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 (uxtx, 64-bit)

Test 1: uops

Code:

  add x0, x0, x1, uxtx
  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
1004103580618622510001000100016916110351035728386810001000200010354111100110000073141119371000100010361036103610361036
1004103580618622510001000100016916110351035728386810001000200010354111100110000073141119371000100010361036103610361036
10041035812618622510001000100016916110351035728386810001000200010354111100110000073141119371000100010361036103610361036
1004103583618622510001000100016916110351035728386810001000200010354111100110000073141119371000100010361036103610361036
1004103580618622510001000100016916110351035728386810001000200010354111100110000073141119371000100010361036103610361036
1004103570618622510001000100016916110351035728386810001000200010354111100110000073141119371000100010361036103610361036
1004103570618622510001000100016916110351035728386810001000200010354111100110000073141119371000100010361036103610361036
1004103570618622510001000100016916110351035728386810001000200010354111100110000073141119371000100010361036103610361036
1004103570618622510001000100016916110351035728386810001000200010354111100110000073141119371000100010361036103610361036
1004103570618622510001000100016916110351035728386810001000200010354111100110004073141119371000100010361036103610361036

Test 2: Latency 1->2

Code:

  add x0, x0, x1, uxtx
  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)0309181e3f4d51schedule 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)acbranch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
1020410035750006198772510100101001010088664496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
10204100357510061987725101001010010100886644969551003510035858038722101001020020200100354111102011009910010100100042071013711994110000101001003610036100361003610036
1020410035750006198772510100101001010088664496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
1020410035760006198772510100101001010088664496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
1020410035750006198772510100101001010088664496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
10204100357500126198772510100101001010088664496955100351003585803872210100102002020010035411110201100991001010010003071013711994110000101001003610036100361003610036
10204100357500016698774610100101001010088664497003100351003585803872210100102002020010035411110201100991001010010000071013711994110036101001008310036100361003610082
1020410035750208298772510100101001010088664496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
1020410035750006198772510100101001010088664496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
1020410035750006198772510100101001010088664496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036

1000 unrolls and 10 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)9fl1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
1002410035751039863251001010010100108878414969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036
100241003575619872251001010010100108878414969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036
100241003575619863251001010010100108878414969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036
100241003576619863251001010010100108878404969551003510035860238740100101002020020100354111100211091010010105664024122994010000100101003610036100361003610036
100241003575619863251001010010100108878404969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036
100241003575619863251001010010100108878404969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036
100241003575619863251001010010100108878404969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036
100241003576829863251001010010100108878404969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036
100241003575619863251001010010100108878404969551003510035860238740100101002020020100354111100211091010010100064024122994010000100101003610036100361003610036
1002410035768298632510010100101001088784049695510035100358602387401001010020200201003541111002110910100101016064024122994010000100101003610036100361003610036

Test 3: Latency 1->3

Code:

  add x0, x1, x0, uxtx
  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)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)acbranch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
1020410035750168987725101001010010100886640496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
102041003575061987725101001010010100886640496955100351003585803872210269102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
102041003575061987725101001010010100886641496955100351003585803872210100102002020010035411110201100991001010010000071013711998210000101001003610036100361003610036
102041003575084987725101001010010100886641496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
102041003575061987725101001010010100886640496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
102041003575061987725101001010010100886640496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
1020410035750619877251010010100101008866414969551003510035858038722101001020020200100354111102011009910010100100110071013711994110000101001003610036100361003610036
10204100357501139987725101001010010100886640496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
1020410035750105987725101001010010100886640496955100351003585803874810100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
102041003575061987725101001010010100886640496955100351003585803872210100102002020010035411110201100991001010010060071013711994110000101001003610036100361003610036

1000 unrolls and 10 iterations

Result (median cycles for code): 1.0035

retire uop (01)cycle (02)03mmu table walk data (08)18191e1f3f4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)6061696a6d6emap 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)a9acc2cfd0d2d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
10024100357500000343986325100101001010010887841649695510035100358602387401001010020200201003541111002110910100101000006406334133994010000100101003610036100361003610036
100241003575000002519863251001010010100108878400496955100351003586023874010010100202002010035411110021109101001010130006406334133994010000100101003610036100361003610036
1002410035750000061986325100101001010010887841649695510035100358602387401001010020200201003541111002110910100101000006406334133994010000100101003610036100361003610036
1002410035750000061986325100101001010010887841649695510035100358602387401001010020200201003541111002110910100101000006406334133994010000100101003610036100361003610036
1002410035750000010409863251001010010100108878416496955100351003586023874010010100202002010035411110021109101001010110006406334133994010000100101003610036100361003610036
10024100357500000105986325100101001010010887841649695510035100358602387401001010020200201003541111002110910100101010006406534133994010000100101003610036100361003610036
1002410035760000061986325100101001010010887841649695510035100358602387401001010020200201003541111002110910100101000006406534133994010000100101003610036100361003610036
1002410035750000061986325100101001010010887841649695510035100358602387401001010020200201003541111002110910100101000006406534133994010000100101003610036100361003610036
1002410035750000061986325100101001010010887841649695510035100358602387401001010020200201003541111002110910100101000006406534133994010000100101003610036100361003610036
10024100357500051061986325100101001010010887841649695510035100358602387401001010020200201003541111002110910100101000006406534133994010000100101003610036100361003610036

Test 4: throughput

Count: 8

Code:

  add x0, x8, x9, uxtx
  add x1, x8, x9, uxtx
  add x2, x8, x9, uxtx
  add x3, x8, x9, uxtx
  add x4, x8, x9, uxtx
  add x5, x8, x9, uxtx
  add x6, x8, x9, uxtx
  add x7, x8, x9, uxtx
  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)9fl1d cache writeback (a8)acbranch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
80204134181000772580100801008010040050004910306133861338633233334180100802001602001338639118020110099100801001000005110219111338380000801001338713387133871338713392
80204133861010352580100801008010040050004910306133861338633233334180100802001602001338639118020110099100801001000305110119111338380000801001338713387133871338713392
80204133861000352580125801008010040050004910306133861338633233334180100802001602001338639118020110099100801001000005110119151338380000801001338713387133871338713387
80204133861000372580100801008010040050004910306133861338633233334180100802001602001338639118020110099100801001000005110119111338380000801001338713387133871338713392
802041339110006152580100801008010040050004910306133861338633233334180100802001602001338639118020110099100801001000005110119111338380000801001338713387134721338713387
80204133861000352580100801008010040050004910306133861338633233334180100802001602001338639118020110099100801001000005110119111338380000801001338713387133871338713387
80204133861000352580100801258010040050004910306133861338633263334680100802001602001338639118020110099100801001000005110119011338380000801001338713387133871338713387
80204133861010352580100801008010040050004910306133861338633233334180100802001602001339140118020110099100801001000005110119111338880000801001339213387133871338713387
80204133911000352580100801258010040050004910306133861338633233334680100802001602001339139118020110099100801001000305111119111338380000801001338713387133871338713387
80204133861010352580100803648010040050004910306133861338633233334180100802001602001338639118020110099100801001000005110119441338880000801001338713387133871338713387

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)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)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
800241338710000792580010800108001040005014910291133711337133303334880010800201600201337139118002110910800101005023131813121336880000800101337213372133721337213372
800241337110000352580010800108001040005014910291133711337133303334880010800201600201337139118002110910800101005023132914151336880000800101337213372133721337213372
800241337110000352580010800108001040005014910291133711337133303334880010800201600201337139118002110910800101005022162712151336880000800101337213372133721337213372
800241337110000352580010800108001040005014910291133711337133303334880010800201600201337139118002110910800101005022131913161336880000800101337213372133721337213372
800241337110000352580010800108001040005014910291133711337133303334880010800201600201337139118002110910800101005023152415151336880000800101337213372133721337213372
8002413371101002832580010800108001040005014910291133711337133307336780010800201600201337139118002110910800101005022101914141336880000800101337213372133721337213372
80024133711000108352580010800108001040005014910291133711337133303334880010800201600201337139118002110910800101025023131915121336880000800101337213372133721337213372
800241337110000352580010800108001040005014910291133711337133303334880010800201600201337139118002110910800101005022152015121336880000800101337213372133721337213372
800241337110000352580010800108001040005014910291133711337133303334880010800201600201337139118002110910800101005022132414131336880000800101337213372133721337213372
800241337110000352580010800108001040005014910291133711337133303334880010800201600201337139118002110910800101005023172412121336880000800101337213372133721337213372