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

FMAX (vector, 4H)

Test 1: uops

Code:

  fmax v0.4h, v0.4h, v1.4h
  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)03183f4e51schedule 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)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst simd alu (9a)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
10042037150611687251000100010002646800201820372037157131895100010002000203720371110011000073116111785100020382038203820382038
10042037150611687251000100010002646801201820372037157231895100010002000203720371110011000075116111787100020382038203820382038
100420371502511687251000100010002646800201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
10042037150611687251000100010002646800201820372037157231895100010002000203720371110011000373116111787100020382038203820382038
10042037150611687251000100010002646800201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
10042037150611687251000100010002646801201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
10042037150611687251000100010002646801201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
10042037160611687251000100010002646800201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
10042037150611687251000100010002646801201820372037157231895100010002000203720371110011000073116211787100020382038203820382038
10042037150611687251000100010002646801201820372037157131895100010002000203720371110011000073116111787100020382038203820382038

Test 2: Latency 1->2

Code:

  fmax v0.4h, v0.4h, v1.4h
  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)03181e1f3f4e51schedule 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)acbranch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715000061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715000061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715000061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
1020420037150100457196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715000061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715000061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715000061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715000061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001001907101161119791100001002003820038200382003820038
10204200371500153104179196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042007415000061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)0318191e1f3f4e51schedule 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)a9cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024200371500000124196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
1002420037150000061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
10024200371500000130196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
10024200371500000149196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
10024200371500020788170196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
10024200371500000536196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
1002420037150000061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
1002420037150000061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
10024200371500069061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
10024200371500000145196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038

Test 3: Latency 1->3

Code:

  fmax v0.4h, v1.4h, v0.4h
  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)0318191e3f4e51schedule 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)acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204200371500006119687441010010010000100100005002847680120018200372003718429718740101002001000820020016200372003711102011009910010010000100001117170160019801100001002003820038200382003820038
10204200371500006619687251010010010000100100005002847680120018200372003718429718740101002001000820020016200372003711102011009910010010000100001117170160019801100001002003820038200382003820038
10204200371500006119687251010010010000100100005002847680120018200372003718429618741101002001000820020016200372003711102011009910010010000100001117170160019801100001002003820038200382003820038
10204200371500006119687251010010010000100100005002847680120018200372003718429618741101002001000820020016200372003711102011009910010010000100001117170160019836100001002003820038200382003820038
10204200371500006119687251010010010000100100005002847680120018200372003718429718741101002001000820020016200372003711102011009910010010000100001117170160019801100001002003820038200382003820038
1020420037150131716119687251010010010000100100005002847680120018200372003718429618741101002001000820020016200372003711102011009910010010000100001117170160019801100001002003820038200382003820038
10204200371500006119687251010010010000100100005002847680120018200372003718429718741101002001000820020016200372003711102011009910010010000100001117180160019801100001002003820038200382003820038
10204200371500008419687251010010010000100100005002847680020018200372003718429618740101002001000820020016200372003711102011009910010010000100001117170160019802100001002003820038200382003820038
10204200371500006119687251010010010000100100005002847680020018200372003718429718740101002001000820020016200372003711102011009910010010000100001117170160019802100001002003820038200382003820038
10204200371500006119687251010010010000100100005002847680020018200372003718429618741101002001000820020016200372003711102011009910010010000100001117170160019802100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03l2 tlb miss data (0b)181e1f3a3f4e51schedule 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)9fcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
100242003715000900143196872510010101000010100005028476802001820037200371844431876710010201000020200002003720037111002110910101000010640316331978510000102003820038200382003820038
10024200371500100061196872510010101000010100005028476802001820037200371844431876710010201000020200002003720037111002110910101000010640316331978510000102003820038200382003820038
10024200371500000061196872510010101000010100005028476802001820037200371844431876710010201000020200002003720037111002110910101000010640316331978510000102003820038200382003820038
10024200371500000061196872510010101000010100005028476802001820037200371844431876710010201000020200002003720037211002110910101000010640316331978510000102003820038200382003820038
10024200371500000066196872510010101000010100005028476802001820037200371844431876710010201000020200002003720037111002110910101000010640316331978510000102003820038200382003820038
100242003715000000145196872510010101000010100005028476802001820037200371844431876710010201000020200002003720037111002110910101000010640316331978510000102003820038200382003820038
10024200371500000182196872510010101000010100005028476802001820037200371844431876710010201000020200002003720037111002110910101000010640316331978510000102003820038200382003820038
10024200371500000061196872510010101000010100005028476802001820037200371844431876710010201000020200002003720037111002110910101000010640316331978510000102003820038200382003820038
100242003715000180061196872510010101000010100005028476802001820037200371844431876710010201000020200002003720037111002110910101000010640316331978510000102003820038200382003820038
10024200371500000061196872510010101000010100005028476802001820037200371844431876710010201000020200002003720037111002110910101000010640316331978510000102003820038200382003820038

Test 4: throughput

Count: 8

Code:

  fmax v0.4h, v8.4h, v9.4h
  fmax v1.4h, v8.4h, v9.4h
  fmax v2.4h, v8.4h, v9.4h
  fmax v3.4h, v8.4h, v9.4h
  fmax v4.4h, v8.4h, v9.4h
  fmax v5.4h, v8.4h, v9.4h
  fmax v6.4h, v8.4h, v9.4h
  fmax v7.4h, v8.4h, v9.4h
  movi v8.16b, 9
  movi v9.16b, 10

(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)03l2 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)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)ld unit uop (a6)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200491500000014725801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000000000511021611200350800001002003920039200392003920039
8020420038150000004025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000000000511011611200790800001002003920039200392003920039
8020420189155000004025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000000000511011611200350800001002003920039200392003920039
8020420038150000004025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000000000511011611200350800001002003920039200392003920039
8020420038150000004025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000000000511011611200350800001002003920039200392003920039
8020420038150000004025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001002430000511011611200350800001002003920039200392003920039
8020420038150000004025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000000000511011611200350800001002003920039200392003920039
8020420038150000004025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000000000511011611200350800001002003920039200392003920039
8020420038150000004025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000000000511011611200350800001002003920039200392003920039
8020420038150000004025801001008000010080000500640000020019200382003899723999680100200800002001600002003820038118020110099100100800001000000000511011611200350800001002003920039200392003920039

1000 unrolls and 10 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)18191e1f3a3f51schedule 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)simd prf full (72)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)ld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)dbddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200391500000000392580010108000010800005064000002001920038200389996031001880010208000020160000200382003811800211091010800001000000000502031602320035080000102003920039200392003920039
80024200381500000000392580010108000010800005064000002001920038200389996031001880010208000020160000200382003811800211091010800001000000000502021602320035080000102003920039200392003920039
80024200381500000000392580010108000010800005064000002001920038200389996031001880010208000020160000200382003811800211091010800001000000200503731603220035080000102003920039200392003920039
80024200381500000000392580010108000010800005064000002001920038200389996031001880010208000020160000200382003811800211091010800001000000000502031603220035080000102003920039200392003920039
80024200381500000000392580010108000010800005064000002001920038200389996031001880010208000020160000200382003811800211091010800001000000000502031703320035080000102003920039200392003920039
80024200381550000000392580010108000010800005064000002001920038200389996031001880010208000020160000200382003811800211091010800001000000000502021604320035080000102003920039200392003920039
80024200381500000000392580010108000010800005064000002001920038200389996031001880010208000020160000200382003811800211091010800001000000000502031602320035080000102003920039200392003920039
8002420038150000090010225800101080000108000050640000020019200382003899960310018800102080000201600002003820038118002110910108000010000000120502021603320035080000102003920039200392003920039
80024200381500000000622580010108000010800005064000002001920038200389996031001880010208000020160000200382003811800211091010800001000000000502031603320035080000102003920039200392003920039
80024200381500000000392580010108000010800005064000002001920038200389996031001880010208000020160000200382003811800211091010800001000000000502031603320035080000102003920039200392003920039