50 lines
1.3 KiB
ArmAsm
50 lines
1.3 KiB
ArmAsm
/*
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* $QNXLicenseC:
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* Copyright 2007, QNX Software Systems. All Rights Reserved.
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*
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* You must obtain a written license from and pay applicable license fees to QNX
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* Software Systems before you may reproduce, modify or distribute this software,
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* or any work that includes all or part of this software. Free development
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* licenses are available for evaluation and non-commercial purposes. For more
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* information visit http://licensing.qnx.com or email licensing@qnx.com.
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*
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* This file may contain contributions from others. Please review this entire
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* file for other proprietary rights or license notices, as well as the QNX
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* Development Suite License Guide at http://licensing.qnx.com/license-guide/
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* for other information.
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* $
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*/
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/*
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* atomic_toggle.S
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* atomicly toggle bit(s) in a memory location
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*/
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#include <mips/asm.h>
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#
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# void atomic_toggle( volatile unsigned *loc, unsigned bits )
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# unsigned atomic_toggle_value( volatile unsigned *loc, unsigned bits )
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#
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FRAME(atomic_toggle,sp,0,ra)
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atomic_toggle_value:
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.set noreorder
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.set mips3
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1: ll v0,0(a0)
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nop
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xor t0,v0,a1
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sc t0,0(a0)
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beq t0,zero,1b
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nop
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j ra
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sync
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ENDFRAME(atomic_toggle)
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.globl atomic_toggle_value
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.type atomic_toggle_value,@function
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.size atomic_toggle_value,.-atomic_toggle_value
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