Icestorm: CMN (uxtb, 32-bit) measurements

Code:

  cmn w0, w1, uxtb

Initialization

  mov x0, 1
  mov x1, 2

(no loop instructions)

1000 unrolls and 1 iteration

Retires: 1.000

Issues: 2.000

Integer unit issues: 2.001

Load/store unit issues: 0.000

SIMD/FP unit issues: 0.000

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

retire uop (01)	cycle (02)	schedule uop (52)	schedule int uop (53)	dispatch int uop (56)	int uops in schedulers (59)	dispatch uop (78)	map int uop (7c)	map int uop inputs (7f)	? int output thing (e9)
1004	698	2001	2001	1000	14678	1000	1000	2000	2001
1004	698	2001	2001	1000	14678	1000	1000	2000	2001
1004	698	2001	2001	1000	14678	1000	1000	2000	2001
1004	698	2001	2001	1000	14678	1000	1000	2000	2001
1004	698	2001	2001	1000	14678	1000	1000	2000	2001
1004	698	2001	2001	1000	14678	1000	1000	2000	2001
1004	698	2001	2001	1000	14678	1000	1000	2000	2001
1004	698	2001	2001	1000	14678	1000	1000	2000	2001
1004	698	2001	2001	1000	14678	1000	1000	2000	2001
1004	698	2001	2001	1000	14678	1000	1000	2000	2001

Test 2: Latency 3->1

Chain cycles: 1

Code:

  cmn w0, w1, uxtb
  cset x0, cc

Initialization

  mov x0, 1
  mov x1, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code, minus 1 chain cycle): 2.0030

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

retire uop (01)	cycle (02)	schedule uop (52)	schedule int uop (53)	dispatch int uop (56)	int uops in schedulers (59)	dispatch uop (78)	map int uop (7c)	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)
20204	30030	30101	30101	20105	789231	20105	20210	30215	0	0	30001	0	0	10100
20204	30030	30101	30101	20105	789369	20105	20212	30218	0	0	30001	0	0	10100
20204	30030	30101	30101	20105	789369	20105	20212	30218	0	0	30001	0	0	10100
20204	30030	30101	30101	20105	789369	20105	20212	30218	0	0	30001	0	0	10100
20204	30030	30101	30101	20105	789369	20105	20212	30218	0	0	30001	0	0	10100
20204	30030	30101	30101	20105	789369	20105	20212	30218	0	0	30001	0	0	10100
20204	30030	30101	30101	20105	789369	20105	20212	30218	0	0	30001	0	0	10100
20204	30030	30101	30101	20105	789369	20105	20212	30218	0	0	30001	0	0	10100
20204	30030	30101	30101	20105	789369	20105	20212	30218	0	0	30001	0	0	10100
20204	30030	30101	30101	20105	789369	20105	20212	30218	0	0	30001	0	0	10100

1000 unrolls and 10 iterations

Result (median cycles for code, minus 1 chain cycle): 2.0030

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

retire uop (01)	cycle (02)	schedule uop (52)	schedule int uop (53)	dispatch int uop (56)	int uops in schedulers (59)	dispatch uop (78)	map int uop (7c)	map int uop inputs (7f)	? int output thing (e9)	? int retires (ef)
20024	30030	30011	30011	20016	789401	20015	20030	30020	30001	10010
20024	30030	30011	30011	20010	789438	20010	20020	30020	30001	10010
20024	30030	30011	30011	20010	789438	20010	20020	30020	30001	10010
20024	30030	30011	30011	20010	789438	20010	20020	30020	30001	10010
20024	30030	30011	30011	20010	789804	20051	20076	30104	30015	10010
20024	30030	30011	30011	20015	789360	20010	20020	30020	30001	10010
20024	30030	30011	30011	20010	789438	20010	20020	30020	30001	10010
20024	30030	30011	30011	20010	789438	20010	20020	30020	30001	10010
20024	30030	30011	30011	20010	789438	20010	20020	30020	30001	10010
20024	30030	30011	30011	20010	789438	20010	20020	30020	30001	10010

Test 3: Latency 3->2

Chain cycles: 1

Code:

  cmn w0, w1, uxtb
  cset x1, cc

Initialization

  mov x0, 1
  mov x1, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code, minus 1 chain cycle): 2.0030

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

retire uop (01)	cycle (02)	schedule uop (52)	schedule int uop (53)	dispatch int uop (56)	int uops in schedulers (59)	dispatch uop (78)	map int uop (7c)	map int uop inputs (7f)	? int output thing (e9)	? int retires (ef)
20204	30030	30101	30101	20106	789247	20108	20214	30218	30001	10100
20204	30030	30101	30101	20105	789369	20105	20212	30218	30001	10100
20204	30030	30101	30101	20106	789231	20105	20210	30218	30001	10100
20204	30030	30101	30101	20105	789369	20105	20212	30218	30001	10100
20204	30030	30101	30101	20105	789369	20105	20212	30218	30001	10100
20204	30030	30101	30101	20105	789369	20105	20212	30218	30001	10100
20204	30030	30101	30101	20105	789369	20105	20212	30218	30001	10100
20204	30030	30101	30101	20105	789369	20105	20212	30218	30001	10100
20204	30030	30101	30101	20105	789369	20105	20212	30218	30001	10100
20204	30030	30101	30101	20105	789369	20105	20212	30218	30001	10100

1000 unrolls and 10 iterations

Result (median cycles for code, minus 1 chain cycle): 2.0030

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

retire uop (01)	cycle (02)	schedule uop (52)	schedule int uop (53)	dispatch int uop (56)	int uops in schedulers (59)	dispatch uop (78)	map int uop (7c)	map int uop inputs (7f)	? int output thing (e9)	? int retires (ef)
20024	30030	30011	30011	20015	789438	20010	20020	30020	30001	10010
20024	30030	30011	30011	20010	789438	20010	20020	30020	30001	10010
20024	30030	30011	30011	20010	789438	20010	20020	30020	30001	10010
20024	30030	30011	30011	20010	789438	20010	20020	30020	30001	10010
20024	30030	30011	30011	20010	789438	20010	20020	30020	30001	10010
20024	30030	30011	30011	20010	789438	20010	20020	30020	30001	10010
20024	30030	30011	30011	20010	789438	20010	20020	30020	30001	10010
20024	30030	30011	30011	20010	789438	20010	20020	30020	30001	10010
20024	30030	30011	30011	20010	789459	20015	20032	30020	30001	10010
20024	30030	30011	30011	20010	789438	20010	20020	30020	30001	10010

Test 4: throughput

Count: 8

Code:

  cmn w0, w1, uxtb
  cmn w0, w1, uxtb
  cmn w0, w1, uxtb
  cmn w0, w1, uxtb
  cmn w0, w1, uxtb
  cmn w0, w1, uxtb
  cmn w0, w1, uxtb
  cmn w0, w1, uxtb

Initialization

  mov x0, 1
  mov x1, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.6675

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

retire uop (01)	cycle (02)	schedule uop (52)	schedule int uop (53)	dispatch int uop (56)	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)	? int output thing (e9)	? ldst retires (ed)	? simd retires (ee)	? int retires (ef)
80204	53404	160117	160117	80127	0	1177601	0	0	80130	80230	0	0	160252	0	160016	0	0	100
80204	53402	160114	160114	80123	0	1177603	0	0	80123	80224	0	0	160248	0	160014	0	0	100
80204	53402	160114	160114	80123	0	1177627	0	0	80123	80224	0	0	160248	0	160014	0	0	100
80204	53402	160114	160114	80123	0	1177607	0	0	80123	80224	0	0	160248	0	160014	0	0	100
80204	53402	160114	160114	80123	0	1177619	0	0	80123	80224	0	0	160248	0	160014	0	0	100
80204	53402	160114	160114	80123	0	1177603	0	0	80123	80224	0	0	160248	0	160014	0	0	100
80204	53402	160114	160114	80123	0	1177627	0	0	80123	80224	0	0	160248	0	160014	0	0	100
80204	53402	160114	160114	80123	0	1177603	0	0	80123	80224	0	0	160248	0	160014	0	0	100
80204	53402	160114	160114	80123	0	1177627	0	0	80123	80224	0	0	160328	0	160062	0	0	100
80204	53402	160114	160114	80123	0	1177623	0	0	80123	80224	0	0	160248	0	160014	0	0	100

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.6671

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

retire uop (01)	cycle (02)	schedule uop (52)	schedule int uop (53)	dispatch int uop (56)	int uops in schedulers (59)	dispatch uop (78)	map int uop (7c)	map int uop inputs (7f)	? int output thing (e9)	? int retires (ef)
80024	53405	160039	160039	80047	1171972	80020	80020	160020	160011	10
80024	53371	160021	160021	80020	1171999	80020	80020	160020	160011	10
80024	53371	160021	160021	80020	1171999	80020	80020	160020	160011	10
80024	53371	160021	160021	80020	1171999	80020	80020	160020	160011	10
80024	53371	160021	160021	80020	1171999	80020	80020	160020	160011	10
80024	53371	160021	160021	80020	1171999	80020	80020	160020	160011	10
80024	53371	160021	160021	80020	1171999	80020	80020	160158	160074	10
80024	53371	160021	160021	80020	1171999	80020	80020	160020	160011	10
80024	53371	160021	160021	80020	1171999	80020	80020	160020	160011	10
80024	53371	160021	160021	80020	1171999	80020	80020	160020	160011	10

CMN (uxtb, 32-bit)

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: throughput

100 unrolls and 100 iterations

1000 unrolls and 10 iterations