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 (shifted immediate, 64-bit)

Test 1: uops

Code:

  add x0, x0, #3, lsl #12
  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)6d6emap 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
100410358061862251000100010001691610351035728386810001000100010354111100110000073241339371000100010361036103610361036
1004103573061862251000100010001691610351035728386810001000100010354111100110000073341339371000100010361036103610361036
100410357061862251000100010001691610351035728386810001000100010354111100110000073241339371000100010361036103610361036
100410358961862251000100010001691610351035728386810001000100010354111100110000373341339371000100010361036103610361036
100410358061862251000100010001691610351035728386810001000100010354111100110000073341339371000100010361036103610361036
100410358061862251000100010001691610351035728386810001000100010354111100110001073341339371000100010361036103610361036
100410358061862251000100010001691610351035728386810001000100010354111100110000073341339371000100010361036103610361036
100410357061862251000100010001691610351035728386810001000100010354111100110000375341339371000100010361036103610361036
100410358061862251000100010001691610351035728386810001000100010354111100110000073341339371000100010361036103610361036
100410358061862251000100010001691610351035728386810001000100010354111100110000073341339371000100010361036103610361036

Test 2: Latency 1->2

Code:

  add x0, x0, #3, lsl #12
  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)696a6b6d6emap 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
102041003575001449877251010010100101008866449695501003510035858038722101001020010200100354111102011009910010100100071013711994110000101001003610036100361003610036
10204100357500619877251010010100101008866449695501003510035858038722101001020010200100354111102011009910010100100071013711994110000101001003610036100361003610036
1020410035750198619877251010010100101008866449695501003510035858038722101001020010200100354111102011009910010100100071013711994110000101001003610036100361003610036
10204100357500619877251010010100101008866449695501003510035858038722101001020010200100354111102011009910010100100071013711994110000101001003610036100361003610036
10204100357500619877251010010100101008866449695501003510035858038722101001020010200100354111102011009910010100100071013711994110000101001003610036100361003610036
10204100357500619877251010010100101008866449695501003510035858038722101001020010200100354111102011009910010100100071013711994110000101001003610036100361003610036
102041003575001799877251010010100101008866449695501003510035858038722101001020010200100354111102011009910010100100071013711994110000101001003610036100361003610036
10204100357500619877251010010100101008866449695501003510035858038722101001020010200100354111102011009910010100100071013711994110000101001003610036100361003610036
10204100357500619877251010010100101008866449695501003510035858038722101001020010200100354111102011009910010100100071013711994110000101001003610036100361003610036
10204100357500619877251010010100101008866449695501003510035858038722101001020010200100354111102011009910010100100071013711994110000101001003610036100361003610036

1000 unrolls and 10 iterations

Result (median cycles for code): 1.0035

retire uop (01)cycle (02)031e1f3f4d51schedule 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)a9acbranch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
1002410035750010398632510010100101001088784149695510035100358602387401001010020100201003541111002110910100101000000064024122994010000100101003610036100361003610036
100241003575006198632510010100101001088784149695510035100358602387401001010020100201003541111002110910100101000000064024122994010000100101003610036100361003610036
100241003575006198632510010100101001088784149695510035100358602387401001010020100201003541111002110910100101000000064024122994010000100101003610036100361003610036
100241003575006198632510010100101001088784049695510035100358602387401001010020100201003541111002110910100101000000064024122994010000100101003610036100361003610036
1002410035750012498632510010100101001088784149695510035100358602387401001010020100201003541111002110910100101000000064024122994010000100101003610036100361003610036
100241003575006198632510010100101001088784149695510035100358602387401001010020100201003541111002110910100101000000164024122994010000100101003610036100361003610036
100241003575006198632510010100101001088784149695510035100358602387401001010020100201003541111002110910100101000000064024122994010000100101003610036100361003610036
100241003575008298632510010100101001088784149695510035100358602387401001010020100201003541111002110910100101000000064024122994010000100101003610036100361003610036
100241003575006198632510010100101001088784049695510035100358602387401001010020100201003541111002110910100101000000064024122994010000100101003610036100361003610036
100241003576006198632510010100101001088784149695510035100358602387401001010020100201003541111002110910100101000000064024122994010000100101003610036100361003610036

Test 3: throughput

Count: 8

Code:

  add x0, x8, #3, lsl #12
  add x1, x8, #3, lsl #12
  add x2, x8, #3, lsl #12
  add x3, x8, #3, lsl #12
  add x4, x8, #3, lsl #12
  add x5, x8, #3, lsl #12
  add x6, x8, #3, lsl #12
  add x7, x8, #3, lsl #12
  mov x8, 9

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.1674

retire uop (01)cycle (02)03mmu table walk data (08)l2 tlb miss data (0b)1e1f3f51schedule 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)a9acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
80204133901000000492780136801368014840071014910310013390133903326633368014880264802641339039418020110099100801001000002225130225111339880033801001340213402134021340313403
80204134021010000643480133801338014540069514910321013402134013323933338014580262802621340139118020110099100801001000002225130125111339880033801001340213402134021340213403
80204134021010000643380133801338014540069514910321013401134013323933338014580262802621340139118020110099100801001000002225129125111339880033801001340313402134021340213402
80204134011010000282780136801368014840071014910310013390133903326633368014880264802641339039118020110099100801001000001115119016001338780164801001339113391133911339113391
80204133901000000282780136801368014840199214910310013390133903326633368014880264802641339039118020110099100801001000001115119016001338780036801001339113391133911339113391
80204133901000000282780136801368014840071014910310013390133903326633368014880264802641339039118020110099100801001000001115119016001338780036801001339113391133911339113391
80204133901000000282780136801368014840071014910310013390133903326633368014880264802641339039118020110099100801001000001115119016001338780036801001339113391133911339113391
80204133901000000282780136801368014840136814910310013390133903326633368014880264802641339039118020110099100801001000001115119016001338780036801001339113391133911339113391
80204133901000000282780136801368014840071014910310013390133903326633368014880264802641339039118020110099100801001001001115119016001338780036801001339113391133911339113391
80204133901000000282780136801368014840071014910310013390133903326633368014880264802641339039118020110099100801001000001115119016001338780036801001339113391133911339113391

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)0318191e1f3f51schedule 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)ld unit uop (a6)l1d cache writeback (a8)a9acbranch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)ea? int retires (ef)f5f6f7f8fd
80024133761000000352580010800108001040005004910291133711337133303334880010800208002013371391180021109108001010000000050214195513368800000800101337213372133721337213372
80024133711000000352580010800108001040005004910291133711337133303334880010800208002013371391180021109108001010000000050227196513368800000800101337213372133721337213372
80024133711000000352580010800108001040005004910291133711337133303334880010800208002013371391180021109108001010000000050225196613368800000800101337213372133721337213372
80024133711000000352580010800108001040005004910291133711337133303334880010800208002013371391180021109108001010000000050214196613368800000800101337213372133721337213372
800241337110000004182580010800108001040005004910291133711337133303334880010800208002013371391180021109108001010000000050215196713368800000800101337213372133721337213372
80024133711000000772580010800108001040005004910291133711337133303334880010800208002013371391180021109108001010000000050225195613368800000800101337213372133721337213372
80024133711000000352580010800108001040005004910291133711337133303334880010800208002013371391180021109108001010000000050215195513368800000800101337213372133721337213372
80024133711000000352580010800108001040005004910291133711337133303334880010800208002013371391180021109108001010000000050226196513368800000800101337213372133721337213372
80024133711000000352580010800108001040005004910291133711337133303334880010800208002013371391180021109108001010000000050226195513368800000800101337213372133721337213372
80024133711000090352580010800108001040005004910291133711337133303334880010800208002013371391180021109108001010000000050215195513368800000800101337213372133721337213372