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

ADD (register, 64-bit)

Test 1: uops

Code:

  add x0, x0, x1
  mov x0, 1
  mov x1, 2

(no loop instructions)

1000 unrolls and 1 iteration

Retires: 1.000

Issues: 1.000

Integer unit issues: 1.000

Load/store unit issues: 0.000

SIMD/FP unit issues: 0.000

retire uop (01)cycle (02)031e3f4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)606d6emap 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 int alu (97)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
1004103580618622510001000100016916110351035728386810001000200010354111100110000073241119371000100010361036103610361036
1004103580618622510001000100016916010351035728386810001000200010354111100110000073141119371000100010361036103610361036
1004103570618622510001000100016916010351035728386810001000200010354111100110000073141119371000100010361036103610361036
1004103580618622510001000100016916010351035728386810001000200010354111100110000073141119371000100010361036103610361036
1004103570618622510001000100016916010351035728386810001000200010354111100110000073141119371000100010361036103610361036
1004103570618622510001000100016916010351035728386810001000200010354111100110000073141119371000100010361036103610361036
10041035806186225100010001000169160103510357283868100010002000103541111001100001273141119371000100010361036103610361036
1004103580618622510001000100016916010351035728386810001000200010354111100110000073141119371000100010361036103610361036
1004103570618622510001000100016916010351035728386810001000200010354111100110000073141119371000100010361036103610361036
1004103580618622510001000100016916010351035728386810001000200010354111100110000073141119371000100010361036103610361036

Test 2: Latency 1->2

Code:

  add x0, x0, x1
  mov x0, 1
  mov x1, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 1.0035

retire uop (01)cycle (02)0309l2 tlb miss data (0b)18191e3f4d51schedule 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)9fl1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
102041003576000006198772510100101001010088664149695510035100358580387221010010200202001003541111020110099100101001000071023722994110000101001003610036100361003610036
10204100357500003126198772510100101001010088664149695510035100358580387221010010200202001003541111020110099100101001000071023722994110000101001003610036100361003610036
10204100357500000251987725101001010010100886641496955100351003585803872210100102002020010035411110201100991001010010020071023722994110000101001003610036100361003610036
1020410035750000061987725101001010010100886641496955100351003585803872210100102002020010035411110201100991001010010020071023722994110000101001003610036100361003610036
102041003575000006198772510100101001010088664149695510035100358580387221010010200202001003541111020110099100101001000071023722994110000101001003610036100361003610036
102041003575000006198772510100101001010088664149695510035100358580387221010010200202001003541111020110099100101001000071023722994110000101001003610036100361003610036
102041003575000006198772510100101001010088664149695510035100358580387221010010200202001003541111020110099100101001000071023722994110000101001003610036100361003610036
1020410035750000061987725101001010010100886641496955100351003585803872210100102002020010035411110201100991001010010036071023722994110000101001003610036100361003610036
1020410035750000061987725101001010010100886641496955100351003585803872210100102002020010035411110201100991001010010031071023722994110000101001003610036100361003610036
1020410035750000061987725101001010010100886641496955100351003585803872210100102002020010035411110201100991001010010001571023722994110000101001003610036100361003610036

1000 unrolls and 10 iterations

Result (median cycles for code): 1.0035

retire uop (01)cycle (02)03l1i tlb fill (04)181e3f4d51schedule 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)9fl1d cache writeback (a8)acc2branch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
10024100357600061986325100101001010010887841496955100351003586023874010010100202002010035411110021109101001010000064024122994010000100101003610036100361003610036
10024100357500061986325100101001010010887840496955100351003586023874010010100202002010035411110021109101001010000064024122994010000100101003610036100361003610036
10024100357500061986325100101001010010887841496955100351003586023874010010100202002010035411110021109101001010000064024122994010000100101003610036100361003610036
100241003575001261986325100101001010010887840496955100351003586023874010010100202002010035411110021109101001010000064024122994010000100101003610036100361003610036
10024100357500061986325100101001010010887841496955100351003586023874010010100202002010035411110021109101001010000064024122994010000100101003610036100361003610036
10024100357500061986325100101001010010887841496955100351003586023874010010100202002010035411110021109101001010600064024122994010000100101003610036100361003610036
10024100357500061986325100101001010010887840496955100351003586023874010010100202002010035411110021109101001010000064024122994010000100101003610036100361003610036
10024100357500061986325100101001010010887841496955100351003586023874010010100202002010035411110021109101001010000064024122994010000100101003610036100361003610036
10024100357500061986325100101001010010887841496955100351003586023874010010100202002010035411110021109101001010000064024122994010000100101003610036100361003610036
10024100357600061986325100101001010010887841496955100351003586023874010010100202002010035411110021109101001010230064024122994010000100101003610036100361003610036

Test 3: Latency 1->3

Code:

  add x0, x1, x0
  mov x0, 1
  mov x1, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 1.0035

retire uop (01)cycle (02)03091e1f3f4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)60696a6b6d6emap 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 cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
10204100357500061987725101001010010100886640496955010035100358580387221010010200202001003541111020110099100101001001071013711994110000101001003610036100361003610036
10204100357500061987725101001010010100886640496955010035100358580387221010010200202001003541111020110099100101001000071013711994110000101001003610036100361003610036
10204100357500061987725101001010010100886640496955010035100358580387221010010200202001003541111020110099100101001000071013711994110000101001003610036100361003610036
10204100357500061987725101001010010100886640496955010035100358580387221010010200202001003541111020110099100101001000071013711997510000101001003610036100361003610036
10204100357500061987725101001010010100886640496955010035100358580387221010010200202001003541111020110099100101001001071013711994110000101001003610036100361003610036
10204100357501440156987725101001010010100886640496955010035100358580387221010010200202001003541111020110099100101001000071013711994110000101001003610036100361003610036
10204100357500061987725101001010010100886640496955010035100358580387221010010200202001003541111020110099100101001002071013711994110000101001003610036100361003610036
10204100357500061987725101001010010100886641496955010035100358580387221010010200202001003541111020110099100101001000071013711994110000101001003610036100361003610036
10204100357500061987725101001010010100886640496955010035100358580387221010010200202001003541111020110099100101001000071013711994110000101001003610036100361003610036
10204100357500061987725101001010010100886640496955010035100358580387221010010200202001003541111020110099100101001000071011711994110000101001003610036100361003610036

1000 unrolls and 10 iterations

Result (median cycles for code): 1.0035

retire uop (01)cycle (02)03mmu table walk data (08)191e1f3f4d51schedule 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 cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
100241003575000061986325100101001010010887844969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036
100241003575000061986325100101001010010887844969551003510035860238740100101002020020100354111100211091010010101064024122994010000100101003610036100361003610036
100241003575000061986325100101001010010887844969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036
100241003575000061986325100101001010010887844969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036
100241003575000061986325100101001010010887844969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036
100241003575000061986325100101001010010887844969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036
100241003575000061986325100101001010010887844969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036
100241003575000061986325100101001010010887844969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036
100241003575000061986325100101001010010887844969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036
100241003575100061986325100101001010010887844969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036

Test 4: throughput

Count: 8

Code:

  add x0, x8, x9
  add x1, x8, x9
  add x2, x8, x9
  add x3, x8, x9
  add x4, x8, x9
  add x5, x8, x9
  add x6, x8, x9
  add x7, x8, x9
  mov x8, 9
  mov x9, 10

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.1673

retire uop (01)cycle (02)03mmu table walk instruction (07)l2 tlb miss instruction (0a)181e3f51schedule 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 cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
802041341910000003525801008010080100400500491030613386133863323333418010080200160200133863911802011009910080100100005110319221338380000801001338713387133871338713387
802041338610100003525801008010080100400500491030613386133863323333418010080200160200133863911802011009910080100100005110219221338380000801001338713387133871338713387
802041338610100003525801008010080100400500491030613386133863323333418010080200160200133863911802011009910080100100005110219221338380000801001338713387133871338713387
802041338610000003525801008010080100400500491030613386133863323333418010080200160200133863911802011009910080100100035110219221338380000801001338713387133871338713387
802041338610100003525801008010080100400500491030613386133863323333418010080200160200133863911802011009910080100100005110219221338380000801001338713387133871338713387
802041338610000003525801008010080100400500491030613386133863323333418010080200160200133863911802011009910080100100035110219221338380000801001338713387133871338713387
802041338610000003525801008010080100400500491030613386133863323333418010080200160200133863911802011009910080100100005110219221338380000801001338713387133871338713387
8020413386100000035258010080100801004005004910306133861338633233334180100802001602001338639118020110099100801001005505110219221338380000801001338713387133871338713387
8020413386100000035258010080100801004005004910306133861338633232433418010080200160200133863911802011009910080100100005110219121338380000801001642113387133871338713387
802041338610000003525801008010080100400500491030613386133863323333418010080200160200133863911802011009910080100100195110219221338380000801001338713387133871338713387

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.1671

retire uop (01)cycle (02)0309181e3f51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)5f60696a6d6emap 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 cache writeback (a8)acbranch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
80024133861000003525800108001080010400050104910291133711337133303334880010800201600201337139118002110910800101000005020319111336880000800101337213372133721337213372
800241355010000035258001080010800104000500049102911337113371333033348800108002016002013371391180021109108001010013305020119111336880000800101337213372133721337213372
80024133711000003525800108001080010400050004910291133711337133303334880010800201600201337139118002110910800101000305020119111336880000800101337213372133721337213372
80024133711000003525800108001080010400050004910291133711337133303334880010800201600201337139118002110910800101002005020119111336880000800101337213372133721337213372
800241337110000035258001080010800104000500049102911337113371333033348800108002016002013371391180021109108001010021005020119111336883049800101337213372133721337213372
80024133711010003525800108001080010400050004910291133711337133303334880010800201600201337139118002110910800101001905020119111336880000800101337213372133721337213372
800241337110001635258001080010800104000500049102911337113371333033348800108002016002013371391180021109108001010015005020119111336880000800101337213372133721337213372
80024133711000003525800108001080010400050004910291133711337133303334880010800201600201337139118002110910800101000005020119111336880000800101337213372133721337213372
80024133711000003525800108001080010400050004910291133711337133303334880010800201600201337139118002110910800101001005020119111336880000800101337213372133721337213372
80024133711000003525800108001080010400050004910291133711337133303334880010800201600201337139118002110910800101000005020219221336880000800101337213372133721337213372