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

CMEQ (zero, 8B)

Test 1: uops

Code:

  cmeq v0.8b, v0.8b, #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)03l2 tlb miss data (0b)1e3f4e51schedule 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 cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
1004203715006116862510001000100026452102018203720741571318951000100010002037203711100110000073116111786100020382038203820382038
100420371601815616862510001000100026452102018203720371571318951000100010002037203711100110000973116111786100020382038203820382038
1004203715006116862510001000100026452112018203720371571318951000100010002037203711100110004073116111786100020382038203820382038
1004203715006116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
1004203715006116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
1004203715006116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
1004203715006116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
1004203715006116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
1004203715006116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
1004203715006116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038

Test 2: Latency 1->2

Code:

  cmeq v0.8b, v0.8b, #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 miss (a1)ld unit uop (a6)l1d cache writeback (a8)a9acbranch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020420037150061196862510100100100001001000059628475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000010007101161119791100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521020018200372003718421221874510100200100002001000020037200371110201100991001001000010000101807101161119791100001002003820038200382023020038
1020420037150061196862510100100100001001000050028475210200182003720037184213187451010020010000200100002003720037111020110099100100100001000210007101161119791100001002003820038200382003820038
10204200371503061196862510100100100001001000050028475211200182003720037184213187451010020010000200100002003720037111020110099100100100001002000607101161119791100001002003820038200382003820038
1020420037150061196862510100100100001001000050028475210200182003720037184213187451010020010000200100002003720037111020110099100100100001000000007101161119791100001002003820038200382003820038
10204200371500611968625101001001000010010000500284752112001820037200371842131874510100200100002001000020037200371110201100991001001000010000450907101161119791100001002003820038200382003820038
1020420037150061196862510100100100001001000050028475210200182003720037184213187451010020010000200100002003720037111020110099100100100001000002007101161119791100001002003820038200382003820038
1020420037150061196862510100100100001001000050028475210200182003720037184213187451010020010000200100002003720037111020110099100100100001000040007101161119791100001002003820038200382003820038
10204200371490611968625101001001000010010000500284752102001820037200371842131874510100200100002001000020037200371110201100991001001000010000270307101161119791100001002003820038200382003820038
1020420037149061196862510100100100001001000050028475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000000007101161119791100001002003820038200382003820038

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)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 cache writeback (a8)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
100242003715006119686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
100242003715006119686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
100242003715006119686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
100242003715008219686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
100242003715006119686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
100242003715006119686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100100640216221978610000102003820038200382003820038
100242003715006119686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
100242003715006119686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
100242003715006119686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
100242003715006119686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  cmeq v0.8b, v8.8b, #0
  cmeq v1.8b, v8.8b, #0
  cmeq v2.8b, v8.8b, #0
  cmeq v3.8b, v8.8b, #0
  cmeq v4.8b, v8.8b, #0
  cmeq v5.8b, v8.8b, #0
  cmeq v6.8b, v8.8b, #0
  cmeq v7.8b, v8.8b, #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)0309l2 tlb miss instruction (0a)l2 tlb miss data (0b)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 tlb access (a0)ld unit uop (a6)l1d cache writeback (a8)acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfmap dispatch bubble (d6)dde0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200571502000712580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000000111511816020035800001002003920039200392003920039
802042003815000001132580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000000111511816020035800001002003920039200392003920039
80204200381500000292580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000000111511816020035800001002003920039200392003920039
802042003815000004952580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000000111511816020035800001002003920039200392003920039
8020420038150000015332580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000000111511816020035800001002003920039200392003920039
802042003815000003432580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000000111511816020035800001002003920039200392003920039
802042003815000006012580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000000111511816020035800001002003920039200392003920039
802042003815000002925801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010000383111511816020035800001002003920039200392003920039
80204200381500000292580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000000111511816020035800001002003920039200392003920039
80204200381500000292580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000000111511816020035800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03l2 tlb miss data (0b)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)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)accfd0d2d5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200511500039258001010800001080000506400001520019200382003899963100188001020800002080000200382003811800211091010800001000502050716472003580000102003920039200392003920039
80024200381500039258001010800001080000506400000520019200382003899963100188001020800002080000200382003811800211091010800001000502050616342003580000102003920039200392003920039
80024200381500039258001010800001080000506400001520019200382003899963100188001020800002080000200382003811800211091010800001000502000516442003580000102003920039200392003920039
80024200381500039258001010800001080000506400001520019200382003899963100188001020800002080000200382003811800211091010800001000502000416342003580000102003920039200392003920039
80024200381500039258001010800001080000506400001520019200382003899963100188001020800002080000200382003811800211091010800001000502000416762003580000102003920039200392003920039
80024200381500083258001010800001080000506400000520019200382003899963100188001020800002080000200382003811800211091010800001000502050916342003580000102003920039200392003920039
80024200381500039258001010800001080000506400001020019200382003899963100188001020800002080000200382003811800211091010800001010502050916342003580000102003920039200392003920039
80024200381500039258001010800001080000506400001020019200382003899963100188001020800002080000200382003811800211091010800001000502050416442003580000102003920039200392003920039
80024200381500039258001010800001080000506400001020019200382003899963100188001020800002080000200382003811800211091010800001000502000816442003580000102003920039200392003920039
80024200381500039258001010800001080000506400001520019200382003899963100188001020800002080000200382003811800211091010800001000502050516782003580000102003920039200392003920039