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#include <sys/regdef.h>
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#include <sys/asm.h>
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.globl tas
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.ent tas 2
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tas:
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.set noreorder
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1:
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	ori	t1, zero, 12345	/* t1 = 12345 */
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	ll	t0, (a0)		/* t0 = *a0 */
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	sc	t1, (a0)		/* *a0 = t1 if *a0 hasn't changed; t1=success */
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	beq	t1, zero, 1b		/* repeat if *a0 did change */
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	nop
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	j $31				/* return */
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	or	v0, t0, zero		/* set return value on way out */
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.set reorder
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.end tas
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