Firestorm: SUBS (sxtw, 64-bit) measurements

Code:

  subs x0, x0, w1, sxtw

Initialization

  mov x0, 1
  mov x1, 2

(no loop instructions)

1000 unrolls and 1 iteration

Retires: 1.000

Issues: 2.000

Integer unit issues: 2.000

Load/store unit issues: 0.000

SIMD/FP unit issues: 0.000

All non-zero counters (first 10 of 64 runs)

retire uop (01)	cycle (02)	03	mmu table walk data (08)	1e	1f	3f	4c	4d	51	schedule uop (52)	schedule int uop (53)	dispatch int uop (56)	int uops in schedulers (59)	60	6d	6e	map stall dispatch (70)	map rewind (75)	map stall (76)	dispatch uop (78)	map int uop (7c)	map int uop inputs (7f)	82	83	flush restart other nonspec (84)	85	inst all (8c)	inst int alu (97)	ld unit uop (a6)	l1d cache writeback (a8)	ac	cf	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? int output thing (e9)	? int retires (ef)	f5	f6	f7	f8	fd
1004	2035	15	0	0	0	61	1000	1862	25	2000	2000	1000	126235	1	2035	2035	1729	3	1866	1000	1000	2000	2035	41	1	1	1001	1000	0	0	0	73	1	43	1	1	1920	2000	1000	2036	2036	2036	2036	2036
1004	2035	15	0	0	0	61	1000	1862	25	2000	2000	1000	126235	1	2035	2035	1729	3	1866	1000	1000	2000	2035	41	1	1	1001	1000	0	0	0	73	1	43	1	1	1920	2000	1000	2036	2036	2036	2036	2036
1004	2035	15	0	0	0	61	1000	1862	25	2000	2000	1000	126235	1	2035	2035	1729	3	1866	1000	1000	2000	2035	41	1	1	1001	1000	0	0	0	73	1	43	1	1	1920	2000	1000	2036	2036	2036	2036	2036
1004	2035	15	0	0	0	61	1000	1862	25	2000	2000	1000	126235	1	2035	2035	1729	3	1866	1000	1000	2000	2035	41	1	1	1001	1000	0	0	0	73	1	43	1	1	1920	2000	1000	2036	2036	2036	2036	2036
1004	2035	15	0	0	0	61	1000	1862	25	2000	2000	1000	126235	1	2035	2035	1729	3	1866	1000	1000	2000	2035	44	1	1	1001	1000	0	0	0	73	1	43	1	1	1920	2000	1000	2036	2036	2036	2082	2036
1004	2035	15	0	0	0	61	1000	1862	25	2000	2000	1000	126235	0	2035	2035	1729	3	1866	1000	1000	2000	2035	41	1	1	1001	1000	0	1	0	73	1	43	1	1	1920	2000	1000	2036	2036	2036	2036	2036
1004	2035	15	0	0	0	61	1000	1862	25	2000	2000	1000	126235	0	2035	2035	1729	3	1866	1000	1000	2000	2035	41	1	1	1001	1000	0	0	0	73	1	43	1	1	1920	2000	1000	2036	2036	2036	2036	2036
1004	2035	15	0	0	0	61	1000	1862	25	2000	2000	1000	126235	1	2035	2035	1729	3	1866	1000	1000	2000	2035	41	1	1	1001	1000	2	0	0	73	1	43	1	1	1953	2000	1000	2036	2036	2036	2036	2036
1004	2035	15	0	0	0	61	1000	1862	25	2000	2000	1000	126235	0	2035	2035	1729	3	1866	1000	1000	2000	2035	41	1	1	1001	1000	0	1	0	73	1	43	1	1	1920	2000	1000	2036	2036	2036	2036	2036
1004	2035	15	0	0	0	61	1000	1862	25	2000	2000	1000	126235	1	2035	2035	1729	3	1866	1000	1000	2000	2035	41	1	1	1001	1000	0	0	0	73	1	43	1	1	1920	2000	1000	2036	2036	2036	2036	2036

Test 2: Latency 1->2

Code:

  subs x0, x0, w1, sxtw

Initialization

  mov x0, 1
  mov x1, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 2.0035

All non-zero counters (first 10 of 64 runs)

retire uop (01)	cycle (02)	03	18	1e	1f	3f	4c	4d	51	schedule uop (52)	schedule int uop (53)	dispatch int uop (56)	int uops in schedulers (59)	60	69	6a	6d	6e	map stall dispatch (70)	map rewind (75)	map stall (76)	dispatch uop (78)	map int uop (7c)	map int uop inputs (7f)	82	83	flush restart other nonspec (84)	85	inst all (8c)	inst branch (8d)	inst branch taken (90)	inst branch cond (94)	inst int alu (97)	9f	l1d cache writeback (a8)	ac	c2	cf	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? int output thing (e9)	? int retires (ef)	f5	f6	f7	f8	fd
10204	20035	150	0	0	0	61	10000	19862	25	20100	20100	10100	1305121	1	49	16955	20035	20035	18581	11	18720	10100	10200	20200	20035	41	1	1	10201	100	99	100	10100	100	0	0	0	710	1	39	1	1	19922	20000	10100	20036	20036	20036	20036	20036
10204	20035	150	0	0	0	61	10018	19862	25	20100	20100	10100	1305121	1	49	17001	20035	20035	18581	3	18720	10100	10288	20376	20035	41	1	1	10201	100	99	100	10100	100	0	3	0	710	3	39	1	1	19922	20000	10100	20036	20036	20036	20036	20036
10204	20035	150	0	144	88	61	10000	19862	25	20100	20100	10100	1305121	1	49	16955	20035	20035	18581	3	18720	10100	10200	20200	20035	41	1	1	10201	100	99	100	10100	100	0	0	0	710	1	39	1	1	19922	20000	10100	20036	20036	20036	20036	20036
10204	20035	150	0	0	0	61	10000	19862	25	20100	20100	10100	1305121	1	49	16955	20035	20035	18581	3	18720	10100	10200	20200	20035	41	1	1	10201	100	99	100	10100	100	0	0	0	710	1	39	1	1	19922	20000	10100	20036	20036	20036	20036	20036
10204	20035	150	0	0	264	61	10000	19862	25	20100	20100	10100	1305121	1	49	16955	20035	20035	18615	3	18720	10100	10200	20200	20035	41	1	1	10201	100	99	100	10100	100	0	0	0	710	1	39	1	1	19922	20000	10100	20036	20036	20036	20036	20036
10204	20035	150	0	0	0	61	10000	19862	25	20100	20100	10100	1305121	1	49	16955	20035	20035	18581	3	18720	10100	10200	20200	20035	41	1	1	10201	100	99	100	10100	100	0	0	0	710	1	39	1	1	19922	20000	10100	20036	20036	20036	20036	20036
10204	20035	150	0	0	0	61	10000	19862	25	20100	20100	10100	1305121	1	49	16955	20035	20035	18581	3	18720	10100	10200	20200	20035	41	1	1	10201	100	99	100	10100	100	0	0	0	710	1	39	1	1	19922	20000	10100	20036	20036	20036	20036	20036
10204	20035	150	0	0	0	61	10000	19862	25	20100	20100	10100	1305121	1	49	16955	20035	20035	18581	3	18720	10100	10200	20200	20035	41	1	1	10201	100	99	100	10100	100	0	0	0	710	1	39	1	1	19922	20000	10100	20036	20036	20036	20036	20036
10204	20035	150	0	0	0	61	10000	19862	25	20100	20100	10100	1305121	1	49	16955	20035	20035	18581	3	18720	10100	10200	20200	20035	41	1	1	10201	100	99	100	10100	100	0	0	0	710	1	39	1	1	19922	20000	10100	20036	20036	20036	20036	20036
10204	20035	150	0	0	0	61	10000	19862	25	20100	20100	10100	1305121	1	49	16955	20035	20035	18581	3	18720	10100	10200	20200	20035	41	1	1	10201	100	99	100	10100	100	5	0	0	710	1	39	1	1	19922	20000	10100	20036	20036	20036	20036	20036

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0035

All non-zero counters (first 10 of 64 runs)

retire uop (01)	cycle (02)	03	1e	3f	4c	4d	51	schedule uop (52)	schedule int uop (53)	dispatch int uop (56)	int uops in schedulers (59)	69	6a	6d	6e	map stall dispatch (70)	map rewind (75)	map stall (76)	dispatch uop (78)	map int uop (7c)	map int uop inputs (7f)	82	83	flush restart other nonspec (84)	85	inst all (8c)	inst branch (8d)	inst branch taken (90)	inst branch cond (94)	inst int alu (97)	9f	l1d cache writeback (a8)	ac	cf	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? int output thing (e9)	? int retires (ef)	f5	f6	f7	f8	fd
10024	20035	150	0	61	10000	19862	25	20010	20010	10010	1305229	49	16955	20035	20035	18603	3	18740	10010	10020	20020	20035	41	1	1	10021	10	9	10	10010	10	0	0	640	4	41	2	2	19930	20000	10010	20036	20036	20036	20036	20036
10024	20035	150	0	61	10000	19862	25	20010	20010	10010	1305229	49	16955	20035	20035	18603	3	18740	10010	10020	20020	20035	41	1	1	10021	10	9	10	10010	10	0	0	640	2	41	2	2	19930	20000	10010	20036	20036	20036	20036	20036
10024	20035	150	0	61	10000	19862	25	20010	20010	10010	1305229	49	16955	20035	20035	18603	3	18740	10010	10020	20020	20035	41	1	1	10021	10	9	10	10010	10	0	63	640	2	41	2	2	19930	20000	10010	20036	20036	20036	20036	20036
10024	20035	150	0	61	10000	19862	25	20010	20010	10010	1305229	49	16955	20035	20035	18603	3	18740	10010	10020	20020	20035	41	1	1	10021	10	9	10	10010	10	0	0	640	2	41	2	2	19930	20000	10010	20177	20036	20036	20036	20036
10024	20035	150	0	61	10000	19862	25	20010	20010	10010	1305229	49	16955	20035	20035	18603	3	18740	10010	10020	20020	20081	41	1	1	10021	10	9	10	10010	10	2	0	640	2	41	2	2	19930	20000	10010	20036	20036	20036	20036	20036
10024	20035	150	0	61	10000	19862	25	20010	20010	10010	1305229	49	16955	20035	20035	18603	3	18740	10010	10020	20020	20035	41	1	1	10022	10	9	10	10010	10	0	0	640	2	41	2	2	19930	20000	10010	20036	20036	20036	20036	20036
10024	20035	150	12	61	10000	19862	25	20010	20010	10010	1305229	49	17094	20035	20035	18603	3	18740	10010	10020	20020	20035	41	1	1	10021	10	9	10	10010	10	0	57	640	2	41	2	2	19930	20000	10010	20036	20036	20036	20036	20036
10024	20035	150	0	61	10000	19862	25	20010	20010	10010	1305229	49	16955	20035	20035	18603	3	18740	10010	10020	20020	20035	41	1	1	10021	10	9	10	10010	10	0	75	640	2	41	2	2	19930	20000	10010	20036	20036	20036	20036	20036
10024	20035	150	0	441	10000	19862	25	20010	20010	10010	1305229	49	16955	20035	20035	18603	3	18740	10010	10020	20020	20035	41	1	1	10021	10	9	10	10010	10	0	0	640	2	41	2	2	19930	20000	10010	20036	20036	20036	20036	20036
10024	20035	150	0	61	10000	19862	25	20010	20010	10010	1305229	49	16955	20035	20035	18603	3	18740	10010	10020	20020	20035	41	1	1	10021	10	9	10	10010	10	0	0	640	2	41	2	2	19930	20000	10010	20036	20036	20036	20036	20036

Test 3: Latency 1->3

Code:

  subs x0, x1, w0, sxtw

Initialization

  mov x0, 1
  mov x1, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 2.0035

All non-zero counters (first 10 of 64 runs)

retire uop (01)	cycle (02)	03	mmu table walk data (08)	l2 tlb miss data (0b)	18	19	1e	1f	3a	3f	4c	4d	51	schedule uop (52)	schedule int uop (53)	dispatch int uop (56)	int uops in schedulers (59)	60	69	6a	6b	6d	6e	map stall dispatch (70)	map rewind (75)	map stall (76)	dispatch uop (78)	map int uop (7c)	map int uop inputs (7f)	82	83	flush restart other nonspec (84)	85	inst all (8c)	inst branch (8d)	inst branch taken (90)	inst branch cond (94)	inst int alu (97)	9f	l1d tlb access (a0)	l1d tlb miss (a1)	ld unit uop (a6)	l1d cache writeback (a8)	a9	ac	c2	cf	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? int output thing (e9)	? int retires (ef)	f5	f6	f7	f8	fd
10204	20035	150	0	0	0	0	0	0	0	61	10000	19862	25	20100	20100	10100	1305121	1	49	16955	0	20035	20035	18581	3	18720	10100	10200	20200	20035	41	1	1	10201	100	99	100	10100	100	0	0	0	0	0	0	0	710	2	39	2	2	19922	20000	10100	20036	20036	20036	20036	20036
10204	20035	150	0	0	0	0	0	0	0	61	10000	19862	25	20100	20100	10100	1305121	1	49	16955	0	20035	20035	18581	3	18720	10100	10200	20200	20035	41	1	1	10201	100	99	100	10100	100	0	0	0	0	0	0	0	710	2	39	2	2	19922	20000	10100	20036	20036	20036	20036	20036
10204	20035	150	0	0	0	0	0	0	0	420	10000	19862	25	20100	20100	10100	1305121	1	49	16955	0	20035	20035	18581	3	18720	10100	10200	20200	20035	41	1	1	10201	100	99	100	10100	100	0	0	0	0	0	0	0	710	2	39	2	2	19922	20000	10100	20036	20036	20036	20036	20036
10204	20035	149	0	0	0	0	0	0	0	61	10000	19862	25	20100	20100	10100	1305121	1	49	16955	0	20035	20035	18581	3	18720	10100	10200	20200	20035	41	1	1	10201	100	99	100	10100	100	0	0	0	0	0	0	0	710	2	39	2	2	19922	20000	10100	20036	20036	20036	20036	20036
10204	20035	150	0	0	0	0	0	0	0	82	10000	19862	25	20100	20100	10100	1305121	1	49	16955	0	20035	20035	18581	3	18720	10100	10200	20200	20035	41	1	1	10201	100	99	100	10100	100	0	0	0	0	0	0	0	710	2	39	2	2	19922	20000	10100	20036	20036	20036	20036	20036
10204	20035	150	0	0	0	0	0	0	0	61	10000	19862	25	20100	20100	10100	1305121	0	49	16955	0	20035	20035	18581	3	18720	10100	10200	20200	20035	41	1	1	10201	100	99	100	10100	100	0	0	0	0	0	0	0	710	2	39	2	2	19922	20000	10100	20036	20036	20036	20036	20036
10204	20035	150	0	0	0	0	0	0	0	61	10000	19862	25	20100	20100	10100	1305121	1	49	16955	0	20035	20035	18581	3	18720	10100	10200	20200	20035	41	1	1	10201	100	99	100	10100	100	0	0	0	0	0	0	0	710	2	39	2	2	19922	20000	10100	20036	20036	20036	20036	20036
10204	20035	150	0	0	0	0	0	0	0	61	10000	19862	25	20100	20100	10100	1305121	0	49	16955	0	20035	20035	18581	3	18720	10100	10200	20200	20035	41	1	1	10201	100	99	100	10100	100	0	0	0	0	0	1266	0	710	2	39	2	2	19922	20000	10100	20036	20036	20036	20036	20036
10204	20035	150	0	0	0	0	0	0	0	251	10000	19862	25	20100	20100	10100	1305121	0	49	16955	0	20035	20035	18581	3	18720	10100	10200	20200	20035	41	1	1	10201	100	99	100	10100	100	0	0	0	0	0	0	0	710	2	39	2	2	19922	20000	10100	20036	20036	20036	20036	20036
10204	20035	150	0	0	0	0	0	0	0	2869	10000	19862	25	20100	20100	10100	1305121	1	49	16955	0	20035	20035	18581	3	18720	10100	10200	20200	20035	41	1	1	10201	100	99	100	10100	100	0	0	0	0	0	0	0	710	2	39	2	2	19922	20000	10100	20036	20036	20036	20036	20036

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0035

All non-zero counters (first 10 of 64 runs)

retire uop (01)	cycle (02)	03	mmu table walk data (08)	l2 tlb miss data (0b)	18	19	1e	1f	3f	4c	4d	51	schedule uop (52)	schedule int uop (53)	dispatch int uop (56)	int uops in schedulers (59)	60	69	6a	6d	6e	map stall dispatch (70)	map rewind (75)	map stall (76)	dispatch uop (78)	map int uop (7c)	map int uop inputs (7f)	82	83	flush restart other nonspec (84)	85	inst all (8c)	inst branch (8d)	inst branch taken (90)	inst branch cond (94)	inst int alu (97)	9f	l1d tlb access (a0)	l1d tlb miss (a1)	ld unit uop (a6)	l1d cache writeback (a8)	a9	ac	c2	cf	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? int output thing (e9)	? int retires (ef)	f5	f6	f7	f8	fd
10024	20035	150	0	0	0	0	0	0	61	10000	19862	25	20010	20010	10010	1305229	0	49	16955	20035	20035	18603	3	18740	10010	10020	20020	20035	41	1	1	10021	10	9	10	10010	10	0	0	0	0	0	21	0	640	2	41	2	2	19930	20000	10010	20036	20036	20036	20036	20036
10024	20035	150	0	0	0	0	0	0	61	10000	19862	25	20010	20010	10010	1305229	0	49	16955	20035	20035	18603	3	18740	10010	10020	20020	20035	41	1	1	10021	10	9	10	10010	10	0	0	0	0	0	0	0	640	2	41	2	2	19930	20000	10010	20036	20036	20036	20036	20036
10024	20035	150	0	0	0	0	0	0	61	10000	19862	25	20010	20010	10010	1305229	1	49	16955	20035	20035	18603	3	18740	10010	10020	20020	20035	41	1	1	10021	10	9	10	10010	10	0	0	0	8	0	21	0	640	2	41	2	2	19930	20000	10010	20036	20036	20036	20036	20036
10024	20035	150	0	0	0	0	0	0	61	10000	19862	25	20010	20010	10010	1305229	0	49	16955	20035	20035	18603	3	18740	10010	10020	20020	20035	41	1	1	10021	10	9	10	10010	10	0	0	0	0	0	0	0	640	2	41	2	2	19930	20000	10010	20036	20036	20036	20036	20036
10024	20035	150	0	0	0	0	0	0	61	10000	19862	25	20010	20010	10010	1305229	1	49	16955	20035	20035	18603	3	18740	10010	10020	20020	20035	41	1	1	10021	10	9	10	10010	10	0	0	0	0	0	0	0	640	2	41	2	2	19930	20000	10010	20036	20036	20036	20036	20036
10024	20035	150	0	0	0	0	0	0	61	10000	19862	25	20010	20010	10010	1305229	0	49	16955	20035	20035	18603	3	18740	10010	10020	20196	20035	41	1	1	10021	10	9	10	10010	10	0	0	0	0	0	0	0	640	2	41	2	2	19930	20000	10010	20036	20036	20036	20036	20036
10024	20035	150	0	0	0	0	0	0	61	10000	19862	25	20010	20010	10010	1305229	1	49	16955	20035	20035	18603	3	18740	10010	10020	20020	20035	41	1	1	10021	10	9	10	10010	10	0	0	0	1	0	0	0	640	2	41	2	2	19930	20000	10010	20036	20036	20036	20036	20036
10024	20035	150	0	0	0	0	0	0	61	10000	19862	25	20010	20010	10010	1305229	0	49	16955	20035	20035	18603	3	18740	10010	10020	20020	20035	41	1	1	10021	10	9	10	10010	10	0	0	0	1	0	0	0	640	2	41	2	2	19930	20000	10010	20036	20036	20036	20036	20036
10024	20035	150	0	0	0	0	0	0	61	10000	19862	25	20010	20010	10010	1305229	0	49	16955	20035	20035	18603	3	18740	10010	10020	20020	20035	41	1	1	10021	10	9	10	10010	10	0	0	0	0	0	0	0	640	2	41	2	2	19930	20000	10010	20036	20036	20036	20036	20036
10024	20035	150	0	0	0	0	0	0	61	10000	19862	25	20010	20010	10010	1305229	0	49	16955	20035	20035	18603	3	18740	10010	10020	20020	20035	41	1	1	10021	10	9	10	10010	10	0	0	0	2	0	9	0	640	2	41	2	2	19930	20000	10010	20036	20036	20036	20221	20036

Test 4: Latency 4->2

Chain cycles: 1

Code:

  subs x0, x1, w2, sxtw
  cset x1, cc

Initialization

  mov x0, 1
  mov x1, 2
  mov x2, 3
  mov x3, 4
  mov x4, 5

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code, minus 1 chain cycle): 2.0035

All non-zero counters (first 10 of 64 runs)

retire uop (01)	cycle (02)	03	l1i tlb fill (04)	19	1e	3f	4c	4d	51	schedule uop (52)	schedule int uop (53)	dispatch int uop (56)	int uops in schedulers (59)	60	69	6a	6d	6e	map stall dispatch (70)	map rewind (75)	map stall (76)	dispatch uop (78)	map int uop (7c)	map int uop inputs (7f)	82	83	flush restart other nonspec (84)	85	inst all (8c)	inst branch (8d)	inst branch taken (90)	inst branch cond (94)	inst int alu (97)	9f	ac	branch cond mispred nonspec (c5)	branch mispred nonspec (cb)	cd	cf	map dispatch bubble (d6)	e0	? int output thing (e9)	? int retires (ef)	f5	f6	f7	f8	fd
20204	30035	225	1	0	0	61	10000	29899	25	30100	30100	20107	1956240	0	49	26955	30035	30035	27391	7	27486	20107	20224	30236	30035	85	1	1	20201	100	99	100	20100	10100	0	1	1	1	1320	16	29982	30000	20100	30036	30036	30036	30036	30036
20204	30035	225	0	0	0	251	10000	29899	25	30100	30100	20107	1956240	0	49	26955	30035	30035	27391	7	27486	20107	20224	30236	30035	85	1	1	20201	100	99	100	20100	10100	0	1	1	1	1319	16	29982	30000	20100	30036	30036	30036	30036	30036
20204	30035	225	0	0	0	61	10000	29899	25	30100	30100	20107	1956240	0	49	26955	30035	30035	27391	7	27486	20107	20224	30236	30035	85	1	1	20201	100	99	100	20100	10100	0	1	1	1	1319	16	29983	30000	20100	30036	30036	30036	30036	30036
20204	30035	225	0	0	0	61	10000	29899	25	30100	30100	20185	1956240	0	49	26955	30035	30035	27391	8	27486	20107	20224	30236	30035	85	1	1	20201	100	99	100	20100	10100	0	1	1	1	1319	16	29982	30000	20100	30036	30036	30036	30036	30036
20204	30035	225	0	0	0	124	10000	29899	25	30100	30100	20107	1956240	0	49	26955	30035	30035	27391	8	27486	20107	20224	30236	30035	85	1	1	20201	100	99	100	20100	10100	0	1	1	1	1319	16	29983	30000	20100	30036	30036	30036	30036	30036
20204	30035	224	0	0	9	61	10000	29899	25	30100	30100	20107	1956240	0	49	26955	30035	30035	27391	7	27485	20107	20224	30236	30035	85	1	1	20201	100	99	100	20100	10100	0	1	1	1	1319	16	29982	30000	20100	30036	30036	30036	30036	30036
20204	30035	224	0	0	0	61	10000	29899	25	30100	30100	20107	1956240	0	49	26955	30035	30035	27391	8	27486	20107	20224	30236	30035	85	1	1	20201	100	99	100	20100	10100	0	1	1	1	1319	16	29982	30000	20100	30036	30036	30036	30036	30036
20204	30035	225	0	0	0	61	10000	29899	25	30100	30100	20107	1956240	0	49	26955	30035	30035	27391	8	27486	20107	20224	30236	30035	85	1	1	20201	100	99	100	20100	10100	0	1	1	1	1319	16	29982	30000	20100	30036	30036	30036	30036	30036
20204	30035	225	0	0	0	599	10000	29899	25	30100	30100	20107	1956240	0	49	26955	30035	30035	27391	7	27486	20107	20224	30236	30035	85	1	1	20201	100	99	100	20100	10100	0	1	1	1	1319	16	29983	30000	20100	30036	30036	30036	30036	30036
20204	30035	224	0	0	0	61	10000	29899	25	30100	30100	20107	1956240	0	49	26955	30035	30035	27391	8	27485	20107	20224	30236	30035	85	1	1	20201	100	99	100	20100	10100	0	1	1	1	1319	16	29982	30000	20100	30036	30036	30036	30036	30036

1000 unrolls and 10 iterations

Result (median cycles for code, minus 1 chain cycle): 2.0035

All non-zero counters (first 10 of 64 runs)

retire uop (01)	cycle (02)	03	mmu table walk data (08)	18	1e	3f	4c	4d	51	schedule uop (52)	schedule int uop (53)	dispatch int uop (56)	int uops in schedulers (59)	60	69	6a	6d	6e	map stall dispatch (70)	map rewind (75)	map stall (76)	dispatch uop (78)	map int uop (7c)	map int uop inputs (7f)	82	83	flush restart other nonspec (84)	85	inst all (8c)	inst branch (8d)	inst branch taken (90)	inst branch cond (94)	inst int alu (97)	9f	ld unit uop (a6)	l1d cache writeback (a8)	ac	c2	branch mispred nonspec (cb)	cf	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? int output thing (e9)	? int retires (ef)	f5	f6	f7	f8	fd
20024	30035	225	0	0	0	871	10000	29891	25	30010	30010	20010	1956289	0	49	26955	30035	30035	27391	3	27498	20010	20020	30020	30035	85	1	1	20021	10	9	10	20010	10010	0	0	0	0	0	1270	2	33	1	1	29959	30000	20010	30036	30036	30036	30036	30036
20024	30035	225	0	0	0	61	10000	29891	25	30032	30032	20010	1956289	0	49	26955	30035	30035	27391	3	27498	20010	20020	30020	30035	85	1	1	20021	10	9	10	20010	10010	0	0	0	0	1	1270	1	33	1	1	29959	30000	20010	30036	30036	30036	30036	30036
20024	30035	225	0	0	3	149	10006	29891	25	30010	30010	20010	1956289	1	49	26955	30035	30035	27391	3	27498	20010	20020	30020	30035	85	1	1	20021	10	9	10	20010	10010	0	0	0	0	0	1270	1	33	1	1	29959	30000	20010	30036	30036	30036	30036	30036
20024	30035	224	0	0	0	805	10000	29891	25	30010	30010	20010	1956289	0	49	26955	30035	30035	27391	3	27498	20010	20020	30020	30035	85	1	1	20021	10	9	10	20010	10010	0	0	0	0	0	1270	1	33	1	1	29959	30000	20010	30036	30036	30036	30036	30036
20024	30035	225	0	0	0	871	10000	29891	25	30010	30010	20010	1956289	0	49	26955	30035	30035	27391	3	27498	20010	20020	30020	30035	85	1	1	20021	10	9	10	20010	10010	0	0	0	0	0	1270	1	33	1	2	29959	30000	20010	30036	30036	30036	30036	30036
20024	30035	225	0	0	0	145	10000	29891	25	30010	30010	20010	1956289	0	49	26955	30035	30035	27391	3	27498	20010	20020	30020	30035	85	1	1	20021	10	9	10	20010	10010	0	0	0	0	0	1270	1	33	1	1	29959	30000	20010	30036	30036	30036	30036	30036
20024	30035	225	0	0	6	103	10000	29891	25	30010	30010	20010	1956289	0	49	26955	30035	30035	27391	3	27498	20010	20020	30020	30035	85	1	1	20021	10	9	10	20010	10010	2	0	985	0	0	1270	1	41	1	2	29959	30000	20010	30036	30036	30036	30036	30036
20024	30035	225	0	0	0	61	10000	29891	25	30010	30010	20010	1956289	0	49	26955	30081	30035	27391	3	27525	20010	20199	30152	30035	85	1	1	20021	10	9	10	20010	10010	0	0	0	0	0	1270	1	33	1	1	29959	30000	20010	30036	30036	30036	30036	30036
20024	30035	224	0	0	0	61	10000	29891	25	30010	30010	20010	1956289	1	49	26955	30035	30035	27391	3	27498	20010	20020	30020	30035	85	1	1	20021	10	9	10	20010	10010	0	0	0	0	0	1270	1	33	1	1	29959	30000	20010	30036	30036	30036	30036	30036
20024	30035	225	0	0	0	61	10000	29891	25	30010	30010	20010	1956289	0	49	26955	30035	30035	27391	3	27498	20010	20020	30020	30035	85	1	1	20021	10	9	10	20010	10010	0	1	0	9	0	1270	1	33	1	2	29959	30000	20010	30036	30036	30036	30036	30036

Test 5: Latency 4->3

Chain cycles: 1

Code:

  subs x0, x1, w2, sxtw
  cset x2, cc

Initialization

  mov x0, 1
  mov x1, 2
  mov x2, 3
  mov x3, 4
  mov x4, 5

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code, minus 1 chain cycle): 2.0035

All non-zero counters (first 10 of 64 runs)

retire uop (01)	cycle (02)	03	09	18	19	1e	1f	3f	4c	4d	51	schedule uop (52)	schedule int uop (53)	dispatch int uop (56)	int uops in schedulers (59)	60	69	6a	6d	6e	map stall dispatch (70)	map rewind (75)	map stall (76)	dispatch uop (78)	map int uop (7c)	map int uop inputs (7f)	82	83	flush restart other nonspec (84)	85	inst all (8c)	inst branch (8d)	inst branch taken (90)	inst branch cond (94)	inst int alu (97)	9f	branch cond mispred nonspec (c5)	branch mispred nonspec (cb)	cd	cf	map dispatch bubble (d6)	e0	? int output thing (e9)	? int retires (ef)	f5	f6	f7	f8	fd
20204	30035	225	0	0	0	48	0	61	10000	29899	25	30100	30100	20107	1956240	0	49	26955	30035	30035	27391	7	27486	20107	20224	30236	30035	85	1	1	20201	100	99	100	20100	10100	1	1	1	1319	16	29982	30000	20100	30036	30036	30036	30036	30036
20204	30035	225	0	0	0	0	0	61	10000	29899	25	30100	30100	20107	1956240	0	49	26955	30035	30035	27391	7	27485	20107	20224	30236	30066	85	1	1	20201	100	99	100	20100	10100	1	1	1	1320	16	30022	30000	20100	30036	30036	30036	30036	30036
20204	30035	225	0	0	0	0	0	61	10000	29899	25	30100	30100	20107	1956240	1	49	26955	30035	30035	27391	7	27486	20107	20224	30236	30035	85	1	1	20201	100	99	100	20100	10100	1	1	1	1320	16	29982	30000	20100	30036	30036	30036	30036	30036
20204	30035	224	0	0	0	0	0	61	10000	29899	25	30100	30100	20107	1956240	0	49	26955	30035	30035	27391	7	27486	20107	20224	30236	30035	85	1	1	20201	100	99	100	20100	10100	1	1	1	1319	16	29982	30000	20100	30036	30036	30036	30036	30036
20204	30035	225	0	0	0	9	88	61	10000	29899	25	30100	30100	20107	1956240	0	49	26955	30035	30035	27391	7	27486	20107	20224	30236	30035	85	2	1	20201	100	99	100	20100	10100	1	1	1	1319	16	29983	30000	20100	30036	30036	30036	30036	30036
20204	30067	224	0	0	0	0	0	61	10000	29899	25	30100	30100	20107	1956240	1	49	26955	30035	30035	27391	7	27486	20107	20224	30236	30035	85	1	1	20201	100	99	100	20100	10100	1	1	1	1319	16	29982	30000	20100	30036	30036	30036	30036	30036
20204	30035	225	0	0	0	12	0	81	10000	29899	25	30100	30100	20107	1956240	1	49	26955	30035	30035	27391	7	27485	20107	20224	30236	30035	85	1	1	20201	100	99	100	20100	10100	1	1	1	1319	16	29983	30000	20100	30036	30036	30036	30036	30036
20204	30035	225	1	0	0	24	0	61	10000	29899	25	30100	30100	20107	1956240	1	49	26955	30035	30035	27391	8	27485	20107	20224	30236	30035	85	1	1	20201	100	99	100	20100	10100	1	1	1	1320	16	29983	30000	20100	30036	30036	30036	30036	30036
20204	30035	224	0	0	0	30	0	61	10000	29899	25	30100	30100	20107	1956240	0	49	26955	30035	30035	27391	7	27486	20107	20224	30236	30035	85	1	1	20201	100	99	100	20100	10100	1	1	1	1319	16	29983	30000	20100	30036	30036	30036	30036	30036
20204	30035	225	0	0	3	198	0	61	10000	29899	25	30100	30100	20107	1956240	0	49	26955	30035	30035	27391	8	27486	20107	20224	30236	30035	85	1	1	20201	100	99	100	20100	10100	1	1	1	1319	16	29982	30000	20100	30036	30036	30036	30036	30081

1000 unrolls and 10 iterations

Result (median cycles for code, minus 1 chain cycle): 2.0035

All non-zero counters (first 10 of 64 runs)

retire uop (01)	cycle (02)	03	19	1e	1f	3f	4c	4d	51	schedule uop (52)	schedule int uop (53)	dispatch int uop (56)	int uops in schedulers (59)	60	69	6a	6d	6e	map stall dispatch (70)	map rewind (75)	map stall (76)	dispatch uop (78)	map int uop (7c)	map int uop inputs (7f)	82	83	flush restart other nonspec (84)	85	inst all (8c)	inst branch (8d)	inst branch taken (90)	inst branch cond (94)	inst int alu (97)	9f	l1d cache writeback (a8)	ac	cf	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? int output thing (e9)	? int retires (ef)	f5	f6	f7	f8	fd
20024	30035	224	0	0	0	61	10000	29891	25	30010	30010	20010	1956289	0	49	26955	30035	30035	27391	3	27498	20010	20020	30020	30035	85	1	1	20021	10	9	10	20010	10010	0	0	1270	1	33	3	2	29959	30000	20010	30036	30036	30036	30036	30036
20024	30035	225	0	0	0	61	10000	29891	25	30010	30010	20010	1956289	0	49	26955	30035	30035	27391	3	27498	20010	20020	30020	30035	85	1	1	20021	10	9	10	20010	10010	0	0	1270	2	33	2	2	29959	30000	20010	30036	30036	30036	30036	30036
20024	30035	224	0	0	0	61	10000	29897	25	30010	30010	20010	1956289	0	49	26955	30035	30035	27391	3	27498	20010	20020	30020	30035	85	1	1	20021	10	9	10	20010	10010	0	0	1270	2	33	2	2	29959	30000	20010	30036	30036	30036	30036	30036
20024	30035	225	0	0	0	61	10000	29891	25	30010	30010	20010	1956289	0	49	26955	30035	30035	27391	3	27498	20010	20020	30020	30035	85	1	1	20021	10	9	10	20010	10010	0	0	1270	1	33	1	2	29959	30000	20010	30036	30036	30036	30036	30036
20024	30035	225	0	0	0	61	10000	29891	25	30010	30010	20010	1956289	0	49	26955	30035	30035	27391	3	27498	20010	20020	30020	30035	85	1	1	20021	10	9	10	20010	10010	0	0	1270	1	33	2	2	29959	30000	20010	30036	30036	30067	30036	30036
20024	30035	225	0	0	0	61	10000	29891	25	30010	30010	20010	1956289	0	49	26955	30035	30035	27391	3	27498	20010	20020	30020	30035	85	1	1	20021	10	9	10	20010	10010	0	0	1270	1	33	2	2	29959	30000	20010	30036	30036	30036	30036	30036
20024	30035	225	0	0	0	61	10000	29891	25	30010	30010	20010	1956289	1	49	26955	30035	30035	27391	3	27498	20010	20020	30020	30035	85	1	1	20021	10	9	10	20010	10010	0	0	1270	1	33	2	2	29959	30000	20010	30036	30036	30036	30036	30036
20024	30035	225	0	0	0	61	10000	29891	25	30010	30010	20010	1956289	0	49	26955	30035	30035	27391	3	27498	20010	20020	30020	30035	85	1	1	20021	10	9	10	20010	10010	0	0	1270	3	33	2	2	29959	30000	20010	30036	30036	30036	30036	30036
20024	30035	225	0	0	0	61	10000	29891	25	30010	30010	20010	1956289	0	49	26955	30035	30035	27391	3	27498	20010	20020	30188	30035	85	1	1	20021	10	9	10	20010	10010	0	0	1270	2	33	2	2	29959	30000	20010	30036	30036	30036	30036	30036
20024	30035	225	0	0	0	61	10000	29891	25	30010	30010	20010	1956289	0	49	26955	30035	30035	27391	3	27498	20010	20020	30020	30035	85	1	1	20021	10	9	10	20010	10010	1	0	1270	1	33	2	2	29959	30000	20010	30036	30036	30036	30036	30036

Test 6: throughput

Count: 8

Code:

  subs x0, x8, w9, sxtw
  subs x1, x8, w9, sxtw
  subs x2, x8, w9, sxtw
  subs x3, x8, w9, sxtw
  subs x4, x8, w9, sxtw
  subs x5, x8, w9, sxtw
  subs x6, x8, w9, sxtw
  subs x7, x8, w9, sxtw

Initialization

  mov x8, 9
  mov x9, 10
  mov x10, 11

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.6676

All non-zero counters (first 10 of 64 runs)

retire uop (01)	cycle (02)	03	18	19	1e	3f	4c	4d	51	schedule uop (52)	schedule int uop (53)	dispatch int uop (56)	int uops in schedulers (59)	60	69	6a	6d	6e	map stall dispatch (70)	flags prf full (73)	map rewind (75)	map stall (76)	dispatch uop (78)	map int uop (7c)	map int uop inputs (7f)	82	83	flush restart other nonspec (84)	85	inst all (8c)	inst branch (8d)	inst branch taken (90)	inst branch cond (94)	inst int alu (97)	9f	l1d cache writeback (a8)	ac	branch cond mispred nonspec (c5)	branch mispred nonspec (cb)	cd	cf	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? int output thing (e9)	? int retires (ef)	f5	f6	f7	f8	fd
80204	53447	400	0	4	54	28	80013	48791	28	160137	160137	80276	3442831	1	49	50334	53414	53414	43345	2909	8	43355	80176	80288	160376	53414	39	1	1	80201	100	99	100	80100	100	0	0	1	1	1	5124	2	16	0	0	53411	160037	80100	53415	53415	53415	53415	53415
80204	53414	400	0	0	0	693	80013	48791	29	160137	160137	80176	3441890	1	49	50334	53414	53414	43345	2909	8	43355	80176	80288	160376	53414	39	1	1	80201	100	99	100	80100	100	0	0	1	1	1	5124	0	16	0	0	53411	160037	80100	53415	53415	53415	53415	53415
80204	53414	400	0	0	0	28	80013	48791	29	160137	160137	80176	3441890	0	49	50334	53414	53414	43345	2909	8	43355	80176	80288	160376	53414	39	1	1	80201	100	99	100	80100	100	0	0	1	1	1	5124	0	16	0	0	53410	160037	80100	53415	53415	53415	53415	53415
80204	53414	400	0	0	0	28	80013	48791	29	160137	160137	80176	3441890	0	49	50334	53414	53414	43345	2909	8	43355	80176	80288	160376	53414	39	1	1	80201	100	99	100	80100	100	0	0	1	1	1	5124	0	16	0	0	53411	160037	80100	53415	53415	53415	53415	53415
80204	53414	399	0	0	0	28	80013	48791	29	160137	160137	80176	3441890	0	49	50334	53414	53414	43345	2909	3	43360	80100	80200	160200	53410	39	1	1	80201	100	99	100	80100	100	0	0	0	0	0	5110	1	24	1	1	53390	160000	80100	53411	53411	53411	53411	53411
80204	53410	400	2	0	3	61	80000	48741	25	160100	160100	80203	3440005	0	49	50330	53410	53410	43298	3024	3	43360	80100	80200	160200	53410	39	1	1	80201	100	99	100	80100	100	0	0	0	0	0	5110	1	24	1	1	53390	160000	80100	53411	53411	53411	53411	53411
80204	53410	400	0	0	0	61	80000	48741	25	160100	160100	80100	3440005	0	49	50330	53410	53410	43298	2909	3	43360	80100	80200	160200	53410	39	1	1	80201	100	99	100	80100	100	0	0	0	0	0	5110	1	24	1	1	53456	160000	80100	53411	53411	53411	53411	53411
80204	53410	400	0	0	162	61	80000	48741	25	160100	160100	80100	3440005	0	49	50330	53410	53410	43298	2909	3	43360	80100	80200	160200	53410	39	1	1	80201	100	99	100	80100	100	0	0	0	0	0	5110	1	24	1	1	53390	160000	80100	53411	53411	53411	53411	53411
80204	53410	399	0	0	0	61	80000	48741	25	160100	160100	80100	3440005	0	49	50330	53410	53410	43298	2909	3	43360	80100	80200	160200	53410	39	1	1	80201	100	99	100	80100	100	0	0	0	0	0	5110	1	24	1	1	53390	160000	80100	53411	53411	53411	53411	53411
80204	53410	400	0	0	0	61	80000	48741	25	160100	160100	80100	3440005	0	49	50330	53410	53410	43298	3024	3	43360	80100	80200	160200	53410	39	1	1	80201	100	99	100	80100	100	0	0	0	0	0	5110	1	24	1	1	53390	160000	80100	53411	53411	53411	53411	53411

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.6673

All non-zero counters (first 10 of 64 runs)

retire uop (01)	cycle (02)	03	mmu table walk data (08)	l2 tlb miss data (0b)	18	19	1e	1f	3f	4c	4d	51	schedule uop (52)	schedule int uop (53)	dispatch int uop (56)	int uops in schedulers (59)	60	69	6a	6d	6e	map stall dispatch (70)	flags prf full (73)	map rewind (75)	map stall (76)	dispatch uop (78)	map int uop (7c)	map int uop inputs (7f)	82	83	flush restart other nonspec (84)	85	inst all (8c)	inst branch (8d)	inst branch taken (90)	inst branch cond (94)	inst int alu (97)	9f	l1d tlb access (a0)	ld unit uop (a6)	st unit uop (a7)	l1d cache writeback (a8)	ac	branch cond mispred nonspec (c5)	cf	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? int output thing (e9)	? int retires (ef)	f5	f6	f7	f8	fd
80024	53401	400	0	0	0	0	9	0	61	80000	47946	25	160010	160010	80010	3438130	0	49	50300	53380	53380	43290	3251	3	43352	80010	80020	160020	53380	39	1	1	80021	10	9	10	80010	10	0	0	0	0	0	0	5020	8	24	5	3	53360	160000	80010	53381	53381	53381	53381	53381
80024	53380	400	0	0	0	0	0	0	61	80000	47946	25	160010	160010	80010	3438130	0	49	50300	53380	53380	43290	3251	3	43352	80010	80020	160020	53380	39	1	1	80021	10	9	10	80010	10	0	0	0	0	0	0	5020	3	24	4	5	53360	160000	80010	53381	53381	53381	53381	53381
80024	53380	399	0	0	0	0	0	0	61	80000	47946	25	160010	160010	80010	3438130	1	49	50300	53380	53380	43290	3251	3	43352	80010	80020	160020	53380	39	1	1	80021	10	9	10	80010	10	0	0	0	0	0	0	5020	3	24	5	6	53360	160000	80010	53381	53381	53381	53381	53381
80024	53380	400	0	0	0	0	0	0	61	80000	47946	25	160010	160010	80010	3438130	0	49	50300	53380	53380	43290	3251	3	43352	80010	80020	160020	53380	39	1	1	80021	10	9	10	80010	10	0	0	0	0	3	0	5020	3	24	3	5	53360	160000	80010	53381	53381	53381	53381	53381
80024	53380	400	0	0	0	0	0	0	61	80000	47946	25	160010	160010	80010	3438130	1	49	50300	53380	53380	43290	2936	3	43352	80010	80020	160020	53380	39	1	1	80021	10	9	10	80010	10	0	0	0	0	0	0	5020	5	31	5	4	53360	160000	80010	53381	53381	53381	53381	53381
80024	53380	399	0	0	1	1	0	0	726	80000	47946	25	160010	160010	80010	3438130	1	49	50300	53380	53380	43290	3251	3	43352	80010	80020	160020	53380	39	1	1	80021	10	9	10	80010	10	0	0	0	0	0	0	5025	5	24	5	5	53360	160000	80010	53381	53437	53381	53381	53381
80024	53380	399	0	0	0	0	0	0	61	80000	47946	25	160010	160010	80010	3438130	1	49	50300	53380	53380	43290	3251	3	43352	80010	80132	160020	53380	39	1	1	80021	10	9	10	80010	10	0	0	0	0	0	0	5020	3	24	3	5	53360	160000	80010	53381	53381	53381	53381	53381
80024	53380	399	0	0	0	0	9	0	61	80000	47946	25	160010	160010	80010	3438130	0	49	50300	53380	53380	43290	2936	3	43352	80010	80020	160020	53380	39	1	1	80021	10	9	10	80010	10	0	0	0	0	0	0	5020	5	24	5	6	53360	160000	80010	53381	53381	53381	53381	53381
80024	53380	400	0	0	0	0	0	0	61	80000	47946	25	160010	160010	80010	3438130	0	49	50300	53380	53380	43290	2936	3	43352	80010	80020	160020	53380	39	1	1	80021	10	9	10	80010	10	0	3	1	2	0	0	5020	3	24	6	4	53360	160000	80010	53381	53381	53381	53381	53381
80025	53380	400	0	0	0	0	0	0	82	80000	47946	25	160010	160010	80010	3438130	1	49	50300	53380	53380	43290	3251	3	43352	80010	80020	160020	53380	39	1	1	80021	10	9	10	80010	10	0	0	0	0	0	0	5020	5	24	5	3	53360	160000	80010	53381	53381	53381	53381	53381

SUBS (sxtw, 64-bit)

Test 1: uops

1000 unrolls and 1 iteration

Test 2: Latency 1->2

100 unrolls and 100 iterations

1000 unrolls and 10 iterations

Test 3: Latency 1->3

100 unrolls and 100 iterations

1000 unrolls and 10 iterations

Test 4: Latency 4->2

100 unrolls and 100 iterations

1000 unrolls and 10 iterations

Test 5: Latency 4->3

100 unrolls and 100 iterations

1000 unrolls and 10 iterations

Test 6: throughput

100 unrolls and 100 iterations

1000 unrolls and 10 iterations