diff --git a/src/common/fp/process_nan.cpp b/src/common/fp/process_nan.cpp
index 13d09a0f..389ec147 100644
--- a/src/common/fp/process_nan.cpp
+++ b/src/common/fp/process_nan.cpp
@@ -4,6 +4,8 @@
  * General Public License version 2 or any later version.
  */
 
+#include <boost/optional.hpp>
+
 #include "common/assert.h"
 #include "common/bit_util.h"
 #include "common/fp/fpcr.h"
@@ -38,4 +40,30 @@ FPT FPProcessNaN(FPType type, FPT op, FPCR fpcr, FPSR& fpsr) {
 template u32 FPProcessNaN<u32>(FPType type, u32 op, FPCR fpcr, FPSR& fpsr);
 template u64 FPProcessNaN<u64>(FPType type, u64 op, FPCR fpcr, FPSR& fpsr);
 
+template<typename FPT>
+boost::optional<FPT> FPProcessNaNs3(FPType type1, FPType type2, FPType type3, FPT op1, FPT op2, FPT op3, FPCR fpcr, FPSR& fpsr) {
+    if (type1 == FPType::SNaN) {
+        return FPProcessNaN<FPT>(type1, op1, fpcr, fpsr);
+    }
+    if (type2 == FPType::SNaN) {
+        return FPProcessNaN<FPT>(type2, op2, fpcr, fpsr);
+    }
+    if (type3 == FPType::SNaN) {
+        return FPProcessNaN<FPT>(type3, op3, fpcr, fpsr);
+    }
+    if (type1 == FPType::QNaN) {
+        return FPProcessNaN<FPT>(type1, op1, fpcr, fpsr);
+    }
+    if (type2 == FPType::QNaN) {
+        return FPProcessNaN<FPT>(type2, op2, fpcr, fpsr);
+    }
+    if (type3 == FPType::QNaN) {
+        return FPProcessNaN<FPT>(type3, op3, fpcr, fpsr);
+    }
+    return boost::none;
+}
+
+template boost::optional<u32> FPProcessNaNs3<u32>(FPType type1, FPType type2, FPType type3, u32 op1, u32 op2, u32 op3, FPCR fpcr, FPSR& fpsr);
+template boost::optional<u64> FPProcessNaNs3<u64>(FPType type1, FPType type2, FPType type3, u64 op1, u64 op2, u64 op3, FPCR fpcr, FPSR& fpsr);
+
 } // namespace Dynarmic::FP 
diff --git a/src/common/fp/process_nan.h b/src/common/fp/process_nan.h
index 848b49dd..4cd187bb 100644
--- a/src/common/fp/process_nan.h
+++ b/src/common/fp/process_nan.h
@@ -6,6 +6,8 @@
 
 #pragma once
 
+#include <boost/optional.hpp>
+
 namespace Dynarmic::FP {
 
 class FPCR;
@@ -15,4 +17,7 @@ enum class FPType;
 template<typename FPT>
 FPT FPProcessNaN(FPType type, FPT op, FPCR fpcr, FPSR& fpsr);
 
+template<typename FPT>
+boost::optional<FPT> FPProcessNaNs3(FPType type1, FPType type2, FPType type3, FPT op1, FPT op2, FPT op3, FPCR fpcr, FPSR& fpsr);
+
 } // namespace Dynarmic::FP