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| #------------------------------------------------------------------------------
| #
| # Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
| #
| # SPDX-License-Identifier: BSD-2-Clause-Patent
| #
| #------------------------------------------------------------------------------
|
| #include <AsmMacroIoLib.h>
|
| ASM_FUNC(__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}
|
|
