Icestorm: BFI (64-bit) measurements

Code:

  bfi x0, x1, #3, #7

Initialization

  mov x0, 1

(no loop instructions)

1000 unrolls and 1 iteration

Retires: 1.000

Issues: 1.000

Integer unit issues: 1.001

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)	? int retires (ef)
1004	1030	1001	1001	1000	3000	1000	1000	2000	1001	1000
1004	1030	1001	1001	1000	3000	1000	1000	2000	1001	1000
1004	1030	1001	1001	1000	3000	1000	1000	2000	1001	1000
1004	1030	1001	1001	1000	3000	1000	1000	2000	1001	1000
1004	1030	1001	1001	1000	3000	1000	1000	2000	1001	1000
1004	1030	1001	1001	1000	3000	1000	1000	2000	1001	1000
1004	1030	1001	1001	1000	3000	1000	1000	2000	1001	1000
1004	1030	1001	1001	1000	3000	1000	1000	2000	1001	1000
1004	1030	1001	1001	1000	3000	1000	1000	2000	1001	1000
1004	1030	1001	1001	1000	3000	1000	1000	2000	1001	1000

Test 2: Latency 1->1

Code:

  bfi x0, x1, #3, #7

Initialization

  mov x0, 1

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 1.0034

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)
10204	10054	10104	10104	10105	30315	10105	10212	20224	10004	10100
10204	10034	10104	10104	10105	30315	10105	10212	20224	10004	10100
10204	10034	10104	10104	10105	30315	10105	10212	20224	10004	10100
10204	10034	10104	10104	10105	30315	10105	10212	20224	10004	10100
10204	10034	10104	10104	10105	30315	10105	10212	20224	10004	10100
10204	10034	10104	10104	10105	30315	10105	10212	20224	10004	10100
10204	10034	10104	10104	10105	30315	10105	10212	20224	10004	10100
10204	10034	10104	10104	10105	30315	10105	10212	20224	10004	10100
10204	10034	10104	10104	10105	30315	10105	10212	20224	10004	10100
10204	10034	10104	10104	10105	30315	10105	10212	20224	10004	10100

1000 unrolls and 10 iterations

Result (median cycles for code): 1.0030

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)
10024	10057	10025	10025	10026	30078	10026	10032	20020	10011	10010
10024	10030	10021	10021	10020	30060	10020	10020	20020	10011	10010
10024	10030	10021	10021	10020	30060	10020	10020	20020	10011	10010
10024	10030	10021	10021	10020	30060	10020	10020	20020	10011	10010
10024	10030	10021	10021	10020	30060	10020	10020	20020	10011	10010
10024	10030	10021	10021	10020	30060	10020	10020	20020	10011	10010
10024	10030	10021	10021	10020	30060	10020	10020	20020	10011	10010
10024	10030	10021	10021	10020	30060	10020	10020	20020	10011	10010
10024	10030	10021	10021	10020	30060	10020	10020	20020	10011	10010
10024	10030	10021	10021	10020	30060	10020	10020	20020	10011	10010

Test 3: Latency 1->2

Chain cycles: 1

Code:

  add x1, x0, x0
  mov x0, 0
  bfi x0, x1, #3, #7

Initialization

  mov x0, 1

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code, minus 1 chain cycle): 1.0030

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)
30204	20030	20201	20201	20207	380010	20207	20213	40226	20101	30100
30204	20030	20201	20201	20208	380324	20208	20213	40226	20101	30100
30204	20030	20201	20201	20208	380324	20208	20213	40226	20101	30100
30204	20030	20201	20201	20208	380324	20208	20213	40226	20101	30100
30204	20030	20201	20201	20208	380324	20208	20213	40306	20115	30100
30204	20030	20201	20201	20208	380324	20208	20213	40226	20101	30100
30204	20030	20201	20201	20208	380324	20208	20213	40226	20101	30100
30204	20030	20201	20201	20208	380324	20208	20213	40226	20101	30100
30204	20030	20201	20201	20208	380324	20208	20213	40226	20101	30100
30204	20030	20201	20201	20208	380324	20208	20213	40226	20101	30100

1000 unrolls and 10 iterations

Result (median cycles for code, minus 1 chain cycle): 1.0030

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)
30024	20030	20011	20011	20016	379708	20015	20031	40020	20001	30010
30024	20030	20011	20011	20010	379776	20010	20020	40020	20001	30010
30024	20030	20011	20011	20010	379776	20010	20020	40020	20001	30010
30024	20030	20011	20011	20010	379776	20010	20020	40020	20001	30010
30024	20030	20011	20011	20010	379776	20010	20020	40020	20001	30010
30024	20030	20011	20011	20010	380004	20047	20060	40020	20001	30010
30024	20030	20011	20011	20010	379776	20010	20020	40020	20001	30010
30024	20030	20011	20011	20010	379776	20010	20020	40020	20001	30010
30024	20030	20011	20011	20010	379776	20010	20020	40020	20001	30010
30024	20030	20011	20011	20010	379776	20010	20020	40020	20001	30010

Test 4: throughput

Count: 8

Code:

  bfi x0, x8, #3, #7
  bfi x1, x8, #3, #7
  bfi x2, x8, #3, #7
  bfi x3, x8, #3, #7
  bfi x4, x8, #3, #7
  bfi x5, x8, #3, #7
  bfi x6, x8, #3, #7
  bfi x7, x8, #3, #7

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 1.0004

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)
80204	80034	80104	80104	80105	240315	80105	80210	160220	80004	80100
80204	80044	80104	80104	80105	240315	80105	80212	160224	80004	80100
80204	80034	80104	80104	80105	240315	80105	80212	160224	80004	80100
80204	80034	80104	80104	80105	240315	80105	80212	160224	80004	80100
80204	80034	80104	80104	80105	240315	80105	80212	160224	80004	80100
80204	80034	80104	80104	80105	240315	80105	80212	160224	80004	80100
80204	80034	80104	80104	80105	240315	80105	80212	160224	80004	80100
80204	80034	80104	80104	80105	240315	80105	80212	160224	80004	80100
80204	80034	80104	80104	80105	240315	80105	80212	160224	80004	80100
80204	80034	80104	80104	80105	240315	80105	80212	160224	80004	80100

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 1.0004

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)
80025	80076	80039	80039	80043	240078	80026	80032	160020	80011	80010
80024	80030	80021	80021	80020	240060	80020	80020	160020	80011	80010
80024	80030	80021	80021	80020	240060	80020	80020	160020	80011	80010
80025	80065	80039	80039	80043	240060	80020	80020	160020	80011	80010
80024	80030	80021	80021	80020	240060	80020	80020	160020	80011	80010
80024	80030	80021	80021	80020	240060	80020	80020	160020	80011	80010
80024	80030	80021	80021	80020	240060	80020	80020	160020	80011	80010
80024	80030	80021	80021	80020	240060	80020	80020	160020	80011	80010
80024	80030	80021	80021	80020	240060	80020	80020	160020	80011	80010
80024	80030	80021	80021	80020	240060	80020	80020	160020	80011	80010

BFI (64-bit)

Test 1: uops

1000 unrolls and 1 iteration

Test 2: Latency 1->1

100 unrolls and 100 iterations

1000 unrolls and 10 iterations

Test 3: Latency 1->2

100 unrolls and 100 iterations

1000 unrolls and 10 iterations

Test 4: throughput

100 unrolls and 100 iterations

1000 unrolls and 10 iterations