diff --git a/FEXCore/Source/Interface/Core/JIT/Arm64/ALUOps.cpp b/FEXCore/Source/Interface/Core/JIT/Arm64/ALUOps.cpp
index d69adb51d..c21bbe535 100644
--- a/FEXCore/Source/Interface/Core/JIT/Arm64/ALUOps.cpp
+++ b/FEXCore/Source/Interface/Core/JIT/Arm64/ALUOps.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 tags: backend|arm64
diff --git a/FEXCore/Source/Interface/Core/JIT/Arm64/Arm64Relocations.cpp b/FEXCore/Source/Interface/Core/JIT/Arm64/Arm64Relocations.cpp
index 21f43fc97..f8c225f91 100644
--- a/FEXCore/Source/Interface/Core/JIT/Arm64/Arm64Relocations.cpp
+++ b/FEXCore/Source/Interface/Core/JIT/Arm64/Arm64Relocations.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 tags: backend|arm64
diff --git a/FEXCore/Source/Interface/Core/JIT/Arm64/AtomicOps.cpp b/FEXCore/Source/Interface/Core/JIT/Arm64/AtomicOps.cpp
index 8dbbe353c..4801c5f0c 100644
--- a/FEXCore/Source/Interface/Core/JIT/Arm64/AtomicOps.cpp
+++ b/FEXCore/Source/Interface/Core/JIT/Arm64/AtomicOps.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 tags: backend|arm64
diff --git a/FEXCore/Source/Interface/Core/JIT/Arm64/BranchOps.cpp b/FEXCore/Source/Interface/Core/JIT/Arm64/BranchOps.cpp
index e3085834f..ea9ca2fda 100644
--- a/FEXCore/Source/Interface/Core/JIT/Arm64/BranchOps.cpp
+++ b/FEXCore/Source/Interface/Core/JIT/Arm64/BranchOps.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 tags: backend|arm64
diff --git a/FEXCore/Source/Interface/Core/JIT/Arm64/ConversionOps.cpp b/FEXCore/Source/Interface/Core/JIT/Arm64/ConversionOps.cpp
index a44c4dbef..8a0f21846 100644
--- a/FEXCore/Source/Interface/Core/JIT/Arm64/ConversionOps.cpp
+++ b/FEXCore/Source/Interface/Core/JIT/Arm64/ConversionOps.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 tags: backend|arm64
diff --git a/FEXCore/Source/Interface/Core/JIT/Arm64/EncryptionOps.cpp b/FEXCore/Source/Interface/Core/JIT/Arm64/EncryptionOps.cpp
index 7a89085e4..c407947d0 100644
--- a/FEXCore/Source/Interface/Core/JIT/Arm64/EncryptionOps.cpp
+++ b/FEXCore/Source/Interface/Core/JIT/Arm64/EncryptionOps.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 tags: backend|arm64
diff --git a/FEXCore/Source/Interface/Core/JIT/Arm64/FlagOps.cpp b/FEXCore/Source/Interface/Core/JIT/Arm64/FlagOps.cpp
index e779549da..92ec9659b 100644
--- a/FEXCore/Source/Interface/Core/JIT/Arm64/FlagOps.cpp
+++ b/FEXCore/Source/Interface/Core/JIT/Arm64/FlagOps.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 tags: backend|arm64
diff --git a/FEXCore/Source/Interface/Core/JIT/Arm64/JIT.cpp b/FEXCore/Source/Interface/Core/JIT/Arm64/JIT.cpp
index 802a016d1..7bb97d281 100644
--- a/FEXCore/Source/Interface/Core/JIT/Arm64/JIT.cpp
+++ b/FEXCore/Source/Interface/Core/JIT/Arm64/JIT.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 glossary: Splatter ~ a code generator backend that concaternates configurable macros instead of doing isel
diff --git a/FEXCore/Source/Interface/Core/JIT/Arm64/JITClass.h b/FEXCore/Source/Interface/Core/JIT/Arm64/JITClass.h
index d980df372..4729ae3ea 100644
--- a/FEXCore/Source/Interface/Core/JIT/Arm64/JITClass.h
+++ b/FEXCore/Source/Interface/Core/JIT/Arm64/JITClass.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 tags: backend|arm64
diff --git a/FEXCore/Source/Interface/Core/JIT/Arm64/MemoryOps.cpp b/FEXCore/Source/Interface/Core/JIT/Arm64/MemoryOps.cpp
index c8b81cb26..11f3a5070 100644
--- a/FEXCore/Source/Interface/Core/JIT/Arm64/MemoryOps.cpp
+++ b/FEXCore/Source/Interface/Core/JIT/Arm64/MemoryOps.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 tags: backend|arm64
diff --git a/FEXCore/Source/Interface/Core/JIT/Arm64/MiscOps.cpp b/FEXCore/Source/Interface/Core/JIT/Arm64/MiscOps.cpp
index ca5758c9b..5ac96bf6e 100644
--- a/FEXCore/Source/Interface/Core/JIT/Arm64/MiscOps.cpp
+++ b/FEXCore/Source/Interface/Core/JIT/Arm64/MiscOps.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 tags: backend|arm64
diff --git a/FEXCore/Source/Interface/Core/JIT/Arm64/MoveOps.cpp b/FEXCore/Source/Interface/Core/JIT/Arm64/MoveOps.cpp
index 9c9a3f3c6..118be0ce0 100644
--- a/FEXCore/Source/Interface/Core/JIT/Arm64/MoveOps.cpp
+++ b/FEXCore/Source/Interface/Core/JIT/Arm64/MoveOps.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 tags: backend|arm64
diff --git a/FEXCore/Source/Interface/Core/JIT/Arm64/VectorOps.cpp b/FEXCore/Source/Interface/Core/JIT/Arm64/VectorOps.cpp
index 42fbe9517..3ff3a6f9f 100644
--- a/FEXCore/Source/Interface/Core/JIT/Arm64/VectorOps.cpp
+++ b/FEXCore/Source/Interface/Core/JIT/Arm64/VectorOps.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 tags: backend|arm64
diff --git a/FEXCore/Source/Interface/Core/JIT/JITCore.h b/FEXCore/Source/Interface/Core/JIT/JITCore.h
index 63b9d7f96..0d8062b9a 100644
--- a/FEXCore/Source/Interface/Core/JIT/JITCore.h
+++ b/FEXCore/Source/Interface/Core/JIT/JITCore.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 #pragma once
 
 #include <FEXCore/Core/CPUBackend.h>
diff --git a/FEXCore/Source/Interface/Core/JIT/x86_64/ALUOps.cpp b/FEXCore/Source/Interface/Core/JIT/x86_64/ALUOps.cpp
index 411403642..2a62e323a 100644
--- a/FEXCore/Source/Interface/Core/JIT/x86_64/ALUOps.cpp
+++ b/FEXCore/Source/Interface/Core/JIT/x86_64/ALUOps.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 tags: backend|x86-64
diff --git a/FEXCore/Source/Interface/Core/JIT/x86_64/AtomicOps.cpp b/FEXCore/Source/Interface/Core/JIT/x86_64/AtomicOps.cpp
index 000ceb76a..e43614451 100644
--- a/FEXCore/Source/Interface/Core/JIT/x86_64/AtomicOps.cpp
+++ b/FEXCore/Source/Interface/Core/JIT/x86_64/AtomicOps.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 tags: backend|x86-64
diff --git a/FEXCore/Source/Interface/Core/JIT/x86_64/BranchOps.cpp b/FEXCore/Source/Interface/Core/JIT/x86_64/BranchOps.cpp
index b1352b8ab..48b219399 100644
--- a/FEXCore/Source/Interface/Core/JIT/x86_64/BranchOps.cpp
+++ b/FEXCore/Source/Interface/Core/JIT/x86_64/BranchOps.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 tags: backend|x86-64
diff --git a/FEXCore/Source/Interface/Core/JIT/x86_64/ConversionOps.cpp b/FEXCore/Source/Interface/Core/JIT/x86_64/ConversionOps.cpp
index d75efb85a..26fadc9d5 100644
--- a/FEXCore/Source/Interface/Core/JIT/x86_64/ConversionOps.cpp
+++ b/FEXCore/Source/Interface/Core/JIT/x86_64/ConversionOps.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 tags: backend|x86-64
diff --git a/FEXCore/Source/Interface/Core/JIT/x86_64/EncryptionOps.cpp b/FEXCore/Source/Interface/Core/JIT/x86_64/EncryptionOps.cpp
index 4aa5c1204..4b424572f 100644
--- a/FEXCore/Source/Interface/Core/JIT/x86_64/EncryptionOps.cpp
+++ b/FEXCore/Source/Interface/Core/JIT/x86_64/EncryptionOps.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 tags: backend|x86-64
diff --git a/FEXCore/Source/Interface/Core/JIT/x86_64/FlagOps.cpp b/FEXCore/Source/Interface/Core/JIT/x86_64/FlagOps.cpp
index 4100c10cb..d8b34be52 100644
--- a/FEXCore/Source/Interface/Core/JIT/x86_64/FlagOps.cpp
+++ b/FEXCore/Source/Interface/Core/JIT/x86_64/FlagOps.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 tags: backend|x86-64
diff --git a/FEXCore/Source/Interface/Core/JIT/x86_64/JIT.cpp b/FEXCore/Source/Interface/Core/JIT/x86_64/JIT.cpp
index 2e0f988ea..75cb39601 100644
--- a/FEXCore/Source/Interface/Core/JIT/x86_64/JIT.cpp
+++ b/FEXCore/Source/Interface/Core/JIT/x86_64/JIT.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 tags: backend|x86-64
diff --git a/FEXCore/Source/Interface/Core/JIT/x86_64/JITClass.h b/FEXCore/Source/Interface/Core/JIT/x86_64/JITClass.h
index 502a93ae9..75f2c188e 100644
--- a/FEXCore/Source/Interface/Core/JIT/x86_64/JITClass.h
+++ b/FEXCore/Source/Interface/Core/JIT/x86_64/JITClass.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 tags: backend|x86-64
diff --git a/FEXCore/Source/Interface/Core/JIT/x86_64/MemoryOps.cpp b/FEXCore/Source/Interface/Core/JIT/x86_64/MemoryOps.cpp
index 95164d90c..1d774e1bb 100644
--- a/FEXCore/Source/Interface/Core/JIT/x86_64/MemoryOps.cpp
+++ b/FEXCore/Source/Interface/Core/JIT/x86_64/MemoryOps.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 tags: backend|x86-64
diff --git a/FEXCore/Source/Interface/Core/JIT/x86_64/MiscOps.cpp b/FEXCore/Source/Interface/Core/JIT/x86_64/MiscOps.cpp
index fc7ab5bf7..71884a69c 100644
--- a/FEXCore/Source/Interface/Core/JIT/x86_64/MiscOps.cpp
+++ b/FEXCore/Source/Interface/Core/JIT/x86_64/MiscOps.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 tags: backend|x86-64
diff --git a/FEXCore/Source/Interface/Core/JIT/x86_64/MoveOps.cpp b/FEXCore/Source/Interface/Core/JIT/x86_64/MoveOps.cpp
index f912f5ae3..dacee3473 100644
--- a/FEXCore/Source/Interface/Core/JIT/x86_64/MoveOps.cpp
+++ b/FEXCore/Source/Interface/Core/JIT/x86_64/MoveOps.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 tags: backend|x86-64
diff --git a/FEXCore/Source/Interface/Core/JIT/x86_64/VectorOps.cpp b/FEXCore/Source/Interface/Core/JIT/x86_64/VectorOps.cpp
index 0e86c111a..9f32d546e 100644
--- a/FEXCore/Source/Interface/Core/JIT/x86_64/VectorOps.cpp
+++ b/FEXCore/Source/Interface/Core/JIT/x86_64/VectorOps.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 tags: backend|x86-64
diff --git a/FEXCore/Source/Interface/Core/JIT/x86_64/x64Relocations.cpp b/FEXCore/Source/Interface/Core/JIT/x86_64/x64Relocations.cpp
index 44b4c0238..08940fc65 100644
--- a/FEXCore/Source/Interface/Core/JIT/x86_64/x64Relocations.cpp
+++ b/FEXCore/Source/Interface/Core/JIT/x86_64/x64Relocations.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 /*
 $info$
 tags: backend|x86-64