Icestorm: FRSQRTE (vector, 4S) measurements

Code:

  frsqrte v0.4s, v0.4s

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	4033	1001	1	1000	1000	50608	1000	1000	1000	1	1000
1004	4033	1001	1	1000	1000	50608	1000	1000	1000	1	1000
1004	4033	1001	1	1000	1000	50608	1000	1000	1000	1	1000
1004	4033	1001	1	1000	1000	50608	1000	1000	1000	1	1000
1004	4033	1001	1	1000	1000	50608	1000	1000	1000	1	1000
1004	4033	1001	1	1000	1000	50608	1000	1000	1000	1	1000
1004	4033	1001	1	1000	1000	50608	1000	1000	1000	1	1000
1004	4033	1001	1	1000	1000	50608	1000	1000	1000	1	1000
1004	4033	1001	1	1000	1000	50608	1000	1000	1000	1	1000
1004	4033	1001	1	1000	1000	50608	1000	1000	1000	1	1000

Test 2: Latency 1->2

Code:

  frsqrte v0.4s, 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): 4.0033

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	40033	10101	101	10000	100	10000	300	509608	10100	200	10006	200	10006	1	10000	100
10205	40066	10105	101	10004	100	10017	300	509608	10100	200	10004	200	10004	1	10000	100
10204	40033	10101	101	10000	100	10000	300	509608	10100	200	10004	200	10004	1	10000	100
10204	40033	10101	101	10000	100	10000	300	509608	10100	200	10004	202	10034	1	10000	100
10204	40033	10101	101	10000	100	10000	300	509608	10100	200	10004	200	10004	1	10000	100
10204	40033	10101	101	10000	100	10000	300	509608	10100	200	10004	200	10004	1	10000	100
10204	40033	10101	101	10000	100	10000	300	509608	10100	200	10004	200	10004	1	10000	100
10204	40033	10101	101	10000	100	10000	300	509608	10100	200	10004	200	10004	1	10000	100
10204	40033	10101	101	10000	100	10000	300	509608	10100	200	10004	200	10004	1	10000	100
10204	40033	10101	101	10000	100	10000	300	509608	10100	200	10004	200	10004	1	10000	100

1000 unrolls and 10 iterations

Result (median cycles for code): 4.0033

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	40033	10021	21	10000	20	10000	70	509608	10020	20	10006	20	10000	11	10000	10
10024	40033	10021	21	10000	20	10000	70	509608	10020	20	10000	20	10000	11	10000	10
10024	40033	10021	21	10000	20	10000	70	509608	10020	20	10000	20	10000	11	10000	10
10024	40033	10021	21	10000	20	10000	70	509608	10020	20	10000	20	10000	11	10000	10
10025	40066	10025	21	10004	20	10017	70	509608	10020	20	10000	20	10000	11	10000	10
10024	40033	10021	21	10000	20	10000	70	509608	10020	20	10000	20	10000	11	10000	10
10024	40033	10021	21	10000	20	10000	70	509608	10020	20	10000	20	10000	11	10000	10
10024	40033	10021	21	10000	20	10000	70	509608	10020	20	10000	20	10000	11	10000	10
10024	40033	10021	21	10000	20	10000	70	509608	10020	20	10000	20	10000	11	10000	10
10024	40033	10021	21	10000	20	10000	70	509608	10020	20	10000	20	10000	11	10000	10

Test 3: throughput

Count: 8

Code:

  frsqrte v0.4s, v8.4s
  frsqrte v1.4s, v8.4s
  frsqrte v2.4s, v8.4s
  frsqrte v3.4s, v8.4s
  frsqrte v4.4s, v8.4s
  frsqrte v5.4s, v8.4s
  frsqrte v6.4s, v8.4s
  frsqrte v7.4s, v8.4s

Initialization

  movi v8.16b, 9

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 2.0004

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	160035	80101	101	80000	100	80000	300	1999769	80100	200	80004	200	80035	1	80000	100
80204	160035	80101	101	80000	100	80000	300	1999769	80100	200	80004	200	80004	1	80000	100
80204	160035	80101	101	80000	100	80000	300	1999769	80100	200	80004	200	80004	1	80000	100
80204	160035	80101	101	80000	100	80000	300	1999932	80122	200	80036	200	80004	1	80000	100
80205	160070	80110	101	80009	100	80022	300	1999769	80100	200	80004	200	80004	1	80000	100
80204	160085	80114	101	80013	100	80024	300	1999769	80100	200	80004	200	80004	1	80000	100
80204	160035	80101	101	80000	100	80000	300	2000287	80148	200	80064	200	80004	1	80000	100
80204	160035	80101	101	80000	100	80000	300	2000805	80196	200	80126	200	80036	1	80000	100
80204	160035	80101	101	80000	100	80000	300	2000287	80148	200	80064	200	80004	1	80000	100
80204	160035	80101	101	80000	100	80000	300	1999769	80100	200	80004	200	80064	1	80000	100

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 2.0004

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)
80024	160035	80021	21	80000	20	80000	0	70	0	1999769	80020	20	0	80004	20	80000	11	80000	10
80024	160035	80021	21	80000	20	80000	0	70	0	1999769	80020	20	0	80000	20	80000	11	80000	10
80024	160035	80021	21	80000	20	80000	0	68	0	1999932	80042	20	0	80036	20	80000	11	80000	10
80024	160035	80021	21	80000	20	80000	0	70	0	1999769	80020	20	0	80000	20	80000	11	80000	10
80024	160035	80021	21	80000	20	80000	0	70	0	1999769	80020	20	0	80000	20	80000	11	80000	10
80024	160035	80021	21	80000	20	80000	0	70	0	1999769	80020	20	0	80000	20	80000	11	80000	10
80024	160035	80021	21	80000	20	80000	0	70	0	1999769	80020	20	0	80000	20	80029	11	80000	10
80024	160035	80021	21	80000	20	80000	0	70	0	1999769	80020	20	0	80000	20	80000	11	80000	10
80024	160035	80021	21	80000	20	80000	0	70	0	1999769	80020	20	0	80000	20	80000	11	80000	10
80024	160035	80021	21	80000	20	80000	0	70	0	1999769	80020	20	0	80000	20	80000	11	80000	10

FRSQRTE (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: throughput

100 unrolls and 100 iterations

1000 unrolls and 10 iterations