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

CMGT (zero, 2D)

Test 1: uops

Code:

  cmgt v0.2d, v0.2d, #0
  movi v0.16b, 1
  movi v1.16b, 2

(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)031e3f4e51schedule uop (52)schedule simd uop (54)dispatch simd uop (57)ldst uops in schedulers (5b)696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map simd uop (7e)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst simd alu (9a)l1d tlb access (a0)ld unit uop (a6)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
10042037150611686251000100010002645212018203720371571318951000100010002037203711100110000073216221786100020382038203820382038
10042037150611686251000100010002645212018203720371571318951000100010002037203711100110000073216221786100020382038203820382038
10042037150611686251000100010002645212018203720371571318951000100010002037203711100110000073216221786100020382038203820382038
10042037160611686251000100010002645212018203720371571318951000100010002037203711100110000073216221786100020382038203820382038
10042037150611686251000100010002645212018203720371571318951000100010002037203711100110000073216221786100020382038203820382038
100420371601031686251000100010002645212018203720371571318951000100010002037203711100110000073216221786100020382038203820382038
10042037150611686251000100010002645212018203720371571318951000100010002037203711100110000073216221786100020382038203820382038
10042037150611686251000100010002645212018203720371571318951000100010002037203711100110000073216221786100020382038203820382038
10042037150611686251000100010002645212018203720371571318951000100010002037203711100110000073216221786100020382038203820382038
10042037150611686251000100010002645212018203720371571318951000100010002037203711100110000073216221786100020382038203820382038

Test 2: Latency 1->2

Code:

  cmgt v0.2d, v0.2d, #0
  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)031e3f4e51schedule 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)map simd uop inputs (81)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 cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037150072619686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
10204200371500611968625101001001000010010000500284752112001820037200371842131874510100200100002001000020037200371110201100991001001000010001777101161119791100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037150061196862510100100100001001000050028475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000847101161119791100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)031e3f4e51schedule 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)696d6emap 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)map simd uop inputs (81)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)l1d tlb miss (a1)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002420037150010319686251001010100001010000502847521200182003720037184433187671001020100002010000200372003711100211091010100001024006403162219786010000102003820038200382003820038
100242003715006119686251001010100001010000502847521200182003720037184433187671001020100002010000200372003711100211091010100001000006402162219786010000102003820038200382003820038
100242003715006119686251001010100001010000502847521200182003720037184433187671001020100002010000200372003711100211091010100001000006402162219786010000102003820038200382003820038
100242003715006119686251001010100001010000502847521200182003720037184433187671001020100002010000200372003711100211091010100001000006402162219786010000102003820038200382003820038
100242003715006119686251001010100001010000502847521200182003720037184433187671001020100002010000200372003711100211091010100001000006402162219786010000102003820038200382003820038
100242003715006119686251001010100001010000502847521200182003720037184433187671001020100002010000200372003711100211091010100001000006402162219786010000102003820038200382003820038
100242003715006119686251001010100001010000502847521200182003720037184433187671001020100002010000200372003711100211091010100001000006402162219786010000102003820038200382003820038
100242003715007261968625100101010000101000050284752120018200372003718443318767100102010000201000020037200371110021109101010000100001596402162219786010000102003820038200382003820038
10024200371500611968625100101010000101000050284752120018200372003718443318767100102010000201000020037200371110021109101010000100001926402162219786010000102003820038200382003820038
100242003715006119686251001010100001010000502847521200182003720037184433187671001020100002010000200372003711100211091010100001000006402162219786010000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  cmgt v0.2d, v8.2d, #0
  cmgt v1.2d, v8.2d, #0
  cmgt v2.2d, v8.2d, #0
  cmgt v3.2d, v8.2d, #0
  cmgt v4.2d, v8.2d, #0
  cmgt v5.2d, v8.2d, #0
  cmgt v6.2d, v8.2d, #0
  cmgt v7.2d, v8.2d, #0
  movi v8.16b, 9

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.2506

retire uop (01)cycle (02)03mmu table walk instruction (07)3f51schedule 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)map simd uop inputs (81)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)acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200481500292580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000000111511801600200350800001002003920039200392003920039
80204200381500292580108100800081008016650064019612002820049200499976999868012820080038200800382004920048118020110099100100800001000000222512812311200450800001002004920049200492004920049
802042004915006426801161008001610080028500640196120028200482004999761099868012820080038200800382004920048118020110099100100800001000000222512812311200460800001002004920049200492004920049
8020420048151064268011610080016100800285006401960200282004920048997699986801282008003820080038200492004811802011009910010080000100000105222512812311200450800001002004920049200492005020050
802042004815006426801161008001610080028500640196120028200482004899761099868012820080038200800382004920048118020110099100100800001000000222512912311200450800001002004920049200492004920050
80204200491500642780116100800161008002850064019602002820049200489976999868012820080038200800382004820048118020110099100100800001000000222512812311200450800001002005020050200502004920049
8020420048150055726801161008001610080028500640952120028200482004899769998680128200800382008003820049200481180201100991001008000010000090222513412311200450800001002004920049200492004920050
80204200491500642680116100800161008002850064019612002820048200489976999868012820080038200800382004820048118020110099100100800001000011105222512912311200460800001002004920050200502005020049
80204200481500642780116100800161008002850064019602002820048200489976999868012820080038200800382004820048118020110099100100800001000000222512812311200460800001002004920049200492005020050
802042004815006426801161008001610080028500640196020028200492004899761099868012820080038200800382004820048118020110099100100800001000000222512812311200460800001002004920049200502005020050

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03l2 tlb miss instruction (0a)1e3f51schedule 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)map simd uop inputs (81)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 cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242003915000392580010108000010800005064000002001920038200389996310018800102080000208000020038200381180021109101080000106435020416222003580000102003920039200392003920039
80024200381500039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010035020216222003580000102003920039200392003920039
80024200381490039258001010800001080000506400001200192024520038999631001880010208000020800002003820038118002110910108000010005020216222003580000102003920039200392003920039
80024200381500039258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010065020216222003580000102003920039200392003920039
800242003815000392580010108000010800005064000002001920038200389996310018800102080000208000020038200381180021109101080000101235020216222003580000102003920039200392003920039
800242003815010392580010108000010800005064000002001920038200389996310018800102080000208000020038200381180021109101080000104235020216222003580000102003920039200392003920039
80024200381500039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010035020216222003580000102003920039200392003920039
80024200381500039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010005020216222003580000102003920039200392003920039
80024200381500039258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010005020216222003580000102003920039200392003920039
800242003815000392580010108000010800005064000002001920038200389996310018800102080000208000020038200381180021109101080000100155020216222003580000102003920039200392003920039