Firestorm: CLZ (vector, 4H) measurements

Code:

  clz v0.4h, v0.4h

Initialization

  movi v0.16b, 1
  movi v1.16b, 2

(no loop instructions)

1000 unrolls and 1 iteration

Retires: 1.000

Issues: 1.000

Integer unit issues: 0.000

Load/store unit issues: 0.000

SIMD/FP unit issues: 1.000

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

retire uop (01)	cycle (02)	03	mmu table walk instruction (07)	1e	3f	4e	51	schedule uop (52)	schedule simd uop (54)	dispatch simd uop (57)	ldst uops in schedulers (5b)	60	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 simd alu (9a)	l1d cache writeback (a8)	ac	cf	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? simd retires (ee)	f5	f6	f7	f8	fd
1004	2037	15	0	0	61	1686	25	1000	1000	1000	264521	1	2018	2037	2037	1571	3	1895	1000	1000	1000	2037	2037	1	1	1001	1000	0	0	73	3	16	3	3	1784	1000	2038	2038	2038	2038	2038
1004	2037	15	0	0	61	1686	25	1000	1000	1000	264521	1	2018	2037	2037	1571	3	1895	1000	1000	1000	2037	2037	1	1	1001	1000	0	0	73	2	16	3	3	1784	1000	2038	2038	2038	2038	2038
1004	2037	15	0	0	82	1686	25	1000	1000	1000	264521	1	2018	2037	2037	1571	3	1895	1000	1000	1000	2037	2037	1	1	1001	1000	0	0	73	2	16	2	2	1786	1000	2038	2038	2038	2038	2038
1004	2037	15	0	0	61	1686	25	1000	1000	1000	264521	1	2018	2037	2037	1571	3	1895	1000	1000	1000	2037	2037	1	1	1001	1000	0	0	75	2	16	3	3	1786	1000	2038	2038	2038	2038	2038
1004	2037	15	0	0	61	1686	25	1000	1000	1000	264521	1	2018	2037	2037	1571	3	1895	1000	1000	1000	2037	2037	1	1	1001	1000	0	0	75	3	16	2	3	1784	1000	2038	2038	2038	2038	2038
1004	2037	15	0	0	138	1686	25	1000	1000	1000	264521	1	2018	2037	2037	1570	3	1895	1000	1000	1000	2037	2037	1	1	1001	1000	0	0	73	2	16	2	2	1786	1000	2038	2038	2038	2038	2038
1004	2037	15	0	0	61	1686	25	1000	1000	1000	264521	1	2018	2037	2037	1571	3	1895	1000	1000	1000	2037	2037	1	1	1001	1000	0	0	75	2	16	2	2	1786	1000	2038	2038	2038	2038	2038
1004	2037	15	1	0	61	1686	25	1000	1000	1000	264521	1	2018	2037	2037	1571	3	1895	1000	1000	1000	2037	2037	1	1	1001	1000	0	0	75	2	16	2	2	1786	1000	2038	2038	2038	2038	2038
1004	2037	15	0	0	61	1686	25	1000	1000	1000	264521	1	2018	2037	2037	1570	3	1895	1000	1000	1000	2037	2037	1	1	1001	1000	0	0	73	2	16	2	2	1786	1000	2038	2038	2038	2038	2038
1004	2037	15	0	30	156	1686	25	1000	1000	1000	264521	1	2018	2037	2037	1571	3	1895	1000	1000	1000	2037	2037	1	1	1001	1000	0	0	75	3	16	2	2	1786	1000	2038	2038	2038	2038	2038

Test 2: Latency 1->2

Code:

  clz v0.4h, v0.4h

Initialization

  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 2.0037

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

retire uop (01)	cycle (02)	03	09	l2 tlb miss data (0b)	1e	3f	4e	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	61	69	6b	6d	6e	map stall dispatch (70)	simd prf full (72)	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)	inst simd alu (9a)	9f	l1d cache writeback (a8)	ac	cf	d0	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? simd retires (ee)	? int retires (ef)	f5	f6	f7	f8	fd
10204	20037	151	0	0	0	61	19686	25	10100	100	10000	100	10000	500	2847521	1	0	20018	0	20037	20037	18421	0	3	18745	10100	200	10000	200	10000	20037	20037	1	1	10201	100	99	100	100	10000	100	0	0	710	0	1	16	1	1	19791	10000	100	20038	20038	20038	20038	20038
10204	20037	150	0	0	0	61	19686	25	10100	100	10000	100	10000	500	2847521	1	0	20018	0	20037	20037	18421	0	3	18745	10100	200	10000	200	10000	20037	20037	1	1	10201	100	99	100	100	10000	100	0	0	710	0	1	16	1	1	19791	10000	100	20038	20038	20038	20038	20038
10204	20037	150	0	0	0	61	19686	25	10100	100	10000	100	10000	500	2847521	1	0	20018	0	20037	20037	18421	0	3	18745	10100	200	10000	200	10000	20037	20037	1	1	10201	100	99	100	100	10000	100	0	0	710	0	1	16	1	1	19791	10000	100	20038	20038	20038	20038	20038
10204	20037	150	0	0	0	61	19686	25	10100	100	10000	100	10000	500	2847521	0	0	20018	0	20037	20037	18421	0	3	18745	10100	200	10000	200	10000	20037	20037	1	1	10201	100	99	100	100	10000	100	0	0	710	0	1	16	1	1	19791	10000	100	20038	20038	20038	20038	20038
10204	20037	150	0	0	198	61	19686	25	10100	100	10000	100	10000	500	2847521	1	0	20018	0	20037	20037	18421	0	3	18745	10100	200	10000	200	10000	20037	20037	1	1	10201	100	99	100	100	10000	100	0	0	710	0	1	16	1	1	19791	10000	100	20038	20038	20038	20038	20038
10204	20037	150	0	0	0	61	19686	25	10100	100	10000	100	10000	500	2847521	1	0	20018	0	20037	20037	18421	0	3	18745	10100	200	10000	200	10000	20037	20037	1	1	10201	100	99	100	100	10000	100	0	0	710	0	1	16	1	1	19791	10000	100	20038	20038	20038	20038	20038
10204	20037	150	0	0	0	61	19686	25	10100	100	10000	100	10000	500	2847521	1	0	20018	0	20037	20037	18421	0	3	18745	10100	200	10000	200	10000	20037	20037	1	1	10201	100	99	100	100	10000	100	0	0	710	0	1	16	1	1	19791	10000	100	20038	20038	20038	20038	20038
10204	20037	150	0	0	0	61	19686	25	10100	100	10000	100	10000	500	2847521	0	0	20018	0	20037	20037	18421	0	3	18745	10100	200	10000	200	10000	20037	20037	1	1	10201	100	99	100	100	10000	100	0	0	710	0	1	16	1	1	19791	10000	100	20038	20038	20038	20038	20038
10204	20037	150	0	0	0	61	19686	25	10100	100	10000	100	10000	500	2847521	1	0	20018	0	20037	20037	18421	0	3	18745	10100	200	10000	200	10000	20037	20037	1	1	10201	100	99	100	100	10000	100	0	0	710	0	1	16	1	1	19791	10000	100	20038	20038	20038	20038	20038
10204	20037	150	0	0	0	124	19686	25	10100	100	10000	100	10000	500	2847521	1	0	20018	0	20037	20037	18421	0	3	18745	10100	200	10000	200	10000	20037	20037	1	1	10201	100	99	100	100	10000	100	43	0	710	0	1	16	1	1	19791	10000	100	20038	20038	20038	20038	20038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

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	4e	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)	inst simd alu (9a)	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)	? simd retires (ee)	? int retires (ef)	f5	f6	f7	f8	fd
10024	20037	150	0	0	0	0	0	0	61	19686	25	10010	10	10000	10	10000	50	2847521	20018	20037	20037	18443	3	18767	10010	20	10000	20	10000	20037	20037	1	1	10021	10	9	10	10	10000	10	0	0	0	0	0	0	0	0	640	4	16	3	4	19786	0	10000	10	20038	20038	20038	20038	20038
10024	20037	150	0	0	0	0	0	0	61	19686	25	10010	10	10000	10	10000	50	2847521	20018	20037	20037	18443	3	18767	10010	20	10000	20	10000	20037	20037	1	1	10021	10	9	10	10	10000	10	0	0	0	0	0	0	0	0	640	4	16	3	4	19786	0	10000	10	20038	20038	20038	20038	20038
10024	20037	150	0	0	0	0	0	0	61	19686	25	10010	10	10000	10	10000	50	2847521	20018	20037	20037	18443	3	18767	10010	20	10000	20	10000	20037	20037	1	1	10021	10	9	10	10	10000	10	0	0	0	0	0	0	0	0	640	4	16	3	4	19786	0	10000	10	20038	20038	20038	20038	20038
10024	20037	150	0	0	0	0	0	0	708	19686	25	10010	10	10000	10	10000	50	2847521	20018	20037	20037	18443	3	18767	10010	20	10000	20	10000	20037	20037	1	1	10021	10	9	10	10	10000	10	0	0	0	0	0	0	0	0	640	4	16	4	3	19786	0	10000	10	20038	20038	20038	20038	20038
10024	20037	150	0	0	0	0	0	0	61	19686	25	10010	10	10000	10	10000	50	2847521	20018	20037	20037	18443	3	18767	10010	20	10000	20	10000	20037	20037	1	1	10021	10	9	10	10	10000	10	0	0	0	0	0	0	0	0	640	4	16	3	4	19786	0	10000	10	20038	20038	20038	20038	20038
10024	20037	150	0	0	0	0	0	0	124	19686	25	10010	10	10000	10	10000	50	2847521	20018	20037	20037	18443	3	18767	10010	20	10000	20	10000	20037	20037	1	1	10021	10	9	10	10	10000	10	0	0	0	0	0	0	0	0	640	4	16	4	3	19786	0	10000	10	20038	20038	20038	20038	20038
10024	20037	150	0	0	0	0	0	0	61	19686	25	10010	10	10000	10	10000	50	2847521	20018	20037	20037	18443	3	18767	10010	20	10000	20	10000	20037	20037	1	1	10021	10	9	10	10	10000	10	0	0	0	0	0	0	0	0	640	4	16	3	4	19786	0	10000	10	20038	20038	20038	20038	20038
10024	20037	150	0	0	0	0	0	0	61	19686	25	10010	10	10000	10	10000	50	2847521	20018	20037	20037	18443	3	18767	10010	20	10000	20	10000	20037	20037	1	1	10021	10	9	10	10	10000	10	0	0	0	0	0	0	0	0	640	3	16	4	4	19786	0	10000	10	20038	20038	20038	20038	20038
10024	20037	150	0	0	0	0	0	0	699	19686	25	10010	10	10000	10	10000	50	2847521	20018	20037	20037	18443	3	18767	10010	20	10000	20	10000	20037	20037	1	1	10021	10	9	10	10	10000	10	0	0	0	0	0	0	0	0	640	3	16	4	3	19786	0	10000	10	20038	20038	20038	20038	20038
10024	20037	150	0	0	0	0	0	0	706	19686	25	10010	10	10000	10	10000	50	2847521	20018	20037	20037	18443	3	18767	10010	20	10000	20	10000	20226	20037	1	1	10021	10	9	10	10	10000	10	0	0	0	0	0	0	0	0	640	4	16	3	2	19786	0	10000	10	20038	20038	20038	20038	20038

Test 3: throughput

Count: 8

Code:

  clz v0.4h, v8.4h
  clz v1.4h, v8.4h
  clz v2.4h, v8.4h
  clz v3.4h, v8.4h
  clz v4.4h, v8.4h
  clz v5.4h, v8.4h
  clz v6.4h, v8.4h
  clz v7.4h, v8.4h

Initialization

  movi v8.16b, 9

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.2505

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

retire uop (01)	cycle (02)	03	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)	inst simd alu (9a)	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	? simd retires (ee)	? int retires (ef)	f5	f6	f7	f8	fd
80204	20109	150	29	25	80108	100	80008	100	80020	500	640132	1	20019	20038	20038	9977	6	9989	80120	200	80032	200	80032	20038	20144	1	1	80201	100	99	100	100	80000	100	0	0	1	1	1	5118	4	16	3	3	20035	80000	100	20039	20039	20039	20039	20039
80204	20038	150	738	25	80108	100	80008	100	80020	500	640132	1	20019	20038	20038	9977	6	9989	80120	200	80032	200	80032	20038	20038	1	1	80201	100	99	100	100	80000	100	1	0	1	1	1	5118	3	16	3	3	20035	80000	100	20039	20039	20039	20039	20039
80204	20038	150	777	25	80108	100	80008	100	80020	500	640132	1	20019	20038	20038	9977	6	9989	80120	200	80032	200	80032	20038	20038	1	1	80201	100	99	100	100	80000	100	0	0	1	1	1	5118	3	16	2	3	20035	80000	100	20039	20039	20039	20039	20039
80204	20038	150	29	25	80108	100	80008	100	80020	500	640132	1	20019	20038	20038	9977	6	9989	80120	200	80032	200	80032	20038	20038	1	1	80201	100	99	100	100	80000	100	0	0	1	1	1	5118	3	16	4	3	20035	80000	100	20039	20039	20039	20039	20039
80204	20038	150	829	25	80108	100	80008	100	80020	500	640132	1	20019	20038	20038	9977	6	9989	80120	200	80032	200	80032	20038	20038	1	1	80201	100	99	100	100	80000	100	0	0	1	1	1	5118	2	16	3	3	20035	80000	100	20039	20039	20039	20039	20039
80204	20038	150	29	25	80108	100	80008	100	80020	500	640132	1	20019	20038	20038	9977	6	9989	80120	200	80032	200	80032	20038	20038	1	1	80201	100	99	100	100	80000	100	0	0	1	1	1	5118	4	16	4	4	20035	80000	100	20039	20039	20039	20039	20039
80204	20038	150	29	25	80108	100	80008	100	80020	500	640132	1	20019	20038	20038	9977	6	9989	80120	200	80032	200	80032	20038	20038	1	1	80201	100	99	100	100	80000	100	0	0	1	1	1	5118	3	16	4	4	20035	80000	100	20039	20039	20039	20039	20039
80204	20038	150	29	25	80108	100	80008	100	80020	500	640132	1	20019	20038	20038	9977	6	9989	80120	200	80032	200	80032	20038	20038	1	1	80201	100	99	100	100	80000	100	0	0	1	1	1	5118	3	16	3	3	20035	80000	100	20039	20039	20039	20039	20039
80204	20038	150	314	25	80108	100	80008	100	80020	500	640132	1	20019	20038	20038	9977	6	9989	80120	200	80032	200	80032	20038	20038	1	1	80201	100	99	100	100	80000	100	0	0	1	1	1	5118	3	16	3	3	20035	80000	100	20039	20039	20039	20039	20039
80204	20038	150	864	25	80108	100	80008	100	80020	500	640132	1	20019	20038	20038	9977	6	9989	80120	200	80032	200	80032	20038	20038	1	1	80201	100	99	100	100	80000	100	0	0	1	1	1	5118	2	16	3	2	20035	80000	100	20039	20039	20039	20039	20039

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.2505

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

retire uop (01)	cycle (02)	03	18	1e	3a	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)	inst simd alu (9a)	9f	l1d tlb access (a0)	l1d tlb miss (a1)	l1d cache writeback (a8)	a9	ac	cf	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? simd retires (ee)	? int retires (ef)	f5	f6	f7	f8	fd
80024	20050	150	0	0	0	81	25	80010	10	80000	10	80000	50	640000	0	20019	20038	20038	9996	3	10018	80010	20	80000	20	80000	20038	20038	1	1	80021	10	9	10	10	80000	10	0	0	0	0	0	5020	17	16	13	6	20035	80000	10	20039	20039	20039	20039	20039
80024	20038	150	0	0	0	39	25	80010	10	80000	10	80000	50	640000	0	20019	20038	20038	9996	3	10018	80010	20	80000	20	80000	20038	20038	1	1	80021	10	9	10	10	80000	10	0	0	0	0	0	5020	6	16	6	15	20035	80000	10	20039	20039	20039	20039	20092
80024	20038	150	1	3	0	39	25	80010	10	80094	10	80000	50	640000	0	20019	20038	20038	9996	3	10018	80010	20	80000	20	80000	20038	20038	1	1	80021	10	9	10	10	80000	10	4	2	0	4	3	5037	16	16	16	16	20035	80000	10	20039	20039	20039	20039	20039
80024	20038	150	0	0	0	39	25	80010	10	80000	10	80000	50	640000	0	20019	20038	20038	9996	3	10018	80010	20	80000	20	80000	20038	20038	1	1	80021	10	9	10	10	80000	10	0	0	0	0	3	5020	6	16	16	16	20035	80000	10	20039	20039	20039	20039	20039
80024	20038	150	0	0	0	39	25	80010	10	80000	10	80000	50	640000	0	20019	20038	20038	9996	3	10018	80010	20	80000	20	80000	20038	20038	1	1	80021	10	9	10	10	80000	10	0	0	0	0	3	5020	6	16	16	6	20035	80000	10	20039	20039	20039	20039	20039
80024	20038	150	0	0	0	81	25	80010	10	80000	10	80000	50	640000	1	20019	20038	20038	9996	3	10018	80010	20	80000	20	80000	20038	20038	1	1	80021	10	9	10	10	80000	10	0	0	0	0	0	5020	16	16	15	15	20035	80000	10	20039	20039	20039	20039	20039
80024	20038	150	0	0	0	81	25	80010	10	80000	10	80000	50	640000	1	20019	20038	20038	9996	3	10018	80010	20	80096	20	80000	20038	20038	1	1	80021	10	9	10	10	80000	10	0	0	0	0	18	5020	6	16	6	13	20035	80000	10	20089	20039	20039	20039	20039
80024	20038	150	0	36	0	39	25	80010	10	80000	10	80000	50	640000	0	20019	20038	20038	9996	3	10018	80010	20	80000	20	80000	20038	20038	1	1	80021	10	9	10	10	80000	10	0	0	0	0	0	5020	17	16	16	16	20035	80000	10	20039	20039	20039	20039	20039
80024	20038	150	0	0	0	39	25	80010	10	80000	10	80000	50	640000	1	20019	20038	20038	9996	3	10018	80010	20	80000	20	80000	20038	20038	1	1	80021	10	9	10	10	80000	10	0	0	0	0	0	5020	16	16	16	16	20035	80000	10	20039	20039	20039	20039	20039
80024	20038	150	0	3	0	39	25	80010	10	80000	10	80000	50	640000	0	20019	20038	20038	9996	3	10018	80010	20	80000	20	80000	20038	20038	1	1	80021	10	9	10	10	80000	10	0	0	0	0	0	5020	6	16	6	16	20035	80000	10	20039	20039	20039	20039	20039

CLZ (vector, 4H)

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: throughput

100 unrolls and 100 iterations

1000 unrolls and 10 iterations