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, 32-bit)

Test 1: uops

Code:

  sub 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)031e1f3f4c4d51schedule 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
1004203515008210001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
10042035150011010001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
1004203516006110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
10042035150011710001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
1004203516006110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
1004203515006110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
10042035160017510001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
100420351501086110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
1004203515006110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036

Test 2: Latency 1->2

Code:

  sub 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)3a3f4c4d51schedule 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)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
10204200351500010310000198032520100201001010018534204916955200352003518429318700101001020020200200354211102011009910010100100000000710159111979120000101002003620036200362003620036
1020420035150006110000198032520100201001010018534204916955200352003518429318700101001020020200200354211102011009910010100100000000710159111979120000101002003620036200362003620036
1020420035150006110000198032520100201001010018534214916955200352003518429318700101001020020200200354211102011009910010100100000000710159111979120000101002003620036200362003620036
1020420035150006110000198032520100201001010018534204916955200352003518429318700101001020020200200354211102011009910010100100000000710159111979120000101002003620036200362003620036
1020420035150006110000198032520100201001010018534204916955200352003518429318700101001020020200200354211102011009910010100100000000710159111979120000101002003620036200362003620036
1020420035150006110000198032520100201001010018534214916955200352003518429318700101001020020200200354211102011009910010100100000000710159111979120000101002003620036200362003620036
1020420035150006110000198032520100201001010018534204916955200352003518429318700101001020020200200354211102011009910010100100000000710159111979120000101002003620036200362003620036
1020420035150006110000198032520100201001010018534204916955200352003518429318700101001020020200200354211102011009910010100100000000710159111979120000101002003620036200362003620036
1020420035150006110000198032520100201001010018534214916955200352003518429318700101001020020200200354211102011009910010100100000000710159111979120000101002003620036200362003620036
1020420035150006110000198032520100201001010018534204916955200352003518429318700101001020020200200354211102011009910010100100000000710159111979120000101002003620036200362003620036

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)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
100242003515006110000197432520010200101001018531049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
100242003515006110000197432520010200101001018531049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
100242003515006110000197432520010200101001018531049169552003520035184513187181001010020200202003542111002110910100101000640263221979220002100102003620036200362003620036
100242003515006110000197432520010200101001218531049169552003520035184513187181001010020200202003542111002110910100101000640263441979220002100102003620036200362003620036
1002420035150025110000197432520010200101001018531049169552003520035184513187181001010020200202003542111002110910100101000640263221979220002100102003620036200362003620036
10024200351501262210000197432520010200101001018531049169552003520035184513187181001010020200202003542111002110910100101000640263421979220002100102003620036200362003620036
100242003515006110000197432520010200101001018531049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
100242003515006110000197432520010200101001018531049169552003520035184513187181001010020200202003542111002110910100101000640263221979220002100102003620036200362003620036
100242003515006110000197412520012200121001018531049169552003520035184513187181001010020200202003542111002110910100101000640263221979220002100102003620036200362003620036
1002420035150076710000197432520010200101001018531049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620081

Test 3: Latency 1->3

Code:

  sub 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)03mmu table walk data (08)l2 tlb miss instruction (0a)3f4c4d51schedule 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)acbranch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
102042003515000124100001980325201002010010100185342049169552003520035184293187001010010200202002003542111020110099100101001000000710259221979120000101002003620036200362003620036
10204200351500061100001980325201002010010100185342049169552003520035184293187001010010200202002003542111020110099100101001000000710259221979120000101002003620036200362003620036
10204200351500061100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710359221979120000101002003620036200362003620036
10204200351500061100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710259221979120000101002003620036200362003620036
10204200351500061100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710259221979120000101002003620036200362003620036
10204200351500061100001980325201002010010100185342049169552003520035184293187001010110708208662003542111020110099100101001000030710259221979120000101002003620036200362003620036
10204200351500061100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710259221979120000101002003620036200362003620036
10204200351500061100001980325201002010010100185342049169552003520035184293187001010010200202002003542111020110099100101001000000710259221979120000101002003620036200362003620036
10204200351500089100001980325201002010010100185342049169552003520035184293187001010010200202002003542111020110099100101001000000710259221979120000101002003620036200362003620036
10204200351500061100001980325201002010010100185342049169552003520035184293187001010010200202002003542111020110099100101001000000710259221979120000101002003620036200362003620036

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
100242003515061100001974325200102001010010185310049169552003520035184513187181001010020200202003542111002110910100101013640363221979220000100102003620036200362003620036
1002420035150166100001974325200102001010010185310049169552003520035184513187181001010020200202003542111002110910100101010640263221979220000100102003620036200362003620036
1002420035150631100001974325200102001010010185310049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
1002420035150166100001974325200102001010010185310049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
1002420035150187100001974325200102001010010185310049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
100242003515061100001974325200102001010010185310049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
1002420035150124100001974325200102001010010185310049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
1002420035150124100001974325200102001010010185310049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
100242003515082100001974325200102001010010185310049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
100242003515061100001974325200102001010010185310049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036

Test 4: throughput

Count: 8

Code:

  sub w0, w8, w9, lsl #17
  sub w1, w8, w9, lsl #17
  sub w2, w8, w9, lsl #17
  sub w3, w8, w9, lsl #17
  sub w4, w8, w9, lsl #17
  sub w5, w8, w9, lsl #17
  sub w6, w8, w9, lsl #17
  sub 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)031e3f4c4d51schedule 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)accdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
8020426732200061800002609425160100160100801001643184923645267252672516615316677801008020016020026725391180201100991008010010000051102221126717160000801002672626726267262672626726
8020426725200061800002609425160100160100801001643184923645267252672516615316677801008020016020026725391180201100991008010010000051101221126717160000801002672626726267262672626726
80204267252000618000026094251601001601008010016431849236452672526725166153166778010080200160200267253911802011009910080100100000511012921126717160000801002672626726267262672626726
80204267252019103800002609425160100160100801001643184923645267252672516615316677801008020016020026725391180201100991008010010000051101221126717160000801002672626726267262672626726
8020426725200061800002609425160100160100801001643184923645267252672516615316677801008020016020026725391180201100991008010010000051101221126717160000801002672626726267262672626726
8020426725200061800002609425160100160100801001643184923645267252672516615316677801008020016020026725391180201100991008010010000051101221126717160000801002672626726267262672626726
8020426725200061800002609425160100160100801001643184923645267252672516615316677801008020016020026725391180201100991008010010000051101221126717160000801002672626726267262672626726
8020426725200061800002609425160100160100801001643184923645267252672516615316677801008020016020026725391180201100991008010010000051101221126717160000801002672626726267262672626726
8020426725200061800002609425160100160100801001643184923645267252672516615316677801008020016020026725391180201100991008010010000051101221126717160000801002672626726267262672626726
8020426725200061800002609425160100160100801001643184923645267252672516615316677801008020016020026725391180201100991008010010000051101221126717160000801002672626726267262672626726

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 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)a9acc2cfd0d5map dispatch bubble (d6)ddfetch restart (de)dfe0? int output thing (e9)? int retires (ef)f5f6f7f8fd
8002426717200000000011098000021280251600101600108001016314204923631267112671116623316685800108002016002026711391180021109108001010240000005022632211226704160000800102671226712267122671226712
800242671119900000001678000021280251600101600108001016314204923631267112671116623316685800108002016002026711391180021109108001010000000005022622211026704160000800102671226712267122671226712
800242671120000000001678000021280251600101600108001016314204923631267112671116623316685800108002016002026711391180021109108001010000000005022612211226704160000800102671226712267122671226712
800242671120000000001678000021280251600101600108001016314204923631267112671116623316685800108002016002026711391180021109108001010000000005022612211226704160000800102671226712267122671226712
800242671120000000001678000021280251600101600108001016314214923631267112671116623316685800108002016002026711391180021109108001010000000005022622211226704160000800102671226712267122671226712
800242671120000000001678000021280251600101600108001016314204923631267112671116623316685800108002016002026711391180021109108001010000000005022622211226704160000800102671226712267122671226712
800242671120000000001678000021280251600101600108001016314214923631267112671116623316685800108002016002026711391180021109108001010000000005022632211226704160000800102671226712267122671226712
8002426711200000000011518000021280251600101600108001016314204923631267112671116623316685800108002016002026711391180021109108001010000000005022612211226704160000800102671226712267122671226712
800242671120000000001678000021280251600101600108001016314204923631267112671116623316685800108002016002026711391180021109108001010000000005022612211226704160000800102671226712267122671226712
800242671120000000001678000021280251600101600108001016314214923631267112671116623316685800108002016002026711391180021109108001010000000005022612211226704160000800102671226712267122671226712