mirror of https://github.com/acidanthera/audk.git
52 lines
1.3 KiB
ArmAsm
52 lines
1.3 KiB
ArmAsm
|
#------------------------------------------------------------------------------
|
||
|
|
#
|
||
|
|
# Copyright (c) 2008-2010 Apple Inc. All rights reserved.
|
||
|
|
#
|
||
|
|
# All rights reserved. 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
|
||
|
|
.align 2
|
||
|
|
.globl ___ctzsi2
|
||
|
|
___ctzsi2:
|
||
|
|
@ args = 0, pretend = 0, frame = 0
|
||
|
|
@ frame_needed = 0, uses_anonymous_args = 0
|
||
|
|
@ link register save eliminated.
|
||
|
|
uxth r3, r0
|
||
|
|
cmp r3, #0
|
||
|
|
moveq ip, #16
|
||
|
|
movne ip, #0
|
||
|
|
@ lr needed for prologue
|
||
|
|
mov r0, r0, lsr ip
|
||
|
|
tst r0, #255
|
||
|
|
movne r3, #0
|
||
|
|
moveq r3, #8
|
||
|
|
mov r0, r0, lsr r3
|
||
|
|
tst r0, #15
|
||
|
|
movne r1, #0
|
||
|
|
moveq r1, #4
|
||
|
|
add r3, r3, ip
|
||
|
|
mov r0, r0, lsr r1
|
||
|
|
tst r0, #3
|
||
|
|
movne r2, #0
|
||
|
|
moveq r2, #2
|
||
|
|
add r3, r3, r1
|
||
|
|
mov r0, r0, lsr r2
|
||
|
|
and r0, r0, #3
|
||
|
|
add r2, r3, r2
|
||
|
|
eor r3, r0, #1
|
||
|
|
mov r0, r0, lsr #1
|
||
|
|
ands r3, r3, #1
|
||
|
|
mvnne r3, #0
|
||
|
|
rsb r0, r0, #2
|
||
|
|
and r0, r3, r0
|
||
|
|
add r0, r2, r0
|
||
|
|
bx lr
|