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 (sxtw, 32-bit)

Test 1: uops

Code:

  add w0, w0, w1, sxtw
  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 tlb access (a0)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
10041035706186225100010001000169160103510357283868100010002000103541111001100000973241229371000100010361036103610361036
10041035706186225100010001000169161103510357283868100010002000103541111001100000373241229371000100010361036103610361036
10041035806186225100010001000169161103510357283868100010002000103541111001100000073241229371000100010361036103610361036
10041035806186225100010001000169161103510357283868100010002000103541111001100000073241229371000100010361036103610361036
10041035806186225100010001000169161103510357283868100010002000103541111001100000073241229371000100010361036103610361036
10041035706186225100010001000169161103510357283868100010002000103541111001100000073241229371000100010361036103610361036
10041035706186225100010001000169161103510357283868100010002000103541111001100000073241229371000100010361036103610361036
10041035806186225100010001000169161103510357283868100010002000103541111001100000073241229371000100010361036103610361036
10041035806186225100010001000169161103510357283868100010002000103541111001100000073241229371000100010361036103610361036
100410358061862251000100010001691611035103572838681000100020001035411110011000002773241229371000100010361036103610361036

Test 2: Latency 1->2

Code:

  add w0, w0, w1, sxtw
  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)l2 tlb miss data (0b)18193f4d51schedule 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)9fld unit uop (a6)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
10204100357500008498772510100101001010088664496955100351003585803872210100102002020010035411110201100991001010010001071013711994110000101001003610036100361003610036
10204100357500008298772510100101001010088664497001100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
102041003575000016498772510100101001010088664496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
102041003575000017698772510100101001010088664496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
10204100357500006198772510100101001010088664496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
102041003575000025198772510100101001010088664496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
10204100357500006198772510100101001010088664496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
102041003575000016498772510100101001010088664496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
102041003575000022798772510100101001010088664496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
10204100357500008298772510100101001010088664496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036

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 tlb access (a0)ld unit uop (a6)l1d cache writeback (a8)acbranch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
10024100357502819863251001010010100108878414969551003510035860238740100101002020020100354111100211091010010100000064044133994010000100101003610036100361003610036
1002410035750619863251001010010100108878404969551003510035860238740100101002020020100354111100211091010010100013064034133994010000100101003610036100361003610036
1002410035750619863251001010010100108878414969551003510035860238740100101002020020100804121100211091010010100000064034133994010000100101003610036100361003610036
1002410035750829863251001010010100108878414969551003510035860238740100101002020020100354111100211091010010100000064034133994010000100101003610036100361003610036
1002410035750619863251001010010100108878414969551003510035860238740100101002020020100354111100211091010010100006064034133994010000100101003610036100361003610036
10024100357501899863251001010010100108878404969551003510035860238740100101002020020100354111100211091010010100000064034133994010000100101003610036100361003610036
10024100357506198632510010100101001088784149695510035100358602387401001010020200201003541111002110910100101000045064034133994010000100101003610036100361008210036
1002410035750619863251001010010100108878414969551003510035860238740100101018920020100354111100211091010010100211215064034133994010000100101003610036100361003610036
1002410035750619863251001010010100108878414969551003510035860238740100101002020020100354111100211091010010100000064034133994010000100101003610036100361003610036
1002410035750939863251001010010100108878414969551003510035860238740100101002020020100354111100211091010010100000064034133994010000100101003610036100361003610036

Test 3: Latency 1->3

Code:

  add w0, w1, w0, sxtw
  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)033f4d51schedule 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)accdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
102041003575619877251010010100101008866404969551003510035858038722101001020020200100354111102011009910010100100000071013711994110000101001003610036100361003610036
1020410035752379877251010010100101008866404969551003510035858038722101001020020200100354111102011009910010100100000071013711994110000101001003610036100361003610036
102041003575619877251010010100101008866404969551003510035858038722101001020020200100354111102011009910010100100002438071013711994110000101001003610036100361003610036
102041003575619877251010010100101008866404969551003510035858038722101001020020200100354111102011009910010100100000071013711994110000101001003610036100361003610036
102041003575619877251010010100101008866404969551003510035858038722101001020020200100354111102011009910010100100000071013711994110000101001003610036100361003610036
102041003575619877251010010100101008866404969551003510035858038722101001020020200100354111102011009910010100100000071013711994110000101001003610036100361003610036
102041003575619877251010010100101008866404969551003510035858038722101001020020200100354111102011009910010100100030071013711994110000101001003610036100361003610036
1020410035752739877251010010100101008866404969551003510035858038722101001020020200100354111102011009910010100100000071013711994110000101001003610036100361003610036
102041003575619877251010010100101008866414969551003510035858038722101001020020200100354111102011009910010100100000071013711994110000101001003610036100361003610036
1020410035752529877251010010100101008866414969551003510035858038722101001020020200100354111102011009910010100100000071013711994110000101001003610036100361003610036

1000 unrolls and 10 iterations

Result (median cycles for code): 1.0035

retire uop (01)cycle (02)03091e3f4d51schedule 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
1002410035750061986325100101001010010887844969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036
10024100357509619863251001010010100108878449695510035100358602387401001010020200201003541111002110910100101001564024122994010000100101003610036100361003610036
10024100357600880986325100101001010010887844969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036
1002410035750061986325100101001010010887844969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036
1002410035750061986325100101001010010887844969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036
1002410035750061986325100101001010010887844969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036
1002410035750061986325100101001010010887844969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036
10024100357500164986325100101001010010887844969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036
1002410035750061986325100101001010010887844969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036
10024100357500531986325100101001010010887844969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036

Test 4: throughput

Count: 8

Code:

  add w0, w8, w9, sxtw
  add w1, w8, w9, sxtw
  add w2, w8, w9, sxtw
  add w3, w8, w9, sxtw
  add w4, w8, w9, sxtw
  add w5, w8, w9, sxtw
  add w6, w8, w9, sxtw
  add w7, w8, w9, sxtw
  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 data (0b)1e3f51schedule 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
80204134191001001632580100801008010040050049103061338613386332333341801008020016020013386391180201100991008010010000005110319221338380000801001338713387133871338713387
8020413386100000352580100801008010040050049103061338613386332333341801008020016020013386391180201100991008010010000005110219221338380000801001338713387133871338713387
8020413386100000402580100801008010040050049103061338613386332333341801008020016020013386391180201100991008010010000005110219221338380000801001338713387133871338713387
8020413386101000352580100801008010040050049103061338613386332333341801008020016020013386391180201100991008010010000005110219221338380000801001338713387133871338713387
8020413386100000352580100801008010040050049103061338613386332333341801008020016020013386391180201100991008010010000105110219221338380000801001338713387133871338713387
80204133861010001002580100801008010040050049103061338613386332333341801008020016020013386391180201100991008010010000005110219221338380000801001338713387133871338713387
8020413386100000352580100801008010040050049103061338613386332333341801008020016020013386391180201100991008010010000105110219221338380000801001338713387133871338713387
8020413386100000352580100801008010040050049103061338613386332333341801008020016020013386391180201100991008010010000005110219221338380000801001338713387133871338713387
80204133861000004032580100801008010040050049103061338613386332333341801008020016020013386391180201100991008010010000035110219221338380000801001338713387133871338713387
80204133861010004732580100801008010040050049103061338613386332333341801008020016020013386391180201100991008010010000005111219221338380000801001338713387133871338713387

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)031e3f51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)5f6061696a6d6emap 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)a9accfd0d2d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
8002413377100039225800108001080010400050000491029113371133713330333488001080020160020133713911800211091080010104003502100619321336880000800101337213372133721337213372
800241337110003525800108001080010400050000491029113371133713330333488001080020160020133713911800211091080010100000502100619531336880000800101337213372133721337213372
800241337110003525800108001080010400050000491029113371133713330333488001080020160020133713911800211091080010100100502100319531336880000800101337213372133721337213372
800241337110003525800108001080010400050010491029113371133713330333488001080020160020133713911800211091080010100003502100619231336880000800101337213372133721337213372
8002413371100039025800108001080010400050010491029113371133713330333488001080020160020133713911800211091080010100100502100319531336880000800101337213372133721337213372
8002413371100042525800108001080010400050000491029113371133713330333488001080020160020133713911800211091080010100000502100219241336880000800101337213372133721337213372
8002413371100045125800108001080010400050010491029113371133713330333488001080020160020133713911800211091080010100000502100519321336880000800101337213372133721337213372
800241337110003525800108001080010400050000491029113371133713330333488001080020160020133713911800211091080010100000502200319321336880000800101337213372133721337213372
800241337110003525800108001080010400050000491029113371133713330333488001080020160020133713911800211091080010100000502100219231731980000800101337213372133721337213372
800241337110003525800108001080010400050010491029113371133713330333488001080020160020133713911800211091080010100000502100619871336880000800101337213372133721337213372