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

SUB (register, lsl, 64-bit)

Test 1: uops

Code:

  sub x0, x0, x1, 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)03l2 tlb miss data (0b)1e3f4c4d51schedule 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
1004203515006110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
1004203515006110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
1004203515006110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
10042035160027810001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620722036
1004203518006110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
10042035190010510001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
1004203516006110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
1004203515006110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
1004203516006110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
10042035150012810001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036

Test 2: Latency 1->2

Code:

  sub x0, x0, x1, 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)0318191e1f3f4c4d51schedule 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)accdcfd0d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
10204200351500000611000019803252010020100101001853420491695520035200351842931870010100102002020020035421110201100991001010010000007100159111979120000101002003620036200362003620036
10204200351500000611000019803252010020100101001853420491695520035200351842931870010100102002020020035421110201100991001010010000007400159111979120000101002003620036200362003620036
10204200351500000611000019803252010020100101001853421491695520035200351842931870010100102002020020035421110201100991001010010007007100159111979120000101002003620036200362003620036
1020420035150000010541000019803252010020100101001853420491695520035200351842931870010100102002020020035421110201100991001010010000007100159111979120000101002003620036200362003620036
102042003515000009111000019803252010020100101001853421491695520035200351842931870010100102002020020035421110201100991001010010000007320159111979120000101002003620036200362003620036
10204200351500000611000019803252010020100101001853421491695520035200351842931870010100102002020020035421110201100991001010010000007100159111979120000101002003620036200362003620036
10204200351500000611000019803252010020100101001853420491695520035200351842931870010100102002020020035421110201100991001010010000007100159111979120000101002003620036200362003620036
102042003515000008731000019803252010020100101001853421491695520035200351842931870010100102002020020035421110201100991001010010000007100159111979120000101002003620036200362003620036
10204200351500000611000019803252010020100101001853421491695520035200351842931870010100102002020020035421110201100991001010010000007100159111979120000101002003620036200362003620036
10204200351500000611000019803252010020100101001853421491695520035200351842931870010100102002020020035421110201100991001010010000007100159111979120000101002003620036200362003620036

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)9faccfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
10024200351506110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100640263221979220000100102003620036200362003620036
10024200351506110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100640263221979220000100102003620036200362003620036
10024200351506110000197432520010200101001018531014916955200352003518451318718100101002020020200354211100211091010010100640263221979220000100102003620036200362003620036
10024200351506110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100640263221979220000100102003620036200362003620036
10024200351506110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100640263221979220000100102003620036200362003620036
100242003515013910000197432520010200101001018531014916955200352003518451318718100101002020020200354211100211091010010100640263221979220000100102003620036200362003620036
10024200351506110000197432520010200101001018531014916955200352003518451318718100101002020020200354211100211091010010100640263221979220000100102003620036200362003620036
10024200351506110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100640263221979220000100102003620036200362003620036
10024200351506110000197432520010200101001018531014916955200352003518451318718100101002020020200354211100211091010010100640263221979220000100102003620036200362003620036
10024200351558210000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100640263221979220000100102003620036200362003620036

Test 3: Latency 1->3

Code:

  sub x0, x1, x0, 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)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)st unit uop (a7)l1d cache writeback (a8)a9acc2branch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
102042003515000000008210000198032520100201001010018534214916955200352003518429318700101001020020200200354211102011009910010100100000000000710159111979120000101002003620036200362003620036
102042003515000000006110000198032520100201001010018534204916955200352003518429318700101001020020200200354211102011009910010100100000000000710159111979120000101002003620036200362003620036
102042003515000000006110000198032520100201001010018534204916955200352003518429318700101001020020200200354211102011009910010100100000000000710159111979120000101002003620036200362003620036
102042003515000000006110000198032520100201001010018534204916955200352003518429318700101001020020200200354211102011009910010100100000000000710159111979120000101002003620036200362003620036
102042003515000000006110000198032520100201001010018534204916955200352003518429318700101001020020200200354211102011009910010100100000000000710159111979120000101002003620036200362003620036
102042003515000000006110000198032520100201001010018534204916955200352003518429318700101001020020200200354211102011009910010100100000000000710159111979120000101002003620036200362003620036
102042003515000000006110000198032520100201001010018534204916955200352003518429318700101001020020200200354211102011009910010100100000000300710159111979120000101002003620036200362003620077
1020420035150000000034610000198032520100201001010018534204916955200352003518429318700101001020020200200354211102011009910010100100000000000710159111979120000101002003620036200362003620036
102042003515000000006110000198032520100201001010018534204916955200352003518429318700101001020020200200354211102011009910010100100000000000710159111979120000101002003620036200362003620036
10204200351500000000104210000198032520100201001010018534204916955200352003518429318700101001020020200200354211102011009910010100100000000000710159111979120000101002003620036200362003620036

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0035

retire uop (01)cycle (02)03mmu table walk data (08)09l2 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)a9acc2branch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
10024200351500000000061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000000000640463341979220000100102003620036200362003620036
10024200351500000030061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000000000640463341979220000100102003620036200362003620036
10024200351500000000061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000000000640463441979220000100102003620036200362003620036
10024200351500000000061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000010196300640463321979220000100102003620036200362003620126
10024200351500000000061100001974325200102001010010185310149169552003520035184513187181001010020200202008042111002110910100101000010000640463441979220000100102003620036200362003620036
10024200351500000000061100001974325200102001010010185310149169552003520035184513187181001010020200202008042111002110910100101000010196800640463441979220000100102003620036200362003620036
10024200351500000000061100001974325200102001010010185310149169552003520035184517187341001010020200202003542111002110910100101000000000640363341979220000100102003620036200362003620171
10024200351500000000061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101020000000640363451979220000100102003620036200362003620036
10024200351500000000061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000000000640463441979220000100102003620036200362003620036
100242003514900000000105100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000000000640463441979220000100102003620036200362003620081

Test 4: throughput

Count: 8

Code:

  sub x0, x8, x9, lsl #17
  sub x1, x8, x9, lsl #17
  sub x2, x8, x9, lsl #17
  sub x3, x8, x9, lsl #17
  sub x4, x8, x9, lsl #17
  sub x5, x8, x9, lsl #17
  sub x6, x8, x9, lsl #17
  sub x7, x8, x9, 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)03l2 tlb miss data (0b)1e1f3f4c4d51schedule 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)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
80204267482000006180000260942516010016010080100164318049236452672526725166153166778010080200160200267253911802011009910080100100051102221126717160000801002672626726267262672626726
802042672520000021080000260942516010016029980100164318049236452672526725166153166778010080200160200267253911802011009910080100100051101221126717160000801002672627046267862679126789
80204267252030156104192800002609425160100160100801001643180492364526725267251661512166778010180418161088267853921802011009910080100100051101221126717160000801002672626726267262672626726
80204267252000006180000260942516010016010080100164318049236452672526725166153166778010080200160200267253911802011009910080100100051101221126717160000801002672626726267262672626726
80204267252000006180000260942516010016010080100164318049236452672526725166153166778010080200160200267253911802011009910080100100051101221126717160000801002672626726267262672626726
80204267252010006180000260942516010016010080100164318149236452672526725166153166778010080200160200267253911802011009910080100100051101221126717160000801002672626726267262672626726
80204267252000006180000260942516010016010080100164318149236452672526725166153166778010080200160200267253911802011009910080100100051102221126717160000801002672626726267262672626726
80204267252000006180000260942516010016010080100164318149236452672526725166153166778010080200160200267253911802011009910080100100051101221126717160000801002672626726267262672626726
80204267252000006180000260942516010016010080100164318049236452672526725166153166778010080200160200267253911802011009910080100100051101221126717160000801002672626726267262672626726
80204267252000006180000260942516010016010080100164318049236452672526725166153166778010080200160200267903911802011009910080100100051101221126717160000801002672626726267262672626726

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)181e3f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)696a6d6emap stall dispatch (70)int prf full (71)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)a9acc2cfd5map dispatch bubble (d6)daddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
8002426734200000006180000212802516001016001080010163142492363126711267111662303166858001080020160020267113911800211091080010100000502012201126704160000800102671226712267122671226712
80024267112000003061800002128025160010160010800101631424923631267112671116623034166858001080020160020267113911800211091080010100030502012211126704160000800102671226712267122671226712
8002426711200000006180000212802516001016001080010163142492363126711267111662303166858001080020160020267113911800211091080010100000502012201126704160000800102671226712267122671226712
8002426711200000096180000212802516001016001080010163142492363126711267111662303166858001080020160020267113911800211091080010100000502012201126704160000800102671226712267122671226712
8002426711200000006180000212802516001016001080010163142492363126711267111662303166858001080020160020267113911800211091080010100000502012201126704160000800102671226712267122671226712
8002426711200000006180000212802516001016001080010163142492363126711267111662303166858001080020160020267113911800211091080010100000502012201126704160000800102671226712267122671226712
8002426711200000006180000212802516001016001080010163142492363126711267111662303166858001080020160020267113911800211091080010100000502012201126704160000800102671226712267122671226712
8002426711200000006180000212802516001016001080010163142492363126711267111662303166858001080020160020267113911800211091080010100000502012201126704160000800102671226712267122671226712
8002426711200000008480000212802516001016038780010163142492363126711267111662303166858001080020160020267113911800211091080010100000502012201126704160000800102671226712267122671226712
8002426711200000006180000212802516001016001080010163142492363126711267111662303166858001080020160020267113911800211091080010100000502012201126704160000800102671226712267122671226712