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

FCMGT (vector, zero, 4S)

Test 1: uops

Code:

  fcmgt v0.4s, v0.4s, #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)03191e1f3f4e51schedule 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
10042037150006116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
10042037150006116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
10042037150006116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
10042037150006116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
10042037150006116862510001000100026452102018203720701571318951000100010002037203711100110000073116111786100020382038203820382038
10042037150006116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
10042037150006116862510001000100026452112018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
10042037150006116862510001000100026452112018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
10042037150006116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
10042037150006116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038

Test 2: Latency 1->2

Code:

  fcmgt v0.4s, v0.4s, #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)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 cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020420037150816119686251010010010000100100005002847521200182003720037184283187451010020210000200100002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001000007101162119791100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
1020420037150126119686251010010010000100100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001001007101161119791100001002003820038200382003820038
1020420037150276119686251010010010000105100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715606119686251010010010000100100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521200222003720037184243187451010020010000200100002003720037111020110099100100100001000007101161119791100001002003820038200382003820038

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 cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002420037150061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
10024200371500137196862510010101000010100005028475210200182003720037184433187671001020101692010000200372003711100211091010100001000640216221978610000102003820038200382003820038
1002420037150061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
1002420037150061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
1002420037150061196862510010101000010101505028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
100242003715027061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
100242003715034261196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
1002420037150061196862510010101000810100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
1002420037150061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
1002420037150061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  fcmgt v0.4s, v8.4s, #0
  fcmgt v1.4s, v8.4s, #0
  fcmgt v2.4s, v8.4s, #0
  fcmgt v3.4s, v8.4s, #0
  fcmgt v4.4s, v8.4s, #0
  fcmgt v5.4s, v8.4s, #0
  fcmgt v6.4s, v8.4s, #0
  fcmgt v7.4s, v8.4s, #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)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)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)fetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200481500029258010810080008100800205006401320200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392003920039
80204200381500029258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392003920039
802042003815000579258010810080008100800205006401320200192003820038997799989801202008003220080032200382003811802011009910010080000100001115118016220035800001002003920039200392003920039
802042003815002429258010810080008100800205006407561200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392003920039
80204200381500029258010810080008100800205006401320200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392003920039
80204200381500629258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392003920039
802042003815010694258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392003920039
80204200381500029258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392003920039
8020420038150038429258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392003920039
80204200381500629258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392003920039

1000 unrolls and 10 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)l2 tlb miss data (0b)1e3a3f51schedule 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)5f60696d6emap 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)accfl1i cache miss demand (d3)l1i tlb miss demand (d4)d5map dispatch bubble (d6)ddfetch restart (de)e0ea? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200391500000039258001010800001080000506400000120019200382003899963100188001020800002080000200382003811800211091010800001000035020009164220035080000102003920039200392003920039
80024200381500000039258001010800001080000506400000120019200382003899963100188001020800002080000200382003811800211091010800001000035020004164220035080000102003920039200392003920039
80024200381500000039258001010800001080000506400000120019200382003899963100188001020800002080000200382003811800211091010800001000035020002162420035080000102003920039200392003920039
80024200381500000039258001010800001080000506400000120019200382003899963100188001020800002080000200382003811800211091010800001000005020002162420035080000102003920039200392003920039
800242003815000000392580010108000010800005064000001200192003820038999631001880010208000020800002003820038118002110910108000010000155020002162420035080000102003920039200392003920039
80024200381500000039258001010800001080000506400000120019200382003899963100188001020800002080000200382003811800211091010800001000035020002164420035080000102003920039200392003920039
80024200381500009039258001010800001080000506400000120019200382003899963100188001020800002080000200382003811800211091010800001000005020004164220035080000102003920039200392003920039
80024200381500000039258001010800001080000506400000120019200382003899963100188001020800002080000200382003811800211091010800001000005020002166620035080000102003920039200392003920039
80024200381500000039258001010800001080000506400000120019200382003899963100188001020800002080000200382003811800211091010800001000005020004162420035080000102003920039200392003920039
800242003815000000392580010108000010800005064000001200192003820038999631001880010208000020800002003820038118002110910108000010000050200031624200354080000102003920039200392003920039