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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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#
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.text
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.text
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.global atomic_inc
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atomic_inc:
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	pushl %ebx
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	movl 8(%esp),%ebx
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#ifdef __SMP__
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	lock incl (%ebx)
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#else
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	incl (%ebx)
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#endif
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	popl %ebx
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	ret
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.global atomic_dec
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atomic_dec:
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	pushl %ebx
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	movl 8(%esp),%ebx
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#ifdef __SMP__
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	lock decl (%ebx)
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#else
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	decl (%ebx)
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#endif
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	popl %ebx
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	ret
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#ifdef __SMP__
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#ifdef __SMP__
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.global test_and_set
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.global spinlock_arch
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.global spinlock_arch
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test_and_set:
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	pushl %ebx
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	movl 8(%esp),%ebx
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	movl $1,%eax
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	xchgl %eax,(%ebx)	# xchg implicitly turns on the LOCK signal
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	popl %ebx
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	ret
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#
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#
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# This is a bus-and-hyperthreading-friendly implementation of spinlock
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# This is a bus-and-hyperthreading-friendly implementation of spinlock
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#
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#
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spinlock_arch:
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spinlock_arch:
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	pushl %eax
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	pushl %eax