audk/ArmPkg/Library/CompilerIntrinsicsLib/Arm/switch32.S

46 lines
1.5 KiB
ArmAsm

#------------------------------------------------------------------------------
#
# 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(__switch32)
ASM_PFX(__switch32):
ldr ip, [lr, #-1]
cmp r0, ip
add r0, lr, r0, lsl #2
ldrcc r0, [r0, #3]
add ip, lr, ip, lsl #2
ldrcs r0, [ip, #3]
add ip, lr, r0
bx ip