#------------------------------------------------------------------------------ | |
# | |
# Copyright (c) 2008 - 2010, 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 | |
.align 2 | |
GCC_ASM_EXPORT(__clzsi2) | |
ASM_PFX(__clzsi2): | |
@ frame_needed = 1, uses_anonymous_args = 0 | |
stmfd sp!, {r7, lr} | |
add r7, sp, #0 | |
movs r3, r0, lsr #16 | |
movne r3, #16 | |
moveq r3, #0 | |
movne r9, #0 | |
moveq r9, #16 | |
mov r3, r0, lsr r3 | |
tst r3, #65280 | |
movne r0, #8 | |
moveq r0, #0 | |
movne lr, #0 | |
moveq lr, #8 | |
mov r3, r3, lsr r0 | |
tst r3, #240 | |
movne r0, #4 | |
moveq r0, #0 | |
movne ip, #0 | |
moveq ip, #4 | |
mov r3, r3, lsr r0 | |
tst r3, #12 | |
movne r0, #2 | |
moveq r0, #0 | |
movne r1, #0 | |
moveq r1, #2 | |
mov r2, r3, lsr r0 | |
add r3, lr, r9 | |
add r0, r3, ip | |
add r1, r0, r1 | |
mov r0, r2, lsr #1 | |
eor r0, r0, #1 | |
ands r0, r0, #1 | |
mvnne r0, #0 | |
rsb r3, r2, #2 | |
and r0, r0, r3 | |
add r0, r1, r0 | |
ldmfd sp!, {r7, pc} |