diff options
Diffstat (limited to 'ArmPkg/Library/CompilerIntrinsicsLib/Arm/switchu8.S')
-rw-r--r-- | ArmPkg/Library/CompilerIntrinsicsLib/Arm/switchu8.S | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/ArmPkg/Library/CompilerIntrinsicsLib/Arm/switchu8.S b/ArmPkg/Library/CompilerIntrinsicsLib/Arm/switchu8.S new file mode 100644 index 0000000000..e49204fdd4 --- /dev/null +++ b/ArmPkg/Library/CompilerIntrinsicsLib/Arm/switchu8.S @@ -0,0 +1,43 @@ +#------------------------------------------------------------------------------ +# +# Copyright (c) 2008-2009 Apple Inc. All rights reserved. +# +# All rights reserved. This program and the accompanying materials +# are licensed and made available under the terms and conditions of the BSD License +# which accompanies this distribution. The full text of the license may be found at +# http://opensource.org/licenses/bsd-license.php +# +# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. +# +#------------------------------------------------------------------------------ + +#/** @file +# Compiler intrinsic for ARM compiler +# +# Copyright (c) 2008, Apple, Inc. +# All rights reserved. This program and the accompanying materials +# are licensed and made available under the terms and conditions of the BSD License +# which accompanies this distribution. The full text of the license may be found at +# http)://opensource.org/licenses/bsd-license.php +# +# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.; +# +#**/ +# + +.text +.p2align 2 + +.globl ASM_PFX(__switchu8) + + +ASM_PFX(__switchu8): + ldrb ip,[lr,#-1] + cmp r3,ip + ldrccb r3,[lr,r3] + ldrcsb r3,[lr,ip] + add ip,lr,r3,LSL #1 + bx ip + |