10093276e9
modified: libc/Android.mk
new files: libc/arch-sh/bionic/*
new files: libc/arch-sh/include/*
50 lines
1.8 KiB
ArmAsm
50 lines
1.8 KiB
ArmAsm
/*
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* Copyright (C) 2009 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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.text
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.type __atomic_cmpxchg, @function
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.globl __atomic_cmpxchg
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.align 4
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__atomic_cmpxchg:
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mova 1f, r0
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nop
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mov r15, r1
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mov #-8, r15 /* critical region start */
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0: mov.l @r6, r2
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cmp/eq r2, r4
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bt not_yet_modified
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mov #1, r0
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bra done
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nop
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not_yet_modified:
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mov #0, r0
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mov.l r5, @r6
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done:
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1: mov r1, r15 /* critical region end */
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rts
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nop
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