1 files changed, 24 insertions, 0 deletions
diff --git a/roms/edk2/ArmPkg/Library/CompilerIntrinsicsLib/Arm/switch16.S b/roms/edk2/ArmPkg/Library/CompilerIntrinsicsLib/Arm/switch16.S
new file mode 100644
index 000000000..e6d55673c
--- /dev/null
+++ b/roms/edk2/ArmPkg/Library/CompilerIntrinsicsLib/Arm/switch16.S
@@ -0,0 +1,24 @@
+#/** @file
+#  Compiler intrinsic for ARM compiler
+#
+#  Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#**/
+#
+
+#include <AsmMacroIoLib.h>
+
+.syntax unified
+
+ASM_FUNC(__switch16)
+    ldrh      ip, [lr, #-1]
+    cmp       r0, ip
+    add       r0, lr, r0, lsl #1
+    ldrshcc   r0, [r0, #1]
+    add       ip, lr, ip, lsl #1
+    ldrshcs   r0, [ip, #1]
+    add       ip, lr, r0, lsl #1
+    bx        ip
+
+