static inline void clear_bit()

in include/asm/bitops/atomic.h [29:44]

• 15 lines of code
• 1 McCabe index (conditional complexity)

static inline void clear_bit(int nr, volatile unsigned long *addr)
{
	unsigned long mask = BIT_MASK(nr);
	unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
	unsigned long tmp;

	__asm__ __volatile__(
		"1:	l.lwa	%0,0(%1)	\n"
		"	l.and	%0,%0,%2	\n"
		"	l.swa	0(%1),%0	\n"
		"	l.bnf	1b		\n"
		"	 l.nop			\n"
		: "=&r"(tmp)
		: "r"(p), "r"(~mask)
		: "cc", "memory");
}