CloverBootloader/ArmPkg/Library/CompilerIntrinsicsLib/Arm/switchu8.S

22 lines
407 B
ArmAsm
Raw Normal View History

#/** @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(__switchu8)
ldrb ip,[lr,#-1]
cmp r0,ip
ldrbcc r0,[lr,r0]
ldrbcs r0,[lr,ip]
add ip,lr,r0,LSL #1
bx ip