Icestorm: CMP (register, lsr, 32-bit) measurements

Code:

  cmp w0, w1, lsr #17

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	14668	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:

  cmp w0, w1, lsr #17
  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)	dispatch ldst uop (58)	int uops in schedulers (59)	simd uops in schedulers (5a)	dispatch uop (78)	map int uop (7c)	map ldst uop (7d)	map int uop inputs (7f)	? int output thing (e9)	? int retires (ef)
20204	30030	30101	30101	20105	0	789311	0	20105	20210	0	30218	30001	10100
20204	30030	30101	30101	20105	0	789369	0	20105	20212	0	30218	30001	10100
20204	30030	30101	30101	20105	0	789369	0	20105	20212	0	30218	30001	10100
20204	30030	30101	30101	20105	0	789369	0	20105	20212	0	30218	30001	10100
20204	30030	30101	30101	20105	0	789369	0	20105	20212	0	30218	30001	10100
20204	30030	30101	30101	20105	0	789369	0	20105	20212	0	30218	30001	10100
20204	30030	30101	30101	20105	0	789369	0	20105	20212	0	30218	30001	10100
20204	30030	30101	30101	20105	0	789369	0	20105	20212	0	30218	30001	10100
20204	30030	30101	30101	20105	0	789369	0	20105	20212	0	30218	30001	10100
20204	30030	30101	30101	20105	0	789369	0	20105	20212	0	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	789288	20015	20032	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	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:

  cmp w0, w1, lsr #17
  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	30178	30164	30164	20219	789247	20108	20214	30215	30001	10100
20204	30030	30101	30101	20105	789369	20105	20212	30218	30001	10100
20204	30030	30101	30101	20105	789369	20105	20212	30215	30001	10100
20204	30030	30101	30101	20105	789369	20105	20212	30218	30001	10100
20205	30060	30115	30115	20140	789290	20105	20210	30218	30001	10100
20204	30030	30101	30101	20108	789369	20105	20212	30218	30001	10100
20204	30030	30101	30101	20105	789287	20105	20210	30218	30001	10100
20204	30030	30101	30101	20105	790341	20181	20296	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	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	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

Test 4: throughput

Count: 8

Code:

  cmp w0, w1, lsr #17
  cmp w0, w1, lsr #17
  cmp w0, w1, lsr #17
  cmp w0, w1, lsr #17
  cmp w0, w1, lsr #17
  cmp w0, w1, lsr #17
  cmp w0, w1, lsr #17
  cmp w0, w1, lsr #17

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)	dispatch uop (78)	map int uop (7c)	map ldst uop (7d)	map int uop inputs (7f)	? int output thing (e9)	? int retires (ef)
80204	53415	160116	160116	80125	0	1177589	0	80125	80226	0	160252	160016	100
80204	53402	160114	160114	80123	0	1177627	0	80123	80224	0	160248	160014	100
80204	53402	160114	160114	80123	0	1177651	0	80123	80224	0	160248	160014	100
80205	53434	160159	160159	80166	0	1177627	0	80123	80224	0	160248	160014	100
80204	53402	160114	160114	80123	0	1177655	0	80123	80224	0	160248	160014	100
80204	53402	160114	160114	80123	0	1177623	0	80123	80224	0	160248	160014	100
80204	53402	160114	160114	80123	0	1177647	0	80123	80224	0	160248	160014	100
80204	53402	160114	160114	80123	0	1177627	0	80123	80224	0	160248	160014	100
80204	53402	160114	160114	80123	0	1177655	0	80123	80224	0	160248	160014	100
80204	53402	160114	160114	80123	0	1177619	0	80123	80224	0	160248	160014	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	53401	160039	160039	80047	1170032	80020	80020	160020	160011	10
80024	53371	160021	160021	80020	1170032	80020	80020	160020	160011	10
80024	53371	160021	160021	80020	1170032	80020	80020	160020	160011	10
80024	53371	160021	160021	80020	1170032	80020	80020	160020	160011	10
80024	53371	160021	160021	80020	1170032	80020	80020	160020	160011	10
80024	53371	160021	160021	80020	1170032	80020	80020	160020	160011	10
80024	53371	160021	160021	80020	1184658	80083	80084	160020	160011	10
80024	53371	160021	160021	80020	1170032	80020	80020	160020	160011	10
80024	53371	160021	160021	80020	1170032	80020	80020	160020	160011	10
80024	53371	160021	160021	80020	1170032	80020	80020	160020	160011	10

CMP (register, lsr, 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