Firestorm: FCVTNS (scalar, H to W) measurements

Code:

  fcvtns w0, h0

Initialization

  mov x0, 1
  mov x1, 2

(no loop instructions)

1000 unrolls and 1 iteration

Retires: 2.000

Issues: 3.000

Integer unit issues: 1.000

Load/store unit issues: 0.000

SIMD/FP unit issues: 2.000

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

retire uop (01)	cycle (02)	03	mmu table walk instruction (07)	1e	3f	51	schedule uop (52)	schedule int uop (53)	schedule simd uop (54)	dispatch simd uop (57)	ldst uops in schedulers (5b)	69	6d	6e	map stall dispatch (70)	map rewind (75)	map stall (76)	dispatch uop (78)	map simd uop (7e)	map simd uop inputs (81)	82	83	flush restart other nonspec (84)	85	inst all (8c)	inst int alu (97)	ac	cf	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? int output thing (e9)	? simd retires (ee)	? int retires (ef)	f5	f6	f7	f8	fd
2004	541	4	1	0	43	25	3000	1000	2000	2000	18000	522	541	541	248	3	274	2000	2000	2000	541	541	1	1	1001	1000	0	75	1	16	1	1	538	1000	1000	1000	542	542	542	542	542
2004	541	4	0	3	57	25	3000	1000	2000	2000	18000	522	541	541	248	3	274	2000	2000	2000	541	541	1	1	1001	1000	0	73	1	16	2	2	538	1000	1000	1000	542	542	542	542	542
2004	541	4	0	0	43	25	3000	1000	2000	2000	18000	522	541	541	248	3	274	2000	2000	2000	541	541	1	1	1001	1000	0	73	1	16	1	1	538	1000	1000	1000	542	542	542	542	542
2004	541	5	0	0	43	25	3000	1000	2000	2000	18000	522	541	541	248	3	274	2000	2000	2000	541	541	1	1	1001	1000	0	73	1	16	1	1	538	1000	1000	1000	542	542	542	542	542
2004	541	4	0	0	43	25	3000	1000	2000	2000	18000	522	541	541	248	3	274	2000	2000	2000	541	541	1	1	1001	1000	0	75	2	16	2	2	538	1000	1000	1000	542	542	542	542	542
2004	541	4	0	0	43	25	3000	1000	2000	2000	18000	522	541	541	248	3	274	2000	2000	2000	541	541	1	1	1001	1000	0	75	2	16	1	1	538	1000	1000	1000	542	542	542	542	542
2004	541	4	0	0	43	25	3000	1000	2000	2000	18000	522	541	541	248	3	274	2000	2000	2000	541	541	1	1	1001	1000	0	73	1	16	1	1	538	1000	1000	1000	542	542	542	542	542
2004	541	5	0	12	43	25	3000	1000	2000	2000	18000	522	541	541	248	3	274	2000	2000	2000	541	541	1	1	1001	1000	0	73	1	16	1	1	538	1000	1000	1000	542	542	542	542	542
2004	541	4	0	0	43	25	3000	1000	2000	2000	18000	522	541	541	248	3	274	2000	2000	2000	541	541	1	1	1001	1000	0	73	2	16	2	2	538	1000	1000	1000	542	542	542	542	542
2004	541	4	1	0	43	25	3000	1000	2000	2000	18000	522	541	541	248	3	274	2000	2000	2000	541	541	1	1	1001	1000	0	75	1	16	1	1	538	1000	1000	1000	542	542	542	542	542

Test 2: Latency 1->2 roundtrip

Code:

  fcvtns w0, h0
  fmov d0, x0

Initialization

  mov x0, 1
  mov x1, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 13.0038

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

retire uop (01)	cycle (02)	03	l2 tlb miss data (0b)	1e	3f	4f	51	schedule uop (52)	schedule int uop (53)	schedule simd uop (54)	schedule ldst uop (55)	dispatch int uop (56)	dispatch simd uop (57)	dispatch ldst uop (58)	int uops in schedulers (59)	simd uops in schedulers (5a)	ldst uops in schedulers (5b)	60	69	6d	6e	map stall dispatch (70)	map rewind (75)	map stall (76)	dispatch uop (78)	map int uop (7c)	map ldst uop (7d)	map simd uop (7e)	map int uop inputs (7f)	map ldst uop inputs (80)	map simd uop inputs (81)	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)	inst simd alu (9a)	9f	l1d tlb access (a0)	l1d tlb miss (a1)	ld unit uop (a6)	l1d cache writeback (a8)	ac	cf	d0	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? int output thing (e9)	? ldst retires (ed)	? simd retires (ee)	? int retires (ef)	f5	f6	f7	f8	fd
30204	130038	974	0	0	130023	119417	25	40100	10100	20000	10000	100	20000	10000	500	6214979	14801034	1	130013	130038	130038	125476	3	126246	30100	200	10000	20000	200	10000	20000	130038	130038	1	1	20201	100	99	100	10100	10000	100	0	0	10000	0	0	1310	1	4	16	3	2	129525	10000	10000	10000	10100	130040	130039	130039	130039	130039
30204	130038	974	0	0	130023	119417	25	40100	10100	20000	10000	100	20000	10000	500	6214979	14801034	1	130013	130038	130038	125476	3	126246	30100	200	10000	20000	200	10000	20000	130038	130038	1	1	20201	100	99	100	10100	10000	100	0	0	10011	0	0	1310	1	3	16	3	2	129525	10000	10000	10000	10100	130040	130039	130039	130039	130039
30204	130038	1009	0	0	130023	119417	25	40100	10100	20000	10000	100	20000	10000	500	6214979	14801034	1	130013	130038	130038	125476	3	126246	30100	200	10000	20000	200	10000	20000	130038	130038	1	1	20201	100	99	100	10100	10000	100	0	0	10002	1	4383	1310	1	3	16	3	3	129525	10000	10000	10000	10100	130046	130039	130039	130039	130039
30204	130038	974	0	0	130023	119417	25	40100	10100	20000	10000	100	20000	10000	500	6214979	14801034	1	130013	130038	130038	125476	3	126248	30100	200	10000	20000	200	10000	20000	130038	130038	1	1	20201	100	99	100	10100	10000	100	0	0	10000	3	0	1310	1	3	16	3	2	129581	10000	10000	10000	10100	130039	130039	130039	130039	130039
30204	130038	974	0	0	130023	119417	25	40100	10100	20000	10000	100	20000	10000	500	6214979	14801034	1	130013	130038	130038	125476	3	126246	30100	200	10000	20000	200	10000	20000	130038	130038	1	1	20201	100	99	100	10100	10000	100	0	0	10000	0	0	1310	1	2	16	3	2	129525	10000	10000	10000	10100	130039	130039	130077	130087	130039
30204	130038	974	0	0	130023	119417	25	40100	10100	20000	10000	100	20000	10000	500	6214979	14801034	1	130013	130038	130038	125476	3	126246	30100	200	10000	20000	200	10000	20000	130038	130038	1	1	20201	100	99	100	10100	10000	100	0	0	10000	0	0	1310	1	3	16	3	3	129525	10000	10000	10000	10100	130039	130039	130039	130039	130039
30204	130038	974	0	0	130023	119417	25	40100	10100	20000	10000	100	20000	10050	500	6214979	14801034	1	130013	130038	130038	125476	3	126246	30100	200	10000	20000	200	10000	20000	130038	130038	1	1	20201	100	99	100	10100	10000	100	2	2	10000	0	0	1310	1	3	16	3	3	129525	10000	10000	10000	10100	130039	130039	130039	130039	130039
30204	130038	974	0	0	130023	119417	38	40100	10100	20000	10000	100	20000	10000	500	6214979	14801034	1	130013	130038	130038	125476	3	126246	30100	200	10000	20000	200	10000	20000	130038	130038	1	1	20201	100	99	100	10100	10000	100	0	0	10000	0	0	1310	1	3	16	3	3	129525	10000	10000	10000	10100	130041	130039	130039	130039	130039
30204	130076	974	0	0	130023	119417	25	40100	10100	20000	10000	100	20000	10000	500	6214979	14801034	1	130013	130038	130038	125476	3	126246	30100	200	10000	20000	200	10000	20000	130038	130038	1	1	20201	100	99	100	10100	10000	100	0	0	10000	0	0	1310	1	3	16	3	3	129525	10000	10000	10000	10100	130039	130039	130039	130039	130039
30204	130038	974	0	0	130023	119417	25	40100	10100	20000	10000	100	20000	10000	500	6214979	14801034	1	130013	130038	130038	125476	3	126246	30100	200	10000	20000	200	10000	20132	130079	130039	1	1	20201	100	99	100	10100	10000	100	0	0	10000	0	0	1310	1	3	16	3	3	129525	10000	10000	10000	10100	130039	130039	130039	130039	130039

1000 unrolls and 10 iterations

Result (median cycles for code): 13.0038

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

retire uop (01)	cycle (02)	03	1e	1f	3f	4f	51	schedule uop (52)	schedule int uop (53)	schedule simd uop (54)	schedule ldst uop (55)	dispatch int uop (56)	dispatch simd uop (57)	dispatch ldst uop (58)	int uops in schedulers (59)	simd uops in schedulers (5a)	ldst uops in schedulers (5b)	60	69	6b	6d	6e	map stall dispatch (70)	map rewind (75)	map stall (76)	dispatch uop (78)	map int uop (7c)	map ldst uop (7d)	map simd uop (7e)	map int uop inputs (7f)	map ldst uop inputs (80)	map simd uop inputs (81)	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)	inst simd alu (9a)	9f	l1d tlb miss (a1)	ld unit uop (a6)	l1d cache writeback (a8)	a9	ac	c2	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)	? ldst retires (ed)	? simd retires (ee)	? int retires (ef)	f5	f6	f7	f8	fd
30024	130038	974	0	0	130023	119417	25	40010	10010	20000	10000	10	20000	10000	50	6214979	14800025	0	130013	0	130038	130038	125498	3	126268	30010	20	10000	20000	20	10000	20000	130038	130038	1	1	20021	10	9	10	10010	10000	10	0	10000	0	0	0	0	0	0	0	1270	5	16	2	2	129525	10000	10000	10000	10010	130039	130039	130039	130039	130039
30024	130038	974	0	0	130023	119417	25	40010	10010	20000	10000	12	20000	10000	50	6214979	14800025	1	130013	3	130038	130038	125500	3	126265	30010	20	10000	20000	20	10000	20000	130038	130038	1	1	20021	10	9	10	10010	10000	10	0	10000	0	0	0	0	0	0	0	1270	3	16	1	1	129525	10000	10000	10000	10010	130039	130039	130039	130039	130039
30024	130038	974	0	0	130023	119417	25	40010	10010	20000	10000	10	20000	10000	50	6214979	14800025	1	130013	0	130038	130038	125498	3	126268	30010	20	10000	20000	20	10000	20000	130038	130038	1	1	20021	10	9	10	10010	10000	10	0	10000	1	0	0	0	0	0	0	1270	3	16	2	3	129525	10000	10000	10000	10010	130256	130205	130128	130039	130039
30024	130038	974	0	0	130023	119417	25	40010	10010	20000	10000	10	20000	10000	50	6214979	14800025	0	130013	0	130038	130038	125498	3	126268	30010	20	10000	20000	20	10000	20000	130038	130038	1	1	20021	10	9	10	10010	10000	10	0	10000	0	0	0	0	0	0	0	1270	2	16	3	2	129525	10000	10000	10000	10010	130039	130039	130039	130039	130039
30024	130038	974	0	0	130023	119417	25	40010	10010	20000	10000	10	20000	10000	50	6215445	14800025	0	130013	0	130038	130038	125499	3	126268	30010	20	10000	20000	20	10000	20000	130038	130038	1	1	20021	10	9	10	10010	10000	10	0	10000	0	0	0	0	0	0	0	1270	2	16	2	2	129525	10000	10000	10000	10010	130039	130039	130039	130039	130039
30024	130038	974	0	0	130023	119417	25	40010	10010	20000	10000	10	20000	10000	50	6214979	14800025	0	130013	0	130038	130038	125498	3	126268	30010	20	10000	20000	20	10000	20000	130038	130038	1	1	20021	10	9	10	10010	10000	10	0	10000	0	0	0	0	0	0	0	1270	2	16	1	2	129528	10000	10000	10000	10010	130039	130039	130042	130040	130039
30024	130038	974	0	0	130023	119417	25	40010	10010	20000	10000	10	20000	10000	50	6214979	14800025	1	130013	0	130038	130038	125498	3	126268	30010	20	10000	20000	20	10000	20000	130038	130038	1	1	20021	10	9	10	10010	10000	10	0	10000	0	0	0	0	0	0	0	1270	2	16	2	3	129525	10000	10000	10000	10010	130039	130039	130039	130039	130039
30024	130038	974	0	0	130023	119417	25	40010	10010	20000	10000	10	20000	10000	50	6214979	14800025	1	130013	0	130038	130038	125498	3	126268	30010	20	10000	20000	20	10000	20000	130038	130038	1	1	20021	10	9	10	10010	10000	10	0	10000	81	0	0	0	0	0	0	1270	2	16	2	3	129525	10000	10000	10000	10010	130039	130039	130039	130039	130039
30024	130038	974	0	0	130023	119417	25	40010	10010	20000	10000	10	20000	10000	50	6214979	14800025	1	130013	0	130038	130038	125498	3	126268	30010	20	10000	20000	20	10000	20000	130038	130038	1	1	20021	10	9	10	10010	10000	10	0	10000	0	0	0	0	0	0	0	1270	2	16	2	3	129525	10000	10000	10000	10010	130039	130039	130039	130039	130042
30024	130073	1053	0	0	130023	119417	25	40010	10010	20000	10000	10	20000	10000	50	6214979	14800025	0	130013	0	130038	130038	125498	3	126268	30010	20	10000	20000	20	10000	20000	130038	130038	1	1	20021	10	9	10	10010	10000	10	0	10000	0	0	0	0	0	0	0	1270	2	16	2	2	129525	10000	10000	10000	10010	130039	130039	130039	130039	130039

Test 3: throughput

Count: 8

Code:

  fcvtns w0, h8
  fcvtns w1, h8
  fcvtns w2, h8
  fcvtns w3, h8
  fcvtns w4, h8
  fcvtns w5, h8
  fcvtns w6, h8
  fcvtns w7, h8

Initialization

  mov x8, 9

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.5005

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

retire uop (01)	cycle (02)	03	mmu table walk data (08)	18	1e	1f	3f	51	schedule uop (52)	schedule int uop (53)	schedule simd uop (54)	dispatch int uop (56)	dispatch simd uop (57)	int uops in schedulers (59)	ldst uops in schedulers (5b)	69	6d	6e	map stall dispatch (70)	map rewind (75)	map stall (76)	dispatch uop (78)	map int uop (7c)	map simd uop (7e)	map int uop inputs (7f)	map simd uop inputs (81)	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	ac	branch cond mispred nonspec (c5)	branch mispred nonspec (cb)	cd	cf	d2	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? int output thing (e9)	? simd retires (ee)	? int retires (ef)	f5	f6	f7	f8	fd
160204	40041	300	0	0	0	0	32	25	240104	80100	160004	100	160020	500	1440132	40022	40041	40041	19977	6	19992	160120	200	160032	200	160032	40041	40041	1	1	80201	100	99	100	80100	100	0	0	0	1	1	1	5117	0	2	16	0	0	40038	80000	80000	80100	40042	40042	40042	40042	40042
160204	40041	300	0	0	0	0	32	25	240104	80100	160004	100	160020	500	1440132	40022	40041	40041	19977	6	19992	160120	200	160032	200	160032	40041	40041	1	1	80201	100	99	100	80100	100	0	0	0	1	1	1	5117	0	0	16	0	0	40038	80000	80000	80100	40042	40042	40042	40042	40042
160204	40041	300	0	0	27	0	32	25	240104	80100	160004	100	160020	500	1440132	40022	40041	40041	19977	6	19992	160120	200	160032	200	160032	40041	40041	1	1	80201	100	99	100	80100	100	0	0	0	1	1	1	5117	0	0	16	0	0	40038	80000	80000	80100	40042	40042	40042	40042	40042
160204	40041	300	0	0	0	0	32	25	240104	80100	160004	100	160020	500	1440132	40022	40041	40041	19977	6	19992	160120	200	160032	200	160032	40041	40041	1	1	80201	100	99	100	80100	100	0	0	0	1	1	1	5117	0	0	16	0	0	40038	80000	80000	80100	40042	40042	40042	40042	40042
160204	40041	300	0	0	0	0	32	25	240104	80100	160004	100	160020	500	1440132	40022	40041	40041	19977	6	19992	160120	200	160032	200	160032	40041	40041	1	1	80201	100	99	100	80100	100	0	0	0	1	1	1	5117	0	0	16	0	0	40038	80000	80000	80100	40042	40042	40042	40042	40042
160204	40041	300	0	0	0	0	32	25	240104	80100	160004	100	160020	500	1440132	40022	40041	40041	19977	6	19992	160120	200	160032	200	160032	40041	40041	1	1	80201	100	99	100	80100	100	0	0	0	1	1	1	5117	0	0	16	0	0	40038	80000	80000	80100	40042	40042	40042	40042	40042
160204	40041	300	0	0	0	0	32	25	240104	80100	160004	100	160020	500	1440132	40022	40041	40041	19977	6	19992	160120	200	160032	200	160032	40041	40041	1	1	80201	100	99	100	80100	100	0	0	0	1	1	1	5117	0	0	16	0	0	40038	80000	80000	80100	40042	40042	40042	40042	40042
160204	40041	299	0	0	0	0	32	25	240104	80100	160004	100	160020	500	1440132	40022	40041	40041	19977	6	19992	160120	200	160032	200	160032	40041	40041	1	1	80201	100	99	100	80100	100	0	0	0	1	1	1	5117	18	0	16	0	0	40038	80000	80000	80100	40042	40042	40042	40042	40042
160204	40041	300	0	0	0	0	32	25	240104	80100	160004	100	160020	500	1440132	40022	40041	40041	19977	6	19992	160120	200	160032	200	160032	40041	40041	1	1	80201	100	99	100	80100	100	0	0	0	1	1	1	5117	0	0	16	0	4	40038	80000	80000	80100	40042	40042	40042	40042	40042
160204	40041	300	0	0	0	0	95	25	240104	80100	160004	100	160020	500	1440132	40022	40041	40041	19977	6	19992	160120	200	160032	200	160032	40041	40041	1	1	80201	100	99	100	80100	100	0	0	0	1	1	1	5117	0	0	16	0	0	40038	80000	80000	80100	40042	40042	40042	40042	40042

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.5005

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

retire uop (01)	cycle (02)	03	l1d tlb fill (05)	1e	3f	51	schedule uop (52)	schedule int uop (53)	schedule simd uop (54)	dispatch int uop (56)	dispatch simd uop (57)	int uops in schedulers (59)	ldst uops in schedulers (5b)	60	69	6d	6e	map stall dispatch (70)	map rewind (75)	map stall (76)	dispatch uop (78)	map int uop (7c)	map simd uop (7e)	map int uop inputs (7f)	map simd uop inputs (81)	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)	d9	dd	fetch restart (de)	e0	? int output thing (e9)	ea	eb	? simd retires (ee)	? int retires (ef)	f5	f6	f7	f8	fd
160024	40055	310	0	0	42	25	240010	80010	160000	10	160000	50	1440000	1	40022	40041	40041	19996	3	20021	160010	20	160000	20	160000	40041	40041	1	1	80021	10	9	10	80010	10	0	0	0	0	0	0	5020	14	16	0	13	11	40038	80000	0	0	80000	80010	40042	40042	40042	40042	40042
160024	40041	310	0	0	42	25	240010	80010	160000	10	160000	50	1440000	0	40022	40041	40041	19996	3	20021	160010	20	160000	20	160000	40041	40041	1	1	80021	10	9	10	80010	10	0	0	0	0	0	0	5020	13	16	0	12	11	40038	80000	0	0	80000	80010	40042	40042	40042	40042	40042
160024	40041	310	0	0	97	25	240010	80010	160000	10	160000	50	1440000	0	40022	40041	40041	19996	3	20021	160010	20	160000	20	160000	40041	40041	1	1	80021	10	9	10	80010	10	4	0	0	0	0	0	5020	12	16	0	12	13	40038	80000	0	0	80000	80010	40042	40042	40042	40042	40042
160024	40041	311	0	0	42	25	240010	80010	160000	10	160000	50	1440000	0	40022	40041	40041	19996	3	20021	160010	20	160000	20	160000	40041	40041	1	1	80021	10	9	10	80010	10	0	0	0	0	0	0	5020	12	16	0	11	11	40038	80000	0	0	80000	80010	40042	40042	40042	40042	40042
160024	40041	311	0	0	42	25	240010	80010	160000	10	160000	50	1440000	0	40022	40041	40041	19996	3	20021	160010	20	160000	20	160000	40041	40041	1	1	80021	10	9	10	80010	10	0	0	0	0	0	0	5020	12	16	0	13	13	40038	80000	0	0	80000	80010	40042	40042	40042	40042	40042
160024	40041	310	0	0	707	25	240010	80010	160000	10	160000	50	1440000	0	40022	40041	40041	19996	3	20021	160010	20	160000	20	160000	40041	40041	1	1	80021	10	9	10	80010	10	0	0	0	0	0	0	5020	12	16	0	13	11	40038	80000	0	0	80000	80010	40042	40042	40042	40042	40042
160024	40041	310	0	0	42	25	240010	80010	160000	10	160000	50	1440000	0	40022	40041	40041	19996	3	20021	160010	20	160000	20	160000	40041	40041	1	1	80021	10	9	10	80010	10	0	0	0	0	0	0	5020	10	16	0	11	12	40038	80000	0	0	80000	80010	40042	40042	40042	40042	40042
160024	40041	310	0	0	42	25	240010	80010	160000	10	160000	50	1440000	0	40022	40041	40041	19996	3	20021	160010	20	160000	20	160000	40041	40041	1	1	80021	10	9	10	80010	10	0	0	0	0	0	0	5020	11	16	0	12	12	40038	80000	0	0	80000	80010	40042	40042	40042	40042	40042
160024	40041	310	0	0	137	25	240010	80010	160000	10	160000	50	1440000	1	40022	40041	40041	19996	3	20021	160010	20	160000	20	160000	40041	40041	1	1	80021	10	9	10	80010	10	0	0	0	0	0	0	5020	12	16	0	10	11	40038	80000	0	0	80000	80010	40042	40042	40042	40042	40042
160024	40041	310	0	0	42	25	240010	80010	160000	10	160000	50	1441862	0	40022	40041	40041	19996	3	20021	160010	20	160000	20	160000	40041	40041	1	1	80021	10	9	10	80010	10	0	0	0	0	0	0	5020	15	16	0	12	12	40038	80000	0	0	80000	80010	40042	40042	40042	40042	40042

FCVTNS (scalar, H to W)

Test 1: uops

1000 unrolls and 1 iteration

Test 2: Latency 1->2 roundtrip

100 unrolls and 100 iterations

1000 unrolls and 10 iterations

Test 3: throughput

100 unrolls and 100 iterations

1000 unrolls and 10 iterations