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, 32-bit)

Test 1: uops

Code:

  add w0, w0, w1
  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
1004103580618622510001000100016916010351035728386810001000200010354111100110000073241119371000100010361036103610361036
1004103570618622510001000100016916010351035728386810001000200010354111100110000073141119371000100010361036103610361036
1004103570618622510001000100016916010351035728386810001000200010354111100110000073141119371000100010361036103610361036
1004103570618622510001000100016916010351035728386810001000200010354111100110000073141119371000100010361036103610361036
1004103570618622510001000100016916010351035728386810001000200010354111100110000073141119371000100010361036103610361036
1004103570618622510001000100016916010351035728386810001000200010354111100110000373141119371000100010361036103610361036
1004103570618622510001000100016916010351071728386810001000200010354111100110000073141119371000100010361036103610361036
1004103580618622510001000100016916010351035728386810001000200010354111100110000073141119371000100010361036103610361036
1004103580618622510001000100016916010351035728386810001000200010354111100110000073141119371000100010361036103610361036
1004103570618622510001000100016916010351035728386810001000200010354111100110000073141119371000100010361036103610361036

Test 2: Latency 1->2

Code:

  add w0, w0, w1
  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)03l2 tlb miss data (0b)1e3f4d51schedule 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 tlb access (a0)ld unit uop (a6)l1d cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
102041003575006198772510100101001010088664149695510035100358580387221010010200202001003541111020110099100101001000000071013711994110000101001003610036100361003610036
1020410035751126198772510100101001010088664149695510035100358580387221010010200202001003541111020110099100101001000000071013711994110000101001003610036100361003610036
102041003575006198772510100101001010088664149695510035100358580387221010010200202001003541211020110099100101001000000071013711994110000101001003610036100361003610036
1020410035750126198772510100101001010088664049695510035100358580387221010010200202001003541111020110099100101001000000071013711994110000101001003610036100361003610036
102041003575008498772510100101001010088664149695510035100358580387221010010200202001003541111020110099100101001000000071013711994110000101001003610036100361003610036
102041003575006198772510100101001010088664149695510035100358580387221010010200202001003541111020110099100101001000000071013711994110000101001003610036100361003610036
102041003575008298772510100101001010088664049695510035100358580387221010010200202001003541111020110099100101001000000071013711994110000101001003610036100361003610036
102041003575006198772510100101001010088664149695510035100358580387221010010200202001003541111020110099100101001000000071013711994110000101001003610036100361003610036
102041003575006198772510100101001010088664049695510035100358580387221010010200202001003541111020110099100101001000000071013711994110000101001003610036100361003610036
102041003575006198772510100101001010088664049695510035100358580387221010010200202001003541111020110099100101001000000071013711994110000101001003610036100361003610036

1000 unrolls and 10 iterations

Result (median cycles for code): 1.0035

retire uop (01)cycle (02)031e3f4d51schedule 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)9fcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
10024100357506198632510010100101001088784149695510035100358602387401001010020200201003541111002110910100101064034122994010000100101003610036100361003610036
10024100357506198632510010100101001088784149695510035100358602387401001010020200201003541111002110910100101064024122994010000100101003610036100361003610036
10024100357506198632510010100101001088784149695510035100358602387401001010020200201003541111002110910100101064024122994010000100101003610036100361003610036
10024100357506198632510010100101001088784149695510035100358602387401001010020200201003541111002110910100101064024122994010000100101003610036100361003610036
100241003575012498632510010100101001088784149695510035100358602387401001010020200201003541111002110910100101064024122994010000100101003610036100361003610036
10024100357506198632510010100101001088784149695510035100358602387401001010020200201003541111002110910100101064024122994010000100101003610036100361003610036
100241003575012498632510010100101001088784149695510035100358602387401001010020200201003541111002110910100101064024122994010000100101003610036100361003610036
10024100357506198632510010100101001088784149695510035100358602387401001010020200201003541111002110910100101064024122994010000100101003610036100361003610036
10024100357506198632510010100101001088784149695510035100358602387401001010020200201003541111002110910100101064024122994010000100101003610036100361003610036
100241003575188298632510010100101001088784149695510035100358602387401001010020200201003541111002110910100101064024122994010000100101003610036100361003610036

Test 3: Latency 1->3

Code:

  add w0, w1, w0
  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)031e3f4d51schedule 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)l1d cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
10204100357501669877251010010100101008866449695510035100358580387221010010200202001003541111020110099100101001000000071013711994110000101001003610036100361003610036
1020410035759619877251010010100101008866449695510035100358580387221010010200202001003541111020110099100101001000000071013711994110000101001003610036100361003610036
10204100357501459877251010010100101008866449695510035100358580387221010010200202001003541111020110099100101001000000071013711994110000101001003610036100361003610036
1020410035759619877251010010100101008866449695510035100358580387221010010200202001003541111020110099100101001000000071013711994110000101001003610036100361003610036
1020410035750619877251010010100101008866449695510035100358580387221010010200202001003541111020110099100101001000000071013711994110000101001003610036100361003610036
1020410035760619877251010010100101008866449695510035100358580387221010010200202001003541111020110099100101001000000071013711994110000101001003610036100361003610036
1020410035750829877251010010100101008866449695510035100358580387221010010200202001003541111020110099100101001000000071013711994110000101001003610036100361003610036
1020410035750619877251010010100101008866449695510035100358580387221010010200202001003541111020110099100101001000000071013711994110000101001003610036100361003610036
1020410035750619877251010010100101008866449695510035100358580387221010010200202001003541111020110099100101001000000071013711994110000101001003610036100361003610036
1020410035750619877251010010100101008866449695510035100358580387221010010200202001003541111020110099100101001000000071013711994110000101001003610036100361003610036

1000 unrolls and 10 iterations

Result (median cycles for code): 1.0035

retire uop (01)cycle (02)031e3f4d51schedule 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
10024100357501039863251001010010100108878414969551003510035860238740100101002020020100354111100211091010010100064024134994010000100101003610036100361003610036
1002410035750619863251001010010100108878414969551003510035860238740100101002020020100354111100211091010010100064044143994010000100101003610036100361003610036
100241003575159619863251001010010100108878414969551003510035860238740100101002020020100354111100211091010010100064044144994010000100101003610036100361003610036
1002410035750829863251001010010100108878414969551003510035860238740100101002020020100354111100211091010010100064034134994010000100101003610036100361003610036
10024100357505369863251001010010100108878404969551003510035860238740100101002020020100354111100211091010010101364044144994010000100101003610036100361003610036
1002410035750619878251001010010100108878414969551003510035860238740100101002020020100354111100211091010010100064034143994010000100101003610036100361003610036
10024100357563619863251001010010100108878404969551003510035860238740100101002020020100354111100211091010010100064044134994010000100101003610036100361003610036
1002410035760619863251001010010100108878414969551003510035860238740100101002020020100354111100211091010010100064044143994010000100101003610036100361003610036
1002410035750619863251001010010100108878404969551003510035860238740100101002020020100354111100211091010010100064034143994010000100101003610036100361003610036
100241003575342619863251001010010100108878404969551003510035860238740100101002020020100354111100211091010010100064044144994010000100101003610036100361003610036

Test 4: throughput

Count: 8

Code:

  add w0, w8, w9
  add w1, w8, w9
  add w2, w8, w9
  add w3, w8, w9
  add w4, w8, w9
  add w5, w8, w9
  add w6, w8, w9
  add w7, w8, w9
  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)0309181e1f3f51schedule 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)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
80204134181000000852580100801008024940050014910306134501338633233334180100803311602001338639118020110099100801001000035110219111338380000801001338713387133871338713387
80204133861010000772580100801008010040050014910306133861338633233334180100802001602001338639118020110099100801001000005110119111338380000801001338713387133871338713387
80204133861000000352580100801008010040050014910306133861338633233334180100802001602001338639118020110099100801001000005110119111338380000801001338713387133871338713387
80204133861000000352580100801008010040050014910306133861338633233334180100802001602001338639118020110099100801001000005110119111338380000801001338713387133871338713387
802041338610000120352580100801008010040050014910306133861338633233334180100802001602001338639118020110099100801001000005110119111338380000801001338713387133871338713387
80204133861001100982580100801008010040050014910306133861338633233334180100802001602001338639118020110099100801001000005110119111338380000801001338713387133871338713387
80204133861000000352580100801008010040050014910306133861338633233334180100802001602001338639118020110099100801001000005110119111338380000801001338713387133871338713387
802041338610000120352580100801008010040050014910306133861338633233334180100802001602001338639118020110099100801001000005110119111338380000801001338713387133871338713387
80204133861000000352580100801008010040050014910306133861338633233334180100802001602001338639118020110099100801001000005110119111338380000801001338713387133871338713387
802041338610000007002580100801008010040050014910306133861338633233334180100802001602001338639118020110099100801001000005110119111338380000801001338713387133871338713387

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03mmu table walk data (08)1e1f3f51schedule 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 tlb miss (a1)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)dfe0? int output thing (e9)? int retires (ef)f5f6f7f8fd
80024133761000210352580010800108001040005004910291133711337133303334880010800201600201337139118002110910800101000050244192221336880000800101337213372133721337213372
8002413371100000352580010800108001040005004910291133711337133303334880010800201600201337139118002110910800101000050242192221336880000800101337213372133721337213372
8002413371100000352580010800108001040005014910291133711337133303334880010800201600201337139118002110910800101000050242192221336880000800101337213372133721337213372
8002413371100000352580010800108001040005004910291133711337133303334880010800201600201337139118002110910800101000050243192221336880000800101337213372133721337213372
8002413371101000352580010800108001040005004910291133711337133303334880010800201600201337139118002110910800101000050242192221336880000800101337213372133721337213372
8002413371100000352580010800108001040005004910291133711337133303334880010800201600201337139118002110910800101000050242192221336880000800101337213372133721337213372
80024133711000603525800108001080010400050149102911337113371333033348800108002016002013371391180021109108001010001850243192221336880000800101337213372133721337213372
80024133711000604152580010800108001040005014910291133711337133303334880010800201600201337139118002110910800101000950242192221336880000800101337213372133721337213372
8002413371100000562580010800108001040005014910291133711337133303334880010800201600201337139118002110910800101000050242192221336880000800101337213372133721337213372
80024133711000003525800108001080010400050149102911337113371333033348800108002016002013371391180021109108001010006650242192221336880000800101337213372133721337213372