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 (sxtb, 32-bit)

Test 1: uops

Code:

  add w0, w0, w1, sxtb
  mov x0, 1
  mov x1, 2

(no loop instructions)

1000 unrolls and 1 iteration

Retires: 1.000

Issues: 2.000

Integer unit issues: 2.000

Load/store unit issues: 0.000

SIMD/FP unit issues: 0.000

retire uop (01)cycle (02)031e3f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)60616d6emap 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)acc2cfd0d2d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
100420351715611000173525200020001145325700020352035157531842100010002000203542111001100000073001671117812000100020362036203620362036
100420351802171000173525200020001000325700020352035157531842100010002000203542111001100000073001671117812000100020362036203620362036
1004203517114611000173525200020001000325701020352035157531842100010002000203542111001100000073001671117812000100020362036203620362036
100420351806110001735252000200010003257010203520351575318421000100020002035421110011000048073001671117812000100020362036203620362036
100420351830611000173525200020001000325701020352035157531842100010002000203542111001100000073001671117812000100020362082203620362036
10042035170611000173525200020001000325700020352035157531842100010002000203542111001100000073001671117812000100020362036203620362036
10042035180611000173525200020001000325700020352035157531842100010002000203542111001100000073001671117812000100020362036203620362036
10042035160611000173525200020001000325701020352035157531842100010002000203542111001100000073001671117812000100020362036203620362036
10042035160611000173525200020001000325700020352035157531842100010002000203542111001100000073001671117812000100020362036203620362036
10042035160611000173525200020001000325700020352035157531842100010002000203542111001100000073001751117812000100020362036203620362036

Test 2: Latency 1->2

Code:

  add w0, w0, w1, sxtb
  mov x0, 1
  mov x1, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 2.0035

retire uop (01)cycle (02)031e3a3f4c4d51schedule 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
1020420035150006110000198032520100201001010018534214916955020035200351843331870010100102002020020035421110201100991001010010000710159111979120000101002003620036200362003620036
10204200351500061100001980325201002010010100185342149169550200352003518429318700101001020020200200354211102011009910010100100224710159111979120000101002003620036200362003620036
10204200351503010510000198032520100201001010018534214916955020035200351842931870010100102002020020035421110201100991001010010000710159111979120000101002003620036200362003620036
1020420035150006110000198032520100201001010018534204916955020035200351842931870010100102002020020035421110201100991001010010000710159111979120000101002003620036200362003620036
102042003515016206110000198032520100201001010018534204916955020035200351842931870010100102002020020035421110201100991001010010000710159111979120000101002003620036200362003620036
10204200351500012610000198032520100201001010018534204916955020035200351842931870010100102002020020035421110201100991001010010000710159111979120000101002003620036200362003620036
1020420035150006110000198032520100201001010018534204916955020035200351842931870010100102002020020035421110201100991001010010000710159111979120000101002003620036200362003620036
1020420035150006110000198032520100201001010018534204916955020035200351842931870010100102002020020035421110201100991001010010000710159111979120000101002003620036200362003620036
1020420035150006110000198032520100201001010018534204916955020035200351842931870010100102002020020035421110201100991001010010000710159111979120000101002003620036200362003620036
10204200351500016810000198032520100201001010018534204916955020035200351842931870010100102002020020035421110201100991001010010000710159111979120000101002003620036200362003620036

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0035

retire uop (01)cycle (02)033a3f4c4d51schedule 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)9faccfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
100242003515001261000019743252001020010100101853104916955200352003518451318718100101002020020200354211100211091010010100640263221979220000100102003620036200362003620036
10024200351500611000019743252001020010100101853104916955200352003518451318718100101002020020200354211100211091010010100640263221979220000100102003620036200362003620036
10024200351500611000019743252001020010100101853104916955200352003518451318718100101002020020200354211100211091010010100640263221979220000100102003620036200362003620036
10024200351500611000019743252001020010100101853104916955200352003518451318718100101002020020200354211100211091010010100640263321979220000100102003620036200362003620036
100242003515006021000019743252001020010100101853104916955200352003518451318718100101002020020200354211100211091010010100640263321979220000100102003620036200362003620036
10024200351500611000019743252001020010100101853104916955200352003518451318718100101002020020200354211100211091010010100640263321979220000100102003620036200362003620036
10024200351500821000019743252001020010100101853104916955200352003518451318718100101002020020200354211100211091010010100640263321979220000100102003620036200362003620036
10024200351500611000019743252001020010100101853104916955200352003518451318718100101002020020200354211100211091010010100640263221979220000100102003620036200362003620036
10024200351500611000019743252001020010100101853104916955200352003518451318718100101002020020200354211100211091010010100640263221979220000100102003620036200362003620036
10024200351500611000019743252001020010100101853104916955200352003518451318718100101002020020200354211100211091010010100640263321979220000100102003620036200362003620036

Test 3: Latency 1->3

Code:

  add w0, w1, w0, sxtb
  mov x0, 1
  mov x1, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 2.0035

retire uop (01)cycle (02)031e1f3f4c4d51schedule 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 cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
102042003515000189100001980325201002010010100185342049169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500061100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500061100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500061100001980325201002010010100185342049169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500061100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
102042003515000149100001980325201002010010100185342049169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500061100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500089100001980325201002010010100185342049169552003520035184293187001010010200202002003542111020110099100101001000100710159111979120000101002003620036200362003620036
10204200351490082100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
102042003515000229100001980325201002010010100185342049169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0035

retire uop (01)cycle (02)03l2 tlb miss instruction (0a)l2 tlb miss data (0b)18191e1f3f4c4d51schedule 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)a9acc2cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
1002420035150000000145100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000000000640363441979220000100102003620036200362003620036
10024200351500000002870100001974325200102003210010185310049169552003520035184513187181001010020200202003542111002110910100101000000000640363341979220000100102003620036200362003620036
100242003515000000082100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000000000640363341979220000100102003620036200362003620036
1002420035150000000509100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000000000640363341979220000100102003620036200362003620036
100242003515000000061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000000000640463441979220000100102003620036200362003620036
100242003515000003061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000000000640463431979220000100102003620036200362003620036
100242003515000000061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000000000640463441979220000100102003620036200362003620036
100242003515000000061100001974325200102001010010185310049169552003520035184513187181001010020200202003542111002110910100101000000000640463441979220000100102003620036200362003620036
1002420035150000000214100001974325200102001010010185310049169552003520035184513187181001010020200202003542111002110910100101000000000640463341979220000100102003620036200362003620036
100242003515000000061100001974325200102001010010185310049169552003520035184513187181001010020200202003542111002110910100101000000000640363341979220000100102007720036200362003620036

Test 4: throughput

Count: 8

Code:

  add w0, w8, w9, sxtb
  add w1, w8, w9, sxtb
  add w2, w8, w9, sxtb
  add w3, w8, w9, sxtb
  add w4, w8, w9, sxtb
  add w5, w8, w9, sxtb
  add w6, w8, w9, sxtb
  add w7, w8, w9, sxtb
  mov x8, 9
  mov x9, 10

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.3341

retire uop (01)cycle (02)031e3f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)67696a6d6emap 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
8020426767200014328000026094251601001601008010016431804923645267252672516615316677801008020016098426725391180201100991008010010000051102222226717160000801002672626726267262672626726
80204267252000618000026094251601001601008010016431804923645267252672516615316677801008020016020026725391180201100991008010010000051101221126717160000801002672626726267262672626726
80204267252000618000026094251601001601008010016431804923645267252672516615316677801008020016020026725391180201100991008010010000051101221126717160000801002672626726267262672626726
80204267252000618000026094251601001601008010016431804923645267252672516615316677801008020016020026725391180201100991008010010000051101222126717160000801002672626726267262672626726
802042672520001248000026094251601001601008010016431804923645267252672516615316677801008020016020026725391180201100991008010010090051101222226717160000801002672626726267262672626726
802042672520001058000026094251601001601008010016431804923645267252672516615316677801008020016020026725391180201100991008010010000051101222126717160000801002672626726267262672626726
80204267252000618000026094251601001601008010016431804923645267252672516615316677801008020016020026725391180201100991008010010000051101222126717160000801002672626726267262672626726
80204267252000618000026094251601001601008010016431804923645267252672516615316677801008020016020026725391180201100991008010010000051101221126717160000801002672626726267262672626726
802042672520005488000026094251601001601008010016431804923645267252672516615316677801008020016020026725391180201100991008010010000051101221126717160000801002672626726267262672626726
80204267252000828000026094251601001601008010016431804923645267252672516615316677801008020016020026725391180201100991008010010000051101221126717160000801002672626726267262672626726

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.3339

retire uop (01)cycle (02)03l2 tlb miss data (0b)18191e1f3f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)5f6067696a6d6emap 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)acbranch mispred nonspec (cb)cfd5map dispatch bubble (d6)d9daddfetch restart (de)e0? int output thing (e9)eb? int retires (ef)f5f6f7f8fd
8002426735200000003108000021280251600101600108001016314200049236312671126711166233166858001080020160020267113911800211091080010100000050201224011267041600000800102671226712267122671226712
800242671120000000618000021280251600101600108001016314200049236312671126711166233166858001080020160020267113911800211091080010100000050201220011267041600000800102671226712267122671226712
800242671120000000618000021280251600101600108001016314200049236312671126711166233166858001080020160020267113911800211091080010100000050201220011267041600000800102671226712267122671226712
800242671119900000618000021280251600101600108001016314200049236312671126711166233166858001080020160020267113911800211091080010100000050201220011267041600000800102671226712267122671226712
800242671120000000618000021280251600101600108001016314200049236312671126711166233166858001080020160020267113911800211091080010100000050201220011267041600000800102671226712267122671226712
800242671120000000618000021280251600101600108001016314201049236312671126711166233166858001080020160020267113911800211091080010100000050201220011267041600000800102671226712267122671226712
800242671120000000618000021280251600101600108001016314200049236312671126711166233166858001080020160020267113911800211091080010100000050201220011267041600000800102671226712267122671226712
800242671120000000618000021280251600101600108001016314200049236312671126711166233166858001080020160020267113911800211091080010100000050201220011267041600000800102671226712267122671226712
800242671120000000618000021280251600101600108001016314200049236312671126711166233166858001080020160020267113911800211091080010100000050201220011267041600000800102671226712267122671226712
800242671120000000618000021280251600101600108001016314200049236312671126711166233166858001080020160020267113911800211091080010100003050201220011267041600000800102671226712267122671226712