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

FABD (vector, 8H)

Test 1: uops

Code:

  fabd v0.8h, v0.8h, v1.8h
  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)033f4e51schedule 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
10043037226125482510001000100039831313018303730372415328951000100020003037303711100110000073216222630100030383038303830383038
10043037236125482510081000100039831313018303730372415328951000100020003037303711100110000073216222630100030383038303830383038
10043037226125482510001000100039831313018303730372415328951000100020003037303711100110000373216222630100030383038308630383038
10043037236125482510001000100039831313018303730372415328951000100020003037303711100110000073216222630100030383038303830383038
10043037236125482510001000100039831313018303730372415328951000100020003037303711100110000073216222630100030383038303830383038
10043037226125482510001000100039831313018303730372415328951000100020003037303711100110000073216222630100030383038303830383038
10043037236125482510001000100039831313018303730372415328951000100020003037303711100110000073216222630100030383038303830383038
100430372325125482510001000100039831313018303730372415328951000100020003037303711100110000973216222630100030383038303830383038
100430372361254825100010001000398313130183037303724153289510001000200030373037111001100009073216222630100030383038303830383038
10043037226125482510001000100039831313018303730372415328951000100020003037303711100110002073216222630100030383038303830383038

Test 2: Latency 1->2

Code:

  fabd v0.8h, v0.8h, v1.8h
  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)1e1f3f4e51schedule 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020430037225000006129548251010010010000100100005004277313030018300373003728265328745101002001000020020000300373003711102011009910010010000100000007102161129634100001003003830038300383003830038
1020430037225000006129548251010010010000100100005004277313130018300373003728265328745101002001000020020000300373003711102011009910010010000100000007101161129634100001003003830038300383003830038
1020430037225000006129548251010010010000100100005004277313030018300373003728265628745101002001000020020000300373003711102011009910010010000100000007101161129634100001003003830038300383003830038
1020430037225000006129548251010010010000100100005004277313030018300373003728265328745101002001000020020000300373003711102011009910010010000100000007101161129705100001003003830038300383003830038
102043003722500000210429548251010010010000100100005004277313030018300373003728265328745101002001000020020000300373003711102011009910010010000100000007101161129634100001003003830038300383003830038
1020430037225000006129548251010010010000100100005004282669030018300373003728265328745101002001000020020000300373003711102011009910010010000100000037101161129634100001003003830038300383003830038
10204300372250000010329548251010010010000100100005004277313130018300373003728265328745101002001000020020000300373003711102011009910010010000100000007101161129634100001003003830038300383003830038
1020430037225000006129548251010010010000100100005004277313130018300373003728265328745101002001000020020000300373003711102011009910010010000100000007101161129688100001003003830038300383003830038
10204300372250002106129548251010010010000100100005004277313030018300373003728265328745107252001000020020000300373003711102011009910010010000100000037101161129634100001003003830038300383003830038
1020430037225000006129548251010010010000100100005004277313030018300373003728265328745101002001000020020000300373003711102011009910010010000100000067101161129634100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03l2 tlb miss data (0b)191e3f4e51schedule 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? simd retires (ee)? int retires (ef)f5f6f7f8fd
100243003722500061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000000640216222963010000103003830038300383003830038
10024300372250013261295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000000640216222963010000103003830038300383003830038
100243003722500061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000000640216222963010000103003830038300383003830038
100243003722510061295482510010101001610100005042773131300183003730037282873287671001020100002020000300373003711100211091010100001000060640216222963010000103003830038300383003830038
10024300372250006129548251001010100001010000504277313030018300373003728287328767100102010000202000030037300371110021109101010000100001770640216222963010000103003830038300383003830038
100243003722500061295482510010101000710100005042773131300183003730037282873287671001020100002020000300373003711100211091010100001000000640216222963010000103003830038300383003830038
100243003722500082295482510010101000010100005042773130300183008430084282873287671001020100002020000300373003711100211091010100001000000640216222963010000103003830038300383003830038
100243003722500061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000100640216222963010000103003830038300383003830038
10024300372250006129548441001010100001110000504277313030018300373003728287102876710010201000020200003003730037111002110910101000010000150640216222970210000103003830038300853008530038
100243003722401061295482510010101000010100005042773130300183003730037282873287671016020100002020000300373003711100211091010100001000027902640216222963010000103003830038300383003830038

Test 3: Latency 1->3

Code:

  fabd v0.8h, v1.8h, 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)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)l1d tlb miss (a1)ld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)a9acc2cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204300372250000000612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000000030071011611296340100001003003830038300383003830038
10204300372250000000612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000000030071011611296340100001003003830038300383003830038
10204300372250000000612954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000000030071011611296340100001003003830038300383003830038
10204300372250000000612954825101001001000010010000500427731303001830037300372826532874510100200101642002033230085300371110201100991001001000010000000060071011611296340100001003003830038300383003830038
10204300372240000000612954825101001001000010010000500427731303005430037300372826532874510100200100002002000030037300371110201100991001001000010000000090071011611296340100001003003830038300383003830038
10204300372250000000612954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000000030071011611296340100001003003830038300383003830038
102043003722500000003762954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000001090071011611296340100001003003830038300383003830038
10204300372250000000612954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000000030071011611296340100001003003830038300383003830038
10204300372240000000612954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000000030071011611296340100001003003830038300383003830038
10204300372250000000612954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000000000071011611296340100001003003830038300383003830038

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)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)l1d cache writeback (a8)acbranch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
100243003722400061295482510010101000010100005042773131300180300373003728287328767100102010000202000030037300371110021109101010000100000640216222963010000103003830038300383003830038
1002430037225000251295482510010101000010100005042773131300180300373003728287328767100102010000202000030037300371110021109101010000100100640216222963010000103003830038300383003830038
100243003722500061295482510010101000010100005042773131300180300373003728305328767100102010000202000030037300371110021109101010000100000640216222963010000103003830038300383003830038
10024300372250007262954825100101010000101000050427731313001803003730037282873287671001020100002020000300373003711100211091010100001002500640216222963010000103003830038300383003830038
10024300372250006129548251001010100001010000614277313130018030037300372828732876710010201000020200003003730037111002110910101000010001050640216222963010000103003830038300383003830038
100243003722500061295482510010101000010100005042773131300180300373003728287328767100102010000202000030037300371110021109101010000100400640216222963010000103003830038300383003830038
100243003722400061295482510010101000010100005042773131300180300373003728302328767100102010000202000030037300371110021109101010000100000640216222963010000103003830038300383003830038
100243003722500061295482510010101000010100005042773131300180300373003728287328767100102010000202000030037300371110021109101010000100100640216222963010000103003830038300383003830038
100243003722500061295482510010101000010100005042773131300180300373003728287328767100102010000202000030037300371110021109101010000100000640216222963010000103003830038300383003830038
100243003722500061295482510010101000010100005042773131300180300373003728287328767100102010000202000030037300371110021109101010000100000640216222963010000103003830038300383003830038

Test 4: throughput

Count: 8

Code:

  fabd v0.8h, v8.8h, v9.8h
  fabd v1.8h, v8.8h, v9.8h
  fabd v2.8h, v8.8h, v9.8h
  fabd v3.8h, v8.8h, v9.8h
  fabd v4.8h, v8.8h, v9.8h
  fabd v5.8h, v8.8h, v9.8h
  fabd v6.8h, v8.8h, v9.8h
  fabd v7.8h, v8.8h, v9.8h
  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)09l2 tlb miss data (0b)18191e3a3f51schedule 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)696d6emap 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)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042006015002000003025801081008000810080020500640132200202003920039997769990801202008003220016006420039200391180201100991001008000010000000000111511801600200360800001002004020040200402004020040
802042003915000000003025801081008000810080020500640132200202003920039997339997801002008000020016000020039200391180201100991001008000010000002000000511011611200360800001002004020040200402004020040
802042003915000000004125801001008000010080000500640000200202003920039997339997801002008000020016000020039200391180201100991001008000010000002000000511011611200360800001002004020040200402004020040
8020420039150000001504125801001008000010080000500640000200202003920039997339997801002008000020016000020039200391180201100991001008000010000004000000511011611200360800001002004020040200402004020040
802042003915000000004125801001008000010080000500640000200202003920039997339997801002008000020016000020039200391180201100991001008000010000000000000511011611200360800001002004020040200402004020040
802042003915000000004125801001008000010080000500640000200202003920039997339997801002008000020016000020039200391180201100991001008000010000000000000511011611200360800001002004020040200402004020040
8020420039150000000041258010010080000100800005006400002002020039200399973399978010020080000200160000200392003911802011009910010080000100000050150000511011622200360800001002004020040200402004020040
802042003915000000004125801001008000010080000500640000200202003920039997339997801002008000020016000020039200391180201100991001008000010000001000000511011611200360800001002004020040200402004020040
802042003915000000004125801001008000010080000500640000200202003920039997339997801002008000020016000020039200391180201100991001008000010000000030000511011611200360800001002004020040200402004020040
802042003915000000004125801001008000010080000500640000200202003920039997339997801002008000020016000020039200391180201100991001008000010000001030000511011611200360800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03l2 tlb miss data (0b)1e3f51schedule 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)accdcfd5map dispatch bubble (d6)dbddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200481500040258001010800001080000506400000200202003920039999631001980010208000020160000200392003911800211091010800001000050206160642003680000102004020040200402004020040
80024200391500040258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000050202160242003680000102004020040200402004020040
800242003915000402580010108000010800005064000002002020039200399996310019800102080000201600002003920039118002110910108000010112050206170342003680000102004020040200402004020040
80024200391501040258001010800001080000506400000200202003920039999631001980010208000020160000200392003911800211091010800001010050204160242003680000102004020040200402004020040
80024200391500040258001010800001080000506400000200202003920039999631001980010208000020160000200392003911800211091010800001000050204160242003680000102004020040200402004020040
80024200391500040258001010800001080000506400000200202003920039999631001980010208000020160000200392003911800211091010800001000050204160422003680000102004020040200402004020040
80024200391500040258001010800001080000506400000200202003920039999631001980010208000020160000200392003911800211091010800001000050204160242003680000102004020040200402004020040
80024200391500040258001010800001080000506400000200202003920039999631001980010208000020160000200392003911800211091010800001000050202160422003680000102004020040200402004020247
80024200391500040258001010800001080000506400000200202003920039999631001980010208000020160000200392003911800211091010800001000050202160242003680000102004020040200402004020040
80024200391500040258001010800001080000506400000200202003920039999631001980010208000020160000200392003911800211091010800001010050204160422003680000102004020040200402004020040