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, asr, 64-bit)

Test 1: uops

Code:

  add x0, x0, x1, asr #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 cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
100420351596110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
100420351606110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
100420351506110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
100420351506110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
100420351508210001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
100420351506110001735252000200010003257020352035157531842100010002000203542111001100010731671117812000100020362036203620362036
100420351506110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
1004203515015610001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
100420351506110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036
100420351506110001735252000200010003257020352035157531842100010002000203542111001100000731671117812000100020362036203620362036

Test 2: Latency 1->2

Code:

  add x0, x0, x1, asr #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)033f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)61696a6d6emap 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)9fcfd0d2d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
10204200351506110000198032520100201001010018534204916955200352003518429318700101001020020200200354211102011009910010100100710010259221979120000101002003620036200362003620036
10204200351506110000198032520100201001010018534204916955200352003518429318700101001020020200200354211102011009910010100100710010259221979120000101002003620036200362003620036
1020420035150611000019803252010020100101001853420491695520035200351842931870010100102002020020035421110201100991001010010071000259221979120000101002003620036200362003620036
10204200351506110000198032520100201001010018534204916955200352003518429318700101001020020200200354211102011009910010100100710010259221979120000101002003620036200362003620036
10204200351506110000198032520100201001010018534204916955200352003518429318700101001020020200200354211102011009910010100100710010259221979120000101002003620036200362003620036
1020420035150821000019803252010020100101001853420491695520035200351842931870010100102002020020035421110201100991001010010071000259221979120000101002003620036200362003620036
10204200351506110000198032520100201001010018534214491695520035200351842931870010100102002020020035421110201100991001010010071000259221979120000101002003620036200362003620036
10204200351508210000198032520100201001010018534204916955200352003518429318700101001020020200200354211102011009910010100100710010259221979120000101002003620036200362003620036
102042003515010310000198032520100201001010018534204916955200352003518429318700101001020020200200354211102011009910010100100710010259221979120000101002003620036200362003620036
10204200351501031000019803252010020100101001853420491695520035200351842931870010100102002020020035421110201100991001010010071000259221979120000101002003620036200362003620036

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)branch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
1002420035150576110000197432520010200101001018690949169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
100242003515008210000197432520010200101001018531049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
100242003515006110000197432520010200101001018531049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
100242003515036110000197432520010200101001018531049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
100242003515006110000197432520010200101001018531049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102008220036200822003620036
100242003515006110000197432520010200101001018531049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
100242003515006110000197432520010200101001018531049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
100242003515006110000197432520010200101001018531049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
100242003515006110000197432520010200101001018623049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
100242003515008210000197432520010200101001018531049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036

Test 3: Latency 1->3

Code:

  add x0, x1, x0, asr #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)033f4c4d51schedule 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)9fbranch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
102042003515028110000198032520100201001010018534249169552003520035184293187001010010200202002003542111020110099100101001000710159111979120000101002003620036200362003620036
10204200351506110000198032520100201001010018534249169552003520035184293187001010010200202002003542111020110099100101001000710159111979120000101002003620036200362003620036
10204200351506110000198032520100201001010018534249169552003520035184293187001010010200202002003542111020110099100101001000710159111979120000101002003620036200362003620036
10204200351506110000198032520100201001010018534249169552003520035184293187001010010200202002003542111020110099100101001000710159111979120000101002003620036200362003620036
10204200351506110000198032520100201001010018534249169552003520035184293187001010010200202002003542111020110099100101001000710159111979120000101002003620036200362003620036
102042003515094310000198032520100201001010018534249169552003520035184293187001010010200202002003542111020110099100101001000710159111979120000101002003620036200362003620036
10204200351506110000198032520100201001010018534249169552003520035184293187001010010200202002003542111020110099100101001000710159111979120000101002003620036200362003620036
10204200351508210000198032520100201001010018534249169552003520035184293187001010010200202002003542111020110099100101001000710159111979120000101002003620036200362003620036
10204200351506110000198032520100201001010018534249169552003520035184293187001010010200202002003542111020110099100101001000710159111979120000101002003620036200362003620036
10204200351506110000198032520100201001010018534249169552003520035184293187001010010200202002003542111020110099100101001000710159111979120000101002003620036200362003620036

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
100242003515006110000197432520010200101001018531049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
100242003515006110000197432520010200101001018531049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
100242003515006110000197432520010200101001018531049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
1002420035150010310000197432520010200101001018531049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
100242003515106110000197432520010200101001018531049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
10024200351491446110000197432520010200101001018531049169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036
100242003515006110000197432520010200101001018531049169552003520035184513187181001010020200202003542111002110910100101003640263221979220000100102003620036200362003620036
1002420035149042410009197462520034200101001018878549169552003520035184513187181001010020200202003542111002110910100101000640263221979220000100102003620036200362003620036

Test 4: throughput

Count: 8

Code:

  add x0, x8, x9, asr #17
  add x1, x8, x9, asr #17
  add x2, x8, x9, asr #17
  add x3, x8, x9, asr #17
  add x4, x8, x9, asr #17
  add x5, x8, x9, asr #17
  add x6, x8, x9, asr #17
  add x7, x8, x9, asr #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)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)9fl1d cache writeback (a8)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
8020426769200061800002609425160100160100801001643180492364502672526725166153166778010080200160200267253911802011009910080100100051102221126717160000801002672626726267262672626726
8020426725200061800002609425160100160100801001643181492364502672526725166153166778010080200160200267253911802011009910080100100051101221126717160000801002672626726267262672626726
8020426725200061800002609425160100160100801001643181492364502672526725166153166778010080200160200267253911802011009910080100100051101221126717160000801002672626726267262672626726
8020426725200061800002609425160100160100801001643180492364502672526725166153166778010080200160200267253911802011009910080100100051101221126717160000801002672626726267262672626726
8020426725200061800002609425160100160100801001643180492364502672526725166153166778010080200160200267253911802011009910080100100051101221226717160000801002672626726267262672626726
8020426725200061800002609425160100160100801001643181492364502672526725166153166778010080200160200267253911802011009910080100100051101221126717160000801002672626726267262672626726
8020426725201061800002609425160100160100801001643181492364502672526725166153166778010080200160200267253911802011009910080100100051101221126717160000801002672626726267262672626726
8020426725200061800002609425160100160100801001643181492364502672526725166153166778010080200160200267253911802011009910080100100051101221126717160000801002672626726267262672626726
8020426725200061800002609425160100160100801001643181492364502672526725166153166778010080200160200267253911802011009910080100100051101221126717160000801002672626726267262672626726
8020426725200061800002609425160100160100801001643181492364532672526725166153166778010080200160200267253911802011009910080100100051101221126717160000801002672626726267262672626726

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)l2 tlb miss instruction (0a)18191e1f3f4c4d51schedule 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)l1d cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)dfe0? int output thing (e9)? int retires (ef)f5f6f7f8fd
8002426792200000000618000021280251600101600108001016314200492363126711267111662331668580010800201600202671139118002110910800101000000502432235226704160000800102671226712267122671226712
8002426711200000000618000021280251600101600108001016314200492363126711267111662331668580010800201600202671139118002110910800101000000502452255226704160000800102671226712267122671226712
8002426711200000000618000021280251600101600108001016314200492363126711267111662331668580010800201600202671139118002110910800101000000502452255226704160000800102671226712267122671226712
8002426711200000000618000021280251600101600108001016314200492363126711267111662331668580010800201604522671139118002110910800101000000502432235226704160000800102671226712267122671226712
8002426711202000000618000021280251600101600108001016314200492363126711267111662331668580010800201600202671139118002110910800101000000502452235226704160000800102671226712267122671226712
8002426711200000000618000021280251600101600108001016314200492363126711267111662331668580010800201600202671139118002110910800101000000502442255226704160000800102671226712267122671226712
8002426711200000000618000021280251600101600108001016314200492363126711267111662331668580010800201600202671139118002110910800101000000502652253226704160000800102671226712267122671226712
8002426711200000000618000021280251600101600108001016314200492363126711267111662331668580010800201600202671139118002110910800101000000502452253226704160000800102671226712267682671226712
800242671120000000061800002128025160010160010800101631420049236892671126711166233166858001080020160020267113911800211091080010100010741502432274226704160000800102671226712267122671226712
8002426711200000000618000021280251600101600108001016314200492363126711267111662331668580010800201600202671139118002110910800101000000502472235226704160000800102671226712267122671226712