db2/mutex/68020.gcc


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/*
 * @(#)68020.gcc	10.1 (Sleepycat) 4/12/97
 *
 * For gcc/68K, 0 is clear, 1 is set.
 */
#define TSL_SET(tsl) ({							\
	register tsl_t *__l = (tsl);					\
	int __r;							\
	    asm volatile("tas  %1; \n					\
			  seq  %0"					\
		: "=dm" (__r), "=m" (*__l)				\
		: "1" (*__l)						\
		);							\
	__r & 1;							\
})

#define	TSL_UNSET(tsl)	(*(tsl) = 0)
#define	TSL_INIT(tsl)	TSL_UNSET(tsl)