Icestorm: FCCMPE (scalar, S) measurements

Code:

  fccmpe s0, s1, #0, lt

Initialization

  mov x0, 1
  mov x1, 2
  mov x2, 3
  mov x3, 4

(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)
1004	2033	1001	1	1000	1000	24769	1000	1000	3000	1
1004	2033	1001	1	1000	1000	24769	1000	1000	3000	1
1004	2033	1001	1	1000	1000	24769	1000	1000	3000	1
1004	2033	1001	1	1000	1000	24769	1000	1000	3000	1
1004	2033	1001	1	1000	1000	24769	1000	1000	3000	1
1004	2033	1001	1	1000	1000	24769	1000	1000	3000	1
1004	2033	1001	1	1000	1000	24769	1000	1000	3000	1
1004	2033	1001	1	1000	1000	24769	1000	1000	3000	1
1004	2033	1001	1	1000	1000	24769	1000	1000	3000	1
1004	2033	1001	1	1000	1000	24769	1000	1000	3000	1

Test 2: Latency 3->1

Chain cycles: 2

Code:

  fccmpe s0, s1, #0, lt
  fcsel d0, d2, d3, eq

Initialization

  mov x0, 1
  mov x1, 2
  mov x2, 3
  mov x3, 4

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code, minus 2 chain cycles): 2.0033

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)
20204	40033	20101	101	20000	100	20000	300	1019248	20100	200	20006	200	60012	1	10000	100
20204	40033	20101	101	20000	100	20000	300	1019248	20100	200	20004	200	60012	1	10000	100
20204	40033	20101	101	20000	100	20000	300	1019248	20100	200	20004	200	60012	1	10000	100
20204	40033	20101	101	20000	100	20000	300	1019248	20100	200	20004	200	60012	1	10000	100
20204	40033	20101	101	20000	100	20000	300	1019248	20100	200	20004	200	60012	1	10000	100
20204	40033	20101	101	20000	100	20000	300	1019248	20100	200	20004	200	60012	1	10000	100
20204	40033	20101	101	20000	100	20000	300	1019248	20100	200	20004	200	60012	1	10000	100
20204	40033	20101	101	20000	100	20000	300	1019248	20100	200	20004	200	60012	1	10000	100
20204	40033	20101	101	20000	100	20000	300	1019248	20100	200	20004	200	60012	1	10000	100
20204	40033	20101	101	20000	100	20000	300	1019248	20100	200	20004	200	60012	1	10000	100

1000 unrolls and 10 iterations

Result (median cycles for code, minus 2 chain cycles): 2.0033

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)
20024	40033	20011	11	20000	10	20000	30	1019248	20010	20	20000	20	60000	1	10000	10
20024	40033	20011	11	20000	10	20000	30	1019248	20010	20	20000	20	60000	1	10000	10
20024	40033	20011	11	20000	10	20000	30	1019248	20010	20	20000	20	60000	1	10000	10
20024	40033	20011	11	20000	10	20000	30	1019248	20010	20	20000	20	60000	1	10000	10
20024	40033	20011	11	20000	10	20000	30	1019248	20010	20	20000	20	60000	1	10000	10
20024	40033	20011	11	20000	10	20000	30	1019248	20010	20	20000	20	60000	1	10000	10
20024	40033	20011	11	20000	10	20000	30	1019248	20010	20	20000	20	60000	1	10000	10
20024	40033	20011	11	20000	10	20000	30	1019248	20010	20	20000	20	60000	1	10000	10
20025	40066	20019	11	20008	10	20034	30	1019248	20010	20	20000	20	60000	1	10000	10
20024	40033	20011	11	20000	10	20000	30	1019248	20010	20	20000	20	60000	1	10000	10

Test 3: Latency 3->2

Chain cycles: 2

Code:

  fccmpe s0, s1, #0, lt
  fcsel d1, d2, d3, eq

Initialization

  mov x0, 1
  mov x1, 2
  mov x2, 3
  mov x3, 4

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code, minus 2 chain cycles): 2.0033

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)	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)
20204	40033	20101	101	20000	0	100	20000	300	1019248	20100	200	20006	200	60018	1	10000	100
20204	40033	20101	101	20000	0	100	20000	300	1019248	20100	200	20004	200	60012	1	10000	100
20204	40703	20268	112	20156	0	111	20468	309	1026680	20607	204	20584	200	60012	1	10000	100
20204	40033	20101	101	20000	0	100	20000	300	1019248	20100	200	20004	200	60012	1	10000	100
20204	40033	20101	101	20000	0	100	20000	300	1019248	20100	200	20004	200	60012	1	10000	100
20204	40033	20101	101	20000	0	100	20000	300	1019248	20100	200	20004	200	60012	1	10000	100
20204	40033	20101	101	20000	0	100	20000	300	1019248	20100	200	20004	200	60012	1	10000	100
20204	40033	20101	101	20000	0	100	20000	300	1019248	20100	200	20004	200	60012	1	10000	100
20204	40033	20101	101	20000	0	100	20000	300	1019248	20100	200	20004	200	60012	1	10000	100
20204	40033	20101	101	20000	0	100	20000	300	1019248	20100	200	20004	200	60012	1	10000	100

1000 unrolls and 10 iterations

Result (median cycles for code, minus 2 chain cycles): 2.0033

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)
20024	40033	20011	11	20000	10	20000	30	1019248	20010	20	20006	20	60132	1	10000	10
20024	40033	20011	11	20000	10	20000	30	1019248	20010	20	20000	20	60000	1	10000	10
20024	40033	20011	11	20000	10	20000	30	1019248	20010	20	20000	20	60000	1	10000	10
20024	40033	20011	11	20000	10	20000	30	1019248	20010	20	20000	20	60000	1	10000	10
20024	40033	20011	11	20000	10	20000	30	1019248	20010	20	20000	20	60000	1	10000	10
20024	40033	20011	11	20000	10	20000	30	1019248	20010	20	20000	20	60000	1	10000	10
20024	40033	20011	11	20000	10	20000	30	1019248	20010	20	20000	20	60000	1	10000	10
20024	40033	20011	11	20000	10	20000	30	1019248	20010	20	20000	20	60000	1	10000	10
20024	40033	20011	11	20000	10	20000	30	1019248	20010	20	20000	20	60000	1	10000	10
20024	40033	20011	11	20000	10	20000	30	1019248	20010	20	20000	20	60000	1	10000	10

Test 4: Latency 3->3

Code:

  fccmpe s0, s1, #0, lt

Initialization

  mov x0, 1
  mov x1, 2
  mov x2, 3
  mov x3, 4

(non-fused SUB/CBNZ loop)

100 unrolls and 100 iterations

Result (median cycles for code): 2.0033

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)	? int retires (ef)
10204	20033	10201	201	10000	200	10000	700	249768	10200	200	10006	200	30018	101	100
10204	20033	10201	201	10000	200	10000	700	249769	10200	200	10004	200	30012	101	100
10205	20066	10209	201	10008	200	10021	700	249769	10200	200	10004	200	30012	101	100
10204	20033	10201	201	10000	200	10000	700	249769	10200	200	10004	200	30012	101	100
10204	20033	10201	201	10000	200	10000	700	249769	10200	200	10004	200	30012	101	100
10204	20033	10201	201	10000	200	10000	700	249769	10200	200	10004	200	30012	101	100
10204	20033	10201	201	10000	200	10000	700	249769	10200	200	10004	200	30012	101	100
10204	20033	10201	201	10000	200	10000	700	249769	10200	200	10004	200	30012	101	100
10204	20033	10201	201	10000	200	10000	700	249769	10200	200	10004	200	30012	101	100
10204	20033	10201	201	10000	200	10000	700	249769	10200	200	10004	200	30012	101	100

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0033

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)	? int retires (ef)
10024	20033	10021	21	10000	20	10000	70	249768	10020	20	10006	20	30000	11	10
10024	20033	10021	21	10000	20	10000	70	249769	10020	20	10000	20	30000	11	10
10024	20033	10021	21	10000	20	10000	70	249769	10020	20	10000	20	30000	11	10
10024	20033	10021	21	10000	20	10000	70	249769	10020	20	10000	20	30000	11	10
10024	20033	10021	21	10000	20	10000	70	249769	10020	20	10000	20	30000	11	10
10024	20033	10021	21	10000	20	10000	70	249767	10020	20	10004	20	30000	11	10
10024	20033	10021	21	10000	20	10000	70	249769	10020	20	10000	20	30000	11	10
10024	20033	10021	21	10000	20	10000	70	249769	10020	20	10000	20	30000	11	10
10024	20033	10021	21	10000	20	10000	70	249769	10020	20	10000	20	30000	11	10
10024	20033	10021	21	10000	20	10000	70	249769	10020	20	10000	20	30000	11	10

Test 5: throughput

Count: 8

Code:

  ands xzr, xzr, xzr
  fccmpe s0, s1, #0, lt
  ands xzr, xzr, xzr
  fccmpe s0, s1, #0, lt
  ands xzr, xzr, xzr
  fccmpe s0, s1, #0, lt
  ands xzr, xzr, xzr
  fccmpe s0, s1, #0, lt
  ands xzr, xzr, xzr
  fccmpe s0, s1, #0, lt
  ands xzr, xzr, xzr
  fccmpe s0, s1, #0, lt
  ands xzr, xzr, xzr
  fccmpe s0, s1, #0, lt
  ands xzr, xzr, xzr
  fccmpe s0, s1, #0, lt

Initialization

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

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 1.0736

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)	? int retires (ef)
160204	84967	160151	80128	80023	80127	80026	240321	558365	160114	80207	80007	200	240018	80008	100
160204	83954	160111	80108	80003	80107	80006	240321	560045	160114	80207	80007	200	240018	80008	100
160204	85886	160107	80105	80002	80106	80005	240318	560031	160111	80206	80006	200	240018	80005	100
160204	84120	160149	80127	80022	80126	80025	240318	560031	160111	80206	80006	200	240018	80005	100
160204	85886	160107	80105	80002	80106	80005	240378	476629	160151	80226	80025	200	240018	80008	100
160204	85886	160107	80105	80002	80106	80005	240318	560031	160111	80206	80006	200	240018	80005	100
160204	85886	160107	80105	80002	80106	80005	240378	554232	160150	80226	80024	200	240018	80005	100
160204	85886	160107	80105	80002	80106	80005	240318	560031	160111	80206	80006	200	240018	80005	100
160204	85886	160107	80105	80002	80106	80005	240318	560031	160111	80206	80006	200	240018	80005	100
160204	85886	160107	80105	80002	80106	80005	240318	560031	160111	80206	80006	200	240018	80005	100

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 1.0483

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)	? int retires (ef)
160024	85650	160018	80016	80002	80015	80005	240045	551883	160020	80025	80005	20	240000	80001	10
160024	85575	160011	80011	80000	80010	80000	240030	476425	160010	80020	80000	20	240000	80001	10
160024	83862	160011	80011	80000	80010	80000	240030	476427	160010	80020	80000	20	240000	80001	10
160024	83862	160011	80011	80000	80010	80000	240030	476427	160010	80020	80000	20	240000	80001	10
160024	83862	160011	80011	80000	80010	80000	240030	476429	160010	80020	80000	20	240000	80001	10
160024	83865	160011	80011	80000	80010	80000	240030	476429	160010	80020	80000	20	240000	80001	10
160024	83865	160011	80011	80000	80010	80000	240030	476429	160010	80020	80000	20	240000	80001	10
160024	83863	160011	80011	80000	80010	80000	240030	476429	160010	80020	80000	20	240000	80001	10
160024	83863	160011	80011	80000	80010	80000	240030	476428	160010	80020	80000	20	240000	80001	10
160024	83863	160011	80011	80000	80010	80000	240030	476429	160010	80020	80000	20	240000	80001	10

FCCMPE (scalar, S)

Test 1: uops

1000 unrolls and 1 iteration

Test 2: Latency 3->1

100 unrolls and 100 iterations

1000 unrolls and 10 iterations

Test 3: Latency 3->2

100 unrolls and 100 iterations

1000 unrolls and 10 iterations

Test 4: Latency 3->3

100 unrolls and 100 iterations

1000 unrolls and 10 iterations

Test 5: throughput

100 unrolls and 100 iterations

1000 unrolls and 10 iterations