Firestorm: SUB (shifted immediate, 32-bit) measurements

Code:

  sub w0, w0, #3, lsl #12

Initialization

  mov x0, 1
  mov x1, 2

(no loop instructions)

1000 unrolls and 1 iteration

Retires: 1.000

Issues: 1.000

Integer unit issues: 1.000

Load/store unit issues: 0.000

SIMD/FP unit issues: 0.000

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

retire uop (01)	cycle (02)	03	1e	3f	4d	51	schedule uop (52)	schedule int uop (53)	dispatch int uop (56)	int uops in schedulers (59)	60	6d	6e	map stall dispatch (70)	map rewind (75)	map stall (76)	dispatch uop (78)	map int uop (7c)	map int uop inputs (7f)	82	83	flush restart other nonspec (84)	85	inst all (8c)	inst int alu (97)	l1d cache writeback (a8)	ac	cf	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? int output thing (e9)	? int retires (ef)	f5	f6	f7	f8	fd
1004	1035	7	0	61	862	25	1000	1000	1000	16916	1	1035	1035	728	3	868	1000	1000	1000	1035	41	1	1	1001	1000	0	0	73	1	41	2	1	937	1000	1000	1036	1036	1036	1036	1036
1004	1035	7	3	329	862	25	1000	1000	1000	16916	1	1035	1035	728	3	868	1000	1000	1000	1035	41	1	1	1001	1000	0	0	73	2	41	1	2	937	1000	1000	1036	1036	1036	1036	1036
1004	1035	7	0	61	862	25	1000	1000	1000	16916	0	1035	1035	728	3	868	1000	1000	1000	1035	41	1	1	1001	1000	0	0	73	2	41	2	2	937	1000	1000	1036	1036	1036	1036	1036
1004	1035	8	0	61	862	25	1000	1000	1000	16916	1	1035	1035	728	3	868	1000	1000	1000	1035	41	1	1	1001	1000	0	0	73	2	41	1	2	937	1000	1000	1036	1036	1036	1036	1036
1004	1035	8	0	61	862	25	1000	1000	1000	16916	0	1035	1035	728	3	868	1000	1000	1000	1035	41	1	1	1001	1000	0	0	73	2	41	1	2	937	1000	1000	1036	1036	1036	1036	1036
1004	1035	8	0	61	862	25	1000	1000	1000	16916	1	1035	1035	728	3	868	1000	1000	1000	1035	41	1	1	1001	1000	0	0	73	1	41	2	2	937	1000	1000	1036	1036	1036	1036	1036
1004	1035	8	0	61	862	25	1000	1000	1000	16916	0	1035	1035	728	3	868	1000	1000	1000	1035	41	1	1	1001	1000	0	0	73	2	41	1	1	937	1000	1000	1036	1036	1036	1036	1036
1004	1035	8	0	61	862	25	1000	1000	1000	16916	0	1035	1035	728	3	868	1000	1000	1000	1035	41	1	1	1001	1000	0	0	73	2	41	1	2	937	1000	1000	1036	1036	1036	1036	1036
1004	1035	8	0	90	862	25	1000	1000	1000	16916	0	1035	1035	728	3	868	1000	1000	1000	1035	41	1	1	1001	1000	0	0	73	2	41	1	2	937	1000	1000	1036	1036	1036	1036	1036
1004	1035	8	0	61	862	25	1000	1000	1000	16916	1	1035	1035	728	3	868	1000	1000	1000	1035	41	1	1	1001	1000	0	0	73	2	41	2	2	937	1000	1000	1036	1036	1036	1036	1036

Test 2: Latency 1->2

Code:

  sub w0, w0, #3, lsl #12

Initialization

  mov x0, 1
  mov x1, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 1.0035

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

retire uop (01)	cycle (02)	03	1e	3f	4d	51	schedule uop (52)	schedule int uop (53)	dispatch int uop (56)	int uops in schedulers (59)	69	6a	6d	6e	map stall dispatch (70)	map rewind (75)	map stall (76)	dispatch uop (78)	map int uop (7c)	map int uop inputs (7f)	82	83	flush restart other nonspec (84)	85	inst all (8c)	inst branch (8d)	inst branch taken (90)	inst branch cond (94)	inst int alu (97)	9f	ld unit uop (a6)	l1d cache writeback (a8)	ac	cf	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? int output thing (e9)	? int retires (ef)	f5	f6	f7	f8	fd
10204	10035	76	0	61	9877	25	10100	10100	10100	88664	49	6955	10035	10035	8580	3	8722	10100	10200	10200	10035	41	1	1	10201	100	99	100	10100	100	0	0	6	710	1	37	1	1	9941	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	61	9877	25	10100	10100	10100	90723	49	6955	10035	10035	8580	3	8722	10100	10200	10200	10035	41	1	1	10201	100	99	100	10100	100	0	0	0	710	1	37	1	1	9941	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	61	9877	25	10100	10100	10100	88664	49	6955	10035	10035	8580	3	8722	10100	10200	10200	10035	41	1	1	10201	100	99	100	10100	100	0	26	0	710	1	37	1	1	9941	10000	10100	10036	10036	10036	10036	10036
10204	10035	76	0	61	9877	25	10100	10100	10100	88664	49	6955	10035	10035	8580	3	8722	10100	10200	10200	10035	41	1	1	10201	100	99	100	10100	100	0	0	3	710	1	37	1	1	9941	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	61	9877	25	10100	10100	10100	88664	49	6955	10035	10035	8580	3	8722	10100	10200	10200	10035	41	1	1	10201	100	99	100	10100	100	0	27	0	710	1	37	1	1	9941	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	61	9877	25	10100	10100	10100	88664	49	6955	10035	10035	8580	3	8722	10100	10200	10200	10035	41	1	1	10201	100	99	100	10100	100	0	0	0	710	1	37	1	1	9941	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	61	9877	25	10100	10100	10100	88664	49	7095	10035	10035	8580	3	8722	10100	10200	10200	10035	41	1	1	10201	100	99	100	10100	100	0	0	0	710	1	37	1	1	9941	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	61	9877	25	10100	10100	10100	88664	49	6955	10035	10035	8580	3	8722	10100	10200	10200	10035	41	1	1	10201	100	99	100	10100	100	0	0	0	710	1	37	1	1	9941	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	0	61	9877	25	10100	10100	10100	88664	49	6955	10035	10035	8580	3	8722	10100	10200	10200	10035	41	1	1	10201	100	99	100	10100	100	0	0	93	710	1	37	1	1	9941	10000	10100	10036	10036	10036	10036	10036
10204	10035	75	51	61	9877	25	10100	10100	10100	88664	49	6955	10035	10035	8580	3	8722	10100	10200	10200	10035	41	1	1	10201	100	99	100	10100	100	0	0	63	710	1	37	1	1	9941	10000	10100	10036	10036	10036	10036	10036

1000 unrolls and 10 iterations

Result (median cycles for code): 1.0035

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

retire uop (01)	cycle (02)	03	mmu table walk data (08)	09	l2 tlb miss data (0b)	18	19	1e	1f	3f	4d	51	schedule uop (52)	schedule int uop (53)	dispatch int uop (56)	int uops in schedulers (59)	69	6a	6b	6d	6e	map stall dispatch (70)	map rewind (75)	map stall (76)	dispatch uop (78)	map int uop (7c)	map int uop inputs (7f)	82	83	flush restart other nonspec (84)	85	inst all (8c)	inst branch (8d)	inst branch taken (90)	inst branch cond (94)	inst int alu (97)	9f	l1d tlb access (a0)	l1d tlb miss (a1)	ld unit uop (a6)	st unit uop (a7)	l1d cache writeback (a8)	a9	ac	c2	cf	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? int output thing (e9)	? int retires (ef)	f5	f6	f7	f8	fd
10024	10035	75	0	0	0	1	0	0	0	84	9863	25	10010	10010	10010	88784	49	6955	0	10035	10035	8602	3	8740	10010	10020	10020	10035	41	2	1	10021	10	9	10	10010	10	0	0	0	0	0	0	0	0	640	6	41	2	2	9940	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	0	0	0	0	36	0	61	9863	25	10010	10010	10010	88784	49	6955	0	10035	10035	8602	18	8740	10010	10367	10020	10035	41	1	1	10021	10	9	10	10010	10	0	0	0	0	0	0	0	0	640	2	41	2	2	9975	10022	10010	10036	10036	10036	10036	10082
10024	10035	75	0	0	0	0	2	30	0	755	9863	25	10010	10032	10163	88784	49	6955	0	10035	10035	8602	3	8740	10010	10020	10020	10035	41	1	1	10021	10	9	10	10010	10	0	0	0	0	1	0	0	0	640	2	41	2	2	9940	10000	10010	10036	10036	10036	10081	10036
10024	10035	75	0	0	0	0	0	0	108	61	9863	25	10010	10010	10010	88784	49	6955	0	10035	10035	8602	3	8740	10010	10020	10020	10035	41	1	1	10021	10	9	10	10010	10	4	2	0	0	0	0	0	0	640	2	41	2	2	9940	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	0	0	0	0	156	0	103	9863	25	10010	10010	10010	88784	49	6955	0	10035	10035	8602	3	8740	10010	10020	10020	10035	41	1	1	10021	10	9	10	10010	10	0	0	0	0	0	0	0	0	640	2	41	2	2	9940	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	0	0	0	0	12	0	61	9863	25	10010	10010	10010	88784	49	6955	0	10035	10035	8602	3	8740	10010	10020	10020	10035	41	1	1	10021	10	9	10	10010	10	0	0	0	0	0	0	0	0	640	2	41	2	2	9940	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	0	0	0	0	0	0	82	9863	25	10010	10010	10010	88784	49	6955	0	10035	10035	8602	3	8740	10010	10020	10020	10035	41	1	1	10021	10	9	10	10010	10	0	0	0	0	0	0	0	0	640	2	41	2	2	9940	10000	10010	10036	10036	10036	10036	10081
10024	10035	75	0	0	0	0	0	6	0	61	9863	25	10010	10010	10010	88784	49	6955	0	10035	10035	8602	3	8740	10010	10020	10020	10035	41	1	1	10021	10	9	10	10010	10	0	0	0	0	0	0	0	0	640	2	41	2	2	9940	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	0	0	0	0	0	0	61	9863	25	10010	10010	10010	88784	49	6955	0	10035	10035	8602	3	8740	10010	10020	10020	10035	41	1	1	10021	10	9	10	10010	10	0	0	0	0	0	0	0	0	640	2	41	2	2	9940	10000	10010	10036	10036	10036	10036	10036
10024	10035	75	0	0	0	0	0	0	0	61	9863	25	10010	10010	10010	88784	49	6955	0	10035	10035	8602	3	8740	10010	10020	10020	10035	41	1	1	10021	10	9	10	10010	10	4	0	0	0	0	0	0	0	640	2	41	2	2	9940	10000	10010	10036	10036	10036	10079	10036

Test 3: throughput

Count: 8

Code:

  sub w0, w8, #3, lsl #12
  sub w1, w8, #3, lsl #12
  sub w2, w8, #3, lsl #12
  sub w3, w8, #3, lsl #12
  sub w4, w8, #3, lsl #12
  sub w5, w8, #3, lsl #12
  sub w6, w8, #3, lsl #12
  sub w7, w8, #3, lsl #12

Initialization

  mov x8, 9

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.1674

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

retire uop (01)	cycle (02)	03	l1i tlb fill (04)	1e	3f	51	schedule uop (52)	schedule int uop (53)	dispatch int uop (56)	int uops in schedulers (59)	60	69	6a	6d	6e	map stall dispatch (70)	map rewind (75)	map stall (76)	dispatch uop (78)	map int uop (7c)	map int uop inputs (7f)	82	83	flush restart other nonspec (84)	85	inst all (8c)	inst branch (8d)	inst branch taken (90)	inst branch cond (94)	inst int alu (97)	9f	l1d tlb miss (a1)	l1d cache writeback (a8)	ac	branch cond mispred nonspec (c5)	branch mispred nonspec (cb)	cd	cf	d5	map dispatch bubble (d6)	fetch restart (de)	e0	? int output thing (e9)	? int retires (ef)	f5	f6	f7	f8	fd
80204	13413	100	1	0	28	27	80136	80136	80148	400710	0	49	10310	13390	13390	3326	6	3336	80148	80264	80264	13390	39	1	1	80201	100	99	100	80100	100	0	0	0	1	1	1	5119	1	16	0	13387	80036	80100	13391	13391	13391	13391	13391
80204	13390	100	0	0	28	27	80136	80136	80148	400710	0	49	10310	13390	13390	3326	6	3336	80148	80264	80264	13390	39	1	1	80201	100	99	100	80100	100	0	0	0	1	1	1	5119	0	16	0	13387	80036	80100	13391	13391	13391	13391	13391
80204	13390	100	0	3	28	27	80136	80136	80148	400710	0	49	10310	13390	13390	3326	6	3336	80148	80264	80264	13390	39	1	1	80201	100	99	100	80100	100	0	0	9	1	1	1	5119	0	16	0	13387	80036	80100	13391	13391	13391	13391	13391
80204	13390	100	0	0	28	27	80136	80136	80148	400710	0	49	10310	13390	13390	3326	6	3336	80148	80264	80264	13390	39	1	1	80201	100	99	100	80100	100	0	0	0	1	1	1	5119	0	16	0	13387	80036	80100	13391	13391	13391	13391	13391
80204	13390	100	0	0	28	27	80136	80136	80148	400710	0	49	10310	13390	13390	3326	6	3336	80148	80264	80264	13390	39	1	1	80201	100	99	100	80100	100	0	0	0	1	1	1	5119	0	16	0	13387	80036	80100	13391	13391	13391	13391	13391
80204	13390	100	0	0	28	27	80136	80136	80148	400710	0	49	10310	13390	13390	3326	6	3336	80148	80264	80264	13390	39	1	1	80201	100	99	100	80100	100	0	0	3	1	1	1	5119	0	16	0	13387	80036	80100	13391	13391	13391	13391	13391
80204	13390	101	0	0	28	27	80136	80136	80148	400710	0	49	10310	13390	13390	3326	6	3336	80148	80264	80264	13390	39	1	1	80201	100	99	100	80100	100	0	1	0	1	1	1	5119	0	16	0	13387	80036	80100	13391	13391	13391	13391	13391
80204	13390	100	0	0	28	27	80136	80136	80148	400710	0	49	10310	13390	13390	3326	6	3336	80148	80264	80264	13390	39	1	1	80201	100	99	100	80100	100	0	0	12	1	1	1	5120	0	16	0	13387	80036	80100	13391	13391	13391	13391	13391
80204	13390	101	0	0	28	27	80136	80136	80148	400710	0	49	10310	13390	13390	3326	6	3336	80148	80264	80264	13390	39	1	1	80201	100	99	100	80100	100	0	0	21	1	1	1	5119	0	16	0	13387	80036	80100	13391	13391	13391	13391	13391
80204	13390	100	0	0	28	27	80136	80136	80148	400710	0	49	10310	13390	13390	3326	6	3336	80148	80264	80264	13390	39	1	1	80201	100	99	100	80100	100	0	0	0	1	1	1	5119	0	16	0	13387	80036	80100	13391	13391	13391	13391	13391

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.1671

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

retire uop (01)	cycle (02)	03	09	l2 tlb miss data (0b)	1e	3f	51	schedule uop (52)	schedule int uop (53)	dispatch int uop (56)	int uops in schedulers (59)	60	69	6a	6b	6d	6e	map stall dispatch (70)	map rewind (75)	map stall (76)	dispatch uop (78)	map int uop (7c)	map int uop inputs (7f)	82	83	flush restart other nonspec (84)	85	inst all (8c)	inst branch (8d)	inst branch taken (90)	inst branch cond (94)	inst int alu (97)	9f	l1d cache writeback (a8)	ac	cf	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? int output thing (e9)	? int retires (ef)	f5	f6	f7	f8	fd
80024	13376	100	0	0	0	35	25	80010	80010	80010	400050	0	49	10291	0	13371	13371	3330	3	3348	80010	80020	80020	13371	39	1	1	80021	10	9	10	80010	10	0	15	5021	8	19	6	6	13368	80000	80010	13372	13372	13372	13372	13372
80024	13371	100	0	0	9	35	25	80010	80010	80010	400050	0	49	10291	0	13371	13371	3330	3	3348	80010	80020	80020	13371	39	1	1	80021	10	9	10	80010	10	0	66	5021	5	19	5	3	13368	80000	80010	13372	13372	13372	13372	13372
80024	13371	100	0	0	0	35	25	80010	80010	80010	400050	0	49	10291	0	13371	13371	3330	24	3348	80010	80020	80020	13371	39	1	1	80021	10	9	10	80010	10	0	30	5022	3	19	6	5	13368	80000	80010	13372	13372	13372	13372	13372
80024	13371	100	0	0	9	161	25	80010	80010	80010	400050	0	49	10291	0	13371	13371	3330	3	3348	80010	80020	80020	13371	39	1	1	80021	10	9	10	80010	10	0	0	5022	5	19	5	6	13368	80000	80010	13372	13372	13372	13372	13372
80024	13371	100	0	0	0	77	25	80010	80010	80010	400050	0	49	10291	0	13371	13371	3330	3	3348	80010	80020	80020	13371	39	1	1	80021	10	9	10	80010	10	0	3	5022	5	19	5	3	13368	80126	80010	13372	13372	13372	13372	13372
80024	13371	100	0	0	0	35	25	80010	80010	80010	400050	0	49	10291	0	13371	13371	3330	3	3348	80146	80020	80020	13371	39	1	1	80021	10	9	10	80010	10	0	0	5020	6	19	5	3	13368	80000	80010	13372	13372	13372	13372	13372
80024	13371	101	0	0	0	35	25	80010	80010	80010	400050	0	49	10291	0	13371	13371	3330	3	3348	80010	80020	80020	13371	39	1	1	80021	10	9	10	80010	10	0	0	5022	5	19	3	5	13368	80000	80010	13372	13372	13372	13372	13372
80024	13371	100	0	0	0	35	25	80010	80010	80010	400050	0	49	10291	0	13371	13371	3330	3	3348	80010	80020	80020	13371	39	1	1	80021	10	9	10	80010	10	0	0	5021	3	19	4	5	13368	80000	80010	13372	13372	13372	13372	13372
80024	13371	101	0	0	0	35	25	80010	80010	80010	400050	0	49	10291	0	13371	13371	3330	3	3348	80145	80020	80020	13371	39	1	1	80021	10	9	10	80010	10	0	66	5022	5	19	5	3	13368	80000	80010	13372	13372	13372	13372	13372
80024	13371	100	0	0	0	35	25	80010	80010	80010	400050	0	49	10291	0	13371	13371	3330	3	3348	80010	80020	80020	13371	39	1	1	80021	10	9	10	80010	10	0	0	5021	5	19	6	3	13368	80000	80010	13372	13372	13372	13372	13372

SUB (shifted immediate, 32-bit)

Test 1: uops

1000 unrolls and 1 iteration

Test 2: Latency 1->2

100 unrolls and 100 iterations

1000 unrolls and 10 iterations

Test 3: throughput

100 unrolls and 100 iterations

1000 unrolls and 10 iterations