Icestorm: STP (signed offset, Q) measurements

Code:

  stp q0, q1, [x6, #0x10]
  nop ; nop ; nop ; nop ; nop ; nop ; nop

Initialization

  mov x0, 0

(no loop instructions)

1000 unrolls and 1 iteration

Retires (minus 7 nops): 2.000

Issues: 2.000

Integer unit issues: 0.001

Load/store unit issues: 2.000

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)
9005	4145	2019	1	2018	2000	8534	2000	2000	4000	1	2000
9004	2413	2001	1	2000	2000	9124	2000	2000	4000	1	2000
9004	2504	2033	1	2032	2000	8534	2000	2000	4000	1	2000
9004	2301	2001	1	2000	2000	8534	2000	2000	4000	1	2000
9004	2301	2001	1	2000	2000	8534	2000	2000	4000	1	2000
9004	2301	2001	1	2000	2000	8534	2000	2000	4000	1	2000
9004	2301	2001	1	2000	2000	8534	2000	2000	4000	1	2000
9004	2301	2001	1	2000	2000	8534	2000	2000	4000	1	2000
9004	2301	2001	1	2000	2000	8534	2000	2000	4000	1	2000
9004	2301	2001	1	2000	2000	9240	2000	2000	4000	1	2000

Count: 8

Code:

  stp q0, q1, [x6, #0x10]
  stp q0, q1, [x6, #0x10]
  stp q0, q1, [x6, #0x10]
  stp q0, q1, [x6, #0x10]
  stp q0, q1, [x6, #0x10]
  stp q0, q1, [x6, #0x10]
  stp q0, q1, [x6, #0x10]
  stp q0, q1, [x6, #0x10]

Initialization

  mov x7, x6
  mov x8, x6
  mov x9, x6
  mov x10, x6
  mov x11, x6
  mov x12, x6
  mov x13, x6

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 2.0006

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)
160205	160152	160119	101	160018	100	160001	300	2719974	160101	200	160008	200	320016	1	160000	100
160204	160047	160101	101	160000	100	160001	300	2720046	160101	200	160008	200	320016	1	160000	100
160204	160047	160101	101	160000	100	160001	300	2720046	160101	200	160008	200	320016	1	160000	100
160204	160047	160101	101	160000	100	160001	300	2720046	160101	200	160008	200	320016	1	160000	100
160204	160047	160101	101	160000	100	160001	300	2720046	160101	200	160008	200	320016	1	160000	100
160204	160047	160101	101	160000	100	160001	300	2720046	160101	200	160008	200	320016	1	160000	100
160204	160047	160101	101	160000	100	160001	300	2720046	160101	200	160008	200	320016	1	160000	100
160204	160047	160101	101	160000	100	160001	300	2720046	160101	200	160008	200	320016	1	160000	100
160204	160047	160101	101	160000	100	160001	300	2720046	160101	200	160008	200	320016	1	160000	100
160204	160047	160101	101	160000	100	160001	300	2720046	160101	200	160008	200	320016	1	160000	100

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 2.0006

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)
160025	160163	160029	11	160018	10	160001	30	2720010	160011	20	160008	20	320000	1	160000	10
160024	160047	160011	11	160000	10	160000	30	2720043	160010	20	160000	20	320000	1	160000	10
160024	160047	160011	11	160000	10	160000	30	2720043	160010	20	160000	20	320000	1	160000	10
160024	160047	160011	11	160000	10	160000	30	2720043	160010	20	160000	20	320000	1	160000	10
160024	160047	160011	11	160000	10	160000	30	2720043	160010	20	160000	20	320000	1	160000	10
160025	160075	160028	11	160017	10	160000	30	2720043	160010	20	160000	20	320000	1	160000	10
160024	160047	160011	11	160000	10	160000	30	2720043	160010	20	160000	20	320000	1	160000	10
160024	160047	160011	11	160000	10	160000	30	2720043	160010	20	160000	20	320000	1	160000	10
160024	160047	160011	11	160000	10	160000	30	2720043	160010	20	160000	20	320000	1	160000	10
160024	160047	160011	11	160000	10	160034	30	2720156	160044	20	160048	20	320000	1	160000	10

STP (signed offset, Q)

Test 1: uops

1000 unrolls and 1 iteration

Test 2: throughput

100 unrolls and 100 iterations

1000 unrolls and 10 iterations