armemu: Fix missing Q flag check for SMLSD.

src/core/arm/interpreter/armemu.cpp

@@ -6480,9 +6480,13 @@ L_stm_s_takeabort:
                 // SMUSD and SMLSD
                 else {
                     state->Reg[rd_idx] = product1 - product2;
-                    
-                    if (BITS(12, 15) != 15)
+
+                    if (BITS(12, 15) != 15) {
                         state->Reg[rd_idx] += state->Reg[ra_idx];
+
+                        if (ARMul_AddOverflowQ(product1 - product2, state->Reg[ra_idx]))
+                            SETQ;
+                    }
                 }
 
                 return 1;