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

FRINTP (vector, 2D)

Test 1: uops

Code:

  frintp v0.2d, v0.2d
  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)696d6emap 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)st unit uop (a7)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
1004303723066125472510001000100039816030183037303724143289510001000100030373037111001100000073216222629100030383038303830383038
1004303724006125472510001000100039816030183037303724143289510001000100030373037111001100000073216222699100030383038303830383038
1004303723006125472510001000100039816030183037303724143289510001000100030373037111001100000073216222629100030383038303830383038
1004303723006125472510001000100039816030183037303724143289510001000100030373037111001100000073216222629100030383038303830383038
1004303723006125472510001000100039816030183037303724143289510001000100030373037111001100000073216222629100030383038303830383038
1004303723006125472510001000100039816030183037303724143289510001000100030373037111001100000073216222629100030383038303830383038
100430372302110325292510001000100039816030183037303724143289510001000100030373037111001100000073216222629100030383038303830383038
1004303724006125472510001000100039816030183037303724143289510001000100030373037111001100000073216222629100030383038303830383038
10043037240126125472510001000100039816030183037303724143289510001000100030373037111001100000073216222629100030383038303830383038
1004303723006125472510001000100039816030183037303724143289510001000100030373037111001100000073216222629100030383038303830383038

Test 2: Latency 1->2

Code:

  frintp v0.2d, v0.2d
  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)l1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)ec? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204300372330000000061295472510100100100001001000050042771601300183003730037282643287451010020010000200100003003730037111020110099100100100001000000030710116112963300100001003003830038300383003830038
10204300372330000000061295472510100100100001001015057142771601300183003730037282643287451010020010000200100003003730037111020110099100100100001000000000710116312963300100001003003830038300383003830038
102043003723200000000265295472510100100100001001000050042771601300183003730037282743287451010020010000200100003003730037111020110099100100100001000000002710124322963300100001003008530038300383003830325
10204300372331000000061295472510100100100001001000050042771601300183003730037282643287451010020010000200100003003730037111020110099100100100001000000000710116112963300100001003003830038300383003830038
1020430037233100003988061295472510100100100001001000050042771601300183003730037282643287451010020010000200100003003730037111020110099100100100001000000000710116112963330100001003003830038300383003830038
102043003723300000000231295472510100100100001001000050042771601300183003730037282643287451010020010000200100003003730037111020110099100100100001000001060710116122963300100001003003830038300383003830038
10204300372330000000061295472510100100100001001000050042771601300183003730037282643287451010020010000200100003008430037111020110099100100100001000000000710116112963300100001003003830038300383003830038
1020430037233000000006129547251010010010000100100005224277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000106071011611296330135100001003003830038300383003830038
102043003723300000000840295472510100100100001001000050042771600300183003730037282643287451010020010000200100003003730037111020110099100100100001000000000710116112963300100001003003830038300383003830038
10204300372330000000061295472510100100100001001000050042771601300183003730037282643287451010020010000202100003003730037111020110099100100100001002000000710116112963300100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)0318191e1f3f4e51schedule 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 miss (a1)ld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)acc2branch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024300372250045061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000000640216222962910000103003830038300383003830038
1002430037224000061295472510010131000010100005042771601300180300373003728285328767100102010000201000030037300371110021109101010000100000000640216222962910000103003830038300383003830038
1002430037225000061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000000640216222962910000103003830038300383003830038
1002430037224000061295472510010101000010100005042771601300180300373003728286328767100102010000201000030037300371110021109101010000100000000640216222962910000103003830038300383003830038
1002430037225000061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000000640216222962910000103003830038300383003830038
1002430037225000061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000000640217222962910000103003830038300383003830038
10024300372250000147295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000000640216222962910000103003830038300383003830038
1002430037225000061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000000640216222962910000103003830038300383003830038
1002430037225000061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000000640216222962910000103003830038300383003830038
1002430037225000061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000000640216222962910000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  frintp v0.2d, v8.2d
  frintp v1.2d, v8.2d
  frintp v2.2d, v8.2d
  frintp v3.2d, v8.2d
  frintp v4.2d, v8.2d
  frintp v5.2d, v8.2d
  frintp v6.2d, v8.2d
  frintp v7.2d, v8.2d
  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 instruction (07)mmu table walk data (08)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)a9acc2branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)fetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042008915500000120010332580108100800081008002050064013212002020092200399977699908012020080032202801432030920729518020110099100100800001000001001201115118116020036800001002015420040201552004020040
8020420039166010007588074618010810080008100800205006401320200202009220039997769990801202008003220080032200392003911802011009910010080000100220024301115118016020036800001002004020040200402004020040
80204200391500000000030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000000301115118016020036800001002004020040200402004020040
802042003915000000120030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000010001115118016020036800001002004020040200402004020145
80204200391560100000095258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000010301115118016020077800001002004020040200962004020040
8020420039150000002640030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100200000301115118016020036800001002004020040200402004020040
80204200391500000012001088258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000010301115118116020036800001002004020040200402004020040
802042003915500000120051258010810080112100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000000301115119016020036800001002004020040200402004020040
8020420039150010001200469258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000010001115118039020036800001002004020040200402004020040
80204200391600000012001284258010810080008100800205006401320200202003920039997769990801202008003220080032200392003921802011009910010080000100000010601115118016020036800001002004020091200402009420093

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)031e3a3f51schedule 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 cache writeback (a8)accfd2d5map dispatch bubble (d6)ddfetch restart (de)e0ec? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200511550040258001010800001080000506400001200202003920039999603100198001020800002080000200392003911800211091010800001000502001161120036080000102004020040200402004020040
80024200391553040258001010800001080000506400001200202003920039999603100198001020800002080000200392003911800211091010800001010502001161120036080000102004020040200402004020040
80024200391550040258001010800001080000506400001200202003920039999603100198001020800002080000200392003911800211091010800001000502001161120036080000102004020040200402004020040
8002420039156004025800101080000108000050640000020020200392003999960310019800102080000208000020039200391180021109101080000100455020101161120036080000102004020040200402004020040
80024200391550040258001010800001080000506400000200202003920039999603100198001020800002080000200392003911800211091010800001000502001161120036080000102004020040200402004020040
80024200391550040258001010800001080000506400000200202003920039999603100198001020800002080000200392003911800211091010800001000502001161120036080000102004020040200402004020040
80024200391550040258001010800001080000506400000200202003920039999603100198001020800002080000200392003911800211091010800001000502001161120036080000102004020040200402004020040
80024200391550040258001010800001080000506400000200202003920039999603100198001020800002080000200392003911800211091010800001000502001161120036080000102004020040200402004020040
80024200391550163258001010800001080000506400001200202003920039999603100198001020800002080000200392003911800211091010800001000502001161120036080000102004020040200402004020040
800242003915600196258001010800001080000506400000200202003920039999603100198001020800002080000200392003911800211091010800001000502001161120036080000102004020040200402004020040