Apple Microarchitecture Research by Dougall Johnson

M1/A14 P-core (Firestorm): Overview | Base Instructions | SIMD and FP Instructions
M1/A14 E-core (Icestorm):  Overview | Base Instructions | SIMD and FP Instructions

TBL (single register table, 16B)

Test 1: uops

Code:

  tbl v0.16b, { v0.16b }, v1.16b
  movi v0.16b, 1
  movi v1.16b, 2

(no loop instructions)

1000 unrolls and 1 iteration

Retires: 1.000

Issues: 1.000

Integer unit issues: 0.000

Load/store unit issues: 0.000

SIMD/FP unit issues: 1.000

retire uop (01)cycle (02)031e3f4e51schedule uop (52)schedule simd uop (54)dispatch simd uop (57)ldst uops in schedulers (5b)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map simd uop (7e)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst simd alu (9a)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
10042037150611687251000100010002646801201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
10042037150611687251000100010002646801201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
10042037150611687251000100010002646801201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
10042037160611687251000100010002646801201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
10042037150611687251000100010002646801201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
10042037150611687251000100010002646801201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
10042037150611687251000100010002646801201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
100420371512611687251000100010002646801201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
10042037159611687251000100010002646801201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
10042037150611687251000100010002646801201820372037157231895100010002000203720371110011000073116111787100020382038203820382038

Test 2: Latency 1->2

Code:

  tbl v0.16b, { v0.16b }, v1.16b
  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03l2 tlb miss data (0b)18191e1f3f4e51schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd alu (9a)9fl1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715000090611968725101001001000010010000500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010000407101161119791100001002003820038200382003820038
102042003715000000611968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010000007101161119791100001002003820038200382003820038
102042003715000000611968725101001001000010010304500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010010007101161119791100001002003820038200382003820038
102042003715000000611968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010000007101161119791100001002003820038200382003820038
102042003715000000611968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010000007101161119791100001002003820038200382003820038
102042003715000000761968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010001007101161119791100001002003820038200382003820038
102042003715000000611968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010000107101161119791100001002003820038200382003820038
102042003715000000611966525101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010000107101161119791100001002003820038200382003820038
1020420037150000001561968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010000007101161119791100001002003820038200382003820038
102042003715010000611968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010000007101161119791100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03mmu table walk data (08)0918191e1f3f4e51schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)60696d6emap stall dispatch (70)simd prf full (72)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd alu (9a)9fl1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024200371500000006119687251001010100001010000502847680120018200372003718444031876710010201000020200002003720037111002110910101000010000006402162219785010000102003820038200382003820038
10024200371500000006119687251001010100001010000502847680120018200372003718444031876710010201000020200002003720037111002110910101000010000389506402162219785010000102003820038200382003820038
10024200371500000006119687251001010100001010000502847680120018200372003718444731876710010201000020200002003720037111002110910101000010000006402162219785010000102003820084200382003820038
10024200371500000008219687251001010100001010000502847680120018200372003718444031876710010201000020200002003720037111002110910101000010000006402162219785010000102003820038200382003820038
1002420037150000018886119687251001010100001010000502847680120018200372003718444031876710010201000020200002003720037111002110910101000010000006402162219785010000102003820038200382003820038
100242003715000000025119687251001010100001010000502847680120018200372003718444031876710010201000020200002003720037111002110910101000010000006402162219785010000102003820038200382003820038
10024200371500000006119687251001010100001010000502847680120018200372003718444031876710010201000020200002003720037111002110910101000010000026402162219785010000102003820038200382003820229
10024200371500000301046119687251001010100001010000502847680120018200372003718444031882410164201000020200002003720037111002110910101000010201006402162219785010000102003820038200382003820038
10024200371501000006119687251001010100241010000502847680120018200372003718444031876710010201000020200002003720037111002110910101000010020006402162219785010000102003820038200382003820038
10024200371500000006119687251001010100001010000502847680120018200372003718444031876710010201000020200002003720037111002110910101000010000006402162219785010000102003820038200382003820038

Test 3: Latency 1->3

Code:

  tbl v0.16b, { v1.16b }, v0.16b
  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)030918191e1f3f4e51schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd alu (9a)9fld unit uop (a6)l1d cache writeback (a8)acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204200371500000061196872510100100100001001000050028476800200182003720037184296187411010020010008200200162003720037111020110099100100100001000101117170160019802100001002003820038200382003820038
10204200371500000061196872510100100100001001000050028476800200182003720037184296187411010020010008200200162003720037111020110099100100100001000201117180160019801100001002003820038200382003820038
10204200371500000061196872510100100100001001000050028476800200182003720037184297187401010020010008200200162003720037111020110099100100100001000091117180160019801100001002003820038200382003820038
102042003715000000611968725101001001000010010000500284768002001820037200371842971874110100200100082002001620037200371110201100991001001000010003301117180160019802100001002003820038200382003820038
10204200371500000061196652510100100100001001000050028476800200182003720037184223187611010020010000200200002003720037111020110099100100100001000100007101161119791100001002003820038200382003820038
10204200371500000061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000000007101161119791100001002003820038200382003820038
102042003715000000251196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000100007101161119791100001002003820038200382003820038
10204200371500000061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000000007101161119791100001002003820038200382003820038
10204200371500000061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000000007101161119791100001002003820038200382003820038
10204200371500000061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000100007101161119791100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03mmu table walk instruction (07)mmu table walk data (08)l2 tlb miss instruction (0a)l2 tlb miss data (0b)18191e1f3a3f4e51schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd alu (9a)9fl1d tlb access (a0)ld unit uop (a6)l1d cache writeback (a8)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002420037149000000002661968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010002006441016101219785010000102003820038200382003820038
1002420037150000000002661968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000006441016101019785010000102003820038200382003820038
1002420037150000000002661968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000006448168819785010000102003820038200382003820038
10024200371500000000026619687251001010100001010000502847680120018200372003718444318767100102010000202000020037200371110021109101010000100010064451651019785010000102003820038200382003820038
1002420037150000000002661968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000006441016101019785010000102003820038200382003820038
100242003715000000000266196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000000644121681019785010000102003820038200382003820038
1002420037150000000002661968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000006441016121219785010000102003820038200382003820038
10024200371500000000027311968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000006441016101019785010000102003820038200382003820038
1002420037150000000002661968725100101010048101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010001006441216121219785010000102003820038200382003820038
100242003715000000000266196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000000644101651019785010000102003820038200382003820038

Test 4: throughput

Count: 8

Code:

  tbl v0.16b, { v8.16b }, v9.16b
  tbl v1.16b, { v8.16b }, v9.16b
  tbl v2.16b, { v8.16b }, v9.16b
  tbl v3.16b, { v8.16b }, v9.16b
  tbl v4.16b, { v8.16b }, v9.16b
  tbl v5.16b, { v8.16b }, v9.16b
  tbl v6.16b, { v8.16b }, v9.16b
  tbl v7.16b, { v8.16b }, v9.16b
  movi v8.16b, 9
  movi v9.16b, 10

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.2505

retire uop (01)cycle (02)03mmu table walk data (08)l2 tlb miss data (0b)18191e1f3f51schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd alu (9a)9fl1d tlb access (a0)l1d tlb miss (a1)st unit uop (a7)l1d cache writeback (a8)acc2cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200571500000004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000000900511021611200350800001002003920039200392003920039
80204200381500000004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000000000511011611200350800001002003920039200392003920039
80204200381500000006025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000000000513411611200350800001002003920039200392003920039
802042003815000000042025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000000000511011611200350800001002003920039200392003920039
80204200381500000004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000000000511011611200350800001002003920039200392003920039
80204200381500000006825801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000000000511011611200350800001002003920039200392003920039
80204200381500000004025801001278000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000003000511011611200350800001002003920039200392003920039
80204200381500000004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000000000511011611200350800001002003920039200392003920039
80204200381500000004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000000000511011611200350800001002003920039200392003920039
80204200381500000004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000004000511011611200350800001002003920039200392003920039

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.2505

retire uop (01)cycle (02)03mmu table walk data (08)09l2 tlb miss instruction (0a)l2 tlb miss data (0b)18191e1f3f51schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)60696b6d6emap stall dispatch (70)simd prf full (72)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd alu (9a)9fl1d tlb access (a0)ld unit uop (a6)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420047150000000003925800101080000108000050640000020019020038200389996031001880010208000020160000200382003811800211091010800001000000050206165620035080000102003920039200392003920039
8002420038150000000003925800101080000108000050640000020019020038200389996031001880010208000020160000200382003811800211091010800001000000050205165520035080000102003920039200392003920039
8002420038150000000003925800101080000108000050640000020019020038200389996031001880010208000020160000200382003811800211091010800001000000050206167520035080000102003920039200392003920039
8002420038150000000003925800101080000108000050640000020019020038200389996031001880010208000020160000200382003811800211091010800001000000050205167720035080000102003920039200392003920039
8002420038150000000003925800101080000108000050640000020019020038200389996031001880010208000020160000200382003811800211091010800001000000050207166520035080000102003920039200392003920039
80024200381501000553528111914180807148055613805815564461202009802039320289100550241009880599208039020161160202922019271800211091010800001022422815251236776520075380000102029220343203442014020347
80024203441520020667955281706137805421280000108000050640000020019020038200389996031001880010208000020160000200382003811800211091010800001000003250727546620155080000102018820089201902003920191
80024201911510101646782648825800101080000108000072640000020019020089200389996031001880108208000020160000200382017811800211091010800001000003050205165720035080000102003920039203392039320442
80024201921610000003016525800101080000108000050640000020058020038200389996031001880010208000020160000200382003811800211091010800001000000050205166520035080000102003920039200392003920039
8002420038150000000003925800101080000108000050640000020019020038200389996031001880010208000020160000200382003811800211091010800001000000050206167620035080000102003920039200392003920039