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

FCMEQ (vector, zero, 2D)

Test 1: uops

Code:

  fcmeq v0.2d, v0.2d, #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)03mmu table walk data (08)09l2 tlb miss data (0b)18191e1f3f4e51schedule 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)ld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100420371600000120611686251000100010002645211201820372037157131895100010001000203720371110011000000000073116111786100020382038203820382038
10042037160000000611686251000100010002645211201820372037157131895100010001000203720371110011000000000073116111786100020382038203820382038
10042037150000000611686251000100010002645211201820372037157131895100010001000203720371110011000000002085073116111786100020382038203820382038
10042037150000000611686251000100010002645211201820372037157131895100010001000203720371110011000000000073116111786100020382038203820382038
10042037150000000611686251000100010002645211201820372037157131895100010001000203720371110011000000000073116111786100020382038203820382038
10042037150000000611686251000100010002645211201820372037157131895100010001000203720371110011000000000073116111786100020382038203820382038
10042037150000000611686251000100010002645211201820372037157131895100010001000203720371110011000000000073116111786100020382038203820382038
10042037150000000611686251000100010002645211201820372037157131895100010001000203720371110011000000000073116111786100020382038203820382038
10042037150000000611686251000100010002645211201820372037157131895100010001000203720371110011000000000073116111786100020382038203820382038
10042037150000000611686251000100010002645211201820372037157131895100010001000203720371110011000000000073116111786100020382038203820382038

Test 2: Latency 1->2

Code:

  fcmeq v0.2d, v0.2d, #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)030918191e3f4e51schedule 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
1020420037150000021019686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
102042003715000006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
10204200371500000104019686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
10204200371500000536196862510100100100001001000050028475210200182003720037184213187451010020010000200100002003720037111020110099100100100001004807101161119791100001002003820038200382003820038
102042003715000006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
102042003715010006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
102042003715000006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
102042003715000006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037150000012419686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
102042003715000006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038

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 miss (a1)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
100242003715001261968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010000640716331978610000102003820038200382003820038
10024200371500611968625100101510000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010000640316331978610000102003820038200382003820038
10024200371500611968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010000640316331978610000102003820038200382003820038
100242003715003611968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010006640316331978610000102003820038200382003820038
10024200371500821968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010000640316331978610000102003820038200382003820038
10024200371500611968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010000640316331978610000102003820038200382003820038
10024200371500611964225100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010000640316331978610000102003820038200382003820038
100242003715001561968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010000640316331978610000102003820038200382003820038
10024200371500611968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010000640316331978610000102003820038200382003820038
100242003715001261968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010000640316331978610000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  fcmeq v0.2d, v8.2d, #0
  fcmeq v1.2d, v8.2d, #0
  fcmeq v2.2d, v8.2d, #0
  fcmeq v3.2d, v8.2d, #0
  fcmeq v4.2d, v8.2d, #0
  fcmeq v5.2d, v8.2d, #0
  fcmeq v6.2d, v8.2d, #0
  fcmeq v7.2d, v8.2d, #0
  movi v8.16b, 9

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.2506

retire uop (01)cycle (02)030f1e3f51schedule 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)c2branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420058150201342580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000011151180160020035800001002003920039200392003920039
802042003815000292580108100800081008002050064013202001920038200389977699898012020080032200800322008920038118020110099100100800001000011151180160020035800001002003920039200392003920039
802042003815000292580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000011151180160020035800001002003920039200392003920039
802042003815000712580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000011151180160020035800001002003920039200392003920039
802042003815000292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151180160020035800001002003920039200392003920039
802042003815000292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151180160020035800001002003920039200392003920039
802042003815000292580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000011151180160020035800001002003920039200392003920039
802042003815000292580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000011151180160020035800001002003920039200392003920039
802042003815000712580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151180160020035800001002003920039200392003920039
802042003815000502580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000011151180160020035800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03181e3f51schedule 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)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)9fld unit uop (a6)l1d cache writeback (a8)a9acc2branch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0eaeb? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420050150003925800101080000108000050640000200192003820038999603100188001020800002080000200382003811800211091010800001000000050201416572003533080000102003920039200392003920039
800242003815000392580010108000010800005064000020019200382003899960310018800102080000208000020038200382180021109101080000100100005020616572003516080000102003920039200392003920039
800242003815000392580010108000010800005064000020019200382003899960310018800102080097208000020101200381180021109101080000100000005020416511200350080000102003920039200392003920039
8002420038150003925800101080000108000050640000200192003820038999603100188001020800002080000200382003811800211091010800001000060050201116411200350080000102003920039200392003920039
800242003815000704258001010800001080000506400002001920038200389996031001880010208000020800002003820038118002110910108000010000000502091635200350080000102003920039200392003920039
80024200381500039258001010800001080000506400002001920038200389996031001880010208000020800002003820038118002110910108000010000000502051656200350080000102003920039200392003920039
800242003815000392580010108000010800005064000020019200382003899960310018800102080000208000020038200381180021109101080000100000005020101610102003520080000102003920039200392003920039
800242003815000392580010108000010800005064000020019200382003899960310018800102080000208000020038200381180021109101080000100000005020516511200350080000102003920039200392003920039
800242003815000392580010108000010800005064000020019200382003899960310018800102080000208000020038200381180021109101080000100000005020516116200350080000102003920039200392003920039
800242003815000392580010108000010800005064000020019200382003899960310018800102080000208000020038200381180021109101080000100000005020416510200350080000102003920039200392003920039