Firestorm: SUBS (sxtx, 64-bit) measurements

Code:

  subs x0, x0, x1, sxtx

Initialization

  mov x0, 1
  mov x1, 2

(no loop instructions)

1000 unrolls and 1 iteration

Retires: 1.000

Issues: 1.000

Integer unit issues: 1.000

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 instruction (07)	1e	3f	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)	l1d cache writeback (a8)	cf	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? int output thing (e9)	? int retires (ef)	f5	f6	f7	f8	fd
1004	1035	8	0	0	61	917	25	1000	1000	1000	62250	1	1035	1035	805	3	882	1000	1000	2000	1035	40	1	1	1001	1000	0	73	1	27	1	1	993	1000	1000	1036	1036	1036	1036	1036
1004	1035	7	0	0	61	917	25	1000	1000	1000	62250	0	1035	1035	805	3	882	1000	1000	2000	1035	40	1	1	1001	1000	0	73	1	27	2	1	993	1000	1000	1036	1036	1036	1036	1036
1004	1035	7	0	0	61	917	25	1000	1000	1000	62250	0	1035	1035	805	3	882	1000	1000	2000	1035	43	1	1	1001	1000	0	73	1	27	1	1	993	1000	1000	1036	1036	1036	1036	1036
1004	1035	8	0	54	61	917	25	1000	1000	1000	62250	0	1035	1035	805	3	882	1000	1000	2000	1035	40	1	1	1001	1000	0	73	1	27	1	1	993	1000	1000	1036	1036	1036	1036	1036
1004	1035	7	0	0	61	917	25	1000	1000	1000	62250	0	1035	1035	805	3	909	1000	1000	2000	1035	40	1	1	1001	1000	0	73	1	27	1	1	993	1000	1000	1036	1036	1036	1036	1036
1004	1035	8	0	0	61	917	25	1000	1000	1000	62250	1	1035	1035	805	3	882	1000	1000	2000	1035	40	1	1	1001	1000	0	73	1	27	1	1	993	1000	1000	1036	1036	1036	1036	1036
1004	1035	8	0	0	61	917	25	1000	1000	1000	62250	1	1035	1035	805	3	882	1000	1000	2000	1035	40	1	1	1001	1000	0	73	1	27	1	1	993	1000	1000	1036	1036	1036	1036	1036
1004	1035	8	0	0	61	917	25	1000	1000	1000	62250	1	1035	1035	805	3	882	1000	1000	2000	1035	43	1	1	1001	1000	0	73	1	27	1	1	993	1000	1000	1036	1036	1036	1036	1036
1004	1035	8	0	0	61	917	25	1000	1000	1000	62250	1	1035	1035	805	3	882	1000	1000	2000	1035	40	1	1	1001	1000	0	73	1	27	1	1	993	1000	1000	1036	1036	1036	1036	1036
1004	1035	8	0	9	61	917	25	1000	1000	1000	62250	1	1035	1035	805	3	882	1000	1000	2000	1035	40	1	1	1001	1000	0	73	1	27	1	1	993	1000	1000	1036	1036	1036	1036	1036

Test 2: Latency 1->2

Code:

  subs x0, x0, x1, sxtx

Initialization

  mov x0, 1
  mov x1, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 1.0035

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	1e	3f	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 miss (a1)	l1d cache writeback (a8)	ac	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
10204	10035	75	0	0	0	528	61	9920	25	10100	10100	10100	647152	0	49	6955	10035	10035	8656	3	8732	10100	10200	20200	10035	40	1	1	10201	100	99	100	10100	100	0	0	0	0	710	1	27	1	2	9995	10000	10100	10036	10036	10036	10036	10036
10204	10035	76	0	0	0	159	61	9920	25	10100	10100	10100	647152	1	49	6955	10035	10035	8656	3	8732	10100	10200	20200	10035	40	1	1	10201	100	99	100	10100	100	0	0	0	0	710	1	27	1	1	9995	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	0	0	0	206	9920	25	10100	10100	10100	647152	0	49	6955	10035	10035	8656	3	8732	10100	10200	20200	10035	40	1	1	10201	100	99	100	10100	100	0	0	0	1	710	1	27	1	1	9995	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	0	0	12	61	9920	25	10100	10100	10100	647152	0	49	6955	10035	10035	8656	3	8732	10100	10200	20200	10035	40	1	1	10201	100	99	100	10100	100	0	0	0	0	710	1	27	1	1	9995	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	0	0	3	61	9920	25	10100	10100	10100	647152	1	49	6955	10035	10035	8656	3	8732	10100	10200	20200	10035	40	1	1	10201	100	99	100	10100	100	0	0	0	0	710	1	27	1	1	9995	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	0	0	12	61	9920	25	10100	10100	10100	647152	0	49	6955	10035	10035	8656	3	8732	10100	10200	20200	10035	40	1	1	10201	100	99	100	10100	100	0	0	0	0	710	1	27	1	1	9995	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	0	0	0	61	9920	25	10100	10100	10100	647152	0	49	6955	10035	10035	8656	3	8732	10100	10200	20200	10035	40	1	1	10201	100	99	100	10100	100	0	0	0	0	710	1	27	1	1	9995	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	0	0	0	609	9920	25	10100	10100	10100	647152	0	49	6955	10035	10035	8656	3	8732	10100	10200	20200	10035	40	1	1	10201	100	99	100	10100	100	0	0	0	0	710	1	27	1	1	9995	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	0	0	0	61	9920	25	10100	10100	10100	647152	0	49	6955	10035	10035	8656	3	8732	10100	10200	20200	10035	40	1	1	10201	100	99	100	10100	100	0	0	0	0	710	1	27	1	1	9995	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	0	0	0	61	9920	25	10100	10100	10100	647152	0	49	6955	10035	10035	8656	3	8732	10100	10200	20200	10035	40	1	1	10201	100	99	100	10100	100	0	0	0	0	710	1	27	1	1	9995	10000	10100	10036	10036	10036	10036	10036

1000 unrolls and 10 iterations

Result (median cycles for code): 1.0035

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

retire uop (01)	cycle (02)	03	1e	3f	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
10024	10035	75	0	61	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	20020	10035	40	1	1	10021	10	9	10	10010	10	0	0	640	3	27	2	2	9997	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	281	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	20020	10035	40	1	1	10021	10	9	10	10010	10	0	0	640	2	27	2	2	9997	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	269	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	20020	10035	40	1	1	10021	10	9	10	10010	10	0	0	640	2	27	2	2	9997	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	672	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	20020	10035	40	1	1	10021	10	9	10	10010	10	0	0	640	2	27	2	2	9997	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	549	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	20020	10035	40	1	1	10021	10	9	10	10010	10	0	0	640	2	27	2	2	9997	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	61	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	20020	10035	40	1	1	10021	10	9	10	10010	10	0	0	640	2	27	2	2	9997	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	728	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	20020	10035	40	1	1	10021	10	9	10	10010	10	0	0	640	2	27	2	2	9997	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	61	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	20020	10035	40	1	1	10021	10	9	10	10010	10	2	3	640	2	27	2	2	9997	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	61	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	20020	10035	40	1	1	10021	10	9	10	10010	10	0	0	640	2	27	2	2	9997	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	61	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	20020	10035	40	1	1	10021	10	9	10	10010	10	0	0	640	2	27	2	2	9997	10000	10010	10036	10036	10036	10036	10036

Test 3: Latency 1->3

Code:

  subs x0, x1, x0, sxtx

Initialization

  mov x0, 1
  mov x1, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 1.0035

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

retire uop (01)	cycle (02)	03	1e	3f	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)	ac	cf	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? int output thing (e9)	? int retires (ef)	f5	f6	f7	f8	fd
10204	10035	75	528	61	9920	25	10100	10100	10100	647152	1	49	6955	10035	10035	8656	3	8732	10100	10200	20200	10035	40	1	1	10201	100	99	100	10100	100	0	0	710	2	27	2	2	9995	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	611	9920	25	10100	10100	10100	647152	0	49	6955	10035	10035	8656	3	8732	10100	10200	20200	10035	40	1	1	10201	100	99	100	10100	100	0	0	710	2	27	2	2	9995	10000	10100	10036	10036	10129	10083	10036
10204	10035	75	0	61	9920	25	10100	10100	10100	647152	1	49	6955	10035	10035	8656	3	8732	10100	10200	20200	10035	40	1	1	10201	100	99	100	10100	100	0	0	710	2	27	2	2	9995	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	63	61	9920	25	10100	10100	10100	647152	0	49	6955	10035	10035	8656	3	8732	10100	10200	20200	10035	40	1	1	10201	100	99	100	10100	100	0	0	710	2	27	2	2	9995	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	63	61	9920	25	10100	10100	10100	647152	1	49	6955	10035	10035	8656	3	8732	10100	10200	20200	10035	40	1	1	10201	100	99	100	10100	100	0	0	710	2	27	2	2	9995	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	3	61	9920	25	10100	10100	10100	647152	0	49	6955	10035	10035	8656	3	8732	10100	10200	20200	10035	40	1	1	10201	100	99	100	10100	100	0	0	710	2	27	2	2	9995	10000	10100	10036	10036	10036	10036	10036
10204	10035	76	0	61	9920	25	10100	10100	10100	647152	1	49	6955	10035	10035	8656	3	8732	10100	10200	20200	10035	40	1	1	10201	100	99	100	10100	100	0	0	710	2	27	2	2	9995	10000	10100	10036	10036	10036	10036	10036
10204	10035	76	0	61	9920	25	10100	10100	10100	647152	1	49	6955	10035	10035	8656	3	8732	10100	10200	20200	10035	40	1	1	10201	100	99	100	10100	100	0	0	710	2	27	2	2	9995	10000	10100	10036	10036	10036	10036	10036
10204	10035	76	0	61	9920	25	10100	10100	10100	647152	0	49	6955	10035	10035	8656	3	8732	10100	10200	20200	10035	40	1	1	10201	100	99	100	10100	100	0	0	710	2	27	2	2	9995	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	189	9920	25	10100	10100	10100	647152	0	49	6955	10035	10035	8656	3	8732	10100	10200	20200	10035	40	1	1	10201	100	99	100	10100	100	0	0	710	2	27	2	2	9995	10000	10100	10036	10036	10036	10036	10036

1000 unrolls and 10 iterations

Result (median cycles for code): 1.0035

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

retire uop (01)	cycle (02)	03	mmu table walk instruction (07)	mmu table walk data (08)	l2 tlb miss instruction (0a)	l2 tlb miss data (0b)	18	19	1e	1f	3a	3f	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)	st unit uop (a7)	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	10178	76	0	1	0	1	3	3	408	264	0	861	9917	93	10080	10078	10092	649105	0	49	7097	10177	10177	8711	22	8852	10259	10310	20596	10177	40	4	1	10021	10	9	10	10010	10	2	2	2	0	0	2	2505	0	692	4	51	8	5	10068	10067	10010	10177	10179	10036	10177	10178
10024	10223	76	0	0	0	1	3	3	405	264	0	124	9920	93	10010	10079	10258	649125	1	49	7099	10177	10178	8711	23	8754	10259	10310	20790	10178	40	4	1	10021	10	9	10	10010	10	0	2	0	0	1	0	1638	2	679	4	55	8	9	10131	10068	10010	10178	10165	10179	10179	10178
10024	10176	76	0	0	1	1	1	2	399	264	1	849	9917	94	10100	10102	10258	649126	1	49	7053	10176	10176	8711	23	8860	10257	10309	20598	10131	40	4	1	10021	10	9	10	10010	10	0	0	2	0	1	2	1663	0	694	5	27	4	8	10050	10022	10010	10178	10179	10036	10131	10191
10024	10083	76	0	1	1	0	3	1	0	176	0	103	9918	70	10056	10010	10176	648983	0	49	7050	10131	10131	8678	3	8808	10258	10214	20408	10129	40	3	1	10021	10	9	10	10010	10	0	0	0	1	1	2	1663	0	695	3	42	6	6	10066	10045	10010	10168	10130	10036	10132	10132
10024	10082	76	3	0	0	0	2	1	0	264	0	61	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	20020	10035	40	1	1	10021	10	9	10	10010	10	0	0	0	0	0	0	0	0	640	3	27	3	3	9997	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	0	0	0	0	0	0	0	0	61	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	20020	10035	40	1	1	10021	10	9	10	10010	10	0	0	0	0	0	0	0	0	640	3	27	3	3	9997	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	0	0	0	0	0	0	0	0	61	9918	25	10010	10010	10010	647246	0	49	6955	10035	10035	8678	3	8754	10010	10020	20020	10035	40	1	1	10021	10	9	10	10010	10	0	0	0	0	0	0	0	0	640	3	27	3	3	9997	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	0	0	0	0	0	0	0	0	739	9918	25	10010	10010	10010	647246	0	49	6955	10035	10035	8678	3	8754	10010	10020	20020	10035	40	1	1	10021	10	9	10	10010	10	0	0	0	0	0	0	0	0	640	3	27	3	3	9997	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	0	0	0	0	0	0	0	0	61	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	20020	10035	40	1	1	10021	10	9	10	10010	10	0	0	0	0	0	0	0	0	640	3	27	3	3	9997	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	0	0	0	0	0	0	0	0	678	9918	41	10010	10010	10010	647246	0	49	6955	10035	10035	8678	3	8754	10010	10020	20020	10035	40	1	1	10022	10	9	10	10010	10	0	0	0	0	0	0	15	0	640	3	27	3	3	10052	10000	10010	10036	10036	10036	10036	10036

Test 4: Latency 4->2

Chain cycles: 1

Code:

  subs x0, x1, x2, sxtx
  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): 1.0035

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

retire uop (01)	cycle (02)	03	18	19	1e	3a	3f	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 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
20204	20035	150	0	0	51	0	61	19930	25	20100	20100	20112	1297233	1	49	16955	20035	20035	17425	7	17486	20112	20224	30236	20035	64	1	1	20201	100	99	100	20100	10100	0	0	0	1	1	1	1319	0	16	0	0	20012	20000	20100	20036	20036	20036	20036	20036
20204	20035	150	0	0	0	0	84	19930	25	20100	20100	20112	1297233	1	49	16955	20035	20035	17425	8	17486	20112	20224	30236	20035	64	1	1	20201	100	99	100	20100	10100	2	0	3	1	1	1	1320	0	16	0	0	20012	20000	20100	20036	20036	20036	20036	20082
20204	20035	150	0	0	0	0	349	19930	25	20100	20100	20193	1297233	1	49	16955	20035	20035	17425	8	17485	20112	20224	30236	20035	64	1	1	20201	100	99	100	20100	10100	0	0	0	1	1	1	1320	0	16	0	0	20012	20000	20100	20036	20036	20036	20036	20036
20204	20035	150	1	0	0	0	362	19930	25	20100	20124	20112	1297233	1	49	16955	20035	20035	17425	7	17485	20112	20224	30236	20035	64	1	1	20201	100	99	100	20100	10100	0	0	0	1	1	1	1320	0	16	0	0	20012	20000	20100	20036	20036	20036	20036	20036
20204	20035	150	0	0	0	0	103	19930	25	20100	20100	20112	1297233	1	49	16955	20035	20035	17425	8	17486	20112	20224	30236	20035	64	1	1	20201	100	99	100	20100	10100	0	0	0	1	1	1	1319	0	16	0	0	20012	20000	20100	20036	20036	20036	20036	20036
20204	20035	150	0	0	0	0	61	19930	25	20100	20100	20112	1297233	1	49	16955	20035	20035	17425	7	17486	20112	20224	30236	20035	64	1	1	20201	100	99	100	20100	10100	0	0	0	1	1	1	1320	0	16	0	0	20012	20000	20100	20036	20036	20036	20036	20036
20204	20035	150	0	0	0	0	61	19930	25	20100	20100	20112	1297233	1	49	16955	20035	20035	17425	7	17486	20112	20224	30236	20082	64	1	1	20201	100	99	100	20100	10100	2	0	0	1	1	1	1319	0	16	0	0	20012	20000	20100	20036	20036	20036	20036	20036
20204	20035	150	0	1	18	1	61	19930	25	20100	20122	20112	1297233	1	49	16955	20035	20035	17425	7	17485	20112	20224	30236	20035	64	1	1	20201	100	99	100	20100	10100	0	0	0	1	1	1	1319	1	16	0	0	20012	20000	20100	20036	20036	20036	20036	20036
20204	20035	150	0	0	12	0	441	19930	25	20100	20100	20112	1297233	1	49	16955	20035	20035	17425	8	17486	20112	20224	30236	20035	64	1	1	20201	100	99	100	20100	10100	0	0	0	1	1	1	1319	0	16	0	0	20012	20000	20100	20036	20036	20036	20036	20036
20204	20035	150	0	0	21	0	61	19930	25	20100	20100	20112	1297233	1	49	16955	20035	20035	17425	7	17485	20112	20224	30236	20035	64	1	1	20201	100	99	100	20100	10100	0	1	0	1	1	1	1319	0	16	0	0	20012	20000	20100	20036	20036	20036	20036	20036

1000 unrolls and 10 iterations

Result (median cycles for code, minus 1 chain cycle): 1.0035

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

retire uop (01)	cycle (02)	03	1e	3f	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
20024	20035	150	0	108	19918	25	20010	20010	20010	1297247	49	16955	20035	20035	17428	3	17504	20010	20020	30020	20035	64	1	1	20021	10	9	10	20010	10010	0	0	1270	2	27	2	2	19995	20000	20010	20036	20036	20036	20036	20036
20024	20035	150	0	82	19918	25	20010	20010	20010	1297247	49	16955	20035	20035	17428	3	17504	20010	20020	30020	20035	64	1	1	20021	10	9	10	20010	10010	0	0	1270	2	27	2	2	19995	20000	20010	20036	20036	20036	20036	20036
20024	20035	150	0	103	19918	25	20010	20010	20010	1297247	49	16955	20035	20035	17428	3	17504	20010	20020	30020	20035	64	1	1	20021	10	9	10	20010	10010	0	0	1270	2	27	2	3	19995	20000	20010	20036	20036	20036	20036	20036
20024	20035	150	0	61	19918	25	20010	20010	20010	1297247	49	16955	20035	20035	17428	3	17504	20010	20020	30020	20035	64	1	1	20021	10	9	10	20010	10010	0	0	1270	2	27	2	2	19995	20000	20010	20036	20036	20036	20036	20036
20024	20035	150	0	145	19918	25	20010	20010	20010	1297247	49	16955	20035	20035	17428	3	17504	20010	20020	30020	20035	64	1	1	20021	10	9	10	20010	10010	0	0	1270	2	27	2	2	19995	20000	20010	20036	20036	20036	20036	20036
20024	20035	150	0	359	19918	25	20010	20010	20010	1297247	49	16955	20035	20035	17428	3	17504	20010	20020	30020	20035	64	1	1	20021	10	9	10	20010	10010	1	0	1270	2	27	2	3	19995	20000	20010	20036	20036	20036	20036	20036
20024	20035	150	0	272	19918	25	20010	20010	20010	1297247	49	16955	20035	20035	17428	3	17504	20010	20020	30020	20035	64	1	1	20021	10	9	10	20010	10010	0	0	1270	2	27	2	2	19995	20000	20010	20036	20036	20036	20036	20036
20024	20035	149	0	61	19918	25	20010	20010	20010	1297247	49	16955	20035	20035	17428	3	17504	20010	20020	30020	20035	64	1	1	20021	10	9	10	20010	10010	0	0	1270	2	27	2	2	20047	20000	20010	20036	20036	20036	20036	20036
20024	20035	150	0	1033	19918	25	20010	20010	20010	1297247	49	16955	20081	20080	17428	3	17504	20010	20020	30020	20035	64	1	1	20021	10	9	10	20010	10010	0	0	1270	2	27	2	2	19995	20000	20010	20036	20036	20036	20036	20036
20024	20035	150	0	61	19918	25	20010	20010	20010	1297247	49	16955	20035	20035	17428	3	17504	20010	20020	30020	20035	64	1	1	20021	10	9	10	20010	10010	0	0	1270	2	27	2	2	19995	20000	20010	20036	20036	20036	20036	20036

Test 5: Latency 4->3

Chain cycles: 1

Code:

  subs x0, x1, x2, sxtx
  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): 1.0035

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

retire uop (01)	cycle (02)	03	1e	3f	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)	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	20035	150	231	61	19930	25	20100	20100	20112	1297233	1	49	16955	20035	20035	17425	7	17486	20112	20224	30236	20035	64	1	1	20201	100	99	100	20100	10100	0	1	1	1	1319	16	20012	20000	20100	20036	20036	20036	20036	20036
20204	20035	150	0	61	19930	25	20100	20100	20112	1297233	1	49	16955	20035	20035	17425	7	17486	20112	20224	30236	20035	64	1	1	20201	100	99	100	20100	10100	0	1	1	1	1320	16	20012	20000	20100	20036	20036	20036	20036	20036
20204	20035	150	0	61	19930	25	20100	20100	20112	1297233	1	49	16955	20035	20035	17425	8	17486	20112	20224	30236	20035	64	1	1	20201	100	99	100	20100	10100	0	1	1	1	1319	16	20012	20000	20100	20036	20036	20036	20036	20036
20204	20035	150	0	61	19930	25	20100	20100	20112	1297233	1	49	16955	20035	20035	17425	8	17485	20112	20224	30236	20035	64	1	1	20201	100	99	100	20100	10100	0	1	1	1	1320	16	20012	20000	20100	20036	20036	20036	20036	20083
20204	20035	150	270	61	19930	25	20100	20100	20112	1297233	0	49	16955	20035	20035	17425	7	17486	20112	20224	30236	20081	64	2	1	20201	100	99	100	20100	10100	0	1	1	1	1320	16	20012	20000	20100	20036	20036	20036	20036	20036
20204	20035	150	0	61	19930	25	20100	20100	20112	1297233	0	49	16955	20035	20035	17425	8	17485	20112	20224	30236	20035	64	1	1	20201	100	99	100	20100	10100	0	1	1	1	1320	16	20012	20000	20100	20036	20036	20036	20036	20036
20204	20035	150	6	61	19930	25	20100	20100	20112	1297233	0	49	16955	20035	20035	17425	8	17486	20112	20224	30236	20035	64	1	1	20201	100	99	100	20100	10100	0	1	1	1	1320	16	20012	20000	20100	20036	20036	20036	20036	20036
20204	20035	150	0	61	19930	25	20100	20100	20112	1297233	0	49	16955	20035	20035	17425	8	17485	20112	20224	30236	20035	64	1	1	20201	100	99	100	20100	10100	0	1	1	1	1320	16	20012	20000	20100	20036	20036	20036	20036	20036
20204	20035	150	0	61	19930	25	20100	20100	20112	1297233	0	49	16955	20035	20035	17425	7	17485	20112	20224	30236	20035	64	1	1	20201	100	99	100	20100	10100	0	1	1	1	1319	16	20012	20000	20100	20036	20036	20036	20036	20036
20204	20035	150	87	61	19930	25	20100	20100	20112	1297233	0	49	16955	20035	20035	17425	8	17486	20112	20224	30236	20035	64	1	1	20201	100	99	100	20100	10100	1	1	1	1	1320	16	20012	20022	20100	20036	20036	20036	20036	20036

1000 unrolls and 10 iterations

Result (median cycles for code, minus 1 chain cycle): 1.0035

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	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)	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
20024	20035	150	0	0	0	0	0	0	361	19918	25	20010	20010	20010	1297247	0	49	16955	20035	20035	17428	3	17504	20010	20020	30020	20035	64	1	1	20021	10	9	10	20010	10010	0	0	0	0	1270	1	27	3	2	19995	20000	20010	20036	20036	20036	20036	20036
20024	20035	150	0	0	0	0	0	0	105	19918	25	20010	20010	20010	1297247	0	49	16955	20035	20035	17428	3	17504	20010	20020	30020	20035	64	1	1	20021	10	9	10	20010	10010	0	0	0	0	1270	2	27	2	1	19995	20000	20010	20036	20036	20036	20036	20036
20024	20035	150	0	0	0	0	0	0	124	19918	25	20010	20010	20010	1297247	0	49	16955	20035	20035	17428	3	17504	20010	20020	30020	20035	64	1	1	20021	10	9	10	20010	10010	0	0	0	0	1270	1	27	1	2	19995	20000	20010	20036	20036	20036	20036	20036
20024	20035	150	0	0	0	0	0	0	61	19918	25	20010	20010	20010	1297247	0	49	16955	20035	20035	17428	3	17504	20010	20020	30020	20035	64	1	1	20021	10	9	10	20010	10010	0	0	0	0	1270	1	27	1	2	19995	20000	20010	20036	20036	20036	20036	20036
20024	20035	150	0	0	0	0	0	0	61	19918	25	20010	20034	20010	1297247	0	49	16955	20035	20035	17428	3	17504	20010	20020	30020	20035	64	1	1	20021	10	9	10	20010	10010	0	0	0	0	1270	1	27	1	2	19995	20000	20010	20036	20036	20036	20036	20036
20024	20035	150	0	0	0	0	0	0	61	19918	25	20010	20010	20010	1297247	0	49	16955	20035	20035	17428	3	17504	20010	20020	30020	20035	64	1	1	20021	10	9	10	20010	10010	0	0	0	0	1270	2	27	2	1	19995	20000	20010	20036	20036	20036	20036	20036
20024	20035	150	0	0	0	0	0	0	61	19918	25	20010	20010	20010	1297247	0	49	16955	20035	20035	17428	3	17504	20010	20020	30020	20035	64	1	1	20021	10	9	10	20010	10010	0	0	0	0	1270	3	27	1	1	19995	20000	20010	20036	20036	20036	20036	20036
20024	20035	150	0	0	0	0	0	0	82	19918	25	20010	20010	20010	1297247	0	49	16955	20035	20035	17428	3	17504	20010	20020	30020	20035	64	1	1	20021	10	9	10	20010	10010	0	0	0	0	1270	2	27	2	1	19995	20000	20010	20036	20036	20036	20036	20036
20024	20035	150	0	0	0	0	0	0	61	19918	25	20010	20010	20010	1297247	0	49	16955	20035	20035	17428	3	17504	20010	20020	30020	20035	64	1	1	20021	10	9	10	20010	10010	0	1	1	0	1270	1	27	2	2	19995	20000	20010	20036	20036	20036	20036	20036
20024	20035	150	0	0	0	0	0	0	600	19918	25	20010	20010	20010	1297247	0	49	16955	20035	20035	17428	3	17504	20010	20020	30020	20035	64	1	1	20021	10	9	10	20010	10010	0	0	0	0	1287	2	27	2	1	19995	20000	20010	20036	20036	20036	20036	20036

Test 6: throughput

Count: 8

Code:

  subs x0, x8, x9, sxtx
  subs x1, x8, x9, sxtx
  subs x2, x8, x9, sxtx
  subs x3, x8, x9, sxtx
  subs x4, x8, x9, sxtx
  subs x5, x8, x9, sxtx
  subs x6, x8, x9, sxtx
  subs x7, x8, x9, sxtx

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): 0.3342

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

retire uop (01)	cycle (02)	03	19	1e	3f	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 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
80204	26761	200	0	90	35	25	80100	80100	80100	400500	1	49	23655	26735	26735	16672	3	16690	80100	80200	160200	26735	39	1	1	80201	100	99	100	80100	100	0	0	0	0	5110	2	19	2	2	26731	80000	80100	26736	26736	26736	26736	26736
80204	26735	200	0	0	35	25	80100	80100	80100	400500	1	49	23655	26735	26735	16672	3	16690	80100	80200	160200	26735	39	1	1	80201	100	99	100	80100	100	0	0	0	0	5110	2	19	2	2	26731	80000	80100	26736	26736	26736	26736	26736
80204	26735	200	0	15	35	25	80100	80100	80100	400500	0	49	23655	26735	26735	16672	3	16690	80100	80200	160200	26735	39	1	1	80201	100	99	100	80100	100	1	0	0	0	5110	2	19	2	2	26731	80000	80100	26736	26736	26736	26736	26736
80204	26735	200	0	6	35	25	80100	80100	80100	400500	1	49	23655	26735	26735	16672	3	16690	80100	80200	160200	26735	39	1	1	80201	100	99	100	80100	100	0	0	0	0	5110	2	19	2	2	26731	80000	80100	26736	26736	26736	26736	26736
80204	26735	200	0	0	35	25	80100	80100	80100	400500	1	49	23655	26735	26735	16672	3	16690	80100	80200	160200	26735	39	1	1	80201	100	99	100	80100	100	0	0	0	0	5110	3	19	2	2	26731	80000	80100	26736	26736	26736	26736	26736
80204	26735	200	3	18	35	25	80100	80100	80100	400500	1	49	23655	26735	26735	16672	3	16690	80100	80200	160200	26735	39	1	1	80201	100	99	100	80100	100	0	0	0	0	5110	2	19	2	2	26731	80000	80100	26736	26736	26736	26736	26736
80204	26735	200	0	0	35	25	80100	80100	80100	400500	1	49	23655	26735	26735	16672	3	16690	80100	80200	160200	26735	39	1	1	80201	100	99	100	80100	100	0	0	0	0	5110	2	19	2	2	26731	80000	80100	26736	26736	26736	26736	26736
80204	26735	200	0	0	35	25	80100	80100	80100	400500	0	49	23655	26735	26735	16672	3	16690	80100	80200	160200	26735	39	1	1	80201	100	99	100	80100	100	0	0	0	0	5110	2	19	2	2	26731	80000	80100	26736	26736	26736	26736	26736
80204	26735	200	0	0	35	25	80100	80100	80100	400500	1	49	23655	26735	26735	16672	3	16690	80100	80200	160200	26735	39	1	1	80201	100	99	100	80100	100	0	0	51	0	5110	2	19	2	2	26731	80000	80100	26736	26736	26736	26736	26736
80204	26735	200	0	6	35	25	80100	80100	80100	400500	1	49	23655	26735	26735	16672	3	16690	80100	80200	160200	26735	39	1	1	80201	100	99	100	80100	100	0	0	0	0	5110	2	19	2	2	26731	80000	80100	26736	26736	26736	26736	26736

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.3338

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

retire uop (01)	cycle (02)	03	mmu table walk instruction (07)	09	l2 tlb miss instruction (0a)	1e	3a	3f	51	schedule uop (52)	schedule int uop (53)	dispatch int uop (56)	int uops in schedulers (59)	5f	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 miss (a1)	ld unit uop (a6)	st unit uop (a7)	l1d cache writeback (a8)	ac	cf	d5	map dispatch bubble (d6)	d9	dd	fetch restart (de)	e0	? int output thing (e9)	? int retires (ef)	f5	f6	f7	f8	fd
80024	26720	200	0	0	0	0	0	79	25	80010	80010	80010	400050	0	0	49	23625	26705	26705	16665	3	16683	80010	80020	160020	26705	39	1	1	80021	10	9	10	80010	10	0	3	1	0	0	5020	6	18	0	2	6	26702	80000	80010	26706	26706	26706	26706	26706
80024	26705	200	0	0	0	0	0	35	25	80010	80010	80010	400050	0	0	49	23625	26705	26705	16665	3	16683	80010	80020	160020	26705	39	1	1	80021	10	9	10	80010	10	0	0	0	0	0	5020	2	18	0	2	6	26702	80000	80010	26706	26706	26706	26706	26706
80024	26705	200	0	0	0	0	0	35	25	80010	80010	80010	400050	0	0	49	23625	26705	26705	16665	3	16683	80010	80020	160020	26705	39	1	1	80021	10	9	10	80010	10	0	0	0	0	0	5020	6	18	0	2	6	26702	80000	80010	26706	26706	26706	26706	26706
80024	26705	200	0	0	0	0	0	142	25	80010	80010	80010	400050	1	0	49	23625	26705	26705	16665	3	16683	80010	80020	160020	26705	39	1	1	80021	10	9	10	80010	10	0	0	0	0	0	5020	2	18	0	2	2	26702	80000	80010	26706	26706	26706	26706	26706
80024	26705	200	0	0	0	0	0	35	25	80010	80010	80010	400050	0	1	49	23625	26705	26705	16665	3	16683	80010	80020	160020	26705	39	1	1	80021	10	9	10	80010	10	0	0	0	0	0	5020	2	18	0	6	2	26702	80000	80010	26706	26706	26706	26706	26706
80024	26705	200	0	0	0	0	0	670	25	80010	80010	80010	400050	0	0	49	23625	26705	26705	16665	3	16683	80010	80020	160020	26705	39	1	1	80021	10	9	10	80010	10	0	0	0	2	0	5020	2	18	0	3	6	26702	80000	80010	26706	26706	26706	26706	26706
80024	26705	200	0	0	0	0	0	35	25	80010	80010	80010	400050	0	0	49	23625	26705	26705	16665	3	16683	80010	80020	160020	26705	39	1	1	80021	10	9	10	80010	10	0	0	0	0	0	5020	2	18	0	2	6	26702	80000	80010	26706	26706	26706	26706	26706
80024	26705	200	0	0	0	0	0	182	25	80010	80010	80010	400050	0	0	49	23625	26705	26705	16665	3	16683	80010	80020	160020	26705	39	1	1	80021	10	9	10	80010	10	0	0	0	0	0	5020	2	18	0	2	6	26702	80000	80010	26706	26706	26706	26706	26706
80024	26705	200	0	0	0	0	0	508	25	80010	80010	80010	400050	0	1	49	23625	26705	26705	16665	3	16683	80010	80020	160020	26705	39	1	1	80021	10	9	10	80010	10	0	0	0	0	0	5020	2	18	0	2	2	26702	80000	80010	26706	26706	26706	26706	26706
80024	26705	200	0	0	0	0	0	35	25	80010	80010	80010	400050	0	0	49	23625	26705	26705	16665	3	16683	80010	80020	160020	26705	39	1	1	80021	10	9	10	80010	10	0	0	0	0	0	5020	2	18	0	3	6	26702	80000	80010	26706	26706	26706	26706	26706

SUBS (sxtx, 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