Icestorm: SUBHN (vector, 4S) measurements

Code:

  subhn v0.4h, v0.4s, v1.4s

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: 0.001

Load/store unit issues: 0.000

SIMD/FP unit issues: 1.000

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

retire uop (01)	cycle (02)	schedule uop (52)	schedule int uop (53)	schedule simd uop (54)	dispatch simd uop (57)	ldst uops in schedulers (5b)	dispatch uop (78)	map simd uop (7e)	map simd uop inputs (81)	? int output thing (e9)	? simd retires (ee)
1004	3033	1001	1	1000	1000	75905	1000	1000	2000	1	1000
1004	3033	1001	1	1000	1000	75905	1000	1000	2000	1	1000
1004	3033	1001	1	1000	1000	75905	1000	1000	2000	1	1000
1004	3033	1001	1	1000	1000	75905	1000	1000	2000	1	1000
1004	3033	1001	1	1000	1000	75905	1000	1000	2000	1	1000
1004	3033	1001	1	1000	1000	75905	1000	1000	2000	1	1000
1004	3033	1001	1	1000	1000	75905	1000	1000	2000	1	1000
1004	3033	1001	1	1000	1000	75905	1000	1000	2000	1	1000
1004	3033	1001	1	1000	1000	75905	1000	1000	2000	1	1000
1004	3033	1001	1	1000	1000	75905	1000	1000	2000	1	1000

Test 2: Latency 1->2

Code:

  subhn v0.4h, v0.4s, v1.4s

Initialization

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

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 3.0033

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

retire uop (01)	cycle (02)	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)	dispatch uop (78)	map int uop (7c)	map simd uop (7e)	map int uop inputs (7f)	map simd uop inputs (81)	? int output thing (e9)	? simd retires (ee)	? int retires (ef)
10204	30033	10101	101	10000	100	10000	300	768905	10100	200	10004	200	20008	1	10000	100
10204	30033	10101	101	10000	100	10000	300	769247	10131	200	10043	200	20008	1	10000	100
10204	30033	10101	101	10000	100	10000	300	768905	10100	200	10004	200	20008	1	10000	100
10204	30033	10101	101	10000	100	10000	300	768905	10100	200	10004	200	20008	1	10000	100
10204	30033	10101	101	10000	100	10000	300	768905	10100	200	10004	200	20008	1	10000	100
10204	30033	10101	101	10000	100	10000	300	768905	10100	200	10004	200	20008	1	10000	100
10204	30033	10101	101	10000	100	10000	300	768905	10100	200	10004	200	20008	1	10000	100
10204	30033	10101	101	10000	100	10000	300	768905	10100	200	10004	200	20008	1	10000	100
10204	30033	10101	101	10000	100	10000	300	768905	10100	200	10004	200	20008	1	10000	100
10204	30033	10101	101	10000	100	10000	300	768905	10100	200	10004	200	20008	1	10000	100

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0033

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

retire uop (01)	cycle (02)	schedule uop (52)	schedule int uop (53)	schedule simd uop (54)	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)	dispatch uop (78)	map int uop (7c)	map ldst uop (7d)	map simd uop (7e)	map int uop inputs (7f)	map simd uop inputs (81)	? int output thing (e9)	? simd retires (ee)	? int retires (ef)
10024	30033	10021	21	10000	20	10000	0	70	0	769247	10051	20	0	10044	20	20000	11	10000	10
10024	30033	10021	21	10000	20	10000	0	70	0	768905	10020	20	0	10000	20	20000	11	10000	10
10024	30033	10021	21	10000	20	10000	0	70	0	768905	10020	20	0	10000	20	20010	11	10000	10
10024	30033	10021	21	10000	20	10000	0	70	0	768905	10020	20	0	10000	20	20000	11	10000	10
10024	30033	10021	21	10000	20	10000	0	70	0	768905	10020	20	0	10000	20	20000	11	10000	10
10024	30033	10021	21	10000	20	10000	0	70	0	768905	10020	20	0	10000	20	20000	11	10000	10
10024	30033	10021	21	10000	20	10000	0	70	0	768905	10020	20	0	10000	20	20000	11	10000	10
10024	30033	10021	21	10000	20	10000	0	70	0	768905	10020	20	0	10000	20	20000	11	10000	10
10024	30033	10021	21	10000	20	10000	0	70	0	768905	10020	20	0	10000	20	20000	11	10000	10
10024	30033	10021	21	10000	20	10000	0	70	0	768905	10020	20	0	10000	20	20000	11	10000	10

Test 3: Latency 1->3

Code:

  subhn v0.4h, v1.4s, v0.4s

Initialization

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

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 3.0033

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

retire uop (01)	cycle (02)	schedule uop (52)	schedule int uop (53)	schedule simd uop (54)	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)	dispatch uop (78)	map int uop (7c)	map ldst uop (7d)	map simd uop (7e)	map int uop inputs (7f)	map simd uop inputs (81)	? int output thing (e9)	? simd retires (ee)	? int retires (ef)
10204	30033	10101	101	10000	100	10000	0	300	0	768905	10100	200	0	10006	200	20008	1	10000	100
10204	30033	10101	101	10000	100	10000	0	300	0	768905	10100	200	0	10004	200	20008	1	10000	100
10204	30033	10101	101	10000	100	10000	0	300	0	768905	10100	200	0	10004	200	20008	1	10000	100
10204	30033	10101	101	10000	100	10000	0	300	0	768905	10100	200	0	10004	200	20008	1	10000	100
10204	30033	10101	101	10000	100	10000	0	300	0	768905	10100	200	0	10004	200	20008	1	10000	100
10204	30033	10101	101	10000	100	10000	0	300	0	768905	10100	200	0	10004	200	20008	1	10000	100
10204	30033	10101	101	10000	100	10000	0	300	0	768905	10100	200	0	10004	200	20008	1	10000	100
10204	30033	10101	101	10000	100	10000	0	300	0	768905	10100	200	0	10004	200	20008	1	10000	100
10204	30033	10101	101	10000	100	10000	0	300	0	768905	10100	200	0	10004	200	20008	1	10000	100
10204	30033	10101	101	10000	100	10000	0	300	0	768905	10100	200	0	10004	200	20008	1	10000	100

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0033

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

retire uop (01)	cycle (02)	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)	dispatch uop (78)	map int uop (7c)	map simd uop (7e)	map int uop inputs (7f)	map simd uop inputs (81)	? int output thing (e9)	? simd retires (ee)	? int retires (ef)
10024	30033	10021	21	10000	20	10000	70	768905	10020	20	10000	20	20000	11	10000	10
10024	30033	10021	21	10000	20	10000	70	768905	10020	20	10000	20	20000	11	10000	10
10024	30033	10021	21	10000	20	10000	70	768905	10020	20	10000	20	20000	11	10000	10
10024	30033	10021	21	10000	20	10000	70	768905	10020	20	10000	20	20000	11	10000	10
10024	30033	10021	21	10000	20	10000	70	768905	10020	20	10000	20	20000	11	10000	10
10024	30033	10021	21	10000	20	10000	70	768905	10020	20	10000	20	20000	11	10000	10
10024	30033	10021	21	10000	20	10000	70	768905	10020	20	10000	20	20000	11	10000	10
10024	30033	10021	21	10000	20	10000	70	768905	10020	20	10000	20	20000	11	10000	10
10024	30033	10021	21	10000	20	10000	70	768905	10020	20	10000	20	20000	11	10000	10
10024	30033	10021	21	10000	20	10000	70	768905	10020	20	10000	20	20000	11	10000	10

Test 4: throughput

Count: 8

Code:

  subhn v0.4h, v8.4s, v9.4s
  subhn v1.4h, v8.4s, v9.4s
  subhn v2.4h, v8.4s, v9.4s
  subhn v3.4h, v8.4s, v9.4s
  subhn v4.4h, v8.4s, v9.4s
  subhn v5.4h, v8.4s, v9.4s
  subhn v6.4h, v8.4s, v9.4s
  subhn v7.4h, v8.4s, v9.4s

Initialization

  movi v8.16b, 9
  movi v9.16b, 10

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.5004

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

retire uop (01)	cycle (02)	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)	dispatch uop (78)	map int uop (7c)	map simd uop (7e)	map int uop inputs (7f)	map simd uop inputs (81)	? int output thing (e9)	? simd retires (ee)	? int retires (ef)
80204	40046	80107	101	80006	100	80010	300	320044	80110	200	80014	200	160028	1	80000	100
80204	40035	80107	101	80006	100	80010	300	320036	80108	200	80012	200	160026	1	80000	100
80204	40035	80105	101	80004	100	80008	300	320036	80108	200	80012	200	160026	1	80000	100
80204	40035	80105	101	80004	100	80008	300	320036	80108	200	80012	200	160024	1	80000	100
80204	40035	80105	101	80004	100	80008	300	320036	80108	200	80012	200	160024	1	80000	100
80204	40035	80105	101	80004	100	80008	300	320036	80108	200	80012	200	160024	1	80000	100
80204	40035	80105	101	80004	100	80008	300	320036	80108	200	80012	200	160024	1	80000	100
80204	40035	80105	101	80004	100	80008	300	320036	80108	200	80012	200	160024	1	80000	100
80204	40035	80105	101	80004	100	80008	300	320036	80108	200	80012	200	160024	1	80000	100
80204	40035	80105	101	80004	100	80008	300	320036	80108	200	80012	200	160024	1	80000	100

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.5004

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

retire uop (01)	cycle (02)	schedule uop (52)	schedule int uop (53)	schedule simd uop (54)	schedule ldst uop (55)	dispatch int uop (56)	dispatch simd uop (57)	int uops in schedulers (59)	ldst uops in schedulers (5b)	dispatch uop (78)	map int uop (7c)	map simd uop (7e)	map int uop inputs (7f)	map simd uop inputs (81)	? int output thing (e9)	? simd retires (ee)	? int retires (ef)
80024	40203	80029	21	80008	0	20	80012	68	320052	80032	20	80018	20	160000	11	80000	10
80024	40038	80021	21	80000	0	20	80000	65	320000	80020	20	80000	20	160000	11	80000	10
80024	40035	80021	21	80000	0	20	80000	65	320000	80020	20	80000	20	160000	11	80000	10
80024	40035	80021	21	80000	0	20	80000	65	320168	80065	20	80050	20	160000	11	80000	10
80024	40035	80021	21	80000	0	20	80000	65	320000	80020	20	80000	20	160000	11	80000	10
80024	40035	80021	21	80000	0	20	80000	65	320000	80020	20	80000	20	160000	11	80000	10
80024	40035	80021	21	80000	0	20	80000	65	320000	80020	20	80000	20	160000	11	80000	10
80024	40035	80021	21	80000	0	20	80000	65	320000	80020	20	80000	20	160000	11	80000	10
80024	40035	80021	21	80000	0	20	80000	65	320000	80020	20	80000	20	160000	11	80000	10
80024	40035	80021	21	80000	0	20	80000	65	320000	80020	20	80000	20	160000	11	80000	10

SUBHN (vector, 4S)

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: throughput

100 unrolls and 100 iterations

1000 unrolls and 10 iterations