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, 64-bit)

Test 1: uops

Code:

  add x0, x0, 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)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 tlb access (a0)ld unit uop (a6)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
100420351506110001735252000200010003257002035203515753184210001000200020354211100110000000731671117812000100020362036203620362036
100420351506110001735252000200010003257002035203515753184210001000200020354211100110000000731671117812000100020362036203620362036
100420351536110001735252000200010003257012035203515753184210001000200020354211100110003000731671117812000100020362036203620362036
100420351606110001735252000200010003257002035203515753184210001000200020354211100110000000731671117812000100020362036203620362036
100420351506110001735252000200010003257012035203515753184210001000200020354211100110000000731671117812000100020362036203620362036
100420351506110001735252000200010003257012035203515753184210001000200020354211100110000000731671117812000100020362036203620362036
100420351506110001735252000200010003257012035203515753184210001000200020354211100110000000731671117812000100020362036203620362036
100420351536110001735252000200010003257002035203515753184210001000200020354211100110000000731671117812000100020362036203620362036
100420351506110001735252000200010003257002035203515753184210001000200020354211100110000030731671117812000100020362036203620362036
10042035151266110001735252000200010003257012035203515753184210001000200020354211100110000000731671117812000100020362036203620362036

Test 2: Latency 1->2

Code:

  add x0, x0, 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)03mmu table walk data (08)l2 tlb miss data (0b)1e3f4c4d51schedule 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)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
1020420035150000611000019803252010020100101001853424916955200352003518429318700101001020020200200354211102011009910010100100000710159111979120000101002003620036200362003620036
1020420035150000821000019803252010020100101001853424916955200352003518429318700101001020020200200354211102011009910010100100002710159111979120000101002003620036200362003620036
10204200351500007561000019803252010020100101001853424916955200352003518429318700101001020020200200354211102011009910010100100000710159111979120000101002003620036200362003620036
10204200351500006931000019803252010020100101001853424916955200352003518429318700101001020020200200354211102011009910010100100000710159111979120000101002003620036200362003620036
1020420035150000611000019803252010020100101001853424916955200352003518429318700101001020020200200354211102011009910010100100000710159111979120000101002003620036200362003620036
1020420035150000611000019803252010020100101001853424916955200352003518429318700101001020020200200354211102011009910010100100000710159111979120000101002003620036200362003620036
10204200351500006551000019803252010020100101001853424916955200352003518429318700101001020020200200354211102011009910010100100000710159111979120000101002003620036200362003620036
1020420125151110611000919752252010020100101001853424916955200352003518429318700101001020020200200354211102011009910010100100000710159111979120000101002003620036200362003620036
1020420035150000841000019803252010020100101001853424916955200352003518429318700101001020020200200354211102011009910010100100000710159111979120000101002003620036200362003620036
1020420035150000611000019803252010020100101001853424916955200352003518429318700101001020020200200354211102011009910010100100000710159111979120000101002003620036200362003620036

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0035

retire uop (01)cycle (02)03091e3f4c4d51schedule 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)acbranch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
1002420035150006110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000640463341979220000100102003620036200362003620036
1002420035150006110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000640463341979220000100102003620036200362003620036
10024200351500012410000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000640463431979220000100102003620036200362003620036
1002420035150006110000197432520010200101001018531014916955200352003518451318718100101002020020200354211100211091010010100000640463441979220000100102003620036200362003620036
10024200351500059510000197432520010200101001018531014916955200352003518451318718100101002020020200354211100211091010010100000640363431979220000100102003620036200362003620036
1002420035150006110000197432520010200101001018531014916955200352003518451318718100101002020020200354211100211091010010100000640463341979220000100102003620036200362003620036
10024200351500076410000197432520010200101001018531014916955200352003518451318718100101002020020200354211100211091010010100000640463341979220000100102003620036200362003620036
1002420035149008410000197432520010200101016618531014916955200352003518451318718100101002020020200354211100211091010010100000640463341979220000100102003620036200362003620036
1002420035150006110090198192520010202571175920086514916955200352003518451318718100101002020020200354211100211091010010100000640463341979220000100102003620036200362003620036
10024200351500063910000197432520010200101001018531014916955200352003518451318718100101002020020200354211100211091010010100000640463431979220000100102003620036200362003620036

Test 3: Latency 1->3

Code:

  add x0, x1, 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)03l1i tlb fill (04)09191e1f3f4c4d51schedule 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 miss (a1)l1d cache writeback (a8)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
10204200351501000061100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500000061100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500000061100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
102042003515000000251100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
102042003516000000838100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500000061100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500000061100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500000061100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
102042003515000000852100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500000061100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0035

retire uop (01)cycle (02)03mmu table walk instruction (07)09l2 tlb miss instruction (0a)l2 tlb miss data (0b)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
10024200351500000000006110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000000640363221979220000100102003620036200362003620036
10024200351500000000008210000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000000640263221979220000100102003620036200362003620036
100242003515000000012006110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000000640263221979220000100102003620036200362003620036
10024200351500000000006110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000000640263221979220000100102003620036200362003620036
10024200351500000000006110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000004640263221979220000100102003620036200362003620036
10024200351500000000006110000197432520010200101001018531004916955200782003518451318718100101002020020200354211100211091010010100000000640263221979220000100102003620036200362003620036
10024200351500000000006110000197432520010200101001018531014916955200352003518451318718100101002020020200354211100211091010010100000000640263221979220000100102003620036200362003620036
10024200351490000000006110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000000640263221979220000100102003620036200362003620036
10024200351500000000006110000197432520010200101001018531014916955200352003518451318718100101002020020200354211100211091010010100000000640263221979220000100102003620036200362003620036
100242003515000000000056410000197432520010200101001018531014916955200352003518451318718100101002020020200354211100211091010010100000000640263221979220000100102003620036200362003620036

Test 4: throughput

Count: 8

Code:

  add x0, x8, w9, sxtb
  add x1, x8, w9, sxtb
  add x2, x8, w9, sxtb
  add x3, x8, w9, sxtb
  add x4, x8, w9, sxtb
  add x5, x8, w9, sxtb
  add x6, x8, w9, sxtb
  add x7, x8, 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)03mmu table walk data (08)l2 tlb miss data (0b)18191e1f3f4c4d51schedule 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)9fld unit uop (a6)l1d cache writeback (a8)acc2cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
80204267712000000006180000260942516010016010080100164318492370626725267251661531667780100802001602002672539118020110099100801001000000051103222226717160000801002672626726267262672626726
80204267252000000006180000260942516010016010080100164318492364526725267251661531667780100802001602002672539118020110099100801001000000051102222226717160000801002672626726267262672626726
80204267252000000006180000260942516010016010080100164318492364526725267251661531667780100802001602002672539118020110099100801001000000051102222226717160000801002672626726267262672626726
80204267252000000006180000260942516010016010080100164318492364526725267251661531667780100802001602002672539118020110099100801001000000051102222226717160000801002672626726267262672626726
80204267252000000006180000260942516010016010080100164318492364526725267251661531667780100802001602002672539118020110099100801001000000051102222226717160000801002672626726267262672626726
80204267252000000006180000260942516010016010080100164318492364526725267251661531667780100802001602002672539118020110099100801001000000051102222226717160000801002672626726267262672626726
80204267252000000006180000260942516010016010080100164318492364526725267251661531667780100802001602002672539118020110099100801001000000051102222226717160000801002672626726267262672626726
80204267252000000006180000260942516010016010080100164318492364526725267251661531667780100802001602002672539118020110099100801001000000051102222226717160000801002672626726267262672626726
80204267252000000006180000260942516010016010080100164318492364526725267251661531667780100802001602002672539118020110099100801001000000051102222226717160000801002672626726267262679126726
80204267252000000006180000260942516010016010080100164318492364526725267251661531667780100802001602002672539118020110099100801001000000051102222226717160000801002672626726267262672626726

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03mmu table walk data (08)09l2 tlb miss instruction (0a)l2 tlb miss data (0b)18191e1f3a3f4c4d51schedule 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 tlb access (a0)l1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)a9acc2cfd0d2d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
800242673420000000000061800002128025160010160010800101631420049236312671126711166233166858001080020160020267113911800211091080010100000000503530152217726704160000800102671226712267122671226712
800242671120000000000061800002128025160010160010800101631420149236312671126711166233166858001080020160020267113911800211091080010100000000503100172217626704160000800102671226712267122671226712
8002426711200000000900618000021280251600101600108001016314201492363126711267111662331668580010800201600202671139118002110910800101000000005032001722171726704160000800102671226712267122671226712
800242671120000000000061800002128025160010160010800101631420149236312671126711166233166858001080020160020267113911800211091080010100000030503200822171726704160000800102671226712267122671226712
800242671120000000000061800002128025160010160010800101631420049236312671126711166233166858001080020160020267113911800211091080010100000000503000722171726767160000800102671226712267122671226712
8002426711200000000000251800002128025160010160010800101631420149236312671126711166233166858001080020160020267113911800211091080010100000000503000162216526704160000800102671226712267122671226712
800242671120000000000061800002128025160010160010800101631420149236312671126711166233166858001080020160020267113911800211091080010100000000503000162216726704160000800102671226712267122671226712
800242671120000000000061800002128025160010160010800101631420049236312671126711166233166858001080020160020267113911800211091080010100000000503030142216726704160000800102671226712267122671226712
80024267112000000000006180000212802516001016001080010163142014923631267112671116623316685800108002016002026711391180021109108001010000000050300062216626704160000800102671226712267122671226768
800242671120000000000061800002128025160010160010800101631420049236312671126711166233166858001080020160020267113911800211091080010100000000503000162251626704160000800102671226712267122671226712