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

EON (register, ror, 64-bit)

Test 1: uops

Code:

  eon x0, x0, x1, ror #17
  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)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
1004203516061100017352520002000100032570020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
1004203515061100017352520002000100032570020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
1004203516061100017352520002000100032570120352035157531842100010002000203542111001100000731671117812000100020362036203620362036
10042035151261100017352520002000100032570120352035157531842100010002000203542111001100000731671117812000100020362036203620362036
1004203516061100017352520002000100032570120352035157531842100010002000203542111001100000731671117812000100020362036203620362036
1004203516061100017352520002000100032570120352035157531842100010002000203542111001100009731671117812000100020362036203620362036
10042035160611000173525200020001000325701203520351575318421000100020002035421110011000012731671117812000100020362036203620362036
1004203516061100017352520002000100032570120352035157531842100010002000203542111001100000731671117812000100020362036203620362036
1004203516061100017642520002000100032570020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
1004203516061100017352520002000100032570020352035157531842100010002000203542111001100000731671117812000100020362036203620362036

Test 2: Latency 1->2

Code:

  eon x0, x0, x1, ror #17
  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)03191e1f3f4c4d51schedule 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)a9acc2branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
1020420035155036061100001980325201002010010111184985049169552003520035184777187351011110232202642003542111020110099100101001000000111720016001984520000101002003620036200362003620036
102042017315500061100001980325201002010010558184985149169552003520035184777187351011110232202642003542111020110099100101001002000111719016001984520000101002003620036200362003620036
10204200351500339061100001980325201002010010111184985049169552003520035184827187351011110232202642003542111020110099100101001000000111720016001984520000101002003620036200362003620036
102042003515500061100001980325201002010010111184985149169552003520035184777187351011110232202642003542111020110099100101001000000111720016001984520000101002003620036200362003620036
102042003515500061100001980325201002010010111184985049169552003520035184777187361011110232202642003542111020110099100101001000000111720016001984420000101002003620036200362003620036
102042003515501328861100001980325201002010010111184985049169552003520035184777187351011110403206002008042211020110099100101001000220432111720016001984520000101002003620036200362003620036
102042003515500061100001980325201002010010111184985149169552003520035184777187351011110232202642003542111020110099100101001000000111720016001984520000101002003620036200362003620036
102042003515500061100001980325201002010010111184985149169552003520171184777187351011110232202642003542111020110099100101001000000111720016001984520000101002003620036200362003620036
102042003515500061100001980325201002010010111184985049169552003520035184777187351011110232202642003542111020110099100101001000000111720016001984520000101002003620036200362003620036
102042003515500061100001980325201002010010111184985049169552003520035184777187351011110232202642003542111020110099100101001000000111720016001984420000101002003620036200362003620036

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0035

retire uop (01)cycle (02)033f4c4d51schedule 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
100242003515061100001974325200102001010010185310049169552003520035184513187181001010020200202003542111002110910100101016640263221979220000100102003620036200362003620036
100242003515061100001974325200102001010010185310049169552003520035184513187181001010020200202003542111002110910100101010640263221979220000100102003620036200362003620036
100242003515061100001974325200102001010010185310049169552003520035184513187181001010020200202003542111002110910100101020640263221979220000100102003620036200362003620036
10024200351504434100001974325200102001010010185310049169552003520035184517187181001010020200202003542111002110910100101033640263221979220000100102003620036200362003620036
10024200351506110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100213640263221979220000100102003620036200362003620036
100242003515061100001974325200102001010010185310049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
100242003515061100001974325200102001010010185310049169552003520035184513187181001010020200202003542111002110910100101060640263221979220000100102003620036200362003620036
100242003515061100001974325200102001010010185310049169552003520035184513187181001010020200202003542111002110910100101003640263221979220000100102003620036200362003620036
100242003515061100001974325200102001010010185310049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
100242003515061100001974325200102001010010185310049169552003520035184513187181001010020200202003542111002110910100101023640263221979220000100102003620036200362003620036

Test 3: Latency 1->3

Code:

  eon x0, x1, x0, ror #17
  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)03mmu table walk data (08)191e3f4c4d51schedule 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
10204200351550006110000198032520100201001010018534214916955200352003518429318700101001020020200200354211102011009910010100100000710159111979120000101002003620036200362003620036
10204200351550006110000198032520100201001010018534214916955200352003518429318700101001020020200200354211102011009910010100100000710159111979120000101002003620036200362003620036
10204200351550006110000198032520100201001010018534214916955200352003518429318700101001020020200200354211102011009910010100100000710159111979120000101002003620036200362003620036
102042003515500015610000198032520100201001010018534214916955200352003518429318700101001020020200200354211102011009910010100100000710159111979120000101002003620036200362003620036
10204200351550006110000198032520100201001010018534214916955200352003518429318700101001020020200200354211102011009910010100100000710159111979120000101002003620036200362003620036
10204200351551006110000198032520100201001010018534214916955200352003518429318700101001020020200200354211102011009910010100100000710159111979120000101002003620036200362003620036
102042003515500126110000198032520100201001010018534214916955200352003518429318700101001020020200200354211102011009910010100100000710159111979120000101002003620036200362003620036
102042003515500126110000198032520100201001010018534214916955200352003518429318700101001020020200200354211102011009910010100100000710159111979120000101002003620036200362003620036
10204200351560008210000198032520100201001010018534214916955200352003518429318700101001020020200200354211102011009910010100100000710159111979120000101002003620036200362003620036
102042003515500010310000198032520100201001010018534204916955200352003518429318700101001020020200200354211102011009910010100100000710159111979120000101002003620036200362003620036

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0035

retire uop (01)cycle (02)03mmu table walk data (08)18191e1f3a3f4c4d51schedule 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)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
100242003515500000010310000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000000640263231979220000100102003620036200362003620036
100242003515600000011710000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000000640163221979220000100102003620036200362003620036
10024200351550000006110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000000640263231979220000100102003620036200362003620036
10024200351550000006110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000000640263221979220000100102003620036200362003620036
10024200351560000006110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000000640263221979220000100102003620036200362003620036
10024200351560000008410000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000000640263221979220000100102003620036200362003620036
10024200351550000006110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000000640263221979220000100102003620036200362003620036
10024200351550000006110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000000640263221979220000100102003620036200362003620036
10024200351550000006110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000000640263221979220000100102003620036200362003620036
10024200351560000008210000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000000640263221979220000100102003620036200362003620036

Test 4: throughput

Count: 8

Code:

  eon x0, x8, x9, ror #17
  eon x1, x8, x9, ror #17
  eon x2, x8, x9, ror #17
  eon x3, x8, x9, ror #17
  eon x4, x8, x9, ror #17
  eon x5, x8, x9, ror #17
  eon x6, x8, x9, ror #17
  eon x7, x8, x9, ror #17
  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)03l1i tlb fill (04)1e3f4c4d51schedule 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 cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
80204267512071028800312614628160182160182802621619060492365226732267321665181666180262803761605522673239118020110099100801001000011151290160026729160082801002673326733267332673326733
802042673220800288003126146281601821601828026216190614923652267322673216651816661802628037616055226791395180201100991008010010052311151290160026729160082801002673326733267332673326733
802042673220700618000026094251601001601008010016431804923645267252672516615316677801008020016020026725391180201100991008010010055000051101221126717160000801002672626726267262672626726
802042672520701261800002609425160100160100801001643181492364526725267251661531667780100802001602002672539118020110099100801001000000051101221126717160000801002672626726267262672626726
8020426725207006180000260942516010016010080100164318049236452672526725166153166778010080200160200267253911802011009910080100100011700051101221126717160000801002672626726267262672626726
80204267252070061800002609425160100160100801001643180492364526725267251661531667780100802001602002672539118020110099100801001000000051101221126717160000801002672626726267262672626964
80204267252070061800002609425160100160100801001643180492364526786267251661531667780100802001602002672539118020110099100801001000000051101221126717160000801002672626726267262672626726
80204267252070061800002609425160100160100801001643181492364526725267251661531667780100802001602002672539118020110099100801001000000051101221126717160000801002672626726267262672626726
80204267252070089800002609425160100160100801001643181492364526725267251661531667780100802001602002672539118020110099100801001000000051101221126717160000801002672626726267262672626726
80204267252070061800002609425160100160100801001643181492364526725267251661531667780100802001602002672539118020110099100801001000000051101221126717160000801002672626726267262672626726

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)030918191e1f3f4c4d51schedule 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)acc2cfd5map dispatch bubble (d6)d9daddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
800242671820700000161800002128025160010160010800101631424923631267112671116623316685800108002016002026711391180021109108001010000005020122001126704160000800102671226712267122671226712
800242671120700000778800002128025160010160010800101631424923631267112671116623316685800108002016002026711391180021109108001010000005020122001126704160000800102671226712267122671226712
80024267112070010076800002128025160010160010800101631424923631267112671116623316685800108002016002026711391180021109108001010000005020122001126704160000800102671226712267122671226712
800242671120700000113800002128025160010160010800101631424923631267112671116623316685800108002016002026711391180021109108001010000005020122001126704160000800102671226712267122671226712
800242671120700000126800002128025160010160010800101631424923631267112671116623316685800108002016002026711391180021109108001010000005020122001126704160000800102671226712267122671226712
80024267112070000061800002128047160010160010800101631424923631267112671116623316685800108002016002026711391180021109108001010000005020122001126704160000800102671226712267122671226712
80024267112070000061800002128025160010160010800101631424923631267112671116623316685800108002016002026711391180021109108001010000005020122001126704160000800102671226712267122671226712
80024267112070000061800002128025160010160010800101631424923631267112671116623316685800108002016002026711391180021109108001010000005020122001126704160000800102671226712267122671226712
80024267112070000061800002128025160010160010800101631424923631267112671116623316685800108002016002026711391180021109108001010000005020122001126704160000800102671226712267122671226712
80024267112070000061800002128025160010160010800101631424923631267112671116623316685800108002016002026711391180021109108001010000005020122001126704160000800102671226712267122671226712