903e31242d
Annotate functions with ASM_FUNC() so that they are emitted into separate sections. Note that in some cases, various entry points refer to different parts of the same routine, so in those cases, the files have been left untouched. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
48 lines
1.2 KiB
ArmAsm
48 lines
1.2 KiB
ArmAsm
#------------------------------------------------------------------------------
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#
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# Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>
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#
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# This program and the accompanying materials
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# are licensed and made available under the terms and conditions of the BSD License
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# which accompanies this distribution. The full text of the license may be found at
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# http://opensource.org/licenses/bsd-license.php
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#
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#
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#------------------------------------------------------------------------------
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#include <AsmMacroIoLib.h>
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ASM_FUNC(__ctzsi2)
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uxth r3, r0
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cmp r3, #0
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moveq ip, #16
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movne ip, #0
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@ lr needed for prologue
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mov r0, r0, lsr ip
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tst r0, #255
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movne r3, #0
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moveq r3, #8
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mov r0, r0, lsr r3
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tst r0, #15
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movne r1, #0
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moveq r1, #4
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add r3, r3, ip
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mov r0, r0, lsr r1
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tst r0, #3
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movne r2, #0
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moveq r2, #2
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add r3, r3, r1
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mov r0, r0, lsr r2
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and r0, r0, #3
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add r2, r3, r2
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eor r3, r0, #1
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mov r0, r0, lsr #1
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ands r3, r3, #1
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mvnne r3, #0
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rsb r0, r0, #2
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and r0, r3, r0
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add r0, r2, r0
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bx lr
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