diff --git a/Source/Core/Core/PowerPC/Jit64/Jit_Integer.cpp b/Source/Core/Core/PowerPC/Jit64/Jit_Integer.cpp
index 4aad4db4f6..5dda14184b 100644
--- a/Source/Core/Core/PowerPC/Jit64/Jit_Integer.cpp
+++ b/Source/Core/Core/PowerPC/Jit64/Jit_Integer.cpp
@@ -1063,42 +1063,46 @@ void Jit64::mullwx(UGeckoInstruction inst)
   JITDISABLE(bJITIntegerOff);
   int a = inst.RA, b = inst.RB, d = inst.RD;
 
-  if (gpr.R(a).IsImm() && gpr.R(b).IsImm())
+  if (gpr.IsImm(a, b))
   {
-    s32 i = gpr.R(a).SImm32(), j = gpr.R(b).SImm32();
+    s32 i = gpr.SImm32(a), j = gpr.SImm32(b);
     gpr.SetImmediate32(d, i * j);
     if (inst.OE)
       GenerateConstantOverflow((s64)i * (s64)j);
   }
+  else if (gpr.IsImm(a) || gpr.IsImm(b))
+  {
+    u32 imm = gpr.IsImm(a) ? gpr.Imm32(a) : gpr.Imm32(b);
+    int src = gpr.IsImm(a) ? b : a;
+    MultiplyImmediate(imm, src, d, inst.OE);
+    if (inst.OE)
+      GenerateOverflow();
+  }
   else
   {
-    gpr.Lock(a, b, d);
-    gpr.BindToRegister(d, (d == a || d == b), true);
-    /*if (gpr.R(a).IsImm() || gpr.R(b).IsImm())
+    RCOpArg Ra = gpr.Use(a, RCMode::Read);
+    RCOpArg Rb = gpr.Use(b, RCMode::Read);
+    RCX64Reg Rd = gpr.Bind(d, RCMode::Write);
+    RegCache::Realize(Ra, Rb, Rd);
+
+    if (d == a)
     {
-      u32 imm = gpr.R(a).IsImm() ? gpr.R(a).Imm32() : gpr.R(b).Imm32();
-      int src = gpr.R(a).IsImm() ? b : a;
-      MultiplyImmediate(imm, src, d, inst.OE);
-    }
-    else*/ if (d == a)
-    {
-      IMUL(32, gpr.RX(d), gpr.R(b));
+      IMUL(32, Rd, Rb);
     }
     else if (d == b)
     {
-      IMUL(32, gpr.RX(d), gpr.R(a));
+      IMUL(32, Rd, Ra);
     }
     else
     {
-      MOV(32, gpr.R(d), gpr.R(b));
-      IMUL(32, gpr.RX(d), gpr.R(a));
+      MOV(32, Rd, Rb);
+      IMUL(32, Rd, Ra);
     }
     if (inst.OE)
       GenerateOverflow();
   }
   if (inst.Rc)
-    ComputeRC(gpr.R(d));
-  gpr.UnlockAll();
+    ComputeRC(d);
 }
 
 void Jit64::mulhwXx(UGeckoInstruction inst)