audk/ArmPkg/Library/CompilerIntrinsicsLib/Arm/switch16.S

32 lines
849 B
ArmAsm

#/** @file
# Compiler intrinsic for ARM compiler
#
# Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
# 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
GCC_ASM_EXPORT(__switch16)
ASM_PFX(__switch16):
ldrh ip, [lr, #-1]
cmp r0, ip
add r0, lr, r0, lsl #1
ldrccsh r0, [r0, #1]
add ip, lr, ip, lsl #1
ldrcssh r0, [ip, #1]
add ip, lr, r0, lsl #1
bx ip