Icestorm: FCVTZU (scalar, fixed-point, S to W) measurements

Code:

  fcvtzu w0, s0, #3

Initialization

  mov x0, 1
  mov x1, 2

(no loop instructions)

1000 unrolls and 1 iteration

Retires: 2.000

Issues: 3.000

Integer unit issues: 1.001

Load/store unit issues: 0.000

SIMD/FP unit issues: 2.000

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)	? int retires (ef)
2004	1043	3001	1001	2000	2000	11000	2000	2000	2000	1001	1000	1000
2004	1037	3001	1001	2000	2000	11000	2000	2000	2000	1001	1000	1000
2004	1037	3001	1001	2000	2000	11000	2000	2000	2000	1001	1000	1000
2004	1037	3001	1001	2000	2000	11000	2000	2000	2000	1001	1000	1000
2004	1037	3001	1001	2000	2000	11000	2000	2000	2000	1001	1000	1000
2004	1037	3001	1001	2000	2000	11000	2000	2000	2000	1001	1000	1000
2004	1037	3001	1001	2000	2000	11000	2000	2000	2000	1001	1000	1000
2004	1037	3001	1001	2000	2000	11000	2000	2000	2000	1001	1000	1000
2004	1037	3001	1001	2000	2000	11000	2000	2000	2000	1001	1000	1000
2004	1037	3001	1001	2000	2000	11000	2000	2000	2000	1001	1000	1000

Test 2: Latency 1->2 roundtrip

Code:

  fcvtzu w0, s0, #3
  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): 10.0032

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)	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 ldst uop inputs (80)	map simd uop inputs (81)	? int output thing (e9)	? ldst retires (ed)	? simd retires (ee)	? int retires (ef)
30204	100032	40101	10101	20000	10000	100	20000	10000	300	1546786	2578206	30100	200	10002	20004	200	10002	20004	10001	10000	10000	10100
30204	100032	40101	10101	20000	10000	100	20000	10000	300	1546796	2578206	30100	200	10001	20003	200	10001	20003	10001	10000	10000	10100
30204	100032	40101	10101	20000	10000	100	20000	10000	300	1546796	2578206	30100	200	10001	20003	200	10001	20003	10001	10000	10000	10100
30204	100032	40101	10101	20000	10000	100	20000	10000	300	1546796	2578206	30100	200	10001	20003	200	10001	20003	10001	10000	10000	10100
30204	100032	40101	10101	20000	10000	100	20000	10000	300	1546796	2578206	30100	200	10001	20003	200	10001	20003	10001	10000	10000	10100
30205	100062	40107	10102	20003	10002	100	20028	10000	300	1547059	2578622	30100	200	10001	20003	200	10001	20003	10001	10000	10000	10100
30204	100032	40101	10101	20000	10000	100	20000	10000	300	1546796	2578206	30100	200	10001	20003	200	10001	20003	10001	10000	10000	10100
30204	100032	40101	10101	20000	10000	100	20000	10000	300	1546796	2578206	30100	200	10001	20003	200	10001	20003	10001	10000	10000	10100
30204	100032	40101	10101	20000	10000	100	20000	10000	300	1546796	2578206	30100	200	10001	20003	200	10001	20003	10001	10000	10000	10100
30204	100032	40101	10101	20000	10000	100	20000	10000	300	1546796	2578206	30100	200	10001	20003	200	10001	20003	10001	10000	10000	10100

1000 unrolls and 10 iterations

Result (median cycles for code): 10.0032

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)	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 ldst uop inputs (80)	map simd uop inputs (81)	? int output thing (e9)	? ldst retires (ed)	? simd retires (ee)	? int retires (ef)
30024	100032	40011	10011	20000	10000	10	20000	10000	30	1546346	2578206	30010	20	10000	20000	20	10000	20000	10001	10000	10000	10010
30024	100032	40011	10011	20000	10000	10	20000	10000	30	1546346	2578206	30010	20	10000	20000	20	10000	20000	10001	10000	10000	10010
30024	100032	40011	10011	20000	10000	10	20000	10000	30	1546346	2578206	30010	20	10000	20000	20	10000	20000	10001	10000	10000	10010
30024	100032	40011	10011	20000	10000	10	20000	10106	30	1551592	2587144	30296	20	10110	20220	20	10000	20000	10001	10000	10000	10010
30024	100032	40011	10011	20000	10000	10	20000	10000	30	1546346	2578206	30010	20	10000	20000	20	10000	20000	10001	10000	10000	10010
30024	100032	40011	10011	20000	10000	10	20000	10035	30	1548134	2581246	30105	20	10035	20071	20	10038	20074	10005	10000	10000	10010
30024	100032	40011	10011	20000	10000	10	20000	10000	30	1546346	2578206	30010	20	10000	20000	20	10000	20000	10001	10000	10000	10010
30025	100065	40017	10012	20004	10001	10	20030	10000	30	1546460	2578388	30010	20	10000	20000	20	10000	20000	10001	10000	10000	10010
30024	100034	40011	10011	20000	10000	10	20000	10000	30	1546346	2578206	30010	20	10000	20000	20	10000	20000	10001	10000	10000	10010
30024	100032	40011	10011	20000	10000	10	20000	10139	30	1555988	2594208	30389	20	10140	20287	20	10071	20144	10009	10000	10000	10010

Test 3: throughput

Count: 8

Code:

  fcvtzu w0, s8, #3
  fcvtzu w1, s8, #3
  fcvtzu w2, s8, #3
  fcvtzu w3, s8, #3
  fcvtzu w4, s8, #3
  fcvtzu w5, s8, #3
  fcvtzu w6, s8, #3
  fcvtzu w7, s8, #3

Initialization

  mov x8, 9

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 1.0005

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 ldst uop inputs (80)	map simd uop inputs (81)	? int output thing (e9)	? ldst retires (ed)	? simd retires (ee)	? int retires (ef)
160204	80057	240103	80101	160002	0	100	160008	300	880041	160108	200	160012	200	0	160012	80001	0	80000	80100
160204	80046	240103	80101	160002	0	100	160008	300	880041	160108	200	160012	200	0	160012	80001	0	80000	80100
160204	80037	240103	80101	160002	0	100	160008	300	880041	160108	200	160012	200	0	160012	80001	0	80000	80100
160204	80037	240103	80101	160002	0	100	160008	300	880041	160108	200	160012	200	0	160012	80001	0	80000	80100
160204	80037	240103	80101	160002	0	100	160008	300	880041	160108	200	160012	200	0	160012	80001	0	80000	80100
160204	80037	240103	80101	160002	0	100	160008	300	880041	160108	200	160012	200	0	160012	80001	0	80000	80100
160204	80037	240103	80101	160002	0	100	160008	300	880041	160108	200	160012	200	0	160012	80001	0	80000	80100
160204	80037	240103	80101	160002	0	100	160008	300	880041	160108	200	160012	200	0	160012	80001	0	80000	80100
160204	80037	240103	80101	160002	0	100	160008	300	880041	160108	200	160012	200	0	160012	80001	0	80000	80100
160204	80037	240103	80101	160002	0	100	160008	300	880041	160108	200	160012	200	0	160012	80001	0	80000	80100

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 1.0005

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)
160024	80067	240013	80011	160002	10	160008	30	880041	160018	20	160012	20	160000	80001	80000	80010
160024	80037	240011	80011	160000	10	160000	30	880290	160068	20	160068	20	160000	80001	80000	80010
160024	80037	240011	80011	160000	10	160000	30	880290	160068	20	160068	20	160000	80001	80000	80010
160024	80037	240011	80011	160000	10	160000	30	880000	160010	20	160000	20	160000	80001	80000	80010
160024	80037	240011	80011	160000	10	160000	30	880000	160010	20	160000	20	160000	80001	80000	80010
160024	80037	240011	80011	160000	10	160000	30	880000	160010	20	160000	20	160000	80001	80000	80010
160024	80037	240011	80011	160000	10	160000	30	880000	160010	20	160000	20	160000	80001	80000	80010
160024	80037	240011	80011	160000	10	160000	30	880000	160010	20	160000	20	160000	80001	80000	80010
160024	80037	240011	80011	160000	10	160000	30	880000	160010	20	160000	20	160000	80001	80000	80010
160024	80037	240011	80011	160000	10	160000	30	880000	160010	20	160000	20	160000	80001	80000	80010

FCVTZU (scalar, fixed-point, S 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