diff --git a/tcg/aarch64/tcg-target.c b/tcg/aarch64/tcg-target.c
index b3be6f31773..fe44ad709c5 100644
--- a/tcg/aarch64/tcg-target.c
+++ b/tcg/aarch64/tcg-target.c
@@ -1004,7 +1004,7 @@ static void tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *lb)
     tcg_out_mov(s, TARGET_LONG_BITS == 64, TCG_REG_X1, lb->addrlo_reg);
     tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_X2, oi);
     tcg_out_adr(s, TCG_REG_X3, lb->raddr);
-    tcg_out_call(s, qemu_ld_helpers[opc & ~MO_SIGN]);
+    tcg_out_call(s, qemu_ld_helpers[opc & (MO_BSWAP | MO_SIZE)]);
     if (opc & MO_SIGN) {
         tcg_out_sxt(s, lb->type, size, lb->datalo_reg, TCG_REG_X0);
     } else {
@@ -1027,7 +1027,7 @@ static void tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *lb)
     tcg_out_mov(s, size == MO_64, TCG_REG_X2, lb->datalo_reg);
     tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_X3, oi);
     tcg_out_adr(s, TCG_REG_X4, lb->raddr);
-    tcg_out_call(s, qemu_st_helpers[opc]);
+    tcg_out_call(s, qemu_st_helpers[opc & (MO_BSWAP | MO_SIZE)]);
     tcg_out_goto(s, lb->raddr);
 }
 
diff --git a/tcg/arm/tcg-target.c b/tcg/arm/tcg-target.c
index 06a8064a9fe..ae2ec7a9229 100644
--- a/tcg/arm/tcg-target.c
+++ b/tcg/arm/tcg-target.c
@@ -1260,9 +1260,9 @@ static void tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *lb)
        icache usage.  For pre-armv6, use the signed helpers since we do
        not have a single insn sign-extend.  */
     if (use_armv6_instructions) {
-        func = qemu_ld_helpers[opc & ~MO_SIGN];
+        func = qemu_ld_helpers[opc & (MO_BSWAP | MO_SIZE)];
     } else {
-        func = qemu_ld_helpers[opc];
+        func = qemu_ld_helpers[opc & (MO_BSWAP | MO_SSIZE)];
         if (opc & MO_SIGN) {
             opc = MO_UL;
         }
@@ -1337,7 +1337,7 @@ static void tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *lb)
     argreg = tcg_out_arg_reg32(s, argreg, TCG_REG_R14);
 
     /* Tail-call to the helper, which will return to the fast path.  */
-    tcg_out_goto(s, COND_AL, qemu_st_helpers[opc]);
+    tcg_out_goto(s, COND_AL, qemu_st_helpers[opc & (MO_BSWAP | MO_SIZE)]);
 }
 #endif /* SOFTMMU */
 
diff --git a/tcg/i386/tcg-target.c b/tcg/i386/tcg-target.c
index 2e4bf52aae8..ff4d9cfec7a 100644
--- a/tcg/i386/tcg-target.c
+++ b/tcg/i386/tcg-target.c
@@ -1307,7 +1307,7 @@ static void tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l)
                      (uintptr_t)l->raddr);
     }
 
-    tcg_out_call(s, qemu_ld_helpers[opc & ~MO_SIGN]);
+    tcg_out_call(s, qemu_ld_helpers[opc & (MO_BSWAP | MO_SIZE)]);
 
     data_reg = l->datalo_reg;
     switch (opc & MO_SSIZE) {
@@ -1413,7 +1413,7 @@ static void tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l)
 
     /* "Tail call" to the helper, with the return address back inline.  */
     tcg_out_push(s, retaddr);
-    tcg_out_jmp(s, qemu_st_helpers[opc]);
+    tcg_out_jmp(s, qemu_st_helpers[opc & (MO_BSWAP | MO_SIZE)]);
 }
 #elif defined(__x86_64__) && defined(__linux__)
 # include <asm/prctl.h>
diff --git a/tcg/mips/tcg-target.c b/tcg/mips/tcg-target.c
index f64c89c3c0a..f643eca3df4 100644
--- a/tcg/mips/tcg-target.c
+++ b/tcg/mips/tcg-target.c
@@ -1031,7 +1031,7 @@ static void tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l)
     }
     i = tcg_out_call_iarg_imm(s, i, oi);
     i = tcg_out_call_iarg_imm(s, i, (intptr_t)l->raddr);
-    tcg_out_call_int(s, qemu_ld_helpers[opc], false);
+    tcg_out_call_int(s, qemu_ld_helpers[opc & (MO_BSWAP | MO_SSIZE)], false);
     /* delay slot */
     tcg_out_mov(s, TCG_TYPE_PTR, tcg_target_call_iarg_regs[0], TCG_AREG0);
 
@@ -1094,7 +1094,7 @@ static void tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l)
        computation to take place in the return address register.  */
     tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_RA, (intptr_t)l->raddr);
     i = tcg_out_call_iarg_reg(s, i, TCG_REG_RA);
-    tcg_out_call_int(s, qemu_st_helpers[opc], true);
+    tcg_out_call_int(s, qemu_st_helpers[opc & (MO_BSWAP | MO_SIZE)], true);
     /* delay slot */
     tcg_out_mov(s, TCG_TYPE_PTR, tcg_target_call_iarg_regs[0], TCG_AREG0);
 }
diff --git a/tcg/ppc/tcg-target.c b/tcg/ppc/tcg-target.c
index d49c7d925f8..2b6eafa03c7 100644
--- a/tcg/ppc/tcg-target.c
+++ b/tcg/ppc/tcg-target.c
@@ -1495,7 +1495,7 @@ static void tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *lb)
     tcg_out_movi(s, TCG_TYPE_I32, arg++, oi);
     tcg_out32(s, MFSPR | RT(arg) | LR);
 
-    tcg_out_call(s, qemu_ld_helpers[opc & ~MO_SIGN]);
+    tcg_out_call(s, qemu_ld_helpers[opc & (MO_BSWAP | MO_SIZE)]);
 
     lo = lb->datalo_reg;
     hi = lb->datahi_reg;
@@ -1565,7 +1565,7 @@ static void tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *lb)
     tcg_out_movi(s, TCG_TYPE_I32, arg++, oi);
     tcg_out32(s, MFSPR | RT(arg) | LR);
 
-    tcg_out_call(s, qemu_st_helpers[opc]);
+    tcg_out_call(s, qemu_st_helpers[opc & (MO_BSWAP | MO_SIZE)]);
 
     tcg_out_b(s, 0, lb->raddr);
 }
@@ -1624,7 +1624,7 @@ static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, bool is_64)
             tcg_out32(s, LWZ | TAI(datalo, addrlo, 4));
         }
     } else {
-        uint32_t insn = qemu_ldx_opc[opc];
+        uint32_t insn = qemu_ldx_opc[opc & (MO_BSWAP | MO_SSIZE)];
         if (!HAVE_ISA_2_06 && insn == LDBRX) {
             tcg_out32(s, ADDI | TAI(TCG_REG_R0, addrlo, 4));
             tcg_out32(s, LWBRX | TAB(datalo, rbase, addrlo));
@@ -1696,7 +1696,7 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, bool is_64)
             tcg_out32(s, STW | TAI(datalo, addrlo, 4));
         }
     } else {
-        uint32_t insn = qemu_stx_opc[opc];
+        uint32_t insn = qemu_stx_opc[opc & (MO_BSWAP | MO_SIZE)];
         if (!HAVE_ISA_2_06 && insn == STDBRX) {
             tcg_out32(s, STWBRX | SAB(datalo, rbase, addrlo));
             tcg_out32(s, ADDI | TAI(TCG_REG_TMP1, addrlo, 4));
diff --git a/tcg/s390/tcg-target.c b/tcg/s390/tcg-target.c
index 46dedc9f82b..669fafe24f2 100644
--- a/tcg/s390/tcg-target.c
+++ b/tcg/s390/tcg-target.c
@@ -1573,7 +1573,7 @@ static void tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *lb)
     }
     tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_R4, oi);
     tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R5, (uintptr_t)lb->raddr);
-    tcg_out_call(s, qemu_ld_helpers[opc]);
+    tcg_out_call(s, qemu_ld_helpers[opc & (MO_BSWAP | MO_SSIZE)]);
     tcg_out_mov(s, TCG_TYPE_I64, data_reg, TCG_REG_R2);
 
     tgen_gotoi(s, S390_CC_ALWAYS, lb->raddr);
@@ -1610,7 +1610,7 @@ static void tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *lb)
     }
     tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_R5, oi);
     tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R6, (uintptr_t)lb->raddr);
-    tcg_out_call(s, qemu_st_helpers[opc]);
+    tcg_out_call(s, qemu_st_helpers[opc & (MO_BSWAP | MO_SIZE)]);
 
     tgen_gotoi(s, S390_CC_ALWAYS, lb->raddr);
 }
diff --git a/tcg/sparc/tcg-target.c b/tcg/sparc/tcg-target.c
index c1794a33edc..1a870a81d7f 100644
--- a/tcg/sparc/tcg-target.c
+++ b/tcg/sparc/tcg-target.c
@@ -1075,12 +1075,11 @@ static void tcg_out_qemu_ld(TCGContext *s, TCGReg data, TCGReg addr,
     TCGMemOp memop = get_memop(oi);
 #ifdef CONFIG_SOFTMMU
     unsigned memi = get_mmuidx(oi);
-    TCGMemOp s_bits = memop & MO_SIZE;
     TCGReg addrz, param;
     tcg_insn_unit *func;
     tcg_insn_unit *label_ptr;
 
-    addrz = tcg_out_tlb_load(s, addr, memi, s_bits,
+    addrz = tcg_out_tlb_load(s, addr, memi, memop & MO_SIZE,
                              offsetof(CPUTLBEntry, addr_read));
 
     /* The fast path is exactly one insn.  Thus we can perform the
@@ -1092,7 +1091,8 @@ static void tcg_out_qemu_ld(TCGContext *s, TCGReg data, TCGReg addr,
     tcg_out_bpcc0(s, COND_E, BPCC_A | BPCC_PT
                   | (TARGET_LONG_BITS == 64 ? BPCC_XCC : BPCC_ICC), 0);
     /* delay slot */
-    tcg_out_ldst_rr(s, data, addrz, TCG_REG_O1, qemu_ld_opc[memop]);
+    tcg_out_ldst_rr(s, data, addrz, TCG_REG_O1,
+                    qemu_ld_opc[memop & (MO_BSWAP | MO_SSIZE)]);
 
     /* TLB Miss.  */
 
@@ -1105,10 +1105,10 @@ static void tcg_out_qemu_ld(TCGContext *s, TCGReg data, TCGReg addr,
 
     /* We use the helpers to extend SB and SW data, leaving the case
        of SL needing explicit extending below.  */
-    if ((memop & ~MO_BSWAP) == MO_SL) {
-        func = qemu_ld_trampoline[memop & ~MO_SIGN];
+    if ((memop & MO_SSIZE) == MO_SL) {
+        func = qemu_ld_trampoline[memop & (MO_BSWAP | MO_SIZE)];
     } else {
-        func = qemu_ld_trampoline[memop];
+        func = qemu_ld_trampoline[memop & (MO_BSWAP | MO_SSIZE)];
     }
     assert(func != NULL);
     tcg_out_call_nodelay(s, func);
@@ -1119,13 +1119,13 @@ static void tcg_out_qemu_ld(TCGContext *s, TCGReg data, TCGReg addr,
        Which complicates things for sparcv8plus.  */
     if (SPARC64) {
         /* We let the helper sign-extend SB and SW, but leave SL for here.  */
-        if (is_64 && (memop & ~MO_BSWAP) == MO_SL) {
+        if (is_64 && (memop & MO_SSIZE) == MO_SL) {
             tcg_out_arithi(s, data, TCG_REG_O0, 0, SHIFT_SRA);
         } else {
             tcg_out_mov(s, TCG_TYPE_REG, data, TCG_REG_O0);
         }
     } else {
-        if (s_bits == MO_64) {
+        if ((memop & MO_SIZE) == MO_64) {
             tcg_out_arithi(s, TCG_REG_O0, TCG_REG_O0, 32, SHIFT_SLLX);
             tcg_out_arithi(s, TCG_REG_O1, TCG_REG_O1, 0, SHIFT_SRL);
             tcg_out_arith(s, data, TCG_REG_O0, TCG_REG_O1, ARITH_OR);
@@ -1147,7 +1147,7 @@ static void tcg_out_qemu_ld(TCGContext *s, TCGReg data, TCGReg addr,
     }
     tcg_out_ldst_rr(s, data, addr,
                     (GUEST_BASE ? TCG_GUEST_BASE_REG : TCG_REG_G0),
-                    qemu_ld_opc[memop]);
+                    qemu_ld_opc[memop & (MO_BSWAP | MO_SSIZE)]);
 #endif /* CONFIG_SOFTMMU */
 }
 
@@ -1157,12 +1157,11 @@ static void tcg_out_qemu_st(TCGContext *s, TCGReg data, TCGReg addr,
     TCGMemOp memop = get_memop(oi);
 #ifdef CONFIG_SOFTMMU
     unsigned memi = get_mmuidx(oi);
-    TCGMemOp s_bits = memop & MO_SIZE;
     TCGReg addrz, param;
     tcg_insn_unit *func;
     tcg_insn_unit *label_ptr;
 
-    addrz = tcg_out_tlb_load(s, addr, memi, s_bits,
+    addrz = tcg_out_tlb_load(s, addr, memi, memop & MO_SIZE,
                              offsetof(CPUTLBEntry, addr_write));
 
     /* The fast path is exactly one insn.  Thus we can perform the entire
@@ -1172,7 +1171,8 @@ static void tcg_out_qemu_st(TCGContext *s, TCGReg data, TCGReg addr,
     tcg_out_bpcc0(s, COND_E, BPCC_A | BPCC_PT
                   | (TARGET_LONG_BITS == 64 ? BPCC_XCC : BPCC_ICC), 0);
     /* delay slot */
-    tcg_out_ldst_rr(s, data, addrz, TCG_REG_O1, qemu_st_opc[memop]);
+    tcg_out_ldst_rr(s, data, addrz, TCG_REG_O1,
+                    qemu_st_opc[memop & (MO_BSWAP | MO_SIZE)]);
 
     /* TLB Miss.  */
 
@@ -1182,13 +1182,13 @@ static void tcg_out_qemu_st(TCGContext *s, TCGReg data, TCGReg addr,
         param++;
     }
     tcg_out_mov(s, TCG_TYPE_REG, param++, addr);
-    if (!SPARC64 && s_bits == MO_64) {
+    if (!SPARC64 && (memop & MO_SIZE) == MO_64) {
         /* Skip the high-part; we'll perform the extract in the trampoline.  */
         param++;
     }
     tcg_out_mov(s, TCG_TYPE_REG, param++, data);
 
-    func = qemu_st_trampoline[memop];
+    func = qemu_st_trampoline[memop & (MO_BSWAP | MO_SIZE)];
     assert(func != NULL);
     tcg_out_call_nodelay(s, func);
     /* delay slot */
@@ -1202,7 +1202,7 @@ static void tcg_out_qemu_st(TCGContext *s, TCGReg data, TCGReg addr,
     }
     tcg_out_ldst_rr(s, data, addr,
                     (GUEST_BASE ? TCG_GUEST_BASE_REG : TCG_REG_G0),
-                    qemu_st_opc[memop]);
+                    qemu_st_opc[memop & (MO_BSWAP | MO_SIZE)]);
 #endif /* CONFIG_SOFTMMU */
 }
 
diff --git a/tci.c b/tci.c
index a14717d0d57..84449489d22 100644
--- a/tci.c
+++ b/tci.c
@@ -1107,7 +1107,7 @@ uintptr_t tcg_qemu_tb_exec(CPUArchState *env, uint8_t *tb_ptr)
             t0 = *tb_ptr++;
             taddr = tci_read_ulong(&tb_ptr);
             oi = tci_read_i(&tb_ptr);
-            switch (get_memop(oi)) {
+            switch (get_memop(oi) & (MO_BSWAP | MO_SSIZE)) {
             case MO_UB:
                 tmp32 = qemu_ld_ub;
                 break;
@@ -1144,7 +1144,7 @@ uintptr_t tcg_qemu_tb_exec(CPUArchState *env, uint8_t *tb_ptr)
             }
             taddr = tci_read_ulong(&tb_ptr);
             oi = tci_read_i(&tb_ptr);
-            switch (get_memop(oi)) {
+            switch (get_memop(oi) & (MO_BSWAP | MO_SSIZE)) {
             case MO_UB:
                 tmp64 = qemu_ld_ub;
                 break;
@@ -1193,7 +1193,7 @@ uintptr_t tcg_qemu_tb_exec(CPUArchState *env, uint8_t *tb_ptr)
             t0 = tci_read_r(&tb_ptr);
             taddr = tci_read_ulong(&tb_ptr);
             oi = tci_read_i(&tb_ptr);
-            switch (get_memop(oi)) {
+            switch (get_memop(oi) & (MO_BSWAP | MO_SIZE)) {
             case MO_UB:
                 qemu_st_b(t0);
                 break;
@@ -1217,7 +1217,7 @@ uintptr_t tcg_qemu_tb_exec(CPUArchState *env, uint8_t *tb_ptr)
             tmp64 = tci_read_r64(&tb_ptr);
             taddr = tci_read_ulong(&tb_ptr);
             oi = tci_read_i(&tb_ptr);
-            switch (get_memop(oi)) {
+            switch (get_memop(oi) & (MO_BSWAP | MO_SIZE)) {
             case MO_UB:
                 qemu_st_b(tmp64);
                 break;