[mirror_edk2.git] / ArmPkg / Library / CompilerIntrinsicsLib / Arm / switch32.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(__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
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
2ef2b01e A	7	# which accompanies this distribution. The full text of the license may be found at
d6ebcab7	8	# http://opensource.org/licenses/bsd-license.php
2ef2b01e A	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(__switch32)
2ef2b01e A	20
	21	ASM_PFX(__switch32):
	22	ldr ip, [lr, #-1]
	23	cmp r0, ip
	24	add r0, lr, r0, lsl #2
	25	ldrcc r0, [r0, #3]
	26	add ip, lr, ip, lsl #2
	27	ldrcs r0, [ip, #3]
	28	add ip, lr, r0
	29	bx ip
	30