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

CMP (register, lsl, 32-bit)

Test 1: uops

Code:

  cmp w0, w1, lsl #17
  mov x0, 1
  mov x1, 2

(no loop instructions)

1000 unrolls and 1 iteration

Retires: 1.000

Issues: 2.000

Integer unit issues: 2.000

Load/store unit issues: 0.000

SIMD/FP unit issues: 0.000

retire uop (01)cycle (02)031e3f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)606d6emap stall dispatch (70)flags prf full (73)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst int alu (97)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)f5f6f7f8fd
100470950831000304252000200010004087707097094982135611000100020007097811100110000073122116842000710710710710710
100470960611000304252000200010004087717097094982535611000100020007097811100110000073122116842000710710710710710
100470950611000304252000200010004087707097094982135611000100020007097811100110000073122116842000710710710710710
100470950611000304252000200010004087707097094982535611000100020007097811100110000073122116842000710710710710710
100470960611000304252000200010004087707097094982535611000100020007097811100110000073122116842000710710710710710
100470950611000304252000200010004087717097094982535611000100020007097811100110001073122116842000710710710710710
100470960611000304252000200010004087707097094982135611000100020007097811100110000073122116842000710710710710710
100470950611000304252000200010004087707097094982135611000100020007097811100110000073122116842000710710710710710
100470950611000304252000200010004087707097094982135611000100020007097811100110000073122116842000710710710710710
100470950611000304252000200010004087717097094982135611000100020007097811100110000073122116842000710710710710710

Test 2: Latency 3->1

Chain cycles: 1

Code:

  cmp w0, w1, lsl #17
  cset x0, cc
  mov x0, 1
  mov x1, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code, minus 1 chain cycle): 2.0035

retire uop (01)cycle (02)03mmu table walk data (08)l2 tlb miss data (0b)1e1f3f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)60696a6d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)9fld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)a9acc2branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd0d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
202043003522500006110000298992530100301002010719562401492695530035300352739162748720107202243023630035145112020110099100201001010000103011113180116112998130000101003003630036300363003630036
202043003522500006110000298992530100301002010719562400492695530035300352739162748720107202243023630035145112020110099100201001010000300011113180116112998130000101003003630036300363003630036
202043003522500006110000298992530100301002010719562400492695530035300352739162748720107202243023630035145112020110099100201001010000100011113180116112998130000101003003630036300363003630036
202043003522500006110000298992530100301002010719562401492695530035300352739162748720107202243023630035145112020110099100201001010020100011113180116112998130000101003003630036300363003630036
202043003522501006110000298992530100301002010719562401492695530035300352736932747820100202003020030035145112020110099100201001010000300000013101231222995430000101003003630036300363003630036
202043003523300009410000298932530100301002010019561980492695530035300352736932747820100202003020030035145112020110099100201001010000100000013101231222995430000101003003630036300363003630036
202043003522500006110000298932530100301002010019561980492695530035300352736932747820100202003020030035145112020110099100201001010000000000013101231222995430000101003003630036300363003630036
202043003522500006110000298932530100301002010019561981492695530035300352736932747820100202003020030035145112020110099100201001010000000000013101231222995430000101003003630036300363003630036
202043003522400006110000298932530100301002010019561980492695530035300352736932747820100202003020030066145112020110099100201001010000106000013101231222995430000101003003630036300363003630036
202043003522500006110000298932530100301002010019561980492695530035300352736932747820100202003020030035145112020110099100201001010000100000013101231222995430000101003003630036300363003630036

1000 unrolls and 10 iterations

Result (median cycles for code, minus 1 chain cycle): 2.0035

retire uop (01)cycle (02)031e3a3f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)60696a6b6d6emap stall dispatch (70)flags prf full (73)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)9fl1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
2002430035225018410000298912530010300102001019562890492695503003530035273910327498200102002030020300351451120021109102001010010001270133112995830000100103003630036300363003630036
2002430035225016110000298912530010300102001019562890492695503003530035273910327498200102002030020300351451120021109102001010010001270133112995830000100103003630036300363003630036
2002430035224018410000298912530010300102001019562890492695503003530035273910327498200102002030020300351451120021109102001010010001270133112995830000100103003630036300363003630036
2002430035224018410000298912530010300102001019562890492695503003530035273910327498200102002030020300351451120021109102001010010001270133112995830000100103003630036300363003630036
20024300352240114910000298912530010300102001019562890492695503003530035273910327498200102002030020300351451120021109102001010010001270133112995830000100103003630036300363003630036
20024300352250112610000298912530010300102001019562890492695503003530035273910327498200102002030020300351451120021109102001010010001270133112995830000100103003630036300363003630036
2002430035225018410000298912530010300102001019562890492695503003530035273910327498200102002030020300351451120021109102001010010001270133112995830000100103003630036300363003630036
2002430035225018410000298912530010300102001019562890492695503003530035273910327498200102002030020300351451120021109102001010010001295133112995830000100103003630036300363003630036
2002430035225018410000298912530010300102001019562890492695503003530035273910327498200102002030020300351451120021109102001010010001270133112995830000100103003630036300363003630036
2002430035225618410000298912530010300102001019562890492695503003530035273910327498200102002030020300351451120021109102001010010101270133112995830000100103003630036300363003630036

Test 3: Latency 3->2

Chain cycles: 1

Code:

  cmp w0, w1, lsl #17
  cset x1, cc
  mov x0, 1
  mov x1, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code, minus 1 chain cycle): 2.0035

retire uop (01)cycle (02)03mmu table walk data (08)181e3f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)696a6d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)9fl1d tlb access (a0)l1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)accfd0d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
202043003522500061100002989325301003010020100195619849269553003530035273693274782010020200302003003514511202011009910020100101000000013101331222995430000101003003630036300363003630036
202043003522500061100002989325301003010020100195619849269553003530035273693274782010020200302003003514511202011009910020100101000002013101231222995430000101003003630036300363003630036
202043003522500061100002989325301003010020100195619849269553003530035273693274782010020200302003003514511202011009910020100101000001013101231222995430000101003003630036300363003630036
202043003522500061100002989325301003010020100195619849269553003530035273693274782010020200302003003514511202011009910020100101000000013101231222995430000101003003630036300363003630036
2020430035225000611000029893253010030100201001956198492695530035300352736932747820100202003020030035145112020110099100201001010000305413101231222995430000101003003630036300363003630036
202043003522500061100002989325301003010020100195619849269553003530035273693274782010020200302003003514511202011009910020100101000000013101231222995430000101003003630036300363003630036
202043003522400061100002989325301003010020100195619849269553003530035273693274782010020200302003003514511202011009910020100101000000013101231222995430000101003003630036300363003630036
202043003522500961100002989325301003010020100195619849269553003530035273693274782010020200303323003514511202011009910020100101000000013101231232995430000101003003630036300363003630036
202043003522500661100002989325301003010020100195619849269553003530035273693274782010020200302003003529611202011009910020100101000001013101231222995430000101003003630036300363003630036
202043003522500061100002989325301003010020100195619849269553003530035273693274782010020200302003003514511202011009910020100101000001913101231222995430000101003003630036300363003630036

1000 unrolls and 10 iterations

Result (median cycles for code, minus 1 chain cycle): 2.0035

retire uop (01)cycle (02)03l2 tlb miss data (0b)3f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)60696a6d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)9fld unit uop (a6)l1d cache writeback (a8)acc2cfd0d2l1i cache miss demand (d3)d5map dispatch bubble (d6)d9dadbddfetch restart (de)e0? int output thing (e9)eb? int retires (ef)f5f6f7f8fd
20024300352250611000029891253001030010200101956289149269553003530035273913274982001020020300203017014511200211091020010100100000127000063300113529958300000100103003630036300363003630036
200243003522406110000298912530010300102001019562891492695530035300352739132749820010200203002030035145112002110910200101001000001270000113300061329958300000100103003630036300363003630036
2002430035225061100002989125300103001020010195628904926955300353003527391327498200102002030020300351451120021109102001010010000012703011333000111229958300000100103003630036300363003630036
2002430035225061100002989125300103001020010195628914926955300353003527391327498200102002030020300351451120021109102001010010000012700001333000111329958300000100103003630036300363003630036
200243003522506110000298912530010300102001019562890492695530035300352739132749820010200203002030035145112002110910200101001000001270030133301013529958300000100103003630036300363003630036
2002430035224061100002989125300103001020010195628914926955300353003527391327498200102002030020300351453120021109102001010010000012700001333001121129958300000100103003630036300363003630036
200243003522506110000298912530010300102001019562891492695530035300352739132749820010200203002030035145112002110910200101001000001270030633000131129958300000100103003630036300363003630036
200243003522506110000298912530010300102001019562891492695530035300352739132749820010200203002030035145112002110910200101001000001270000633000131229958300000100103003630036300363003630036
2002430035225061100002989125300103001020010195628904926955300353003527391327498200102002030020300351451120021109102001010010000012710011133011101229958300000100103003630036300363003630036
2002430035224061100002989125300103001020010195628914926955300353003527391327498200102002030020300351451120021109102001010010000012700001333000141429958300000100103003630036300363003630036

Test 4: throughput

Count: 8

Code:

  cmp w0, w1, lsl #17
  cmp w0, w1, lsl #17
  cmp w0, w1, lsl #17
  cmp w0, w1, lsl #17
  cmp w0, w1, lsl #17
  cmp w0, w1, lsl #17
  cmp w0, w1, lsl #17
  cmp w0, w1, lsl #17
  mov x0, 1
  mov x1, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.6676

retire uop (01)cycle (02)03l1i tlb fill (04)mmu table walk data (08)l2 tlb miss data (0b)1e1f3f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)60696a6d6emap stall dispatch (70)flags prf full (73)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)9fl1d tlb access (a0)ld unit uop (a6)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
8020453412401000006180000487412516010016010080100344000514950330534105341043298205034336080100802001602005341078118020110099100801001000000180511022411533921600001005341153411534115341153411
802045341040000000618000048741251601001601008010034400051495033053410534104329820603433608010080200160200534107811802011009910080100100000000511012411533921600001005341153411534115341153411
8020453410400000007268000048741251601001601008010034400050495033053410534104329820633433608010080200160200534107811802011009910080100100000000511012411533921600001005341153411534115341153411
802045341040000000618000048741251601001601008010034400050495033053410534104329820503433608010080200160200534107811802011009910080100100000000511012411533921600001005341153411534115341153411
802045341040000000618000048741251601001601008010034400051495033053410534104329820603433608010080200160200534107811802011009910080100100000000511012411533921600001005341153411534115341153411
802045341040000000618000048423251601001601008010034400051495033053410534104329820633433608010080200160200534107811802011009910080100100000030511012411533921600001005341153411534115341153411
802045341040000000618000048741251601001601008010034400051495033053410534104329820633433608010080200160200534107811802011009910080100100001200511012411533921600001005341153411534115341153411
802045341040000000618000048741251601001601008010034400051495033053410534104329820503433608010080200160200534107811802011009910080100100000000511012411533921600001005341153411534115341153411
802045341039900000828000048741251601001601008010034400051495033053410534104329820503433608010080200160200534107811802011009910080100100030000511012411533921600001005341153411534115341153411
802045341040000000618000048741251601001601008010034400051495033053410534104329820603433608010080200161076534107811802011009910080100100000000511012411534301600001005341153411534115341153411

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.6673

retire uop (01)cycle (02)03l2 tlb miss data (0b)181e1f3f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)60696a6d6emap stall dispatch (70)flags prf full (73)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)9fl1d tlb access (a0)l1d cache writeback (a8)a9acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
800245340140000006180000479462516001016001080010343813014950300533805338043290256234335280010800201600205338078118002110910800101000000050205247553359160000105338153381533815338153381
800245338039900006180000479462516001016001080010343813014950300533805338043290270734335280010800201600205338078118002110910800101000000050207245653359160000105338153381533815338153381
800245338040000006180000479462516001016001080010343813014950300533805338043290256234335280010800201600205338078118002110910800101000000050208248753359160000105338153381533815338153381
800245338040000006180000479462516001016001080010343813014950300533805338043290270734335280010800201600205338078118002110910800101000000050207248853359160000105338153381533815338153381
800245338039900006180000479462516001016001080010343813014950300533805338043290256234335280010800201600205338078118002110910800101000000050206246553359160000105338153381533815338153381
800245338040000006180000479462516001016001080010343813014950300533805338043290256234335280010800201600205338078118002110910800101000000050208248553359160000105338153381533815338153381
800245338040000006180000479462516001016001080010343813014950300533805338043290256234335280010800201600205338078118002110910800101000000050208247553359160000105338153381533815338153381
800245338039900006180000479462516001016001080010343813004950300533805338043290270734335280010800201600205338078118002110910800101000000050206246753359160000105338153381533815338153381
800245338039900006180000479462516001016001080010343813014950300533805338043290270734335280010800201600205338078118002110910800101000000050207246553359160000105338153381533815338153381
800245338040000006180000479462516001016001080010343813004950300533805338043290270734335280010800201600205338078118002110910800101000000050207247753359160000105338153381533815338153381