diff --git a/src/coreclr/jit/regset.cpp b/src/coreclr/jit/regset.cpp
index 2ef2f9c1e17f1..3003dbf2a60e3 100644
--- a/src/coreclr/jit/regset.cpp
+++ b/src/coreclr/jit/regset.cpp
@@ -44,6 +44,34 @@ XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
 */
 
+#ifdef SWIFT_SUPPORT
+    regMaskTP rsAllCalleeSavedMask;
+    regMaskTP rsIntCalleeSavedMask;
+#else  // !SWIFT_SUPPORT
+    static constexpr regMaskTP rsAllCalleeSavedMask = RBM_CALLEE_SAVED;
+    static constexpr regMaskTP rsIntCalleeSavedMask = RBM_INT_CALLEE_SAVED;
+#endif // !SWIFT_SUPPORT
+
+regMaskTP RegSet::rsGetModifiedCalleeSavedRegsMask() const
+{
+    assert(rsModifiedRegsMaskInitialized);
+    return (rsModifiedRegsMask & rsAllCalleeSavedMask);
+}
+
+#ifdef TARGET_AMD64
+regMaskTP RegSet::rsGetModifiedOsrIntCalleeSavedRegsMask() const
+{
+    assert(rsModifiedRegsMaskInitialized);
+    return (rsModifiedRegsMask & (rsIntCalleeSavedMask | RBM_EBP));
+}
+#endif // TARGET_AMD64
+
+regMaskTP RegSet::rsGetModifiedIntCalleeSavedRegsMask() const
+{
+    assert(rsModifiedRegsMaskInitialized);
+    return (rsModifiedRegsMask & rsIntCalleeSavedMask);
+}
+
 //------------------------------------------------------------------------
 // verifyRegUsed: verify that the register is marked as used.
 //
diff --git a/src/coreclr/jit/regset.h b/src/coreclr/jit/regset.h
index 20b55610594fc..1ca2539f72958 100644
--- a/src/coreclr/jit/regset.h
+++ b/src/coreclr/jit/regset.h
@@ -74,14 +74,6 @@ class RegSet
     bool rsModifiedRegsMaskInitialized; // Has rsModifiedRegsMask been initialized? Guards against illegal use.
 #endif                                  // DEBUG
 
-#ifdef SWIFT_SUPPORT
-    regMaskTP rsAllCalleeSavedMask;
-    regMaskTP rsIntCalleeSavedMask;
-#else  // !SWIFT_SUPPORT
-    static constexpr regMaskTP rsAllCalleeSavedMask = RBM_CALLEE_SAVED;
-    static constexpr regMaskTP rsIntCalleeSavedMask = RBM_INT_CALLEE_SAVED;
-#endif // !SWIFT_SUPPORT
-
 public:
     regMaskTP rsGetModifiedRegsMask() const
     {
@@ -89,24 +81,11 @@ class RegSet
         return rsModifiedRegsMask;
     }
 
-    regMaskTP rsGetModifiedCalleeSavedRegsMask() const
-    {
-        assert(rsModifiedRegsMaskInitialized);
-        return (rsModifiedRegsMask & rsAllCalleeSavedMask);
-    }
-
-    regMaskTP rsGetModifiedIntCalleeSavedRegsMask() const
-    {
-        assert(rsModifiedRegsMaskInitialized);
-        return (rsModifiedRegsMask & rsIntCalleeSavedMask);
-    }
+    regMaskTP rsGetModifiedCalleeSavedRegsMask() const;
+    regMaskTP rsGetModifiedIntCalleeSavedRegsMask() const;
 
 #ifdef TARGET_AMD64
-    regMaskTP rsGetModifiedOsrIntCalleeSavedRegsMask() const
-    {
-        assert(rsModifiedRegsMaskInitialized);
-        return (rsModifiedRegsMask & (rsIntCalleeSavedMask | RBM_EBP));
-    }
+    regMaskTP rsGetModifiedOsrIntCalleeSavedRegsMask() const;
 #endif // TARGET_AMD64
 
     regMaskTP rsGetModifiedFltCalleeSavedRegsMask() const