Icestorm: STRB (register, sxtw) measurements

Code:

  strb w0, [x6, w7, sxtw]

Initialization

  mov x0, 0
  mov x7, 8

(no loop instructions)

1000 unrolls and 1 iteration

Retires: 1.000

Issues: 1.000

Integer unit issues: 0.001

Load/store unit issues: 1.000

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)	schedule ldst uop (55)	dispatch ldst uop (58)	simd uops in schedulers (5a)	dispatch uop (78)	map ldst uop (7d)	map ldst uop inputs (80)	? int output thing (e9)	? ldst retires (ed)
1005	1147	1019	1	1018	1000	17007	1000	1000	3000	1	1000
1004	1037	1001	1	1000	1000	16847	1000	1000	3000	1	1000
1004	1037	1001	1	1000	1000	16847	1000	1000	3000	1	1000
1004	1037	1001	1	1000	1000	16847	1000	1000	3000	1	1000
1004	1038	1001	1	1000	1000	16865	1000	1000	3000	1	1000
1004	1037	1001	1	1000	1000	16847	1000	1000	3000	1	1000
1004	1038	1001	1	1000	1000	16847	1000	1000	3000	1	1000
1004	1039	1001	1	1000	1000	16883	1000	1000	3000	1	1000
1004	1039	1001	1	1000	1000	16901	1000	1000	3000	1	1000
1004	1042	1001	1	1000	1000	16883	1000	1000	3000	1	1000

Count: 8

Code:

  strb w0, [x6, w7, sxtw]
  strb w0, [x6, w7, sxtw]
  strb w0, [x6, w7, sxtw]
  strb w0, [x6, w7, sxtw]
  strb w0, [x6, w7, sxtw]
  strb w0, [x6, w7, sxtw]
  strb w0, [x6, w7, sxtw]
  strb w0, [x6, w7, sxtw]

Initialization

  mov x7, 8

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 1.0006

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

retire uop (01)	cycle (02)	schedule uop (52)	schedule int uop (53)	schedule ldst uop (55)	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)	map ldst uop inputs (80)	? int output thing (e9)	? ldst retires (ed)	? int retires (ef)
80205	80153	80119	101	80018	100	80001	300	1359974	80101	200	80008	200	240024	1	80000	100
80204	80047	80101	101	80000	100	80001	300	1360046	80101	200	80008	200	240024	1	80000	100
80204	80047	80101	101	80000	100	80001	300	1360046	80101	200	80008	200	240024	1	80000	100
80204	80047	80101	101	80000	100	80001	300	1360046	80101	200	80008	200	240024	1	80000	100
80204	80047	80101	101	80000	100	80001	300	1360046	80101	200	80008	200	240024	1	80000	100
80204	80047	80101	101	80000	100	80036	300	1360163	80136	200	80051	200	240024	1	80000	100
80204	80047	80101	101	80000	100	80001	300	1360046	80101	200	80008	200	240024	1	80000	100
80204	80047	80101	101	80000	100	80001	300	1360046	80101	200	80008	200	240024	1	80000	100
80204	80047	80101	101	80000	100	80001	300	1360046	80101	200	80008	200	240024	1	80000	100
80204	80047	80101	101	80000	100	80001	300	1360046	80101	200	80008	200	240024	1	80000	100

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 ldst uop (55)	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)	map ldst uop inputs (80)	? int output thing (e9)	? ldst retires (ed)	? int retires (ef)
80025	80145	80029	11	80018	10	80000	30	1359811	80010	20	80000	20	240000	1	80000	10
80024	80037	80011	11	80000	10	80000	30	1359847	80010	20	80000	20	240000	1	80000	10
80024	80037	80011	11	80000	10	80000	30	1359847	80010	20	80000	20	240000	1	80000	10
80024	80037	80011	11	80000	10	80000	30	1359847	80010	20	80000	20	240000	1	80000	10
80024	80037	80011	11	80000	10	80000	30	1359847	80010	20	80000	20	240000	1	80000	10
80024	80037	80011	11	80000	10	80000	30	1359847	80010	20	80000	20	240000	1	80000	10
80024	80037	80011	11	80000	10	80000	30	1359847	80010	20	80000	20	240000	1	80000	10
80024	80037	80011	11	80000	10	80000	30	1359847	80010	20	80000	20	240000	1	80000	10
80024	80037	80011	11	80000	10	80000	30	1359847	80010	20	80000	20	240000	1	80000	10
80025	80065	80028	11	80017	10	80000	30	1359847	80010	20	80000	20	240000	1	80000	10

STRB (register, sxtw)

Test 1: uops

1000 unrolls and 1 iteration

Test 2: throughput

100 unrolls and 100 iterations

1000 unrolls and 10 iterations