v9/ml/lock_prim.s

200 	ldstub	[%o0], %o1		! try to set lock, get value in %o1
201 	brnz,pn	%o1, 1f
213 	ldstub	[%o0], %o1		! try to set lock, get value in %o1
214 	brnz,pn	%o1, 1f
225 	ldstub	[%o0], %o1
226 	brnz,pn	%o1, 1f			! go to C for the hard case
246 	ldstuba	[%o0]ASI_USER, %o1	! try to set lock, get value in %o1
247 	xor	%o1, 0xff, %o0		! delay - return non-zero if success
289 	cmp	%o3, %o1			! is current pil high enough?
291 	wrpr	%g0, %o1, %pil
329 	cmp	%o2, %o1			! compare new to base
330 	movl	%xcc, %o1, %o2			! use new pri if base is less
387 	mov	THREAD_REG, %o1
388 	casx	[%o0], %g0, %o1			! try to acquire as adaptive
389 	brnz,pn	%o1, 1f				! locked or wrong type
401 	mov	THREAD_REG, %o1
402 	casx	[%o0], %g0, %o1			! try to acquire as adaptive
403 	brnz,pn	%o1, 1f				! locked or wrong type continue
415 	mov	THREAD_REG, %o1
416 	casx	[%o0], %g0, %o1			! try to acquire as adaptive
417 	brnz,pn	%o1, 0f				! locked or wrong type
439 	ldn	[%o0], %o1		! get the owner field
441 	cmp	THREAD_REG, %o1		! do we own lock with no waiters?
458 	ldn	[%o0], %o1		! get the owner field
459 	and	%o1, MUTEX_THREAD, %o1	! remove the waiters bit if any
460 	brz,pn	%o1, 1f			! if so, drive on ...
462 	ldn	[%o1+T_CPU], %o2	! get owner->t_cpu
465 	cmp	%o1, %o3		! owner == running thread?
502 	cmp	%o1, RW_WRITER			! entering as writer?
553 	clr	%o1
574 	casx	[%o0], %o4, %o1			! try to drop write lock
575 	cmp	%o4, %o1			! did we succeed?
617 	mov	%i0, %o1;						\
621 1:	set	addr, %o1;						\
622 	sub	%o0, %o1, %o0;						\
625 	set	DISP22, %o1;						\
626 	and	%o1, %o0, %o0;						\
627 	set	BA, %o1;						\
628 	or	%o1, %o0, %o0;						\
632 	set	normal_instr, %o1;					\
635 	movnz	%icc, %o2, %o1;						\
767 	add	%o1, CPU_THREAD_LOCK, %o3 ! pointer to disp_lock while running