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1a0db79125
The CLANG assembler does not support the legacy, non-unified assembler syntax, i.e., it does not support the reordering of the condition suffixes with the increment/decrement before/after or byte/word suffixes, and it does not recognize the 'empty descending' (ED) suffix at all. So move to the unified syntax, and replace 'empty descending' with 'decrement after' or 'increment before' as appropriate. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19280 6f19259b-4bc3-4df7-8a09-765794883524
59 lines
1.4 KiB
ArmAsm
59 lines
1.4 KiB
ArmAsm
#------------------------------------------------------------------------------
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#
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# Copyright (c) 2008 - 2009, 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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.text
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.syntax unified
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.align 2
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GCC_ASM_EXPORT(__udivsi3)
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ASM_PFX(__udivsi3):
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cmp r1, #0
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cmpne r0, #0
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stmfd sp!, {r4, r5, r7, lr}
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add r7, sp, #8
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beq L2
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clz r2, r1
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clz r3, r0
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rsb r3, r3, r2
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cmp r3, #31
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bhi L2
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ldmfdeq sp!, {r4, r5, r7, pc}
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add r5, r3, #1
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rsb r3, r3, #31
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mov lr, #0
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mov r2, r0, asl r3
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mov ip, r0, lsr r5
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mov r4, lr
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b L8
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L9:
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mov r0, r2, lsr #31
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orr ip, r0, ip, asl #1
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orr r2, r3, lr
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rsb r3, ip, r1
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sub r3, r3, #1
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and r0, r1, r3, asr #31
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mov lr, r3, lsr #31
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rsb ip, r0, ip
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add r4, r4, #1
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L8:
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cmp r4, r5
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mov r3, r2, asl #1
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bne L9
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orr r0, r3, lr
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ldmfd sp!, {r4, r5, r7, pc}
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L2:
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mov r0, #0
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ldmfd sp!, {r4, r5, r7, pc}
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