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 (sxtx, 64-bit)

Test 1: uops

Code:

  add x0, x0, x1, sxtx
  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)031e1f3f4d51schedule 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)91inst int alu (97)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
100410358006186225100010001000169161103510357283868100010002000103541111001010000073241119371000100010361036103610361036
100410358006186225100010001000169160103510357283868100010002000103541111001101910000073141119371000100010361036103610361036
100410358006186225100010001000169161103510357283868100010002000103541111001010000073141119371000100010361036103610361036
100410357606186225100010001000169160103510357283868100010002000103541111001010000073141119371000100010361036103610361036
100410358006186225100010001000169160103510357283868100010002000103541111001010000073141119371000100010361036103610361036
100410357006186225100010001000169160103510357283868100010002000103541111001010000073141119371000100010361036103610361036
100410358006186225100010001000169161103510357283868100010002000103541111001010000073141119371000100010361036103610361036
100410357006186225100010001000169161103510357283868100010002000103541111001010000073141119371000100010361036103610361036
100410358006186225100010001000169161103510357283868100010002000103541111001010000073141119371000100010361036103610361036
100410357006186225100010001000169161103510357283868100010002000103541111001010000073141119371000100010361036103610361036

Test 2: Latency 1->2

Code:

  add x0, x0, x1, sxtx
  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)03mmu table walk data (08)1e1f3f4d51schedule 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)l1d tlb miss (a1)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
1020410035750001269877251010010100101008866414969551003510035858038722101001020020200100354111102011009910010100100000071013711994110000101001003610036100361003610036
102041003575000619877251010010100101008866404969551003510035858038722101001020020200100354111102011009910010100100000071013711994110000101001003610036100361003610036
102041003575030619877251010010100101008866404969551003510035858038722101001020020200100354111102011009910010100100000071013711994110000101001003610036100361003610036
102041003575000619877251010010100101008866404969551003510035858038722101001020020200100354111102011009910010100100000071013711994110000101001003610036100361003610036
102041003575000619877251010010100101008866404969551003510035858038722101001020020200100354111102011009910010100100000071013711994110000101001003610036100361003610036
1020410035750004189877251010010100101008866404969551003510035858038722101001020020200100354111102011009910010100100000071013711994110000101001003610036100361003610036
1020410035750001039877251010010100101008866404969551003510035858038722101001020020200100354111102011009910010100100000071013711994110000101001003610036100361003610036
102041003575000619877251010010100101008866414969551003510035858038722101001020020200100354111102011009910010100100000071013711994110000101001003610036100361003610036
102041003575000619877251010010100101008866404969551003510035858038722101001020020200100354111102011009910010100100000371013711994110000101001003610036100361003610036
1020410035750002519877251010010100101008866414969551003510035858038722101001020020200100354111102011009910010100100000071013711994110000101001003610036100361003610036

1000 unrolls and 10 iterations

Result (median cycles for code): 1.0035

retire uop (01)cycle (02)03181e3f4d51schedule 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 cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
100241003575001649863251001010010100108878449695510035100358602387401001010020200201003541111002110910100101000064024122994010000100101003610036100361003610036
10024100357500619863251001010010100108878449695510035100358602387401001010020200201003541111002110910100101001064024122994010000100101003610036100361003610036
10024100357500619863251001010010100108878449695510035100358602387401001010020200201003541111002110910100101000064024122994010000100101003610036100361003610036
10024100357510849863251001010010100108878449695510035100358602387401001010020200201003541111002110910100101000064024122994010000100101003610036100361003610036
10024100357500619863251001010010100108878449695510035100358602387401001010020200201003541111002110910100101000064024122994010000100101003610036100361003610036
100241003575001039863251001010010100108878449695510035100358602387401001010020200201003541111002110910100101000064024122994010000100101003610036100361003610036
100241003575001039863251001010010100108878449695510035100358602387401001010020204281003541111002110910100101000364024122994010000100101003610036100361003610036
10024100357500619863251001010010100108878449695510035100358602387401001010020200201003541111002110910100101000064024122994010000100101003610036100361003610036
10024100357500619863251001010010100108878449695510035100358602387401001010020200201003541111002110910100101000064024122994010000100101003610036100361003610036
10024100357500669863251001010010100108878449695510035100358602387401001010020200201003541111002110910100101000364024122994010000100101003610036100361003610036

Test 3: Latency 1->3

Code:

  add x0, x1, x0, sxtx
  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)03mmu table walk data (08)18191e3a3f4d51schedule 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 miss (a1)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
1020410035750000014798772510100101001010088664496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
1020410035750000012498772510100101001010088664496955100351003585803872210100102002020010035411110201100991001010010000071013711994110065101001003610036100361003610036
102041003575000006198772510100101001010088664496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
1020410035750000010398772510100101001010088664496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
102041003575010006198772510100101001010088664496955100821008185803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
1020410035750000012498772510100101001010092637496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
1020410035750000012498772510100101001010088664496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
1020410035750000012498772510100101001010088664496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
102041003575000006198772510100101001010088664496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
1020410035751000012498772510100101001010088664496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036

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)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)9fcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
10024100357515619863251001010010100108878449695510035100358602387401001010020200201003541111002110910100101064024122994010000100101003610036100361003610036
1002410035750619863251001010010100108878449695510035100358602387401001010020200201003541111002110910100101064024122994010000100101003610036100361003610036
1002410035750619863251001010010100108878449695510035100358602387401001010020200201003541111002110910100101064024122994010000100101003610036100361003610036
1002410035750619863251001010010100108878449695510035100358602387401001010020200201003541111002110910100101064024122994010000100101003610036100361003610036
1002410035750619863251001010010100108878449695510035100358602387401001010020200201003541111002110910100101064024122994010000100101003610036100361003610036
1002410035760619863251001010010100108878449695510035100358602387401001010020200201003541111002110910100101064024122994010000100101003610036100361003610036
1002410035750619863251001010010100108878449695510035100358602387401001010020200201003541111002110910100101064024122994010000100101003610036100361003610036
1002410035763619863251001010010100108878449695510035100358602387401001010020200201003541111002110910100101064024122994010000100101003610036100361003610036
1002410035750619863251001010010100108878449695510035100358602387401001010020200201003541111002110910100101064024122994010000100101003610036100361003610036
1002410035750619863251001010010100108878449695510035100358602387401001010020200201003541111002110910100101064024122994010000100101003610036100361003610036

Test 4: throughput

Count: 8

Code:

  add x0, x8, x9, sxtx
  add x1, x8, x9, sxtx
  add x2, x8, x9, sxtx
  add x3, x8, x9, sxtx
  add x4, x8, x9, sxtx
  add x5, x8, x9, sxtx
  add x6, x8, x9, sxtx
  add x7, x8, x9, sxtx
  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)031e3f51schedule 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
80204134171003352580100801008010040050014910306133861338633233334180100802001602001338639118020110099100801001005110419221338380000801001338713387133871338713387
80204133861000352580100801008010040050014910306133861338633233334180100802001602001338639118020110099100801001005110219221338380000801001338713387133871338713387
80204133861000352580100801008010040050014910306133861338633233334180100802001602001338639118020110099100801001005110219221338380000801001338713387133871338713387
80204133861000352580100825768010040050004910306133861338633233334180100802001602001338639118020110099100801001005110219221338380000801001338713387133871338713387
80204133861010352580100801008010040050004910306133861338633233334180100802001602001338639118020110099100801001005110219221338380000801001338713387133871338713387
80204133861000562580100801008010040050004910306133861338633233334180100802001602001338639118020110099100801001005110219221338380000801001338713387133871338713387
80204133861000352580100801008010040050004910306133861338633233334180100802001602001338639118020110099100801001005110219221338380000801001338713387133871338713387
80204133861000352580100801008010040050004910306133861338633233334180100802001602001338639118020110099100801001005110219221338380000801001338713387133871338713387
80204133861000352580100801008010040050004910306133861338633233334180100802001602001338639118020110099100801001005110219221338380000801001338713387133871338713387
80204133861000352580100810818010040050004910306133861338633233334180100802001602001338639118020110099100801001005110219221338380000801001338713387133871338713387

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)031e1f3f51schedule 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)9faccfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
800241337610000352580010800108001240005004910291013371133713330333488001080020160020133713911800211091080010101205020119111336880000800101337213372133721337213372
80024133711000035258001080010800124000500491029101337113371333033348800108002016002013371391180021109108001010665020119111336880000800101337213372133721337213372
8002413371100003525800108001080012400050149102910133711337133303334880010800201600201337139118002110910800101005020119111336880000800101337213372133721337213372
8002413371100132035258001080010800124000501491029101337113371333033348800108002016002013371391180021109108001010425020119111344180000800101337213372133721337213372
8002413371100003525800108001080012400050049102910133711337133303334880010800201600201337139118002110910800101005020119111336880000800101337213372133721337213372
8002413371100003525800108001080012400050049102910133711337133303334880010800201600201337139118002110910800101005020119111336880000800101337213372133721337213372
800241337110021303525800108001080012400050049102910133711337133303334880010800201600201337139118002110910800101005020119111336880000800101337213372133721337213372
800241337110023403525800108001080012400050049102910133711337133303334880010800201600201337139118002110910800101005020119111336880000800101337213372133721337213372
8002413371100003525800108001080012400050049102910133711337133303334880010800201600201337139118002110910800101005020119111336880000800101337213372133721337213372
8002413371100003525800108001080012400050049102910133711337133303334880010800201600201337139118002110910800101005020119111336880000800101337213372133721337213372