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

MOVI (vector, 4S, msl)

Test 1: uops

Code:

  movi v0.4s, #3, msl #8

(no loop instructions)

1000 unrolls and 1 iteration

Retires: 1.000

Issues: 1.000

Integer unit issues: 0.000

Load/store unit issues: 0.000

SIMD/FP unit issues: 1.000

retire uop (01)cycle (02)031e3f51schedule uop (52)schedule simd uop (54)dispatch simd uop (57)ldst uops in schedulers (5b)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map simd uop (7e)8283flush restart other nonspec (84)85inst all (8c)inst simd alu (9a)l1d cache writeback (a8)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
1004288204025100010001000700002692882881233146100010002882881110011000073116112851000289289289289289
1004288204025100010001000700002692882881233146100010002882881110011000073116112851000289289289289289
1004288204025100010001000700002692882881233146100010002882881110011000073116112851000289289289289289
1004288204025100010001000700002692882881233146100010002882881110011000073116112851000289289289289289
1004288204025100010001000700002692882881233146100010002882881110011000173116112851000289289289289289
1004288204025100010001000700002692882881233146100010002882881110011000073116112851000289289289289289
1004288204025100010001000700002692882881233146100010002882881110011000073116112851000289289289289289
1004288204025100010001000700002692882881233146100010002882881110011000073116112851000289289289289289
1004288204025100010001000700002692882881233146100010002882881110011000073116112851000289289289289289
1004288204025100010001000700002692882881233146100010002882881110011000073116112851000289289289289289

Test 2: throughput

Count: 8

Code:

  movi v0.4s, #3, msl #8
  movi v1.4s, #3, msl #8
  movi v2.4s, #3, msl #8
  movi v3.4s, #3, msl #8
  movi v4.4s, #3, msl #8
  movi v5.4s, #3, msl #8
  movi v6.4s, #3, msl #8
  movi v7.4s, #3, msl #8

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.2505

retire uop (01)cycle (02)03mmu table walk data (08)l2 tlb miss data (0b)18191e1f3f51schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)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)inst simd alu (9a)9fl1d tlb access (a0)ld unit uop (a6)l1d cache writeback (a8)a9acc2branch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)ea? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042005815500001140402580100100800001008000050056000012001920038200389973399968010020080000200200382003811802011009910010080000100000000052142982320280230800001002009120352203512035020396
80204202911570027660440117125805851238046512580484608563382020218201982029110024241012880603200804882022029320348618020110099100100800001004000329040516431122220240220800001002045120451204502050020451
80204204511591091010566161813179808741068083812280786626566130020348203362033810032421021080902200808862082039620497918020110099100100800001000012421040525821272120350220800001002043920446205142045620445
802042048115901881065704270118180862121807421088078659956608302033820443204419997391020781110204807802002039620447918020110099100100800001000202374500522631062220321220800001002019020345201402034720347
802042034615811000040258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000005110216222003500800001002003920039200392003920039
802042003815500000040258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000005110216222003500800001002003920039200392003920039
8020420038155000000325258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000005110216222003500800001002003920039200392003920039
802042003815500000040258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000005110216222003500800001002003920039200392003920039
802042003815500000040258010010080000100800005005600000200992003820038997339996801002008000020020038200381180201100991001008000010000100005110216222003500800001002003920039200392003920039
802042003815500000040258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000005110216222003500800001002003920039200392003920039

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.2505

retire uop (01)cycle (02)031e3f51schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)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)inst simd alu (9a)9fl1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)accfd2l1i cache miss demand (d3)d5map dispatch bubble (d6)d9ddfetch restart (de)e0eb? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242004815512392580010108000010800005056000002001920038200389996310018800102080000202003820038118002110910108000010000050200061604620035080000102003920039200392003920039
800242003815527392580010108000010800005056000012001920038200389996310018800102080000202003820038118002110910108000010000050200021602420035080000102003920039200392003920039
80024200381550392580010108000010800005056000002001920038200389996310018800102080000202003820038118002110910108000010000050200041604220035080000102003920039200392003920039
80024200381560392580010108000010800005056000012001920038200389996310018800102080000202003820038118002110910108000010000050200031604220035080000102003920039200392003920039
80024200381550392580010108000010800005056000002001920038200389996310018800102080000202003820038118002110910108000010000050200021604220035080000102003920039200392003920039
80024200381550392580010108000010800005056000002001920038200389996310018800102080000202003820038118002110910108000010000050200051602420035080000102003920039200392003920039
80024200381550392580010108000010800005056000002001920038200389996310018800102080000202003820038118002110910108000010000050200021602420035080000102003920039200392003920039
80024200381550392580010108000010800005056000002001920038200389996310018800102080000202003820038118002110910108000010000050200061602420035080000102003920039200392003920039
80024200381550392580010108000010800005056000002001920038200389996310018800102080000202003820038118002110910108000010000050200021604220035080000102003920039200392003920039
80024200381560392580010108000010800005056000002001920038200389996310018800102080000202003820038118002110910108000010000050200051602420035080000102003920039200392003920039