[mirror_edk2.git] / ArmPkg / Library / CompilerIntrinsicsLib / Arm / switch8.S

#/** @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(__switch8)

ASM_PFX(__switch8):
    ldrb      ip, [lr, #-1]
    cmp       r0, ip
    ldrccsb   r0, [lr, r0]
    ldrcssb   r0, [lr, ip]
    add       ip, lr, r0, lsl #1
    bx        ip
Commit	Line	Data
2ef2b01e A	1	#/** @file
	2	# Compiler intrinsic for ARM compiler
	3	#
d6ebcab7 HT	4	# Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
d6ebcab7 HT	5	# This program and the accompanying materials
2ef2b01e A	6	# are licensed and made available under the terms and conditions of the BSD License
	7	# which accompanies this distribution. The full text of the license may be found at
	8	# http)://opensource.org/licenses/bsd-license.php
	9	#
	10	# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
	11	# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.;
	12	#
	13	#**/
	14	#
	15
	16	.text
	17	.p2align 2
	18
1bfda055	19	GCC_ASM_EXPORT(__switch8)
2ef2b01e A	20
	21	ASM_PFX(__switch8):
	22	ldrb ip, [lr, #-1]
	23	cmp r0, ip
	24	ldrccsb r0, [lr, r0]
	25	ldrcssb r0, [lr, ip]
	26	add ip, lr, r0, lsl #1
	27	bx ip
	28