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, 4S)

Test 1: uops

Code:

  frintm v0.4s, v0.4s
  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)l1d cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
1004303724061254725100010001000398160030183037303724143289510001000100030373037111001100000073116212629100030383038303830383038
1004303724061254725100010001000398160030183037303724143289510001000100030373037111001100002073116212629100030383038303830383038
1004303723061254725100010001000398160030183037303724143289510001000100030373037111001100000073116212629100030383038303830383038
1004303724061254725100010001000398160030183037303724143289510001000100030373037111001100000073116212629100030383038303830383038
1004303724061254725100010001000398160130183037303724143289510001000100030373037111001100010073116212629100030383038303830383038
1004303724061254725100010001000398160030183037303724143289510001000100030373037111001100000073116212629100030383038303830383038
10043037231284254725100010001000398160130183037303724143289510001000100030373037111001100000073116212629100030383038303830383038
1004303724061254725100010001000398160130183037303724143289510001000100030373037111001100000073116212629100030383038303830383038
10043037243157254725100010001000398160030183037303724143289510001000100030373037111001100000073116212629100030383038303830383038
1004303723061254725100010001000398160130183037303724143289510001000100030373037111001100000073116212629100030383038303830383038

Test 2: Latency 1->2

Code:

  frintm v0.4s, v0.4s
  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)l2 tlb miss data (0b)0e18191e1f3a3f4e51schedule 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)a9acc2cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)eb? simd retires (ee)? int retires (ef)f5f6f7f8fd
102043003723200000000612954725101001001000010010000500427716003001830037300372826432876210100200100002001000030037300371110201100991001001000010000000000710216112963300100001003003830038300383003830038
1020430037233000000002512954725101001001000010010000500427716003001830037300372826432874510100200100002001000030037300371110201100991001001000010000000000710116112963300100001003003830038300383003830038
102043003723200000000612954725101001001000010010000500427716003001830037300372826432874510100200100002001000030037300371110201100991001001000010000000000710116112963300100001003003830038300383003830038
102043003723300000000612954725101001001000010010000500427716003001830037300372826432874510100200100002001000030037300371110201100991001001000010000000000710116112963300100001003003830038300383003830038
102043003723300000000612954725101001001000010010000500427716003001830037300372826432874510100200100002001000030037300371110201100991001001000010000000000710116112963300100001003003830038300383003830038
102043003723200000000612954725101001001000010010000500427716003001830037300372826432874510100200100002001000030037300371110201100991001001000010000000000710116112963300100001003003830038300383003830038
1020430037233000000003462954725101001001000010010000500427716003001830037300372826432874510100200100002001000030037300371110201100991001001000010000000000710116112963300100001003003830038300383003830038
1020430037233000001200612954725101001001000010010000500427716003001830037300372826432874510100200100002001000030037300371110201100991001001000010000000000710116112963300100001003003830038300383003830038
102043003723300000000612954725101001001000010010000500427716003001830037300372826432874510100200100002001000030037300371110201100991001001000010000000000710116112963300100001003003830038300383003830038
102043003723300000000612954725101001001000010010000500427716003001830037300372826432874510100200100002001000030037300371110201100991001001000010000000000710126112963300100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)0318191e3f4e51schedule 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)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024300372250006129547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000640216222962910000103003830038300383003830038
10024300372250006129547251001010100001010000504277160030018300373003728286328767100102010000201000030037300371110021109101010000100000640216222962910000103003830038300383003830038
10024300372250006129547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000640216222962910000103003830038300383003830038
10024300372250006129547251001010100001010000504277160130018300373003728286328767100102010000201054330037300371110021109101010000100000640216222962910000103003830038300383003830038
1002430037225000394129547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000640216222962910000103003830038300383003830038
10024300372240006129547251001012100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000640216222962910000103003830038300383003830038
10024300372250008229547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000640216222962910000103003830038300383003830038
100243003722500061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000120640216222962910000103003830038300383003830038
10024300372250006129547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000640216222962910000103003830038300383003830038
10024300372250006129547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000640216222962910000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  frintm v0.4s, v8.4s
  frintm v1.4s, v8.4s
  frintm v2.4s, v8.4s
  frintm v3.4s, v8.4s
  frintm v4.4s, v8.4s
  frintm v5.4s, v8.4s
  frintm v6.4s, v8.4s
  frintm v7.4s, v8.4s
  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 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)ld unit uop (a6)l1d cache writeback (a8)a9acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)dbddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420058155000018058258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000001115118016000200360800001002004020040200402004020040
8020420039156000018030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000001115118016000200360800001002004020040200402004020040
802042003915500000030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000031115118016000200360800001002004020040200402004020040
80204200391550000219030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100001001115118016000200360800001002004020040200402004020040
802042003915601006030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000001115118016000200360800001002004020040200402004020040
80204200391550000477072258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000001115118016010200360800001002004020040200402004020040
8020420039155000033030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000001115118016000200360800001002004020040200402004020040
80204200391560000384030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000001115118016000200360800001002004020040200402004020040
802042003915500000030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000001115118016511200460800001002004020040200402004020040
80204200391560000156030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000001115118016000200360800001002004020040200402004020040

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)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)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 miss (a1)ld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)accfd0d2d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242003915600003630040258001010800001080000506400001020020200392003999963100198001020800002080000200392009011800211091010800001000000502000181616620036080000102004020040200402004020040
800242003915600009006325800101080000108000050640000102002020039200399996310019800102080000208000020039200391180021109101080000100000050205161661620036080000102004020040200402010220040
800242003916100005700103258001010800001080000506400001020020200392003999963100198001020800002080000200392003911800211091010800001000113502000161651620036080000102004020040200402004020040
800242003915500003270040258001010800001080000506400000520020200392003999963100198001020800002080000200392003911800211091010800001000000502000161661620036080000102004020040200402004020040
8002420039155000000040258001010800001080000506400001020020200392003999963100198001020800002080000200392003911800211091010800001000000502053616161620036080000102004020040200402004020040
8002420039155000030600402580010108000010800005064000010200202003920039999631001980010208000020800002003920039118002110910108000010000005020001516161620036080000102004020040200402004020040
8002420039155000000040258001010800001080000506400000520020200392003999963100198001020800002080000200392003911800211091010800001000000502000161616620036080000102004020040200402004020040
80024200391550000261004025800101080000108000050640000102002020039200399996310019800102080000208000020039200391180021109101080000100000050200061661620036080000102004020040200402004020040
8002420039155000000040258001010800001080000506400001020020200392003999963100198001020800002080000200392003911800211091010800001000000502053161661620036080000102004020040200402004020040
800242003915600003004025800101080000108000050640000052002020039200399996310019800102080000208000020039200391180021109101080000100000050200061661620036080000102004020040200402004020040