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, 4H)

Test 1: uops

Code:

  fcmgt v0.4h, v0.4h, #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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
10042037150611686251000100010002645211201820372037157131895100010001000203720371110011000073216221786100020382038203820382038
10042037150611686251000100010002645211201820372037157131895100010001000203720371110011000073216221786100020382038203820382038
10042037150611686251000100010002645211201820372037157131895100010001000203720371110011000073216221786100020382038203820382038
10042037150611686251000100010002645211201820372037157131895100010001000203720371110011000073216221786100020382038203820382038
10042037150611686251000100010002645211201820372037157131895100010001000203720371110011000073216221786100020382038203820382038
10042037150611686251000100010002645211201820372037157131895100010001000203720371110011000073216221786100020382038203820382038
10042037150611686251000100010002645211201820372037157131895100010001000203720371110011000073216221786100020382038203820382038
10042037159611686251000100010002645211201820372037157131895100010001000203720371110011000073216221786100020382038203820382038
10042037153611686251000100010002645211201820372037157131895100010001000203720371110011000073216221786100020382038203820382038
10042037150611686251000100010002645211201820372037157131895100010001000203720371110011000073216221786100020382038203820382038

Test 2: Latency 1->2

Code:

  fcmgt v0.4h, v0.4h, #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)03l1i tlb fill (04)0918191e3f4e51schedule 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)9fld unit uop (a6)l1d cache writeback (a8)acc2cfd0d5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204200371501000306119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100000071001161119791100001002003820038200382003820038
10204200371500000156119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100000071001161119791100001002003820038200382003820038
1020420037150000006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100000071001161119791100001002003820038200382003820038
10204200371500000156119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100000071001161119899100001002003820038200382003820038
1020420037150000006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100000071001161119791100001002003820038200382003820038
102042003715000009663119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100000071001161119791100001002003820038200382003820038
10204200371500000156119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100000071001161119791100001002003820038200382003820038
10204200371500000156119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100000071001161119791100001002003820038200382003820038
102042003715000000611968625101001001000010010000500284752112001820037200371842131874510100200100002001000020037200371110201100991001001000010000147080301161119791100001002003820038200382003820038
1020420037150000006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372008511102011009910010010000100000071001161119791100001002003820038200382003820038

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)9fld unit uop (a6)l1d cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
100242003715008919686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100100640316221978610000102003820038200382003820038
100242003715006119686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100103640216221978610000102003820038200382003820038
100242003715006119686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
100242003714906119686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100003640216221978610000102003820038200382003820038
100242003715006119686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
1002420037150061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001001300640216221978610000102003820038200382003820038
100242003715006119686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100420640216221978610000102003820038200382003820038
100242003715006119686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100609640216211978610000102003820038200382003820038
100242003715096119686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
100242003715006119686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000102606640216221978610000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  fcmgt v0.4h, v8.4h, #0
  fcmgt v1.4h, v8.4h, #0
  fcmgt v2.4h, v8.4h, #0
  fcmgt v3.4h, v8.4h, #0
  fcmgt v4.4h, v8.4h, #0
  fcmgt v5.4h, v8.4h, #0
  fcmgt v6.4h, v8.4h, #0
  fcmgt v7.4h, v8.4h, #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 data (08)090e191e1f3f51schedule 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 miss (a1)ld unit uop (a6)l1d cache writeback (a8)a9acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfmap dispatch bubble (d6)dde0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420057150002000504258010810080008100800205006401321200192003820038997706998980120200800322008003220038200381180201100991001008000010000000111511816020035800001002003920039200392003920039
8020420038150000012029258010810080008100800205006401321200192003820038997706998980120200800322008003220038200381180201100991001008000010000000111511816020035800001002003920039200392003920039
802042003815000000029258010810080008100800205006401321200192003820038997706998980120200800322008003220038200381180201100991001008000010000103111511816020035800001002003920039200392003920039
802042003815000000029258010810080008100800205006401320200192003820038997706998980120200800322008003220038200381180201100991001008000010000000111511816020035800001002003920039200392003920039
802042003815000000029258010810080008100800205006401321200192003820038997706998980120200800322008003220038200381180201100991001008000010000000111511816020035800001002003920039200392003920039
802042003815000000029258010810080008100800205006401321200192003820038997706998980120200800322008003220038200381180201100991001008000010000000111511816020035800001002003920039200392003920039
802042003815000000029258010810080008100800205006401321200192003820038997706998980120200800322008003220038200381180201100991001008000010000000111511816020035800001002003920039200392003920039
8020420038150000000292580108100800081008002050064013212001920038200389977069989801202008003220080032200382003811802011009910010080000100032003111511816020035800001002003920039200392003920039
802042003815000000029258010810080008100800205006401321200192003820038997706998980120200800322008003220038200381180201100991001008000010000000111511816020035800001002003920039200392003920039
8020420038150000000219258010810080008100800205006401321200192003820038997706998980120200800322008003220038200381180201100991001008000010000000111511816020035800001002003920039200392003920039

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)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 cache writeback (a8)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0eaeb? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200401500392580010108000010800005064000001200192003820038999631001880010208000020800002003820038118002110910108000010000502041633200350080000102003920039200392003920039
80024200381500392580010108000010800005064000001200192003820038999631001880010208000020800002003820038118002110910108000010100502031644200350080000102003920039200392003920039
80024200381500392580010108000010800005064000000200192003820038999631001880010208000020800002003820038118002110910108000010000502041643200350080000102003920039200392003920039
80024200381500392580010108000010800005064000000200192003820038999631001880010208000020800002003820038118002110910108000010030502051655200350080000102003920039200392003920039
80024200381500392580010108000010800005064000000200192003820038999631001880010208000020800002003820038118002110910108000010000502041654200350080000102003920039200392003920039
80024200381500392580010108000010800005064000001200192003820038999631001880010208000020800002003820038118002110910108000010000502071677200350080000102003920039200392003920039
80024200381500392580010108000010800005064000001200192003820038999631001880010208000020800002003820038118002110910108000010000502051633200350080000102003920039200392003920039
80024200381500392580010108000010800005064000001200192003820038999631001880010208000020800002003820038118002110910108000010100502031634200350080000102003920039200392003920039
80024200381500392580010108000010800005064000001200192003820038999631001880010208000020800002003820038118002110910108000010000502051655200350080000102003920039200392003920039
80024200381500392580010108000010800005064000000200192003820038999631001880010208000020800002003820038118002110910108000010100502041644200350080000102003920039200392003920039