[deliverable/linux.git] / arch / sparc / lib / bitops.S

/* bitops.S: Sparc64 atomic bit operations.
 *
 * Copyright (C) 2000, 2007 David S. Miller (davem@davemloft.net)
 */

#include <linux/linkage.h>
#include <asm/asi.h>
#include <asm/backoff.h>

	.text

ENTRY(test_and_set_bit)	/* %o0=nr, %o1=addr */
	BACKOFF_SETUP(%o3)
	srlx	%o0, 6, %g1
	mov	1, %o2
	sllx	%g1, 3, %g3
	and	%o0, 63, %g2
	sllx	%o2, %g2, %o2
	add	%o1, %g3, %o1
1:	ldx	[%o1], %g7
	or	%g7, %o2, %g1
	casx	[%o1], %g7, %g1
	cmp	%g7, %g1
	bne,pn	%xcc, BACKOFF_LABEL(2f, 1b)
	 and	%g7, %o2, %g2
	clr	%o0
	movrne	%g2, 1, %o0
	retl
	 nop
2:	BACKOFF_SPIN(%o3, %o4, 1b)
ENDPROC(test_and_set_bit)

ENTRY(test_and_clear_bit) /* %o0=nr, %o1=addr */
	BACKOFF_SETUP(%o3)
	srlx	%o0, 6, %g1
	mov	1, %o2
	sllx	%g1, 3, %g3
	and	%o0, 63, %g2
	sllx	%o2, %g2, %o2
	add	%o1, %g3, %o1
1:	ldx	[%o1], %g7
	andn	%g7, %o2, %g1
	casx	[%o1], %g7, %g1
	cmp	%g7, %g1
	bne,pn	%xcc, BACKOFF_LABEL(2f, 1b)
	 and	%g7, %o2, %g2
	clr	%o0
	movrne	%g2, 1, %o0
	retl
	 nop
2:	BACKOFF_SPIN(%o3, %o4, 1b)
ENDPROC(test_and_clear_bit)

ENTRY(test_and_change_bit) /* %o0=nr, %o1=addr */
	BACKOFF_SETUP(%o3)
	srlx	%o0, 6, %g1
	mov	1, %o2
	sllx	%g1, 3, %g3
	and	%o0, 63, %g2
	sllx	%o2, %g2, %o2
	add	%o1, %g3, %o1
1:	ldx	[%o1], %g7
	xor	%g7, %o2, %g1
	casx	[%o1], %g7, %g1
	cmp	%g7, %g1
	bne,pn	%xcc, BACKOFF_LABEL(2f, 1b)
	 and	%g7, %o2, %g2
	clr	%o0
	movrne	%g2, 1, %o0
	retl
	 nop
2:	BACKOFF_SPIN(%o3, %o4, 1b)
ENDPROC(test_and_change_bit)

ENTRY(set_bit) /* %o0=nr, %o1=addr */
	BACKOFF_SETUP(%o3)
	srlx	%o0, 6, %g1
	mov	1, %o2
	sllx	%g1, 3, %g3
	and	%o0, 63, %g2
	sllx	%o2, %g2, %o2
	add	%o1, %g3, %o1
1:	ldx	[%o1], %g7
	or	%g7, %o2, %g1
	casx	[%o1], %g7, %g1
	cmp	%g7, %g1
	bne,pn	%xcc, BACKOFF_LABEL(2f, 1b)
	 nop
	retl
	 nop
2:	BACKOFF_SPIN(%o3, %o4, 1b)
ENDPROC(set_bit)

ENTRY(clear_bit) /* %o0=nr, %o1=addr */
	BACKOFF_SETUP(%o3)
	srlx	%o0, 6, %g1
	mov	1, %o2
	sllx	%g1, 3, %g3
	and	%o0, 63, %g2
	sllx	%o2, %g2, %o2
	add	%o1, %g3, %o1
1:	ldx	[%o1], %g7
	andn	%g7, %o2, %g1
	casx	[%o1], %g7, %g1
	cmp	%g7, %g1
	bne,pn	%xcc, BACKOFF_LABEL(2f, 1b)
	 nop
	retl
	 nop
2:	BACKOFF_SPIN(%o3, %o4, 1b)
ENDPROC(clear_bit)

ENTRY(change_bit) /* %o0=nr, %o1=addr */
	BACKOFF_SETUP(%o3)
	srlx	%o0, 6, %g1
	mov	1, %o2
	sllx	%g1, 3, %g3
	and	%o0, 63, %g2
	sllx	%o2, %g2, %o2
	add	%o1, %g3, %o1
1:	ldx	[%o1], %g7
	xor	%g7, %o2, %g1
	casx	[%o1], %g7, %g1
	cmp	%g7, %g1
	bne,pn	%xcc, BACKOFF_LABEL(2f, 1b)
	 nop
	retl
	 nop
2:	BACKOFF_SPIN(%o3, %o4, 1b)
ENDPROC(change_bit)
Commit	Line	Data
24f287e4	1	/* bitops.S: Sparc64 atomic bit operations.
1da177e4	2	*
24f287e4	3	* Copyright (C) 2000, 2007 David S. Miller (davem@davemloft.net)
1da177e4 LT	4	*/
1da177e4 LT	5
8695c37d	6	#include <linux/linkage.h>
1da177e4	7	#include <asm/asi.h>
24f287e4	8	#include <asm/backoff.h>
1da177e4	9
b445e26c DM	10	.text
b445e26c DM	11
8695c37d	12	ENTRY(test_and_set_bit) /* %o0=nr, %o1=addr */
24f287e4	13	BACKOFF_SETUP(%o3)
1da177e4 LT	14	srlx %o0, 6, %g1
	15	mov 1, %o2
	16	sllx %g1, 3, %g3
	17	and %o0, 63, %g2
	18	sllx %o2, %g2, %o2
	19	add %o1, %g3, %o1
	20	1: ldx [%o1], %g7
	21	or %g7, %o2, %g1
	22	casx [%o1], %g7, %g1
	23	cmp %g7, %g1
0f58189d	24	bne,pn %xcc, BACKOFF_LABEL(2f, 1b)
1da177e4	25	and %g7, %o2, %g2
1da177e4	26	clr %o0
b445e26c	27	movrne %g2, 1, %o0
1da177e4	28	retl
b445e26c	29	nop
24f287e4	30	2: BACKOFF_SPIN(%o3, %o4, 1b)
8695c37d	31	ENDPROC(test_and_set_bit)
1da177e4	32
8695c37d	33	ENTRY(test_and_clear_bit) /* %o0=nr, %o1=addr */
24f287e4	34	BACKOFF_SETUP(%o3)
1da177e4 LT	35	srlx %o0, 6, %g1
	36	mov 1, %o2
	37	sllx %g1, 3, %g3
	38	and %o0, 63, %g2
	39	sllx %o2, %g2, %o2
	40	add %o1, %g3, %o1
	41	1: ldx [%o1], %g7
	42	andn %g7, %o2, %g1
	43	casx [%o1], %g7, %g1
	44	cmp %g7, %g1
0f58189d	45	bne,pn %xcc, BACKOFF_LABEL(2f, 1b)
1da177e4	46	and %g7, %o2, %g2
1da177e4	47	clr %o0
b445e26c	48	movrne %g2, 1, %o0
1da177e4	49	retl
b445e26c	50	nop
24f287e4	51	2: BACKOFF_SPIN(%o3, %o4, 1b)
8695c37d	52	ENDPROC(test_and_clear_bit)
1da177e4	53
8695c37d	54	ENTRY(test_and_change_bit) /* %o0=nr, %o1=addr */
24f287e4	55	BACKOFF_SETUP(%o3)
1da177e4 LT	56	srlx %o0, 6, %g1
	57	mov 1, %o2
	58	sllx %g1, 3, %g3
	59	and %o0, 63, %g2
	60	sllx %o2, %g2, %o2
	61	add %o1, %g3, %o1
	62	1: ldx [%o1], %g7
	63	xor %g7, %o2, %g1
	64	casx [%o1], %g7, %g1
	65	cmp %g7, %g1
0f58189d	66	bne,pn %xcc, BACKOFF_LABEL(2f, 1b)
1da177e4	67	and %g7, %o2, %g2
1da177e4	68	clr %o0
b445e26c	69	movrne %g2, 1, %o0
1da177e4	70	retl
b445e26c	71	nop
24f287e4	72	2: BACKOFF_SPIN(%o3, %o4, 1b)
8695c37d	73	ENDPROC(test_and_change_bit)
1da177e4	74
8695c37d	75	ENTRY(set_bit) /* %o0=nr, %o1=addr */
24f287e4	76	BACKOFF_SETUP(%o3)
1da177e4 LT	77	srlx %o0, 6, %g1
	78	mov 1, %o2
	79	sllx %g1, 3, %g3
	80	and %o0, 63, %g2
	81	sllx %o2, %g2, %o2
	82	add %o1, %g3, %o1
	83	1: ldx [%o1], %g7
	84	or %g7, %o2, %g1
	85	casx [%o1], %g7, %g1
	86	cmp %g7, %g1
0f58189d	87	bne,pn %xcc, BACKOFF_LABEL(2f, 1b)
1da177e4 LT	88	nop
	89	retl
	90	nop
24f287e4	91	2: BACKOFF_SPIN(%o3, %o4, 1b)
8695c37d	92	ENDPROC(set_bit)
1da177e4	93
8695c37d	94	ENTRY(clear_bit) /* %o0=nr, %o1=addr */
24f287e4	95	BACKOFF_SETUP(%o3)
1da177e4 LT	96	srlx %o0, 6, %g1
	97	mov 1, %o2
	98	sllx %g1, 3, %g3
	99	and %o0, 63, %g2
	100	sllx %o2, %g2, %o2
	101	add %o1, %g3, %o1
	102	1: ldx [%o1], %g7
	103	andn %g7, %o2, %g1
	104	casx [%o1], %g7, %g1
	105	cmp %g7, %g1
0f58189d	106	bne,pn %xcc, BACKOFF_LABEL(2f, 1b)
1da177e4 LT	107	nop
	108	retl
	109	nop
24f287e4	110	2: BACKOFF_SPIN(%o3, %o4, 1b)
8695c37d	111	ENDPROC(clear_bit)
1da177e4	112
8695c37d	113	ENTRY(change_bit) /* %o0=nr, %o1=addr */
24f287e4	114	BACKOFF_SETUP(%o3)
1da177e4 LT	115	srlx %o0, 6, %g1
	116	mov 1, %o2
	117	sllx %g1, 3, %g3
	118	and %o0, 63, %g2
	119	sllx %o2, %g2, %o2
	120	add %o1, %g3, %o1
	121	1: ldx [%o1], %g7
	122	xor %g7, %o2, %g1
	123	casx [%o1], %g7, %g1
	124	cmp %g7, %g1
0f58189d	125	bne,pn %xcc, BACKOFF_LABEL(2f, 1b)
1da177e4 LT	126	nop
	127	retl
	128	nop
24f287e4	129	2: BACKOFF_SPIN(%o3, %o4, 1b)
8695c37d	130	ENDPROC(change_bit)