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, 2S)

Test 1: uops

Code:

  cmgt v0.2s, v0.2s, #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)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 miss (a1)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
10042037150155168625100010001000264521020182037203715713189510001000100020372037111001100000073316331786100020382038203820382038
1004203715061168625100010001000264521020182037203715713189510001000100020372037111001100000073316331786100020382038203820382038
1004203715061168625100010001000264521020182037203715713189510001000100020372037111001100000073216331786100020382038203820382038
1004203715082168625100010001000264521020182037203715713189510001000100020372037111001100000095316331786100020382038203820382038
10042037150156168625100010001000264521020182037203715713189510001000100020372037111001100000073316331786100020382038203820382038
1004203716061168625100010001000264521020182037203715713189510001000100020372037111001100000373316221786100020382038203820382038
1004203715061168625100010001000264521020182037203715713189510001000100020372037111001100000073316331786100020382038203820382038
1004203715061168625100010001000264521020182037203715713189510001000100020372085111001100000073216331786100020382038203820382038
1004203715061168625100010001000264521020182037203715713189510001000100020372037111001100000073316331786100020382038203820382038
1004203715061168625100010001000264521120182037203715713189510001000100020372037111001100000073316331786100020382038203820382038

Test 2: Latency 1->2

Code:

  cmgt v0.2s, v0.2s, #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)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)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)st unit uop (a7)l1d cache writeback (a8)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715000006119686251010010010000100100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
102042003715000006119686251010010010000100100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
102042003715000006119686251010010010000100100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
102042003715000006119686251010010010000100100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
102042003715000006119686251010010010000100100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001000030071011611197910100001002003820038200382003820038
102042003715000006119686251010010010000100100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
102042003715000006119686251010010010000100100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001000006071011611197910100001002003820038200382003820038
102042003715000006119686251010010010000100100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
102042003715000006119686251010010010000100100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
102042003715000006119686251010010010000100100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001000100071011611197910100001002003820038200382003820038

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)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)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024200371500103196862510010101000010100005028475210200182003720037184430318767100102010000201000020037200371110021109101010000100000640216221985410000102003820038200382003820038
10024200371500126196862510010101000010100005028475211200182003720037184430318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
1002420085150061196862510010101000010100005028475210200182003720037184430318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
10024200371500166196862510010101000010100005028475211200182003720037184430318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
10024200371500145196862510010101000010100005028475211200182003720037184430318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
1002420037149082196862510010101000010100005028475211200182003720037184430318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
10024200371500103196862510010101000010100005028475211200182003720037184430318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
10024200371500258196862510010101000010100005028475211200182003720037184430318767100102010000201000020037200371110021109101010000100030640216221978610000102003820038200382003820038
1002420037150084196862510010101000010100005028475211200182003720037184430318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
1002420037150061196862510010101000010100005028475211200182003720037184430318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  cmgt v0.2s, v8.2s, #0
  cmgt v1.2s, v8.2s, #0
  cmgt v2.2s, v8.2s, #0
  cmgt v3.2s, v8.2s, #0
  cmgt v4.2s, v8.2s, #0
  cmgt v5.2s, v8.2s, #0
  cmgt v6.2s, v8.2s, #0
  cmgt v7.2s, v8.2s, #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)033f51schedule 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
8020420059150292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151182162320035800001002003920039200392003920039
80204200381503032580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001002011151183162220035800001002003920039200392003920039
8020420038150922580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151184162320035800001002003920039200392003920039
8020420038150292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151184165220035800001002003920039200392003920039
8020420038150292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151183162220035800001002003920039200392003920039
8020420038150292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151183164320035800001002003920039200392003920039
80204200381505992580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151183163320035800001002003920039200392003920039
8020420038150292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151182162320035800001002003920039200392003920039
8020420038150292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151184163320035800001002003920039200392003920039
8020420038150292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151184162220035800001002003920039200392003920039

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)60696b6d6emap 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
8002420051150393925800101080000108000050640000120019020038200389996310018800102080000208000020038200381180021109101080000100050201116692003580000102003920039200392003920039
800242003815005142580010108000010800005064000012001902003820038999631001880010208000020800002003820038118002110910108000010005020716692003580000102003920039200392003920039
8002420038150039258001010800001080000506400001200190200382003899963100188001020800002080000200382003811800211091010800001000502011161092003580000102003920039200392003920039
8002420038150039258001010800001080000506400000200190200382003899963100188001020800002080000200382003811800211091010800001000502010165112003580000102003920039200392003920039
800242003815003925800101080000108000050640000020019020038200389996310018800102080000208000020038200381180021109101080000100050201016952009780000102003920039200392003920039
80024200381500392580010108000010800005064000002001902003820038999631001880010208000020800002003820038118002110910108000010005020816752003580000102003920039200392003920039
800242003815003925800101080000108000050640000020019020038200389996310018800102080000208000020038200381180021109101080000100050209166112003580000102003920039200392003920039
800242003815054392580010108000010800005064000002001902003820038999631001880010208000020800002003820038118002110910108000010005020716472003580000102003920039200392003920039
80024200381500392580010108000010800005064000002001902003820038999631001880010208000020800002003820038118002110910108000010005020816952003580000102003920039200392003920039
80024200381500392580010108000010800005064000002001902003820038999631001880010208000020800002003820038118002110910108000010005020616772003580000102003920039200392003920039