_op_nor_i64, TCGOutOpBinary, outop_nor),
     OUTOP(INDEX_op_or, TCGOutOpBinary, outop_or),
     OUTOP(INDEX_op_orc, TCGOutOpBinary, outop_orc),
     OUTOP(INDEX_op_xor, TCGOutOpBinary, outop_xor),
@@ -2275,8 +2277,6 @@ bool tcg_op_supported(TCGOpcode op, TCGType type, unsigned flags)
         return TCG_TARGET_HAS_bswap32_i32;
     case INDEX_op_not_i32:
         return TCG_TARGET_HAS_not_i32;
-    case INDEX_op_nor_i32:
-        return TCG_TARGET_HAS_nor_i32;
     case INDEX_op_clz_i32:
         return TCG_TARGET_HAS_clz_i32;
     case INDEX_op_ctz_i32:
@@ -2342,8 +2342,6 @@ bool tcg_op_supported(TCGOpcode op, TCGType type, unsigned flags)
         return TCG_TARGET_HAS_bswap64_i64;
     case INDEX_op_not_i64:
         return TCG_TARGET_HAS_not_i64;
-    case INDEX_op_nor_i64:
-        return TCG_TARGET_HAS_nor_i64;
     case INDEX_op_clz_i64:
         return TCG_TARGET_HAS_clz_i64;
     case INDEX_op_ctz_i64:
@@ -5419,6 +5417,8 @@ static void tcg_reg_alloc_op(TCGContext *s, const TCGOp *op)
     case INDEX_op_andc:
     case INDEX_op_eqv:
     case INDEX_op_nand:
+    case INDEX_op_nor_i32:
+    case INDEX_op_nor_i64:
     case INDEX_op_or:
     case INDEX_op_orc:
     case INDEX_op_xor:
diff --git a/tcg/tci.c b/tcg/tci.c
index 9d89ca0a6b..de3edcc8d2 100644
--- a/tcg/tci.c
+++ b/tcg/tci.c
@@ -573,12 +573,10 @@ uintptr_t QEMU_DISABLE_CFI tcg_qemu_tb_exec(CPUArchState *env,
             tci_args_rrr(insn, &r0, &r1, &r2);
             regs[r0] = ~(regs[r1] & regs[r2]);
             break;
-#if TCG_TARGET_HAS_nor_i32 || TCG_TARGET_HAS_nor_i64
         CASE_32_64(nor)
             tci_args_rrr(insn, &r0, &r1, &r2);
             regs[r0] = ~(regs[r1] | regs[r2]);
             break;
-#endif
 
             /* Arithmetic operations (32 bit). */
 
diff --git a/tcg/aarch64/tcg-target.c.inc b/tcg/aarch64/tcg-target.c.inc
index c2f97439b9..966af79314 100644
--- a/tcg/aarch64/tcg-target.c.inc
+++ b/tcg/aarch64/tcg-target.c.inc
@@ -2172,6 +2172,10 @@ static const TCGOutOpBinary outop_nand = {
     .base.static_constraint = C_NotImplemented,
 };
 
+static const TCGOutOpBinary outop_nor = {
+    .base.static_constraint = C_NotImplemented,
+};
+
 static void tgen_or(TCGContext *s, TCGType type,
                     TCGReg a0, TCGReg a1, TCGReg a2)
 {
diff --git a/tcg/arm/tcg-target.c.inc b/tcg/arm/tcg-target.c.inc
index 5ece4ad064..8e3448c7bd 100644
--- a/tcg/arm/tcg-target.c.inc
+++ b/tcg/arm/tcg-target.c.inc
@@ -1915,6 +1915,10 @@ static const TCGOutOpBinary outop_nand = {
     .base.static_constraint = C_NotImplemented,
 };
 
+static const TCGOutOpBinary outop_nor = {
+    .base.static_constraint = C_NotImplemented,
+};
+
 static void tgen_or(TCGContext *s, TCGType type,
                      TCGReg a0, TCGReg a1, TCGReg a2)
 {
diff --git a/tcg/i386/tcg-target.c.inc b/tcg/i386/tcg-target.c.inc
index a7310ffeff..47d0323426 100644
--- a/tcg/i386/tcg-target.c.inc
+++ b/tcg/i386/tcg-target.c.inc
@@ -2706,6 +2706,10 @@ static const TCGOutOpBinary outop_nand = {
     .base.static_constraint = C_NotImplemented,
 };
 
+static const TCGOutOpBinary outop_nor = {
+    .base.static_constraint = C_NotImplemented,
+};
+
 static void tgen_or(TCGContext *s, TCGType type,
                     TCGReg a0, TCGReg a1, TCGReg a2)
 {
diff --git a/tcg/loongarch64/tcg-target.c.inc b/tcg/loongarch64/tcg-target.c.inc
index 24d00af2ee..efc483a550 100644
--- a/tcg/loongarch64/tcg-target.c.inc
+++ b/tcg/loongarch64/tcg-target.c.inc
@@ -1331,6 +1331,17 @@ static const TCGOutOpBinary outop_nand = {
     .base.static_constraint = C_NotImplemented,
 };
 
+static void tgen_nor(TCGContext *s, TCGType type,
+                      TCGReg a0, TCGReg a1, TCGReg a2)
+{
+    tcg_out_opc_nor(s, a0, a1, a2);
+}
+
+static const TCGOutOpBinary outop_nor = {
+    .base.static_constraint = C_O1_I2(r, r, r),
+    .out_rrr = tgen_nor,
+};
+
 static void tgen_or(TCGContext *s, TCGType type,
                     TCGReg a0, TCGReg a1, TCGReg a2)
 {
@@ -1418,11 +1429,6 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc, TCGType type,
         tcg_out_opc_nor(s, a0, a1, TCG_REG_ZERO);
         break;
 
-    case INDEX_op_nor_i32:
-    case INDEX_op_nor_i64:
-        tcg_out_opc_nor(s, a0, a1, a2);
-        break;
-
     case INDEX_op_extract_i32:
         if (a2 == 0 && args[3] <= 12) {
             tcg_out_opc_andi(s, a0, a1, (1 << args[3]) - 1);
@@ -2320,10 +2326,6 @@ tcg_target_op_def(TCGOpcode op, TCGType type, unsigned flags)
     case INDEX_op_rotr_i64:
         return C_O1_I2(r, r, ri);
 
-    case INDEX_op_nor_i32:
-    case INDEX_op_nor_i64:
-        return C_O1_I2(r, r, r);
-
     case INDEX_op_clz_i32:
     case INDEX_op_clz_i64:
     case INDEX_op_ctz_i32:
diff --git a/tcg/mips/tcg-target.c.inc b/tcg/mips/tcg-target.c.inc
index a73bd3b6ed..3a039a805d 100644
--- a/tcg/mips/tcg-target.c.inc
+++ b/tcg/mips/tcg-target.c.inc
@@ -1743,6 +1743,17 @@ static const TCGOutOpBinary outop_nand = {
     .base.static_constraint = C_NotImplemented,
 };
 
+static void tgen_nor(TCGContext *s, TCGType type,
+                     TCGReg a0, TCGReg a1, TCGReg a2)
+{
+    tcg_out_opc_reg(s, OPC_NOR, a0, a1, a2);
+}
+
+static const TCGOutOpBinary outop_nor = {
+    .base.static_constraint = C_O1_I2(r, r, r),
+    .out_rrr = tgen_nor,
+};
+
 static void tgen_or(TCGContext *s, TCGType type,
                     TCGReg a0, TCGReg a1, TCGReg a2)
 {
@@ -1876,10 +1887,6 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc, TCGType type,
             break;
         }
         goto do_binaryv;
-    case INDEX_op_nor_i32:
-    case INDEX_op_nor_i64:
-        i1 = OPC_NOR;
-        goto do_binaryv;
 
     case INDEX_op_mul_i32:
         if (use_mips32_instructions) {
@@ -2291,7 +2298,6 @@ tcg_target_op_def(TCGOpcode op, TCGType type, unsigned flags)
     case INDEX_op_divu_i32:
     case INDEX_op_rem_i32:
     case INDEX_op_remu_i32:
-    case INDEX_op_nor_i32:
     case INDEX_op_setcond_i32:
     case INDEX_op_mul_i64:
     case INDEX_op_mulsh_i64:
@@ -2300,7 +2306,6 @@ tcg_target_op_def(TCGOpcode op, TCGType type, unsigned flags)
     case INDEX_op_divu_i64:
     case INDEX_op_rem_i64:
     case INDEX_op_remu_i64:
-    case INDEX_op_nor_i64:
     case INDEX_op_setcond_i64:
         return C_O1_I2(r, rZ, rZ);
     case INDEX_op_muls2_i32:
diff --git a/tcg/ppc/tcg-target.c.inc b/tcg/ppc/tcg-target.c.inc
index 72f38ff3f3..fe43583e8b 100644
--- a/tcg/ppc/tcg-target.c.inc
+++ b/tcg/ppc/tcg-target.c.inc
@@ -3014,6 +3014,17 @@ static const TCGOutOpBinary outop_nand = {
     .out_rrr = tgen_nand,
 };
 
+static void tgen_nor(TCGContext *s, TCGType type,
+                     TCGReg a0, TCGReg a1, TCGReg a2)
+{
+    tcg_out32(s, NOR | SAB(a1, a0, a2));
+}
+
+static const TCGOutOpBinary outop_nor = {
+    .base.static_constraint = C_O1_I2(r, r, r),
+    .out_rrr = tgen_nor,
+};
+
 static void tgen_or(TCGContext *s, TCGType type,
                     TCGReg a0, TCGReg a1, TCGReg a2)
 {
@@ -3146,11 +3157,6 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc, TCGType type,
         }
         break;
 
-    case INDEX_op_nor_i32:
-    case INDEX_op_nor_i64:
-        tcg_out32(s, NOR | SAB(args[1], args[0], args[2]));
-        break;
-
     case INDEX_op_clz_i32:
         tcg_out_cntxz(s, TCG_TYPE_I32, CNTLZW, args[0], args[1],
                       args[2], const_args[2]);
@@ -4253,10 +4259,8 @@ tcg_target_op_def(TCGOpcode op, TCGType type, unsigned flags)
     case INDEX_op_divu_i32:
     case INDEX_op_rem_i32:
     case INDEX_op_remu_i32:
-    case INDEX_op_nor_i32:
     case INDEX_op_muluh_i32:
     case INDEX_op_mulsh_i32:
-    case INDEX_op_nor_i64:
     case INDEX_op_div_i64:
     case INDEX_op_divu_i64:
     case INDEX_op_rem_i64:
diff --git a/tcg/riscv/tcg-target.c.inc b/tcg/riscv/tcg-target.c.inc
index ef6d337586..6d600a9940 100644
--- a/tcg/riscv/tcg-target.c.inc
+++ b/tcg/riscv/tcg-target.c.inc
@@ -2024,6 +2024,10 @@ static const TCGOutOpBinary outop_nand = {
     .base.static_constraint = C_NotImplemented,
 };
 
+static const TCGOutOpBinary outop_nor = {
+    .base.static_constraint = C_NotImplemented,
+};
+
 static void tgen_or(TCGContext *s, TCGType type,
                     TCGReg a0, TCGReg a1, TCGReg a2)
 {
diff --git a/tcg/s390x/tcg-target.c.inc b/tcg/s390x/tcg-target.c.inc
index 5bf2b0f455..3b55ec4ac8 100644
--- a/tcg/s390x/tcg-target.c.inc
+++ b/tcg/s390x/tcg-target.c.inc
@@ -2274,6 +2274,22 @@ static const TCGOutOpBinary outop_nand = {
     .out_rrr = tgen_nand,
 };
 
+static void tgen_nor(TCGContext *s, TCGType type,
+                      TCGReg a0, TCGReg a1, TCGReg a2)
+{
+    if (type == TCG_TYPE_I32) {
+        tcg_out_insn(s, RRFa, NORK, a0, a1, a2);
+    } else {
+        tcg_out_insn(s, RRFa, NOGRK, a0, a1, a2);
+    }
+}
+
+static const TCGOutOpBinary outop_nor = {
+    .base.static_constraint = C_Dynamic,
+    .base.dynamic_constraint = cset_misc3_rrr,
+    .out_rrr = tgen_nor,
+};
+
 static void tgen_or(TCGContext *s, TCGType type,
                      TCGReg a0, TCGReg a1, TCGReg a2)
 {
@@ -2408,10 +2424,6 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc, TCGType type,
         }
         break;
 
-    case INDEX_op_nor_i32:
-        tcg_out_insn(s, RRFa, NORK, args[0], args[1], args[2]);
-        break;
-
     case INDEX_op_neg_i32:
         tcg_out_insn(s, RR, LCR, args[0], args[1]);
         break;
@@ -2621,10 +2633,6 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc, TCGType type,
         }
         break;
 
-    case INDEX_op_nor_i64:
-        tcg_out_insn(s, RRFa, NOGRK, args[0], args[1], args[2]);
-        break;
-
     case INDEX_op_neg_i64:
         tcg_out_insn(s, RRE, LCGR, args[0], args[1]);
         break;
@@ -3304,10 +3312,6 @@ tcg_target_op_def(TCGOpcode op, TCGType type, unsigned flags)
     case INDEX_op_sub_i64:
         return C_O1_I2(r, r, ri);
 
-    case INDEX_op_nor_i32:
-    case INDEX_op_nor_i64:
-        return C_O1_I2(r, r, r);
-
     case INDEX_op_mul_i32:
         return (HAVE_FACILITY(MISC_INSN_EXT2)
                 ? C_O1_I2(r, r, ri)
diff --git a/tcg/sparc64/tcg-target.c.inc b/tcg/sparc64/tcg-target.c.inc
index 8e4929706b..06772166bd 100644
--- a/tcg/sparc64/tcg-target.c.inc
+++ b/tcg/sparc64/tcg-target.c.inc
@@ -1350,6 +1350,10 @@ static const TCGOutOpBinary outop_nand = {
     .base.static_constraint = C_NotImplemented,
 };
 
+static const TCGOutOpBinary outop_nor = {
+    .base.static_constraint = C_NotImplemented,
+};
+
 static void tgen_ori(TCGContext *s, TCGType type,
                       TCGReg a0, TCGReg a1, tcg_target_long a2)
 {
diff --git a/tcg/tci/tcg-target.c.inc b/tcg/tci/tcg-target.c.inc
index 97f6c12749..d66176a81d 100644
--- a/tcg/tci/tcg-target.c.inc
+++ b/tcg/tci/tcg-target.c.inc
@@ -95,8 +95,6 @@ tcg_target_op_def(TCGOpcode op, TCGType type, unsigned flags)
     case INDEX_op_sub_i64:
     case INDEX_op_mul_i32:
     case INDEX_op_mul_i64:
-    case INDEX_op_nor_i32:
-    case INDEX_op_nor_i64:
     case INDEX_op_shl_i32:
     case INDEX_op_shl_i64:
     case INDEX_op_shr_i32:
@@ -702,6 +700,17 @@ static const TCGOutOpBinary outop_nand = {
     .out_rrr = tgen_nand,
 };
 
+static void tgen_nor(TCGContext *s, TCGType type,
+                     TCGReg a0, TCGReg a1, TCGReg a2)
+{
+    tcg_out_op_rrr(s, glue(INDEX_op_nor_i,TCG_TARGET_REG_BITS), a0, a1, a2);
+}
+
+static const TCGOutOpBinary outop_nor = {
+    .base.static_constraint = C_O1_I2(r, r, r),
+    .out_rrr = tgen_nor,
+};
+
 static void tgen_or(TCGContext *s, TCGType type,
                      TCGReg a0, TCGReg a1, TCGReg a2)
 {
@@ -779,7 +788,6 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc, TCGType type,
 
     CASE_32_64(sub)
     CASE_32_64(mul)
-    CASE_32_64(nor)      /* Optional (TCG_TARGET_HAS_nor_*). */
     CASE_32_64(shl)
     CASE_32_64(shr)
     CASE_32_64(sar)
