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

MVN (register, ror, 32-bit)

Test 1: uops

Code:

  mvn w0, w0, ror #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)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 cache writeback (a8)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
100420351506110001735252000200010003257012035203515753184210001000100020354211100110000731671117812000100020362036203620362036
100420351606110001735252000200010003257012035203515753184210001000100020354211100110000731671117812000100020362036203620362036
100420351606110001735252000200010003257012035203515753184210001000100020354211100110000731671117812000100020362036203620362036
100420351506110001735252000200010003257012035203515753184210001000100020354211100110000731671117812000100020362036203620362036
100420351506110001735252000200010003257012035203515753184210001000100020354211100110000731671117812000100020362036203620362036
100420351506110001735252000200010003257012035203515753184210001000100020354211100110000731671117812000100020362036203620362036
100420351506110001735252000200010003257012035203515753184210001000100020354211100110000731671117812000100020362036203620362036
100420351606110001735252000200010003257012035203515753184210001000100020354211100110000731671117812000100020362036203620362036
100420351506110001735252000200010003257012035203515753184210001000100020354211100110000731671117812000100020362036203620362036
100420351506110001735252000200010003257012035203515753184210001000100020354211100110000731671117812000100020362036203620362036

Test 2: Latency 1->2

Code:

  mvn w0, w0, ror #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)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
1020420035150961100001980325201002010010100185342491695520035200351842931870010100102001020020035421110201100991001010010000710159111979120000101002003620036200362003620036
1020420035150361100001980342201002010010100185342491695520035200351842931870010100102001020020035421110201100991001010010000710159111979120000101002003620036200362003620036
1020420035150061100001980325201002010010100185342491695520035200351842931870010100102001020020035421110201100991001010010000710159111979120000101002003620036200362003620036
1020420035150661100001980325201002010010100185342491695520035200351842931870010100102001020020035421110201100991001010010000710159111979120000101002003620036200362003620036
1020420035150061100001980325201002010010100185342491695520035200351842931870010100102001020020035421110201100991001010010000710159111979120000101002003620036200362003620036
10204200351507561100001980325201002010010100185342491695520035200351842931870010100102001020020035421110201100991001010010000710159111979120000101002003620036200362003620036
1020420035150061100001980325201002010010100185342491695520035200351842931870010100102001020020035421110201100991001010010000710159111979120000101002003620036200362003620036
1020420035150061100001980325201002010010100185342491695520035200351842931870010100102001020020035421110201100991001010010000710159111979120000101002003620036200362003620036
1020420035150661100001980325201002010010100185342491695520035200351842931870010100102001020020035421110201100991001010010000710159111979120000101002003620036200362003620036
1020420035150061100001980325201002010010100185342491695520035200351842931870010100102001020020035421110201100991001010010000710159111979120000101002003620036200362003620036

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)696a6b6d6emap 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)st unit uop (a7)l1d cache writeback (a8)a9accdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
100242003515006110000197432520010200101001018531049169550200352003518451318718100101002010020200354211100211091010010100000150640263221979220000100102003620036200362003620036
1002420035150246611000019743252001020010100101853104916955020035200351845131871810010100201002020035421110021109101001010000000640263221979220000100102003620036200362003620036
1002420035150282611000019743252001020010100101853104916955020035200351845131871810010100201002020035421110021109101001010000001640263221979220000100102003620036200362003620036
1002420035150339611000019743252001020010100101853104916955020035200351845131871810010100201002020035421110021109101001010000000640263221979220000100102003620036200362003620036
10024200351500611000019743252001020010100101853104916955020035200351845131871810010100201002020035421110021109101001010000000640263221979220000100102003620036200362003620036
10024200351500611000019743252001020010100101853104916955020035200351845131871810010100201002020035421110021109101001010000000640263221979220000100102003620036200362003620036
10024200351500611000019743252001020010100101853104916955020035200351845131871810010100201002020035421110021109101001010000000640263221979220000100102003620036200362003620036
100242003515012611000019743252001020010100101853104916955020035200351845131871810010100201002020035421110021109101001010000000640263221979220000100102003620036200362003620036
10024200351500611000019743252001020010100101853104916955020035200351845131871810010100201002020035421110021109101001010000000640263221979220000100102003620036200362003620036
10024200351500611000019743252001020010100101853104916955020035200351845131871810010100201002020035421110021109101001010000000640263221979220000100102003620036200362003620036

Test 3: throughput

Count: 8

Code:

  mvn w0, w8, ror #17
  mvn w1, w8, ror #17
  mvn w2, w8, ror #17
  mvn w3, w8, ror #17
  mvn w4, w8, ror #17
  mvn w5, w8, ror #17
  mvn w6, w8, ror #17
  mvn w7, w8, ror #17
  mov x8, 9

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.3344

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)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 cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
80204267682000000510288003126146281601821601828026216190614923652267492674916651816661802628037680376267323911802011009910080100100000000011151290160026729160082801002673326732267332673226733
8020426732200000030352498003126146281601821601828026216190604923652267322673216651816661802628037680376267313911802011009910080100100000000011151290160026729160082801002673226733267332673326733
80204267322000000240288003126146281601821601828026216190604923652267322673216651816661802628037680376267323911802011009910080100100000000011151290160026728160082801002673326733267332673326733
8020426732200000000288003126146281601821601828026216190604923652267322673216651816661802628037680376267323911802011009910080100100000000011151290160026729160082801002673326733267332673326733
80204267322010000540288003126146271601821601828026216190604923652267322673116651816661802628037680376267323911802011009910080100100000000011151290160026729160082801002673326733267332673326732
80204267322000000240288003126146281601821601828026216190604923652267322673216651816661802628037680376267323911802011009910080100100000000011151290160026729160082801002673326733267332673326733
802042673220000005100288003126146281601821601828026216190614923652267322673216651816661802628037680376267323911802011009910080100100000000011151290160026729160082801002673326733267332673326733
80204267322000000120288003126146281601821601828026216190604923652267322673216651816661802628037680376267323911802011009910080100100000000011151290160026729160082801002673326733267332673326733
80204267322000000210288003126146281601821601828026216190604923652267322673216651816661802628037680376267323911802011009910080100100000000011151290160026729160082801002673326733267322673326733
80204267322010000240288003126146281601821601828026216190604923652267322673216651816661802628060080376267323911802011009910080100100000000011151290160026729160082801002673326733267332673326733

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)0318191e3f4c4d51schedule 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)ea? int retires (ef)f5f6f7f8fd
8002426717200001261800002128025160010160010800101631420492363126711267111662331668580010800208002026711391180021109108001010005020922107267041600000800102671226712267122671226712
800242671120000061800002128025160010160010800101631420492363126711267111662331668580010800208002026711391180021109108001010005020822910267041600000800102671226712267122671226712
800242671120040186180000212802516001016001080010163142049236922671126711166233166858001080020800202671139118002110910800101000502072279267041600000800102671226712267122671226712
80024267112000006180000212802516001016001080010163142149236312671126711166233166858001080020800202671139118002110910800101000502062299267041600000800102671226712267122671226712
8002426711200000618000021280251600101600108001016314204923631267112671116623316685800108002080020267113911800211091080010100050201022810267041600000800102671226712267122671226712
80024267112000006180000212802516001016001080010163142049236312671126711166233166858001080020800202671139118002110910800101003502092269267041600000800102671226712267122671226712
800242671120000061800002128025160010160010800101631420492363126711267111662331668580010800208002026711391180021109108001010005020922109267041600000800102671226712267122671226712
800242671120040246180000212802516001016001080010163142049236312671126711166233166858001080020800202671139118002110910800101000502010221111267041600000800102671226712267122671226712
80024267111990006180000212802516001016001080010163142149236312671126711166233166858001080020800202671139118002110910800101000502092298267041600000800102671226712267122671226712
800242671120000061800002128025160010160010800101631420492363126711267111662331668580010800208002026711391180021109108001010005020722810267041600000800102671226712267122671226712