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 (sxth, 32-bit)

Test 1: uops

Code:

  add w0, w0, w1, sxth
  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)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)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
10042035161561100017352520002000100032570203520351575318421000100020002035421110011000000731671117812000100020362036203620362036
1004203515061100017352520002000100032570203520351575318421000100020002035421110011000000731671117812000100020362036203620362036
1004203515061100017352520002000100032570203520351575318421000100020002035421110011000000731671117812000100020362036203620362036
1004203515061100017352520002000100032570203520351575318421000100020002035421110011000000731671117812000100020362036203620362036
1004203515061100017352520002000100032570203520351575318421000100020002035421110011000000731671117812000100020362036203620362036
10042035152161100017352520002000100032570203520351575318421000100020002035421110011000000731671117812000100020362036203620362036
1004203515061100017352520002000100032570203520351575318421000100020002035421110011000000731671117812000100020362036203620362036
1004203515061100017352520002000100032570203520351575318421000100020002035421110011000000731671117812000100020362036203620362036
1004203515061100017352520002000100032570203520351575318421000100020002035421110011000000731671117812000100020362036203620362036
1004203515361100017352520002000100032570203520351575318421000100020002035421110011000000731671117812000100020362036203620362036

Test 2: Latency 1->2

Code:

  add w0, w0, w1, sxth
  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)l2 tlb miss data (0b)181e3f4c4d51schedule 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
1020420035150000061100001980325201002010010100185342491695520035200351842931870010100102002020020035421110201100991001010010016710259221979120000101002003620036200362003620036
1020420035150000061100001980325201002010010100185342491695520035200351842931870010100102002020020035421110201100991001010010000710259221979120000101002003620036200362003620036
1020420035150000061100001980325201002010010100185342491695520035200351842931870010100102002020020035421110201100991001010010000710259221979120000101002003620036200362003620036
1020420035150000061100001980325201002010010100185342491695520035200351842931870010100102002020020035421110201100991001010010000710259221979120000101002003620036200362003620036
10204200351500000156100001980325201002010010100185342491695520035200351842931870010100102002020020035421110201100991001010010000710259221979120000101002003620036200362003620036
1020420035150010061100001980325201002010010100185342491695520035200351842931870010100102002020020035421110201100991001010010000710259221979120000101002003620036200362003620036
1020420035150000061100001980325201002010010100185342491695520035200351842931870010100102002020020035421110201100991001010010000710259221979120000101002003620036200362003620036
1020420035150000061100001980325201002010010100185342491695520035200351842931870010100102002020020035421110201100991001010010000710259221979120000101002003620036200362003620036
1020420035150000061100001980325201002010010100185342491695520035200351842931870010100102002020020035421110201100991001010010000710259221979120000101002003620036200362003620036
1020420035150000061100001980325201002010010100185342491695520035200351842931870010100102002020020035421110201100991001010010000710259221979120000101002003620036201752003620036

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0035

retire uop (01)cycle (02)03mmu table walk data (08)l2 tlb miss data (0b)18191e3f4c4d51schedule 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
10024200351500000061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640363221979220000100102003620036200362003620036
10024200351500000061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
10024200351500000061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101010640263221979220000100102003620036200362003620036
10024200351500000061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101010640263221979220000100102003620036200362003620036
10024200351500000082100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
10024200351500000061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101010640263221979220000100102003620036200362003620036
100242003515000000726100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
10024200351500000061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
10024200351500000061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
100242003515000000611000019743252001020010100101853101491695520035200351845131871810010100202002020035421110021109101001010018640263221979220000100102003620036200362003620036

Test 3: Latency 1->3

Code:

  add w0, w1, w0, sxth
  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)09181e3f4c4d51schedule 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)9fld unit uop (a6)l1d cache writeback (a8)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
10204200351500000611000019803252010020100101001853421491695502003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
102042003515000006110000198032520100201001010018534214916955020035200351842931870010100102002020020035421110201100991001010010000150710159111979120000101002003620036200362003620036
10204200351500000611000019803252010020100101001853421491695502003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500000611000019803252010020100101001853421491695502003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500000611000019803252010020100101001853421491695502003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500000611000019803252010020100101001853421491695502003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500000611000019803252010020100101001853421491695502003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500000611000019803252010020100101001853421491695502003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500000611000019803252010020100101001853421491695502003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500000611000019803252010020100101001853421491695502003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0035

retire uop (01)cycle (02)031e3f4c4d51schedule 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
1002420035150061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640363221979220000100102003620036200362003620036
1002420035150061100001974325200102001010010185310049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
10024200351500128100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
1002420035150061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101002120640263221979220000100102003620036200362003620036
10024200351500232100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
1002420035150061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
1002420035150061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
1002420035150061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
1002420035150061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
1002420035150061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036

Test 4: throughput

Count: 8

Code:

  add w0, w8, w9, sxth
  add w1, w8, w9, sxth
  add w2, w8, w9, sxth
  add w3, w8, w9, sxth
  add w4, w8, w9, sxth
  add w5, w8, w9, sxth
  add w6, w8, w9, sxth
  add w7, w8, w9, sxth
  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)03mmu table walk instruction (07)l2 tlb miss instruction (0a)1e3a3f4c4d51schedule 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)acc2branch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
802042676920011037180000260942516010016010080100164318492364526725267251661531667780100802001602002672539118020110099100801001000000511810229926717160000801002672626726267262672626726
80204267252001103718000026094251601001601008010016431849236452672526725166153166778010080200160200267253911802011009910080100100000051169229926717160000801002672626726267262672626726
80204267252001103718000026094251601001601008010016431849236452672526725166153166778010080200160200267253911802011009910080100100000051169229926717160000801002672626726267262672626726
80204267252011103718000026094251601001601008010016431849236452672526725166153166778010080200160200267253911802011009910080100100000051165229926717160000801002672626726267262672626726
80204267252001103718000026094251601001601008010016431849236452672526725166153166778010080200160200267253911802011009910080100100000051169229926717160000801002672626726267262672626726
802042672520011031668000026094251601001601008010016431849236452672526725166153166778010080200160200267253911802011009910080100100000051169224926717160000801002672626726267262672626726
80204267252001103718000026094251601001601008010016431849236452672526725166153166778010080200160200267253911802011009910080100100000051169229926717160000801002672626726267262672626726
80204267252001103718000026094251601001601008010016431849236452672526725166153166778010080200160200267253911802011009910080100100000051169229926717160000801002672626726267262672626726
80204267252001103718000026094251601001601008010016431849236452672526725166153166778010080200160200267253911802011009910080100100000051169229426717160000801002672626726267262672626726
8020426725200111713718000026094251601001601008010016431849236452672526725166153166778010080200160200267253911802011009910080100100000051169229926717160000801002672626726267262672626726

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03mmu table walk instruction (07)mmu table walk data (08)09l2 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)6067696a6d6emap 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)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
8002426734200000000000618000021280251600101600108001016314200492363126711267111662331668580010800201600202671139118002110910800101000000050204224326704160000800102671226712267122671226712
8002426711200000000000618000021280251600101600108001016314200492363126711267111662331668580010800201600202671139118002110910800101000000050206224326704160000800102671226712267122671226712
8002426711220000000100618000021280251600101600108001016314200492363126711267111662331668580010800201600202671139118002210910800101000013050206224626704160000800102671226712267122671226712
8002426711200000000000618000021280251600101600108001016314200492363126711267111662331668580010800201600202671139118002110910800101000000050204224326704160000800102671226712267122671226712
8002426711200000000000618000021280251600101600108001016314200492363126711267111662331668580010800201600202671139118002110910800101000000050443223426704160000800102671226712267122671226712
80024267112000000000002858000021280251600101600108001016314210492363126711267111662331668580010800201600202671139118002110910800101000000050204226726704160000800102671226712267122671226712
80024267112000000000606180000212802516001016001080010163142104923631267112671116623316685800108002016002026711391180021109108001010000012050207224726704160000800102671226712267122671226712
8002426711200000000000618000021280251600101600108001016314200492363126711267111662331668580010800201600202671139118002110910800101000000050207224326704160000800102671226712267122671226712
8002426711200000000000618000021280251600101600108001016314200492363126711267111662331668580010800201600202671139118002110910800101000000050206224726704160000800102671226712267122671226712
8002426711200000000000618000021280251600101600108001016314210492363126711267111662331668580010800201600202671139118002110910800101000000051187224426704160000800102671226712267122671226712