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

FRINTM (vector, 8H)

Test 1: uops

Code:

  frintm 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)03l2 tlb miss data (0b)18191e1f3f4e51schedule 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)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
10043037230000082254725100010001000398160030183037303724143289510001000100030373037111001100010373216112629100030383038303830383038
100430372300000103254725100010001000398160030183037303724143289510001000100030373037111001100000073116112629100030383038303830383038
10043037240000061254725100010001000398160030183037303724143289510001000100030373037111001100000073116112629100030383038303830383038
10043037230000061254725100010001000398160030183037303724143289510001000100030373037111001100000073116112629100030383038303830383038
100430372300012061254725100010001000398160030183037303724143289510001000100030373037111001100000073116112629100030383038303830383038
10043037240000061254725100010001000398160030183037303724143289510001000100030373037111001100000073116112629100030383038303830383038
10043037240000061254725100010001000398160030183037303724143289510001000100030373037111001100000073116112629100030383038303830383038
10043037230000061254725100010001000398160030183037303724143289510001000100030373037111001100000073116112629100030383038303830383038
10043037240000081254725100010001000398160130183037303724143289510001000100030373037111001100000073116112629100030383038303830383038
10043037240000061254725100010001000398160130183037303724143289510001000100030373037111001100000073116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  frintm 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 instruction (07)mmu table walk data (08)0918191e1f3a3f4e51schedule 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)6061696d6emap 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)ld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)a9acc2cfd0d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020430037232000000006129547251010010010000100100005004277160003001830037300372826432874510100200100002001000030037300371110201100991001001000010000002030710021631296330100001003003830038300383003830038
1020430037233000000016129547251010010010000100100006264277160003001830037300372826432874510100200100002001000030037300371110201100991001001000010000000000710011611296330100001003003830038302273003830038
10204300372320000090012629547251010010010000100100005004277160003001830037300372826432874510100200100002001000030037300371110201100991001001000010000000000710011611296330100001003003830038300383003830038
1020430037233000000006129547251010010010000100100005004277160003001830037300372826432874510100200100002001000030037300371110201100991001001000010000000000710031611296330100001003003830038300383003830038
1020430037233000000006129547251010010010000100100005004277160003001830037300372826432874510100200100002001000030037300371110201100991001001000010000000000710011611296330100001003003830038300383003830038
1020430037232000000006129547251010010010000100100005004277160003001830037300372826432874510100200100002001000030037300371110201100991001001000010000000000710011611296330100001003003830038300383003830038
10204300372320000000044129547251010010010000100100005004277160003001830037300372826432874510100200100002001000030037300371110201100991001001000010000000000710011611296330100001003003830038300383003830038
1020430037233000003006129547251010010010000100100005004277160003001830037300372826432874510100200100002001000030037300371110201100991001001000010000000000710011611296330100001003003830038300383003830038
1020430037233000000006329547251012512510000125100006264277160003001830037300372826432874510100200100002001000030037300371110201100991001001000010000000000714035211296330100001003003830038300383003830038
1020430037233000000006129547251010010010000100100005004277160003001830037300372826432874510125200100002001000030037300371110201100991001001000010000000000710011621296330100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03mmu table walk data (08)l2 tlb miss data (0b)1e3f4e51schedule 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)9fst unit uop (a7)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002430037233000612954725100101010000101000050427716003001803003730037282863287671001020100002010000300373003711100211091010100001000156402162229629010000103003830038300383003830038
100243003723300061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100006402162229629010000103003830038300383003830038
100243003723200061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100006402169229629010000103003830038300383003830038
100243003723200061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100006402162229629010000103003830038300383003830038
100243003723300061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100006402162229629010000103003830038300383003830038
100243003723200061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100006402162229629010000103003830038300383003830038
100243003723300661295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100006402162229629010000103003830038300383003830038
100243003722500061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100006402162229629010000103003830038300383003830038
100243003722500061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100006402162229629010000103003830038300383003830038
100243003722500061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100006402162229629010000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  frintm v0.8h, v8.8h
  frintm v1.8h, v8.8h
  frintm v2.8h, v8.8h
  frintm v3.8h, v8.8h
  frintm v4.8h, v8.8h
  frintm v5.8h, v8.8h
  frintm v6.8h, v8.8h
  frintm 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)03mmu table walk data (08)l2 tlb miss instruction (0a)l2 tlb miss data (0b)18191e1f3a3f51schedule 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)ld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)acc2branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420059155000000003025801081008000810080020500640132020020200392003999776999080120200800322008003220039200391180201100991001008000010000000123011151189160020036800001002004020040200402004020040
80204200391560100000030258010810080008100800205006401321200202003920039997769990801202008003220080032200392003911802011009910010080000100000000011151180160020036800001002004020040200402004020040
80204200391550000000030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000000011151180160020036800001002004020040200402004020040
8020420039155000000003025801081008000810080020500640132020020200392003999776999080120200800322008003220039200391180201100991001008000010000001102011151180160020036800001002004020040200402004020040
80204200391550000000030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000000011151180160020036800001002004020040200402004020040
802042003915500000120018725801081008000810080020500640132020020200392003999776999080120200800322008003220039200391180201100991001008000010000000189011151180160020036800001002004020040200402004020040
8020420039155000000003025801081008000810080020500640132020020200392003999776999080120200800322008003220039200391180201100991001008000010000000111011151180160020036800001002004020040200402004020040
802042003915500000000582580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000000099011151180160020036800001002004020040200402004020040
802042003915500000000302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000000066011151180160020036800001002004020040200402004020040
80204200391550000000030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000003011151180160020036800001002004020040200402004020040

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)09181e3a3f51schedule 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)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242005015500000402580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100005020616742003680000102004020040200402004020040
8002420039156000120402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100005020616672003680000102004020040200402004020040
800242003915500000402580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100005020316432003680000102004020040200402004020040
800242003915600000402580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100005020716442003680000102004020040200402004020040
800242003915500000402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100005020716442003680000102009220091200402004020040
800242008915600000402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100005020516432003680000102004020040200402004020040
800242003915500000402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100005020816742003680000102004020040200402004020040
800242003916100000402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100005020416342003680000102004020040200402004020040
800242003915500000402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100005020416342003680000102004020040200402004020040
800242003915500000822580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100005020731462003680000102004020040200402004020040