Icestorm: SQSHRN (4S) measurements

Code:

  sqshrn v0.4h, v0.4s, #3

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	1000	1	1000
1004	3033	1001	1	1000	1000	75905	1000	1000	1000	1	1000
1004	3033	1001	1	1000	1000	75905	1000	1000	1000	1	1000
1004	3033	1001	1	1000	1000	75905	1000	1000	1000	1	1000
1004	3033	1001	1	1000	1000	75905	1000	1000	1000	1	1000
1004	3033	1001	1	1000	1000	75905	1000	1000	1000	1	1000
1004	3033	1001	1	1000	1000	75905	1000	1000	1000	1	1000
1004	3033	1001	1	1000	1000	75905	1000	1000	1000	1	1000
1004	3033	1001	1	1000	1000	75905	1000	1000	1000	1	1000
1004	3033	1001	1	1000	1000	75905	1000	1000	1000	1	1000

Test 2: Latency 1->2

Code:

  sqshrn v0.4h, v0.4s, #3

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	10006	200	10006	1	10000	100
10204	30033	10101	101	10000	100	10000	300	768905	10100	200	10004	200	10004	1	10000	100
10204	30033	10101	101	10000	100	10000	300	768905	10100	200	10004	200	10004	1	10000	100
10204	30033	10101	101	10000	100	10000	307	769247	10133	202	10046	200	10004	1	10000	100
10204	30033	10101	101	10000	100	10000	300	768905	10100	200	10004	200	10004	1	10000	100
10204	30033	10101	101	10000	100	10000	300	768905	10100	200	10004	200	10044	1	10000	100
10204	30033	10101	101	10000	100	10000	300	768905	10100	200	10004	200	10005	1	10000	100
10204	30033	10101	101	10000	100	10000	300	768905	10100	200	10006	200	10004	1	10000	100
10204	30033	10101	101	10000	100	10000	300	768905	10100	200	10004	200	10004	1	10000	100
10204	30033	10101	101	10000	100	10000	300	768905	10100	200	10004	200	10004	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	10004	20	10000	11	10000	10
10024	30033	10021	21	10000	20	10000	70	768905	10020	20	10000	20	10000	11	10000	10
10024	30033	10021	21	10000	20	10000	70	768905	10020	20	10000	20	10000	11	10000	10
10024	30033	10021	21	10000	20	10000	70	768905	10020	20	10000	20	10000	11	10000	10
10024	30033	10021	21	10000	20	10000	70	768905	10020	20	10000	20	10000	11	10000	10
10024	30033	10021	21	10000	20	10000	70	768905	10020	20	10000	20	10000	11	10000	10
10024	30033	10021	21	10000	20	10000	70	768905	10020	20	10000	20	10000	11	10000	10
10024	30033	10021	21	10000	20	10000	70	768905	10020	20	10000	20	10000	11	10000	10
10024	30033	10021	21	10000	20	10000	70	768905	10020	20	10000	20	10000	11	10000	10
10024	30033	10021	21	10000	20	10000	70	768905	10020	20	10000	20	10000	11	10000	10

Test 3: throughput

Count: 8

Code:

  sqshrn v0.4h, v8.4s, #3
  sqshrn v1.4h, v8.4s, #3
  sqshrn v2.4h, v8.4s, #3
  sqshrn v3.4h, v8.4s, #3
  sqshrn v4.4h, v8.4s, #3
  sqshrn v5.4h, v8.4s, #3
  sqshrn v6.4h, v8.4s, #3
  sqshrn v7.4h, v8.4s, #3

Initialization

  movi v8.16b, 9

(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)	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)
80204	40037	80105	101	80004	100	80008	0	300	0	320036	80108	200	0	80012	200	80012	1	80000	100
80204	40035	80107	101	80006	100	80010	0	300	0	320036	80108	200	0	80012	200	80012	1	80000	100
80204	40035	80105	101	80004	100	80008	0	300	0	320036	80108	200	0	80012	200	80012	1	80000	100
80205	40070	80141	101	80040	100	80052	0	300	0	320044	80110	200	0	80014	200	80012	1	80000	100
80204	40035	80105	101	80004	100	80008	0	300	0	320036	80108	200	0	80012	200	80014	1	80000	100
80205	40079	80141	101	80040	100	80052	0	300	0	320036	80108	200	0	80012	200	80014	1	80000	100
80204	40035	80105	101	80004	100	80008	0	300	0	320036	80108	200	0	80012	200	80012	1	80000	100
80204	40035	80105	101	80004	100	80008	0	300	0	320036	80108	200	0	80012	200	80012	1	80000	100
80204	40035	80105	101	80004	100	80008	4092	162164	108689	116462	37623	7228	5046	28577	200	80012	1	80000	100
80204	40035	80105	101	80004	100	80008	0	300	0	320036	80108	200	0	80012	200	80012	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)	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 ldst uop inputs (80)	map simd uop inputs (81)	? int output thing (e9)	? ldst retires (ed)	? simd retires (ee)	? int retires (ef)
80026	40357	80063	21	80042	20	80054	70	320052	80032	20	80018	20	0	80018	11	0	80000	10
80024	40047	80021	21	80000	20	80000	70	320000	80020	20	80000	20	0	80000	11	0	80000	10
80024	40035	80021	21	80000	20	80000	70	320000	80020	20	80000	20	0	80000	11	0	80000	10
80024	40035	80021	21	80000	20	80000	70	320212	80075	20	80067	20	0	80000	11	0	80000	10
80024	40035	80021	21	80000	20	80000	70	320000	80020	20	80000	20	0	80000	11	0	80000	10
80024	40035	80021	21	80000	20	80000	70	320000	80020	20	80000	20	0	80000	11	0	80000	10
80024	40035	80021	21	80000	20	80000	70	320000	80020	20	80000	20	0	80000	11	0	80000	10
80024	40035	80021	21	80000	20	80000	70	320000	80020	20	80000	20	0	80000	11	0	80000	10
80024	40035	80021	21	80000	20	80000	70	320000	80020	20	80000	20	0	80000	11	0	80000	10
80024	40035	80021	21	80000	20	80000	70	320000	80020	20	80000	20	0	80000	11	0	80000	10

SQSHRN (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: throughput

100 unrolls and 100 iterations

1000 unrolls and 10 iterations