1 files changed, 15 insertions, 0 deletions
diff --git a/src/Ryujinx.Cpu/LightningJit/CodeGen/Arm64/AbiConstants.cs b/src/Ryujinx.Cpu/LightningJit/CodeGen/Arm64/AbiConstants.cs
new file mode 100644
index 00000000..24a646ca
--- /dev/null
+++ b/src/Ryujinx.Cpu/LightningJit/CodeGen/Arm64/AbiConstants.cs
@@ -0,0 +1,15 @@
+namespace Ryujinx.Cpu.LightningJit.CodeGen.Arm64
+{
+    static class AbiConstants
+    {
+        // Some of those register have specific roles and can't be used as general purpose registers.
+        // X18 - Reserved for platform specific usage.
+        // X29 - Frame pointer.
+        // X30 - Return address.
+        // X31 - Not an actual register, in some cases maps to SP, and in others to ZR.
+        public const uint ReservedRegsMask = (1u << 18) | (1u << 29) | (1u << 30) | (1u << 31);
+
+        public const uint GprCalleeSavedRegsMask = 0x1ff80000; // X19 to X28
+        public const uint FpSimdCalleeSavedRegsMask = 0xff00; // D8 to D15
+    }
+}