[mirror_edk2.git] / ArmPkg / Library / CompilerIntrinsicsLib / Arm / switchu8.S

#/** @file\r
#  Compiler intrinsic for ARM compiler\r
#\r
#  Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r
#  SPDX-License-Identifier: BSD-2-Clause-Patent\r
#\r
#**/\r
#\r
\r
#include <AsmMacroIoLib.h>\r
\r
.syntax unified\r
\r
ASM_FUNC(__switchu8)\r
    ldrb      ip,[lr,#-1]\r
    cmp       r0,ip\r
    ldrbcc    r0,[lr,r0]\r
    ldrbcs    r0,[lr,ip]\r
    add       ip,lr,r0,LSL #1\r
    bx        ip\r
\r
Commit	Line	Data
1e57a462	1	#/** @file\r
	2	# Compiler intrinsic for ARM compiler\r
	3	#\r
	4	# Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r
4059386c	5	# SPDX-License-Identifier: BSD-2-Clause-Patent\r
1e57a462	6	#\r
1e57a462	7	#**/\r
3402aac7	8	#\r
1e57a462	9	\r
903e3124	10	#include <AsmMacroIoLib.h>\r
1e57a462	11	\r
903e3124	12	.syntax unified\r
1e57a462	13	\r
903e3124	14	ASM_FUNC(__switchu8)\r
1e57a462	15	ldrb ip,[lr,#-1]\r
1e57a462	16	cmp r0,ip\r
1a0db791 AB	17	ldrbcc r0,[lr,r0]\r
1a0db791 AB	18	ldrbcs r0,[lr,ip]\r
1e57a462	19	add ip,lr,r0,LSL #1\r
	20	bx ip\r
	21	\r