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 (register, lsl, 32-bit)

Test 1: uops

Code:

  add w0, w0, w1, lsl #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)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 tlb miss (a1)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
100420351506110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
100420351506110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
100420351606110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
1004203515011210001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
100420351506110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
100420351506110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
100420351506110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
100420351506110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
100420351506110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
100420351506110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036

Test 2: Latency 1->2

Code:

  add w0, w0, w1, lsl #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)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
102042003515000611000019803252010020100101111849851491695520035200351847771873510111102322026420035421110201100991001010010000111720016001984520000101002003620036200362003620036
102042003515000611000019803252010020100101111849850491695520035200351842931870010100102002020020035421110201100991001010010010000710159111979120000101002003620036200362003620036
102042003515000611000019803252010020100101001853420491695520035200351842931870010100102002020020035421110201100991001010010000000710159111979120000101002003620036200362003620036
102042003515000611000019803252010020100101001853421491695520035200351842931870010100102002020020035421110201100991001010010013000710159111979120000101002003620036200362003620036
102042003515000611000019803252010020100101001853421491695520035200351842931870010100102002020020035421110201100991001010010010000710159111979120000101002003620036200362003620036
102042003515000611000019803252010020100101001853421491695520035200351842931870010100102002020020035421110201100991001010010000000710159111979120000101002003620036200362003620036
102042003515000611000019803252010020100101001853420491695520035200351842931870010100102002020020035421110201100991001010010020000710159111979120000101002003620036200362003620036
102042003515000611000019803252010020100101001853421491695520035200351842931870010100102002020020081421110201100991001010010010000710159111979120000101002003620036200362003620036
1020420035150006110000198032520100201001010018534204916955200352003518429318700101001020020200200354211102011009910010100100320000710159111979120000101002003620036200362003620036
102042003514900611000019803252010020100101001853420491695520035200351842931870010100102002020020035421110201100991001010010000000710159111979120000101002003620036200362003620036

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0035

retire uop (01)cycle (02)03l2 tlb miss data (0b)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)acc2c3cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
10024200351500006110000197432520010200101001018531014916955200352003518451318718100101002020020200354211100211091010010100123020011640263221979220000100102003620036200362003620036
10024200351500006110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000640263221979220000100102003620036200362003620036
10024200351500006110000197432520010200101001018531014916955200352003518451318718100101002020020200354211100211091010010100000640263221979220000100102003620036200362003620036
10024200351500006110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010101000640263221979220000100102003620036201272003620036
10024200351500006110000197432520010200101001018531004916955200352003518451318718100101002020020200824221100211091010010100000640263221979220000100102003620036200362003620036
10024200351490036110000197432520010200101001018531014916955200352003518451318718100101002020020200354211100211091010010100000640263221979220000100102003620036200362003620036
10024200351500006110000197432520010200101001018531014916955200352003518451318718100101002020020200354211100211091010010100000640263221979220000100102003620036200362003620036
1002420035150003611000019743252001020010100101853101491695520035200351845131871810010100202002020035421110021109101001010014400640263221979220000100102003620036200362003620036
100242003515000072610000197432520010200101001018531014916955200352003518451318718100101002020020200354211100211091010010100000640263221979220000100102003620036200362003620036
10024200351500006110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000640263221979220000100102003620036200362003620036

Test 3: Latency 1->3

Code:

  add w0, w1, w0, lsl #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)031f3f4c4d51schedule 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 cache writeback (a8)accdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)ea? int retires (ef)f5f6f7f8fd
10204200351500611000019803252010020100101001853424916955200352003518429318700101001020020200200354211102011009910010100100007207103592219791200000101002003620036200362003620036
1020420035150061100001980325201002010010100185342491695520035200351842931870010100102002020020035421110201100991001010010002007102592219791200000101002003620036200362003620036
102042003515006110000198032520100201001010018534249169552003520035184293187001010010200202002003542111020110099100101001000010507102592219791200000101002003620036200362003620036
1020420035150061100001980325201002010010100185342491695520035200351842931870010100102002020020035421110201100991001010010000007102592219791200000101002003620036200362003620036
10204200351500611000019803252010020100101001853424916955200352003518429318700101001020020200200354211102011009910010100100009307102592219791200000101002003620036200362003620036
1020420035150061100001980325201002010010100185342491695520035200351842931870010100102002020020080422110201100991001010010000017102592219791200000101002003620036200362003620036
1020420035150061100001980325201002010010100185342491695520035200351842931870010100102002020020035421110201100991001010010000007102592219791200000101002003620036200362003620036
1020420035150061100001980325201002010010100185342491695520035200351842931870010100102002020020035421110201100991001010010000007102592219791200000101002003620036200362003620036
102042003515006110000198032520100201001010018534249169552003520035184293187001010010200202002003542111020110099100101001000012007102592219791200000101002003620036200362003620036
10204200351500611000019803252010020100101001853424916955200352003518429318700101001020020200200354211102011009910010100100006307102592219791200000101002022120036200362003620036

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0035

retire uop (01)cycle (02)03mmu table walk data (08)181e3f4c4d51schedule 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
100242003515000061100001974325200102001010010185310049169552003520035184513187181001010020200202003542111002110910100101000640363221979220000100102003620036201262003620036
100242003515000061100001974325200102001010010185310149169552003520035184513187181001010188200202003542111002110910100101000640263221979220000100102003620036200362003620036
100242003515000061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362006920036
100242003515000061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
100242003515000061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
100242003514900061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362021720036
1002420035150000611000019743252001020010100101853100491695520035200351845131871810010100202002020035421110021109101001010099640263221979220000100102003620036200362003620036
100242003515000061100001974325200102001010010185310049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
100242003515000061100001974325200102001010010185310049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
1002420035150000441100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036

Test 4: throughput

Count: 8

Code:

  add w0, w8, w9, lsl #17
  add w1, w8, w9, lsl #17
  add w2, w8, w9, lsl #17
  add w3, w8, w9, lsl #17
  add w4, w8, w9, lsl #17
  add w5, w8, w9, lsl #17
  add w6, w8, w9, lsl #17
  add w7, w8, w9, lsl #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)030918191e3f4c4d51schedule 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 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
802042673220100006180000260942516010016010080100164318492364526725267251661531667780100802001602002672539118020110099100801001000000051102221126717160000801002672626726267262672626726
802042672520000006180000260942516010016010080100164318492364526725267251661531667780100802001602002672539118020110099100801001000000051101221126717160000801002672626962267262672626726
802042672520001206180000260942516010016010080100164318492364526725267251661531667780100802001602002678939218020110099100801001000000051101221126717160000801002672626726267262672626726
802042672520000006180000260942516010016010080100164318492364526725267251661531667780100802001602002672539118020110099100801001000000051101221126717160000801002672626726267262672626726
802042672520000006180000260942516010016010080100164318492364526725267251661531668580100802001602002672539118020110099100801001000000051101221126717160000801002672626726267262672626726
802042672520000006180000260942516010016010080100164318492364526725267251661531667780100802001602002672539118020110099100801001000000051101221126717160000801002672626726267262672626726
802042672520000096180000260942516010016010080100164318492364526725267251661531667780100802001602002672539118020110099100801001000000051102221126717160000801002672626726267262672626726
8020426725200000055480000260942516010016010080100164318492364526725267251661531667780100802001602002672539118020110099100801001000000051101221126717160000801002672626726267262672626726
802042672520000006180000260942516010016010080100164318492364526725267251661531667780100802001602002672539118020110099100801001000000051101221126717160000801002672626726267262672626726
802042672520000006180000260942516010016010080100164318492364526725267251661531667780100802001602002672539118020110099100801001000000051101221126717160000801002672626726267262672626726

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)1e3f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)5f60696a6d6emap 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)dbddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
800242673420000618000021280251600101600108001016314200492363126711267111662331668580010800201600202671139118002110910800101000502222207426708160000800102671226712267122671226712
80024267112000011658000021280251600101600108001016314201492363126711267111662331668580012800201600202671140118002110910800101000502012201126704160000800102671226712267122671226712
8002426711200009718000021280251600101600108001016314200492363126711267111662331668580010800201600202671139118002110910800101000502012201126704160000800102671226712267122671226712
8002426711200007078000021280251600101600108001016314201492363126711267111662331668580010800201600202671139118002110910800101000502012201126704160000800102671226712267122671226712
8002426711200005108000021280251600101600108001016314201492363126711267111662331668580010800201600202671139118002110910800101000502012201126704160002800102671226712267122671226712
8002426711200005298000021280251600101600108001016314201492363126711267111662331668580010800201600202671139118002110910800101000502012201126704160000800102671226712267122671226712
8002426711200006568000021280251600101600108001016314201492363126711267111662331668580010800201600202671139118002110910800101000502012201126704160000800102671226712267122671226712
8002426711200007548000021280251600101600108001016314210492363126711267111662331668580010800201600202671139118002110910800101000502012201126704160000800102671226712267122671226712
800242671120010618000021280251600101600108001016314201492363126711267111662331668580010800201600202671139118002110910800101000502012201126704160000800102671226712267122671226712
8002426711200002768000021280251600101600108001016314201492363126711267111662331668580010800201600202671139118002110910800101000502012201126704160000800102671226712267122671226712