diff options
Diffstat (limited to 'MdePkg/Library/CompilerIntrinsicsLib/Arm/switchu8.S')
| -rw-r--r-- | MdePkg/Library/CompilerIntrinsicsLib/Arm/switchu8.S | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/MdePkg/Library/CompilerIntrinsicsLib/Arm/switchu8.S b/MdePkg/Library/CompilerIntrinsicsLib/Arm/switchu8.S new file mode 100644 index 0000000000..a94b368ef9 --- /dev/null +++ b/MdePkg/Library/CompilerIntrinsicsLib/Arm/switchu8.S @@ -0,0 +1,21 @@ +#/** @file
+# Compiler intrinsic for ARM compiler
+#
+# Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#**/
+#
+
+#include <AsmMacroLib.h>
+
+.syntax unified
+
+ASM_FUNC(__switchu8)
+ ldrb ip,[lr,#-1]
+ cmp r0,ip
+ ldrbcc r0,[lr,r0]
+ ldrbcs r0,[lr,ip]
+ add ip,lr,r0,LSL #1
+ bx ip
+
|