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

FMUL (by element, 2S)

Test 1: uops

Code:

  fmul v0.2s, v0.2s, v1.s[1]
  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)a9c2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100440373036134072510001000100053190814018403740373258338951000100020004037403711100110000073216223473100040384038403840384038
100440373006134072510001000100053190804018403740373258338951000100020004037403711100110000073216223473100040384038403840384038
100440373106134072510001000100053190804018403740373258338951000100020004037403711100110000073216223473100040384038403840384038
100440373006134072510001000100053190804018403740373258338951000100020004037403711100110002073216223473100040384038403840384038
100440373006134072510001000100053190804018403740373258338951000100020004037403711100110000073216223473100040384038403840384038
100440373006134072510001000100053190804018403740373258338951000100020004037403711100110000073216223473100040384038403840384038
1004403730025134072510001000100053190804018403740373258338951000100020004037403711100110000273216223473100040384038403840384038
100440373096134072510001000100053190804018403740373258338951000100020004037403711100110000073216223473100040384038403840384038
100440373006134072510001000100053190804018403740373258338951000100020004037403711100110000073216223473100040384038403840384038
1004403730025134072510001000100053190804018403740373258338951148100020004037403711100110000073216223473100040384038403840384038

Test 2: Latency 1->2

Code:

  fmul v0.2s, v0.2s, v1.s[1]
  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 4.0037

retire uop (01)cycle (02)03l2 tlb miss data (0b)181e3f4e51schedule 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020440037300000613940725101001001000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010000107101161139479100001004003840038400384003840038
1020440037300000613940725101001001000010010000500570690814001840037400373810833874510100200100002002000040037400371110201100991001001000010000107101161139479100001004003840038400384003840038
10204400373000006139407251010010010000100101485005706908140018400374003738108338745101002001000020020000400374003711102011009910010010000100004607101161139479100001004003840038400384003840038
1020440037300000823940725101001001000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010000007101161139479100001004003840038400384003840038
1020440037300000613940725101001001000010010000500570690804001840037400373810833874510100200100002002000040037400841110201100991001001000010000107101161139479100001004003840038400384003840038
1020440037300000613940725101001001000010010000500570690814001840037400373810833874510100200100002002000040037400371110201100991001001000010000107101161139479100001004003840038400384003840038
1020440037300000613940725101001001000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010000207101161139479100001004003840038400384003840038
1020440037300000613940725101181001000010010148500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010000107101161139479100001004003840038400384003840038
1020440037299000613940725101001001000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010000307101161139479100001004003840038400384003840038
1020440037300000613940725101001001000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010000107101161139479100001004003840038400384003840038

1000 unrolls and 10 iterations

Result (median cycles for code): 4.0037

retire uop (01)cycle (02)0318191e3f4e51schedule 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 tlb miss (a1)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024400373000006139407251001010100001010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100000640216223947310000104003840038400384003840038
10024400373000006139407251001010100001010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100000640216223947310000104003840038400384003840038
100244003730000025139407251001010100001010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100010640216223947310000104003840038400384003840038
1002440037299000613940725100101210000101000050570690814001840037400373813033876710010201000020200004003740037111002110910101000010003512640216223947310000104003840038400384003840038
10024400373000006139407251001010100001010000505706908040018400374003738130338767100102010000202000040037400371110021109101010000100013640216223947310000104003840038400384003840038
10024400372990006139407251001010100001010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100030640216223947310000104003840038400384003840038
10024400373000006139407251001010100001010000505706908040018400374003738130338767100102010000202000040037400371110021109101010000100030640216223947310000104003840038400384003840038
10024400373000006139407251001010100001010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100030640216213947310000104003840038400384003840038
100244003730000010539407251001010100181010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100000640216223947310000104003840038400384003840038
10024400373000006139407251001010100001010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100010640216223947310000104003840038400384003840038

Test 3: Latency 1->3

Code:

  fmul v0.2s, v1.2s, v0.s[1]
  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 4.0037

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 cache writeback (a8)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020440037300082394072510100100100001001000051157069081400184003740037381087338745101002001000020020000400374003711102011009910010010000100071011611394790100001004003840038400384003840038
1020440037300061394072510100100100001001000050057069081400184003740037381080338745101002001000020020000400374003711102011009910010010000100071011611394791100001004003840038400384003840038
1020440037300061394072510100100100001001000050057069081400184003740037381080338745101002001000020020000400374003711102011009910010010000100071011611394790100001004003840038400384003840038
1020440037300061394072510100100100001001000050057069081400184003740037381080338745101002001000020020000400374003711102011009910010010000100071011611394790100001004003840038400384003840038
1020440037300061394072510100100100001001000050057069081400184003740037381080338745101002001000020020000400374003711102011009910010010000100071011611394790100001004003840038400384003840038
1020440037299061394072510100100100001001014750057069081400184003740037381080338745101002001000020020000400374003711102011009910010010000100071011611394790100001004003840038400384003840038
1020440037300061394072510100100100001001000050057069081400184003740037381080338745101002001000020020000400374003711102011009910010010000100071011611394790100001004003840038400384003840038
1020440037299061394072510100100100001001000050057069081400184003740037381080338745101002001000020020000400374003711102011009910010010000100071011611394790100001004003840038400384003840038
1020440037300061394072510100100100001001000050057069081400184003740037381080338745101002001000020020000400374003711102011009910010010000100071011611394790100001004003840038400384003840038
1020440037299061394072510100100100001001000050057069081400184003740037381080338745101002001000020020000400374003711102011009910010010000100071011611394790100001004003840038400384003840038

1000 unrolls and 10 iterations

Result (median cycles for code): 4.0037

retire uop (01)cycle (02)0309l2 tlb miss data (0b)1e3a3f4e51schedule 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)696b6d6emap 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 tlb miss (a1)ld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)acc2cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024400373000000613940710110010101000610100005057069084001804003740037381303387671001020100002020000400374003711100211091010100001004000000640216223947310000104003840038400384003840038
10024400373000000726394072510010101000010100005057069084001804003740037381303387671001020100002020000400374003711100211091010100001000000300640216223947310000104003840038400384003840038
10024400372990000209394072510010101000010100005057069084001804003740037381303387671001020100002020000400374003711100211091010100001000000000640216223947310000104003840038400384003840038
1002440037300000061394072510010101000010100005057069084001804003740037381303387671001020100002020000400374003711100211091010100001000000000640216223947310000104003840038400384003840038
1002440037300000061394072510010101000010100005057069084001804003740037381303387671001020100002020000400374003711100211091010100001000000000640216223947310000104003840038400384003840038
1002440037300000061393712510010121000010100005057069084001804003740037381303387671001020100002020000400374003711100211091010100001000000000640216223947310000104003840038400384003840038
1002440037300000061394072510010101000010100005057069084001804003740037381303387671001020100002020000400374003711100211091010100001000003000640216213947310000104003840038400384003840038
10024400372990000726394072510010101000010100005057069084001804003740037381303387671001020101752020000400374003711100211091010100001000000000640216223947310000104003840038400384003840038
1002440037300000061394072510010101000010100005057069084001804003740037381303387671001020100002020000400374003711100211091010100001000000000640216223947310000104003840038400384003840038
1002440037299000061394072510010101000010100005057069084001804003740037381303387671001020100002020000400374003711100211091010100001000003000640216223947310000104003840038400384003840038

Test 4: throughput

Count: 8

Code:

  fmul v0.2s, v8.2s, v9.s[1]
  fmul v1.2s, v8.2s, v9.s[1]
  fmul v2.2s, v8.2s, v9.s[1]
  fmul v3.2s, v8.2s, v9.s[1]
  fmul v4.2s, v8.2s, v9.s[1]
  fmul v5.2s, v8.2s, v9.s[1]
  fmul v6.2s, v8.2s, v9.s[1]
  fmul v7.2s, v8.2s, v9.s[1]
  movi v8.16b, 9
  movi v9.16b, 10

(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)l2 tlb miss data (0b)18191e1f3f51schedule 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 tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042006015000000098625801001008000010080000500640000120021200402004099733999880100200800002001600002004020040118020110099100100800001000000000511031611200370800001002004120041200412004120041
80204200401500000004225801001008000010080000500640000120021200402004099733999880100200800002001600002004020040118020110099100100800001000000000511021611200370800001002004120041200412004120041
802042004015000000080125801001008000010080000500640000120021200402004099733999880100200800002001600002004020040118020110099100100800001000000000511011611200370800001002004120041200412004120041
802042004015000000017225801001008000010080000500640000120021200402004099733999880100200800002001600002004020040118020110099100100800001000000000511011611200370800001002004120041200412004120041
80204200401500000006325801001008000010080000500640000120021200402004099733999880100200800002001600002004020040118020110099100100800001000000000511011611200370800001002004120041200412004120041
8020420040150000000108325801001008000010080000500640000120021200402004099733999880100200800002001600002004020040118020110099100100800001000000000511011611200370800001002004120041200412004120041
802042004015000000049025801001008000010080000500640000120021200402004099733999880100200800002001600002004020040118020110099100100800001000000000511011611200370800001002004120041200412004120041
80204200401500000004225801001008000010080000500640000120021200402004099733999880100200800002001600002004020040118020110099100100800001000000000511011611200370800001002004120041200412004120041
8020420040149000000104425801001008000010080000500640000120021200402004099733999880100200800002001600002004020040118020110099100100800001000000000511011611200370800001002004120041200412004120041
802042004015000000012825801001008000010080000500640000120021200402004099733999880100200800002001600002004020040118020110099100100800001000000000511011611200370800001002004120041200412004120041

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03l1i tlb fill (04)193f51schedule 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)dbddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242004915010127258001010800001080000506400001200212004020040999631002080010208000020160000200402004011800211091010800001000502041633320037080000102004120041200412004120041
80024200401500041258001010800001080000506400001200212004020040999631002080010208000020160000200402004011800211091010800001000502031613320037080000102004120041200412004120041
800242004015000125258001010800001080000506400001200212004020040999631002080010208000020160000200402004011800211091010800001000502031623220037080000102004120041200412004120041
80024200401500041258001010800001080000506400001200212004020040999631002080010208000020160000200402004011800211091010800001000502031603220037080000102004120041200412004120041
80024200401500041258001010800001080000506400001200212004020040999631002080010208000020160000200402004011800211091010800001000502031603320037080000102004120041200412004120041
80024200401500041258001010800001080000506400001200212004020040999631002080010208000020160000200402004011800211091010800001010502031612320037080000102004120041200412004120041
800242004015000106258001010800001080000506400001200212004020040999631002080010208000020160000200402004011800211091010800001000502021614320037080000102004120041200412004120041
80024200401500041258001010800001080000506400001200212004020040999631002080010208000020160000200402004011800211091010800001000502031613220037080000102004120041200412004120041
80024200401500041258001010800841080000506400001200212004020040999631002080010208000020160000200402004011800211091010800001000502031613320037080000102004120041200412004120041
80024200401500041258001010800001080000506400001200212004020040999631002080010208000020160000200402004011800211091010800001000502021613320037080000102004120041200412004120041