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 (vector, 2S)

Test 1: uops

Code:

  fmul v0.2s, v0.2s, v1.2s
  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 cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100440373098234072510001000100053190814018403740373258338951000100020004037403711100110000073216223473100040384038403840384038
100440373006134072510001000100053190814018403740373258338951000100020004037408521100110000073216223473100040384038403840384038
1004403730576134072510001000100053190804018403740373258338951000100020004037403711100110000073216223473100040384038403840384038
100440373006134072510001000100053190804018403740373258338951000100020004037403711100110000073216223473100040384038403840384038
100440373006134072510001000100053190804018403740373258338951000100020004037403711100110000073216223473100040384038403840384038
100440373006134072510001000100053190814018403740373258338951000100020004037403711100110000073216223473100040384038403840384038
100440373006134072510001000100053190804018403740373258338951000100020004037403711100110000073216223473100040384038403840384038
100440373006134072510001000100053190804018403740373258338951000100020004037403711100110000073216223473100040384038403840384038
1004403730061340725100010001000531908040184037403732583389510001000200040374037111001100012073216223473100040384038403840384038
100440373006134072510001000100053190804018403740373258338951000100020004037403711100110000073216223473100040384038403840384038

Test 2: Latency 1->2

Code:

  fmul v0.2s, v0.2s, v1.2s
  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)03191e3f4e51schedule 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)9faccfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020440037300033613940725101001001000010010000500570690814001840037400373810833874510100200100002002000040037400371110201100991001001000010007101161139479100001004003840038400384003840038
1020440037300027613940725101001001000010010000500570690804001840079400373810833874510100200100002002000040037400371110201100991001001000010007101161139479100001004003840038400384003840038
10204400373000357613940725101001001000010010000500570690814001840037400373810833874510100200100002002000040037400371110201100991001001000010007101161139479100001004003840038400384003840038
102044003730000613940725101001001000010010000500570690804001840037400373811233874510100200100002002000040037400371110201100991001001000010007101161139479100001004003840038400384003840038
102044003730000613940725101001021000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010007101161139479100001004003840038400384003840038
102044003730006613940725101001001000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010007101161139479100001004003840038400384003840038
102044003730006613940725101001001000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010007101160139479100001004003840038400384003840038
102044003730000613940725101001001000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010007101161139479100001004003840038400384003840038
10204400373000435613940725101001231000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010007101161139479100001004003840038400384003840038
102044003730010613940738101001001000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010007101161139479100001004003840038400384003840038

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)9faccfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
100244003730000816139407251001010100001010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100640316223947310000104003840038400384003840038
100244003729900246139407251001010100001010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100640216223947310000104003840038400384003840038
10024400373000006139407251001010100001010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100640216223947310000104003840038400384003840038
10024400373000006139407251001010100001010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100640216223947310000104003840038400384003840038
10024400372990066139407251001010100001010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100640416223947310000104003840038400384003840038
10024400373003106139407251001010100001010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100640216223947310000104003840038400384003840038
10024400373000006139407251001010100001010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100640216223947310000104003840038400384003840038
10024400373000006139407251001010100001010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100640216223947310000104003840038400384003840038
10024400373000006139407251001010100001010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100640216223947310000104003840038400384003840038
10024400373000006139407251001010100001010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100640216223947310000104003840038400384003840038

Test 3: Latency 1->3

Code:

  fmul v0.2s, v1.2s, v0.2s
  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)0318191e1f3a3f4e51schedule 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)9facbranch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204400372990012000613940725101001001000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010000071011611394790100001004003840038400384003840038
102044003729900000613940725101001001000010010000500570690814001840037400373810833874510100200100002002000040037400371110201100991001001000010000071011611394790100001004003840038400384003840038
102044003730000000613940725101001001000010010000500570690804001840037400373810833874510100200100002042000040037400371110201100991001001000010000071011611394790100001004003840038400384003840038
102044003730000000613940725101001001000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010000071011611394790100001004003840038400384003840038
1020440037300000007263940725101001001000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010000071011611394790100001004003840038400384003840038
1020440037300004800613940725101001001000010010000500570690814001840037400373810833874510100200100002002000040037400371110201100991001001000010000071011611394790100001004003840038400384003840038
102044003730000000613940725101001001000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010000071011611394790100001004003840038400384003840038
102044003730000000613940725101001001000010010000500570690814001840037400373810833874510100200100002002000040037400371110201100991001001000010000071011611394790100001004003840038400384003840038
102044003730000000613940725101001001000010010000500570690814001840037400373810833874510100200100002002000040037400371110201100991001001000010000071011611394790100001004003840038400384003840038
102044003730000000613940725101001001000010010000500570690814001840037400373810833874510100200100002002000040037400371110201100991001001000010000071011611394790100001004003840038400384003840038

1000 unrolls and 10 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)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 tlb access (a0)l1d cache writeback (a8)branch cond mispred nonspec (c5)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002440037299061394072510010101000010100005057069080400180400374003738130338767100102010000202000040037400371110021109101010000100000640216223947310000104003840038400384003840038
10024400373000726394072510010101000010100005057069080400180400374003738130338767100102010000202000040037400371110021109101010000100000640216223947310000104003840038400384003840038
1002440037300061394072510010101000010100005057069080400180400374003738130338767100102010000202000040037400372110021109101010000100000640216223947310000104003840038400384003840038
1002440037300061394072510010101000010100005057069081400180400374003738130338767100102010000202000040037400371110021109101010000100012640216223947310000104003840038400384003840038
1002440037300061394072510010101000010100005057069081400180400374003738130338767100102010000202000040037400371110021109101010000100000640216223947310000104003840038400384003840038
1002440037300061394072510010101000010100005057069080400180400374003738130338767100102010000202000040037400371110021109101010000100100640216223947310000104003840038400384003840038
10024400372990536394072510010101000010100005057069081400180400374003738130338767100102010000202000040037400371110021109101010000100000640216223947310000104003840038400384003840038
1002440037299061394072510010101000010100005057069081400180400374003738130338767100102010000202000040037400371110021109101010000100000640216223947310000104003840038400384003840038
10024400373001861394072510010101000010100005057069081400180400374003738130338767100102010000202000040037400371110021109101010000100000640216223947310000104003840038400384003840038
1002440037300061394072510010101000010100005057069081400180400374003738130338767100102010000202000040037400371110021109101010000100010640216223947310000104003840038400384003840038

Test 4: throughput

Count: 8

Code:

  fmul v0.2s, v8.2s, v9.2s
  fmul v1.2s, v8.2s, v9.2s
  fmul v2.2s, v8.2s, v9.2s
  fmul v3.2s, v8.2s, v9.2s
  fmul v4.2s, v8.2s, v9.2s
  fmul v5.2s, v8.2s, v9.2s
  fmul v6.2s, v8.2s, v9.2s
  fmul v7.2s, v8.2s, v9.2s
  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)031e1f3f51schedule 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420059150004225801001008000010080000500640000200212004020040997339998801002008000020016000020040200401180201100991001008000010000511021611200370800001002004120041200412004120041
802042004015024904225801001008000010080000500640000200212004020040997339998801002008000020016000020040200401180201100991001008000010000511011611200370800001002004120041200412004120041
8020420040150004225801001008000010080000500640000200212004020040997339998801002008000020016000020040200401180201100991001008000010000511011611200370800001002004120041200412004120041
8020420040150004225801001008000010080000500640000200212004020040997339998801002008000020016000020040200401180201100991001008000010000511011611200370800001002004120041200412004120041
8020420040150004225801001008000010080000500640000200212004020040997339998801002008000020016000020040200401180201100991001008000010000511011611200370800001002004120041200412004120041
80204200401500063258010010080000100800005006400002002120040200409973399988010020080000200160000200402004011802011009910010080000100005110116112003722800001002009320041200412004120104
8020420040150004225801001008000010080000500640000200212004020040997339998801002008000020016000020040200401180201100991001008000010000511021611200370800001002004120041200412004120041
8020420102151004225801001008000010080000500640000200212004020040997339998801002008000020016000020040200401180201100991001008000010010511011611200370800001002004120041200412004120041
8020420040150004225801001008000010080000524640000200212004020040997339998801002008000020016000020040200401180201100991001008000010000511011611200370800001002004120041200412004120041
802042004015026404225801001008000010080000500640000200212004020040997339998801002008000020016000020040200401180201100991001008000010000511011611200370800001002004120041200412004120041

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? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420049150041258001010800001080000506400000200210200402004099963100208001020800002016000020040200401180021109101080000103050205163320037080000102004120041200412004120041
8002420040150270365258001010800001080000506400000200210200402004099963100208001020800002016000020040200401180021109101080000100050203163220037080000102004120041200412004120041
8002420040150041258001010800001080000506400000200210200402004099963100208001020800002016000020040200401180021109101080000100050203163620037080000102004120041200412004120041
8002420040150041258001010800001080000506400000200210200402004099963100208001020800002016000020040200401180021109101080000100050203162320037080000102004120041200412004120041
8002420040150041258011410801011080000506400000200210200402004099963100208001020800002016000020040200401180021109101080000100050203163620037080000102004120041200412004120041
800242004015001871258001010800001080000606400001200210200402004099963100208001020800002016000020040200401180021109101080000100050203162320037080000102004120041200412004120041
8002420040150041258001010800001080000506400001200210200402004099963100208001020800002016000020040200401180021109101080000100050203163320037080000102004120041200412004120041
8002420040150041258001010800001080000506400001200210200402004099963100208001020800002016000020040200401180021109101080000100050205166320037080000102004120041200412004120041
8002420040150641258001010800001080000506400001200210200402004099963100208001020800002016000020040200401180021109101080000100050203162320037080000102004120041200412004120041
8002420040150041258001010800001080000506400001200210200402004099963100208001020800002016000020040200401180021109101080000100050206162320037080000102004120041200412004120041