Firestorm: SBC (32-bit) measurements

Code:

  sbc w0, w0, w1

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)	mmu table walk data (08)	1e	3f	4d	51	schedule uop (52)	schedule int uop (53)	dispatch int uop (56)	int uops in schedulers (59)	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)	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	1035	7	0	0	0	61	917	25	1000	1000	1000	62250	1035	1035	805	3	882	1000	1000	3000	1035	104	1	1	1001	1000	0	0	73	3	27	3	3	990	1000	1000	1036	1036	1036	1036	1036
1004	1035	7	0	0	0	61	917	25	1000	1000	1000	62250	1035	1035	805	3	882	1000	1000	3000	1035	104	1	1	1001	1000	4	0	73	3	27	3	3	990	1000	1000	1036	1036	1036	1036	1036
1004	1035	7	0	0	0	61	917	25	1000	1000	1000	62250	1035	1035	805	3	882	1000	1000	3000	1035	104	1	1	1001	1000	0	0	73	3	27	3	3	990	1000	1000	1036	1036	1036	1036	1036
1004	1035	7	0	0	0	61	917	25	1000	1000	1000	62250	1035	1035	805	3	882	1000	1000	3000	1035	104	1	1	1001	1000	0	0	73	3	27	3	3	990	1000	1000	1036	1036	1036	1036	1036
1004	1035	7	0	0	0	61	917	25	1000	1000	1000	62250	1035	1035	805	3	882	1000	1000	3000	1035	104	1	1	1001	1000	0	0	73	3	27	3	3	990	1000	1000	1036	1036	1036	1036	1036
1004	1035	7	0	0	0	61	917	25	1000	1000	1000	62250	1035	1035	805	3	882	1000	1000	3000	1035	104	1	1	1001	1000	1	0	73	3	27	3	3	990	1000	1000	1036	1036	1036	1036	1036
1004	1035	8	0	0	0	61	917	25	1000	1000	1000	62250	1035	1035	805	3	882	1000	1000	3000	1035	104	1	1	1001	1000	3	0	73	3	27	3	3	990	1000	1000	1036	1036	1036	1036	1036
1004	1035	8	0	0	0	61	917	25	1000	1000	1000	62250	1035	1035	805	3	882	1000	1000	3000	1035	104	1	1	1001	1000	2	0	73	3	27	3	3	990	1000	1000	1036	1036	1036	1036	1036
1004	1035	7	0	0	0	61	917	25	1000	1000	1000	62250	1035	1035	805	3	882	1000	1000	3000	1035	104	1	1	1001	1000	4	0	73	3	27	3	3	990	1000	1000	1036	1036	1036	1036	1036
1004	1035	7	0	0	0	61	917	25	1000	1000	1000	62250	1035	1035	805	3	882	1000	1000	3000	1035	104	1	1	1001	1000	4	0	73	3	27	3	3	990	1000	1000	1036	1036	1036	1036	1036

Test 2: Latency 1->2

Code:

  sbc w0, w0, w1

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 instruction (07)	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	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
10204	10035	75	0	0	0	12	192	0	394	9920	25	10100	10100	10125	647152	1	49	6955	10035	10035	8656	3	8732	10100	10200	30200	10035	102	1	1	10201	100	99	100	10100	100	0	0	0	710	1	27	1	1	9992	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	0	0	18	0	0	61	9920	25	10100	10100	10100	647152	1	49	6955	10035	10035	8656	3	8732	10100	10200	30200	10035	109	1	1	10201	100	99	100	10100	100	0	0	0	710	1	27	1	1	9992	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	1	0	0	0	0	0	61	9920	25	10100	10100	10100	647152	1	49	6955	10035	10035	8656	3	8732	10100	10200	30200	10035	109	1	1	10201	100	99	100	10100	100	0	1	0	710	1	27	1	1	9992	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	0	0	15	0	0	103	9920	25	10100	10100	10100	647152	1	49	6955	10035	10035	8657	3	8732	10125	10200	30200	10035	102	1	1	10201	100	99	100	10100	100	0	0	0	712	1	27	1	1	9992	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	0	0	15	0	0	103	9920	25	10100	10100	10100	647152	1	49	6955	10035	10035	8656	3	8732	10280	10200	30200	10035	102	1	1	10201	100	99	100	10100	100	0	0	0	710	1	27	1	1	9992	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	0	0	0	0	0	61	9920	25	10100	10100	10100	647152	0	49	6955	10035	10035	8656	3	8732	10100	10200	30200	10035	102	1	1	10201	100	99	100	10100	100	2	0	3	710	1	27	1	1	9992	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	0	0	12	0	0	61	9920	25	10100	10100	10100	647152	1	49	6955	10035	10035	8656	3	8732	10100	10200	30200	10035	102	1	1	10201	100	99	100	10100	100	0	0	0	714	1	40	1	1	10062	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	0	0	72	0	0	61	9920	25	10100	10100	10100	647152	0	49	6955	10035	10035	8656	3	8732	10100	10200	30200	10035	102	1	1	10201	100	99	100	10100	100	0	0	0	710	1	27	1	1	9993	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	0	0	0	0	0	61	9920	25	10100	10100	10100	647152	1	49	6955	10035	10035	8656	3	8732	10100	10200	30200	10035	102	1	1	10201	100	99	100	10100	100	0	0	0	710	1	27	1	1	9992	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	0	0	0	0	0	61	9920	25	10100	10100	10100	647152	0	49	6955	10035	10035	8656	3	8732	10100	10200	30200	10035	102	1	1	10201	100	99	100	10100	100	0	0	0	710	1	27	1	1	9992	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	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 cache writeback (a8)	a9	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
10024	10035	76	0	0	84	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	30020	10035	104	1	1	10021	10	9	10	10010	10	0	0	0	640	2	27	2	2	9993	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	0	61	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	30020	10035	104	1	1	10021	10	9	10	10010	10	0	0	0	640	2	27	2	2	9993	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	0	61	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	30020	10035	104	1	1	10021	10	9	10	10010	10	0	0	0	640	2	27	2	2	9993	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	0	61	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	30020	10035	104	1	1	10021	10	9	10	10010	10	0	0	0	640	3	27	2	2	9993	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	0	61	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	30020	10035	104	1	1	10021	10	9	10	10010	10	0	0	0	640	2	27	2	2	9993	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	0	126	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	30020	10035	104	1	1	10021	10	9	10	10010	10	0	0	0	640	3	27	2	2	9993	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	0	147	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	30020	10035	104	1	1	10021	10	9	10	10010	10	16	0	0	640	3	27	2	2	9993	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	0	103	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	30020	10035	104	1	1	10021	10	9	10	10010	10	1	0	0	640	3	27	2	2	9993	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	0	146	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	30020	10035	104	1	1	10021	10	9	10	10010	10	0	0	0	640	2	27	2	2	9993	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	0	61	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	30020	10035	104	1	1	10021	10	9	10	10010	10	0	0	0	640	2	27	2	2	9993	10000	10010	10036	10036	10036	10036	10036

Test 3: Latency 1->3

Code:

  sbc w0, w1, w0

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	61	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)	cf	d0	d2	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	63	61	9920	25	10100	10100	10100	647152	0	10	49	6955	10035	10035	8656	6	8758	10100	10200	30200	10035	102	1	1	10201	100	99	100	10100	100	0	710	10	0	1	27	1	1	9992	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	61	9920	25	10142	10100	10100	647152	1	0	49	6955	10035	10035	8656	3	8732	10100	10200	30200	10035	102	1	1	10201	100	99	100	10100	100	0	710	10	10	1	27	1	1	9992	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	12	61	9920	25	10100	10100	10100	647152	1	0	49	6955	10035	10035	8656	3	8732	10100	10200	30200	10035	102	1	1	10201	100	99	100	10100	100	0	710	0	10	1	27	1	1	9992	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	61	9920	25	10100	10100	10100	647152	1	10	49	6955	10035	10035	8656	3	8732	10100	10200	30200	10035	102	1	1	10201	100	99	100	10100	100	0	710	10	10	1	27	1	1	9992	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	61	9920	25	10100	10100	10100	647152	1	10	49	6955	10035	10035	8656	3	8732	10100	10200	30200	10035	102	1	1	10201	100	99	100	10100	100	0	710	10	10	1	27	1	1	9992	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	61	9920	25	10100	10100	10100	647152	1	10	49	6955	10035	10168	8656	3	8732	10100	10200	30200	10035	102	1	1	10201	100	99	100	10100	100	0	710	10	10	1	27	1	1	9992	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	9	61	9920	25	10100	10100	10100	647152	1	10	49	6955	10035	10035	8656	3	8732	10100	10200	30200	10035	102	1	1	10201	100	99	100	10100	100	0	710	10	10	1	27	1	1	9992	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	82	9920	25	10100	10100	10100	647152	1	10	49	6955	10035	10035	8656	3	8732	10100	10200	30200	10035	102	1	1	10201	100	99	100	10100	100	0	710	10	0	1	27	1	1	9992	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	61	9920	25	10100	10100	10100	647152	1	10	49	6955	10035	10035	8656	3	8732	10100	10200	30200	10035	102	1	1	10201	100	99	100	10100	100	0	710	10	5	1	27	1	1	9992	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	61	9920	25	10100	10100	10100	647152	1	10	49	6955	10035	10035	8656	3	8732	10100	10200	30200	10035	102	1	1	10201	100	99	100	10100	100	0	710	10	5	1	27	1	1	9992	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 tlb access (a0)	a9	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
10024	10035	75	0	61	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	30020	10035	104	1	1	10021	10	9	10	10010	10	0	0	0	640	4	27	3	4	9993	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	6	61	9918	25	10010	10010	10010	647246	0	49	6955	10035	10035	8678	3	8754	10010	10020	30020	10035	104	1	1	10021	10	9	10	10010	10	0	0	0	640	4	27	4	3	9993	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	82	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	30020	10035	104	1	1	10021	10	9	10	10010	10	0	0	0	640	3	27	3	4	9993	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	165	61	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	30020	10035	104	1	1	10021	10	9	10	10010	10	0	0	0	640	3	27	4	4	9993	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	30020	10035	104	1	1	10021	10	9	10	10010	10	0	0	0	640	4	27	3	4	9993	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	30020	10035	104	1	1	10021	10	9	10	10010	10	0	0	0	640	4	27	4	4	9993	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	30020	10035	104	1	1	10021	10	9	10	10010	10	0	0	0	640	3	27	3	4	9993	10000	10010	10036	10036	10036	10036	10036
10024	10035	76	18	61	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	30020	10035	104	1	1	10021	10	9	10	10010	10	0	0	0	640	4	27	4	3	9993	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	15	61	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	30020	10035	104	1	1	10021	10	9	10	10010	10	0	0	0	640	4	27	4	4	9993	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	3	61	9918	25	10010	10010	10010	647246	1	49	6955	10035	10035	8678	3	8754	10010	10020	30020	10035	104	1	1	10021	10	9	10	10010	10	0	0	0	640	4	27	3	4	9993	10000	10010	10036	10036	10036	10036	10036

Test 4: Latency 1->4

Chain cycles: 1

Code:

  sbc w0, w1, w2
  tst x0, 1

Initialization

  mov x0, 1
  mov x1, 2
  mov x2, 3

(non-fused SUB/CBNZ 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	19	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 int alu (97)	l1d tlb access (a0)	ld unit uop (a6)	st unit uop (a7)	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
20204	20035	150	0	39	82	19926	45	20200	20200	20200	1297650	0	49	16955	20035	20035	17406	3	17481	20200	20200	40200	20035	104	1	1	20201	100	99	20100	0	0	0	0	0	0	1310	1	28	1	1	19992	20100	10100	20036	20036	20036	20036	20036
20204	20035	150	0	6	61	19926	25	20200	20200	20200	1297650	1	49	16955	20035	20035	17406	3	17481	20200	20200	40200	20035	104	1	1	20201	100	99	20100	0	0	0	0	0	0	1310	1	28	1	1	19992	20100	10100	20036	20036	20036	20036	20036
20204	20035	150	0	12	61	19926	25	20200	20200	20200	1297650	1	49	16955	20035	20035	17406	3	17481	20200	20200	40200	20035	104	1	1	20201	100	99	20100	0	0	0	0	0	0	1310	1	28	1	1	19992	20100	10100	20036	20036	20036	20036	20036
20204	20035	150	0	57	61	19926	25	20200	20200	20200	1297650	1	49	16955	20035	20035	17406	3	17481	20200	20200	40200	20035	104	1	1	20201	100	99	20100	0	0	0	0	0	0	1310	1	28	1	1	19992	20100	10100	20036	20036	20036	20036	20036
20204	20035	150	0	0	726	19926	25	20200	20200	20200	1297650	1	49	16955	20035	20035	17406	3	17481	20297	20200	40200	20035	104	1	1	20201	100	99	20100	0	0	0	0	0	0	1310	1	28	1	1	19992	20100	10100	20036	20036	20036	20036	20036
20204	20035	150	0	0	61	19926	25	20200	20200	20200	1297650	1	49	16955	20035	20035	17406	3	17481	20200	20200	40200	20035	104	1	1	20201	100	99	20100	0	0	0	0	0	0	1310	1	28	1	1	19992	20100	10100	20036	20036	20036	20036	20036
20204	20035	150	0	3	61	19926	25	20200	20200	20200	1297650	1	49	16955	20035	20035	17406	3	17481	20200	20200	40200	20035	104	1	1	20201	100	99	20100	0	0	0	0	0	0	1310	1	28	1	1	19992	20100	10100	20036	20036	20036	20036	20036
20204	20035	150	0	0	61	19926	25	20200	20200	20200	1297650	1	49	16955	20035	20035	17406	3	17481	20200	20200	40200	20035	104	1	1	20201	100	99	20100	0	0	0	0	0	0	1310	1	28	1	1	19992	20100	10100	20036	20036	20036	20036	20036
20204	20035	150	0	0	61	19926	25	20200	20200	20200	1297650	1	49	16955	20035	20035	17406	3	17481	20200	20200	40200	20035	104	1	1	20201	100	99	20100	0	0	0	0	0	0	1310	1	28	1	1	19992	20100	10100	20036	20036	20036	20036	20036
20204	20035	150	0	0	61	19926	25	20200	20200	20200	1297650	1	49	16955	20035	20035	17406	3	17481	20200	20200	40200	20035	104	1	1	20201	100	99	20100	0	0	0	0	0	0	1310	1	28	1	1	19992	20100	10100	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)	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 int alu (97)	l1d tlb access (a0)	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	61	19918	25	20020	20020	20020	1297297	0	49	16955	20035	20035	17428	3	17504	20020	20020	40020	20035	104	1	1	20021	10	9	20010	0	0	0	1270	1	27	1	1	19995	20010	10010	20036	20036	20036	20036	20036
20024	20035	150	0	63	61	19918	25	20020	20020	20020	1297297	0	49	16955	20035	20035	17428	3	17504	20020	20020	40020	20035	104	1	1	20021	10	9	20010	0	0	0	1270	1	27	1	1	19995	20010	10010	20036	20036	20036	20036	20036
20024	20035	150	0	48	61	19918	25	20020	20020	20020	1297297	0	98	16955	20035	20035	17428	3	17504	20020	20020	40020	20035	104	1	1	20021	10	9	20010	0	0	0	1270	1	27	1	1	19995	20010	10010	20036	20036	20036	20036	20036
20024	20035	150	0	93	61	19918	25	20020	20020	20020	1297297	1	49	16955	20035	20035	17428	3	17504	20020	20020	40020	20035	104	1	1	20021	10	9	20010	0	0	0	1270	1	27	1	1	19995	20010	10010	20036	20036	20036	20036	20036
20024	20035	150	0	81	61	19918	25	20020	20020	20020	1297297	1	49	16955	20035	20035	17428	3	17504	20020	20020	40020	20035	104	1	1	20021	10	9	20010	0	0	957	1270	1	27	1	1	19995	20010	10010	20036	20036	20036	20036	20036
20024	20035	150	0	54	61	19918	25	20020	20020	20020	1297297	0	49	16955	20035	20035	17428	3	17504	20020	20020	40020	20035	104	1	1	20021	10	9	20010	0	0	0	1270	2	27	1	1	19995	20010	10010	20036	20036	20036	20036	20036
20024	20035	150	0	81	61	19918	25	20020	20020	20020	1297297	0	49	16955	20035	20035	17428	3	17504	20020	20020	40020	20035	104	1	1	20021	10	9	20010	0	0	0	1270	1	27	1	1	19995	20010	10010	20036	20036	20036	20067	20036
20024	20035	150	0	99	61	19918	25	20020	20020	20020	1297297	0	49	16955	20035	20035	17428	3	17504	20020	20020	40020	20035	104	1	1	20021	10	9	20010	0	0	0	1270	1	27	1	1	19995	20010	10010	20036	20036	20036	20036	20036
20024	20035	150	0	0	61	19918	25	20020	20020	20020	1297297	0	49	16955	20035	20035	17428	3	17504	20020	20020	40020	20035	104	1	1	20021	10	9	20010	0	0	0	1270	1	27	1	1	19995	20010	10010	20036	20036	20036	20036	20036
20024	20035	150	0	18	61	19918	25	20020	20020	20020	1297297	0	49	16955	20035	20035	17428	3	17504	20020	20020	40020	20035	104	1	1	20021	10	9	20010	0	0	0	1270	1	27	1	1	19995	20010	10010	20036	20036	20036	20036	20036

Test 5: throughput

Count: 8

Code:

  sbc w0, w8, w9
  sbc w1, w8, w9
  sbc w2, w8, w9
  sbc w3, w8, w9
  sbc w4, w8, w9
  sbc w5, w8, w9
  sbc w6, w8, w9
  sbc w7, w8, w9

Initialization

  mov x8, 9
  mov x9, 10

(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	mmu table walk instruction (07)	mmu table walk data (08)	l2 tlb miss instruction (0a)	l2 tlb miss data (0b)	18	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 cache writeback (a8)	ac	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	26740	200	0	0	0	0	0	0	36	25	80100	80100	80100	479799	0	49	23656	26736	26736	16672	3	16691	80100	80200	240200	26736	66	1	1	80201	100	99	100	80100	100	0	0	0	5110	4	19	2	2	26732	80000	80100	26737	26737	26737	26737	26737
80204	26736	201	0	0	0	0	0	0	36	25	80100	80100	80100	479799	0	49	23656	26736	26736	16672	3	16691	80100	80200	240200	26736	66	1	1	80201	100	99	100	80100	100	0	0	0	5110	2	19	2	2	26732	80000	80100	26737	26737	26737	26737	26737
80204	26736	200	0	0	0	0	0	0	36	25	80187	80100	80100	479799	1	49	23656	26736	26736	16672	3	16691	80100	80200	240200	26736	66	1	1	80201	100	99	100	80100	100	0	228	0	5110	2	19	2	3	26732	80000	80100	26737	26737	26737	26737	26737
80204	26736	201	0	0	0	0	0	0	36	25	80100	80100	80100	479799	1	49	23656	26736	26736	16672	3	16691	80100	80200	240200	26736	66	1	1	80201	100	99	100	80100	100	0	0	0	5110	2	37	2	2	26732	80000	80100	26737	26737	26737	26737	26737
80204	26736	200	0	0	0	0	0	0	36	25	80100	80100	80100	479799	1	49	23656	26736	26736	16672	3	16691	80100	80200	240200	26736	66	1	1	80201	100	99	100	80100	100	0	0	0	5110	2	19	2	2	26732	80000	80100	26737	26737	26737	26737	26737
80204	26736	200	0	0	0	0	0	0	36	25	80100	80100	80100	479799	0	49	23656	26736	26736	16672	3	16691	80100	80200	240200	26736	66	1	1	80201	100	99	100	80100	100	0	0	0	5110	2	19	2	2	26732	80000	80100	26737	26737	26737	26737	26737
80204	26736	200	0	0	0	0	0	0	36	25	80100	80100	80100	479799	0	49	23656	26736	26736	16672	3	16691	80100	80200	240200	26736	66	1	1	80201	100	99	100	80100	100	0	0	0	5110	2	19	2	2	26732	80000	80100	26737	26737	26737	26737	26737
80204	26736	200	0	0	0	0	0	0	36	25	80100	80100	80100	479799	1	49	23656	26736	26736	16672	3	16691	80100	80200	240200	26736	66	1	1	80201	100	99	100	80100	100	0	0	0	5110	2	19	2	2	26732	80000	80100	26737	26737	26737	26737	26737
80204	26736	200	0	0	0	0	0	0	701	25	80100	80100	80100	479799	0	49	23656	26736	26736	16672	3	16691	80100	80200	240200	26736	66	1	1	80201	100	99	100	80100	100	0	0	0	5110	2	19	2	2	26732	80000	80100	26737	26737	26737	26737	26737
80204	26736	200	0	0	0	0	0	0	36	25	80100	80100	80100	479799	0	49	23656	26736	26736	16672	3	16691	80100	80200	240200	26736	66	1	1	80201	100	99	100	80100	100	4	0	0	5110	2	19	2	2	26732	80000	80100	26737	26737	26737	26737	26737

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 data (08)	l2 tlb miss data (0b)	18	19	1e	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 access (a0)	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
80024	26723	200	0	0	0	0	12	36	25	80010	80010	80010	472059	0	1	49	23626	26706	26706	16665	3	16684	80010	80020	240020	26706	66	1	1	80021	10	9	10	80010	10	0	0	0	5020	3	18	1	1	26702	80000	80010	26755	26707	26707	26707	26707
80024	26706	200	0	0	0	0	6	36	25	80010	80010	80010	472059	0	1	49	23626	26706	26706	16665	3	16684	80010	80315	240020	26706	66	1	1	80021	10	9	10	80010	10	0	0	0	5020	1	18	1	1	26702	80000	80010	26707	26707	26894	26707	26707
80024	26706	200	0	0	0	0	6	36	25	80010	80010	80010	472059	0	1	49	23626	26706	26706	16665	3	16684	80010	80020	240020	26706	66	1	1	80021	10	9	10	80010	10	0	0	0	5020	1	18	1	1	26702	80000	80010	26707	26707	26707	26707	26707
80024	26706	200	0	1	0	0	0	36	25	80010	80010	80010	502692	0	1	49	23626	26706	26706	16665	3	16684	80010	80020	240020	26706	66	1	1	80021	10	9	10	80010	10	0	0	0	5020	1	18	1	1	26702	80000	80010	26707	26707	26707	26707	26707
80024	26706	200	0	0	0	0	6	36	25	80010	80010	80010	472059	0	1	49	23626	26706	26706	16665	3	16684	80010	80020	240020	26706	66	1	1	80021	10	9	10	80010	10	0	0	0	5020	1	18	1	1	26702	80000	80010	26707	26707	26707	26707	26707
80024	26706	200	0	0	0	0	0	36	25	80010	80010	80010	472059	0	1	49	23626	26799	26706	16665	3	16684	80010	80020	240020	26706	66	1	1	80021	10	9	10	80010	10	0	0	0	5020	1	18	1	1	26702	80000	80010	26707	26707	26707	26707	26707
80024	26706	200	0	0	0	0	3	36	25	80010	80010	80010	464711	0	1	49	23626	26706	26706	16665	3	16684	80010	80020	240020	26706	66	1	1	80021	10	9	10	80010	10	0	0	0	5066	1	18	1	1	26702	80000	80010	26707	26707	26707	26707	26707
80024	26706	200	0	0	0	0	0	36	25	80010	80010	80010	472059	0	1	49	23626	26706	26706	16665	3	16684	80010	80020	240020	26706	66	1	1	80021	10	9	10	80010	10	0	0	0	5037	1	18	1	1	26702	80000	80010	26707	26707	26707	26707	26707
80024	26706	200	0	0	0	0	18	57	25	80010	80010	80010	472059	0	1	49	23626	26706	26706	16665	3	16684	80010	80020	240020	26706	66	1	1	80021	10	9	10	80010	10	0	0	0	5020	2	18	2	1	26702	80000	80010	26707	26707	26707	26707	26707
80024	26706	200	0	0	0	0	0	36	25	80010	80010	80010	472059	0	1	49	23626	26706	26706	16665	3	16684	80010	80020	240020	26706	66	1	1	80021	10	9	10	80010	10	0	0	0	5020	1	18	1	1	26702	80000	80010	26707	26707	26707	26707	26707

SBC (32-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 1->4

100 unrolls and 100 iterations

1000 unrolls and 10 iterations

Test 5: throughput

100 unrolls and 100 iterations

1000 unrolls and 10 iterations