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

FRINTA (vector, 8H)

Test 1: uops

Code:

  frinta v0.8h, v0.8h
  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)03191e3f4e51schedule 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)l1d cache writeback (a8)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100430372401261254749100010001000398160130183037303724147289510001000112830373037111001100000273216112629100030383038303830863038
100430842513361254725100010001000398160030543073303724143290710001139100030373037111001100000073116112629100030383085303830853086
100430372403061253825100010001000398160130183037303724143289510001000100030373037111001100000073116112629100030383038303830383038
100430372400103254725100010001000398160130183037303724143289510001000100030373037111001100000073116112629100030383038303830383038
100430372403061254725100010001000398160030183037303724143289510001000100030373037111001100003073116112629100030383038303830383038
10043037230061254725100010001000398160030183037303724143289510001000100030373037111001100000073116112629100030383038303830383038
10043037230061254725100010001000398160030183037303724143289510001000100030373037111001100000073116112629100030383038303830383038
10043037230061254725100010001000398160030183037303724143289510001000100030373037111001100010073116112629100030383038303830383038
100430372302161254725100010001000398160130183037303724143289510001000100030373037111001100003073116112629100030383038303830383038
100430372303061254725100010001000398160030183037303724143289510001000100030373037111001100000073116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  frinta v0.8h, v0.8h
  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03mmu table walk data (08)09l2 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)st unit uop (a7)l1d cache writeback (a8)a9acc2branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020430037233000000006129547251010010010000100100005004277160030018300833008628264328745101002001000020010000300373003711102011009910010010000100000000000071011611296330100001003003830038300383003830038
102043003723300000000107229547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100000000000071011611296330100001003003830038300383003830038
1020430037233000000006129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100000020000071011611296330100001003003830038300383003830038
102043003723300000000918295472510100100100001001000050042771600300183003730037282643287451010020010000200100003003730037111020110099100100100001000012000000710116212969132100001003036830371303623037130274
10204303213041001110120344005852294721891016414410032122112007244285272030342304663017928281312889011345232113302311165530370303261011020110099100100100001002000211210200084611611296330100001003003830038300383003830038
10204300372320000000023329547251010010010000100100005004277160030018300373003728266328745101002001000020010000300373003711102011009910010010000100000000000071011611296330100001003003830038300383003830038
1020430037233000009006129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100000000000071011611296330100001003003830038300383003830038
1020430037232000000006129547251010010010000100100005004277160030061300373003728268328745101002001000020010000300373003711102011009910010010000100000006000071011611296330100001003003830038300383003830038
1020430037233000000008929547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003721102011009910010010000100000000000077611621296330100001003003830038300383003830038
10204300372410000000021829547251010010010000100100005004277160130018300373003728264328763101002001000020010000300373003711102011009910010010000100000000400071011611296330100001003003830038300863003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03181e3f4e51schedule 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)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 cache writeback (a8)accdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024300372330061295472510010101000010100005042771601300180300373003728286328767100102010000201000030037300371110021109101010000100000640316332962910000103003830038300383003830038
10024300372330061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000640316332962910000103003830038300383003830038
100243003723301261295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000640316332962910000103003830038300383003830038
10024300372330061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000661316332962910000103003830038300383003830038
10024300372330061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000640316332962910000103003830038300383003830038
10024300372330061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000640316332962910000103003830038300383003830038
100243003723300103295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000640316332962910000103003830038300383003830038
10024300372320061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000640316332962910000103003830038300383003830038
100243003723211561295472510010101000010100005042771600300180300373003728286328785100102010329201000030037300371110021109101010000100000640316332962910000103003830038300383003830038
10024300372330061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000640316332962910000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  frinta v0.8h, v8.8h
  frinta v1.8h, v8.8h
  frinta v2.8h, v8.8h
  frinta v3.8h, v8.8h
  frinta v4.8h, v8.8h
  frinta v5.8h, v8.8h
  frinta v6.8h, v8.8h
  frinta v7.8h, v8.8h
  movi v8.16b, 9

(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)0309191e3f51schedule 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 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
8020420058155009302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
80204200391550001732580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000011151180161020036800001002004020040200402004020040
8020420039155000302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
8020420039155000302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
80204200391550001182580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
80204200391550012302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
8020420039156000302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
8020420039155000722580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001002011151180160020036800001002004020040200402004020089
802042003915500666002580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
8020420039155000302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151180160120036800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03mmu table walk instruction (07)l2 tlb miss instruction (0a)191e3a3f51schedule 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)5f60696d6emap 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 cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242005115511002742258001010800001080000506400000020020200392003999963100198001020800002080000200392003911800211091010800001020005024201616142003680000102004020040200402004020040
800242003915511002969258001010800001080000506400000120020200392003999963100198001020800002080000200392003911800211091010800001000005024161617172003680000102004020040200402004020040
80024200391551100268325800101080000108000050640000012002020039200399996310019800102080000208000020039200391180021109101080000100000502417161692003680000102004020040200402004020040
800242003916111002246258001010800001080000506400000120020200392003999963100198001020800002080000200392003911800211091010800001010005024161614162003680000102004020040200402004020040
800242003915611002382258001010800001080000506400000020020201942003999963100198001020800002080000200392003911800211091010800001030005024151615162003680000102004020040200402004020040
800242003915511028529125800101080000108000050640000002002020039200399996310019800102080000208000020039200391180021109101080000100000502414168132008880000102004020251200402004020040
800242003915011002194258001010800001080000506400000120020200392003999963100198001020800002080000200392003911800211091010800001010005024181619162003680000102004020040200402004020040
800242003915011002110258001010800001080000506400000120020200392003999963100198001020800002080000200392003911800211091010800001000005024161617162003680000102004020040200402004020040
8002420039150110021522580010108000010800005064000001200202003920039999631001980010208000020800002003920039118002110910108000010104760502416161582003680000102004020040200402004020040
8002420039150110027025800101080000108000050640000002002020039200399996310019800102080000208000020039200391180021109101080000100000502415161592003680000102004020040200402004020040