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, 16B)

Test 1: uops

Code:

  cmgt v0.16b, v0.16b, #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)03191e3a3f4e51schedule 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)l1d tlb access (a0)l1d tlb miss (a1)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
1004203715000611686251000100010002645211201820372037157131895100010001000203720371110011000000073116111786100020382038203820382038
1004203715000821686251000100010002645211201820372037157131895100010001000203720371110011000000073116111786100020382038203820382038
1004203716000611686251000100010002645211201820372037157131895100010001000203720371110011000000073116211786100020382038203820382038
1004203715090611686251000100010002645210201820372037157131895100010001000203720371110011000000073116211786100020382038203820382038
1004203715000611686251000100010002645210201820372037157131895100010001000203720371110011000000073116111786100020382038203820382038
1004203715000821686251000100010002645211201820372037157131895100010001000203720371110011000000073116111786100020382038203820382038
1004203715000611686251000100010002645210201820852037157131895100010001000203720371110011000000073116111786100020382038203820382038
1004203715000611686251000100010002645210201820372037157131895100010001000203720371110011000000073116111786100020382038203820382038
1004203715000611686251000100010002645210201820372037157131895100010001000203720371110011000000373116111786100020382074203820382038
1004203715100611686251000100010002645210201820372037157131895100010001000203720371110011000000073116211786100020382038203820382038

Test 2: Latency 1->2

Code:

  cmgt v0.16b, v0.16b, #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 tlb access (a0)ld unit uop (a6)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)ea? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100000000710116111979100100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100000030710116111979100100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100023400710125211979120100001002008520038200382008620038
1020420037150306119675251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100000000710116111979100100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100000030710116111979100100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100000000710116111979100100001002003820038200382003820038
1020420037150156119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100000000710116111979100100001002003820038200382003820038
1020420037150246119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100000000710116111979100100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100000000710116111979100100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100000000710116111979100100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)031e1f3f4e51schedule 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
10024200371509061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
10024200371500061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001010640216221978610000102003820038200382003820038
10024200371500061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001009640216221978610000102003820038200382003820038
10024200371500061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
10024200371500061196862510010101000010100005028475211200182003720037184433187671016320100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
10024200371500061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
100242003715042061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
1002420037150357061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
10024200371500061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640216221984810000102003820038200382003820038
100242003715012061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

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

(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 instruction (07)l2 tlb miss instruction (0a)1e1f3f51schedule 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
802042005915011120292580108100800081008002050064075612001920038200389977699898012020080032200800322003820038118020110099100100800001000011151181161120035800001002003920039200392003920039
80204200381501100292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151181161120035800001002003920039200392003920039
802042003815011005042580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151181161220035800001002003920039200392003920039
8020420038150110045032580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151181161120035800001002003920039200392003920039
802042003815011002002580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151181162120035800001002003920039200392003920039
80204200381501100292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151181161120035800001002003920039200392003920039
80204200381501100292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151181161120035800001002003920039200392003920039
80204200381501100292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151181161120035800001002003920039200392003920039
80204200381501100292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151181161220035800001002003920039200392003920039
80204200381501100292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151181161120035800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03191e3f51schedule 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)6061696d6emap 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 mispred nonspec (cb)cfd0d2d5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242005115000392580010108000010800005064000010200192003820038999631001880010208000020800002003820038118002110910108000010000502000161612122003580000102003920039200392003920039
800242003815000392580010108000010800005064000010200192003820038999631001880010208000020800002003820038118002110910108000010000502000121610122003580000102003920039200392003920039
800242003815000392580010108000010800005064000010200192003820038999631001880010208000020800002003820038118002110910108000010000502000111611122003580000102003920039200392003920039
800242003815000392580010108000010800005064000010200192003820038999631001880010208000020800002003820038118002110910108000010000502000141613122003580000102003920039200392003920039
80024200381500039258001010800761080000506400001020019200382003899963100188001020800002080000200382003811800211091010800001000050200091612142003580000102003920039200392003920039
80024200381500039258001010800001080000506400001020019200382003899963100188001020800002080000200382003811800211091010800001000050200012161392003580000102003920039200392003920039
80024200381500039258001010800001080000506400001020019200382003899963100188001020800002080000200382003811800211091010800001000050200012169142003580000102003920039200392003920039
80024200381500339258001010800001080000506400001020019200382003899963100188001020800002080000200382003811800211091010800001000050200012161482003580000102003920039200392003920039
800242003815000392580010108000010800005064000010200192003820038999631001880010208000020800002003820038118002110910108000010000502000141613122003580000102003920039200392003920039
80024200381500039258001010800001080000506400001020019200382003899963100188001020800002080000200382003811800211091010800001000050200081612102003580000102003920039200392003920039