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, 2D)

Test 1: uops

Code:

  fmul v0.2d, v0.2d, v1.d[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)l1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100440373006134072510001000100053190804018403740373258338951000100020004037403711100110000000073116113473100040384038403840384038
1004403730025134072510001000100053190804018403740373258338951000100020004037403711100110000000073116113473100040384038403840384038
100440373006134072510001000100053190804018403740373258338951000100020004037403711100110000000073116113473100040384038403840384038
100440373006134072510001000100053190814018403740373258338951000100020004037403711100110000000073116113473100040384038403840384038
100440373006134072510001000100053190804018403740373258338951000100020004037403711100110000000073116113473100040384038403840384038
100440373006134072510001000100053190804018403740373258338951000100020004037403711100110000010073116113473100040384038403840384038
1004403730014534072510001000100053190814018403740373258338951000100020004037403711100110000000073116113473100040384038403840384038
10044037300128340725100010001000531908040184037403732583389510001000200040374037111001100000220073116113473100040384038403840384038
1004403730306134072510001000100053190814018403740373258338951000100020004037403711100110000210073116113473100040384038403840384038
100440373006134072510001000100053190814018403740373258338951000100020004037403711100110000000073116113473100040384038403840384038

Test 2: Latency 1->2

Code:

  fmul v0.2d, v0.2d, v1.d[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)03mmu table walk data (08)091e1f3f4e51schedule 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? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020440037300003570613940725101001001000012710000500570690814001840037400373810833874510100200100002002000040037400371110201100991001001000010000071021611394790100001004003840038400384008040038
102044003730000180613940725101001001000010010592500570690814001840037400373810833874510100200100002002000040037400371110201100991001001000010000071011611394790100001004003840038400384003840038
1020440037299012730613940725101001001000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010001971011611394790100001004003840038400384003840038
102044003730000930613940725101001001000010010000500570690804015840037400373810833874510100200100002002000040037400371110201100991001001000010001071011611394790100001004008640086400384003840038
1020440037300003060613940725101001001000010010000500570690804001840085400373810833874510100204100002002041240084400371110201100991001001000010000071011611394790100001004003840038400384003840038
10204402303000063521033940725101001001000010010000500570690804001840037400373810833874510100200100002002033240037400371110201100991001001000010000071011611394790100001004003840038400384003840038
10204400373000037201243940725101001001000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010000071011611396220100001004003840038400384003840038
102044003730000660103394071031010010010000100100005005706908040018400374003738108193874510100200100002002000040037400371110201100991001001000010000071011611394790100001004003840038400384003840038
10204400373000132701033940725101001001000010010000500570690814001840037400373812233874510100200100002002000040037400371110201100991001001000010000071031611394790100001004003840038400384003840038
10204400843000130180613940725101001001000011010000500570854214005340084400853810833874510253200100002002000040037400371110201100991001001000010000071011611394790100001004003840038400384003840038

1000 unrolls and 10 iterations

Result (median cycles for code): 4.0037

retire uop (01)cycle (02)03mmu table walk data (08)l2 tlb miss data (0b)18191e1f3f4e51schedule 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 tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)acc2c3cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
100244003730000001800613940725100101010000101000050570690814001804003740037381303387671001020100002020000400374003711100211091010100001000000006402162239473010000104003840038400384003840038
10024400373000000330613940725100101010000101000050570690814001804003740037381303387671001020100002020000400374003711100211091010100001000000006402162239473010000104003840038400384003840038
10024400373000000690613940725100101010000101000050570690814001804003740037381303387671001020100002020000400374003711100211091010100001000000006402162239473010000104003840038400384003840038
1002440037299000027909643940725100101010000101000050570690814001834003740037381303387671001020100002020000400374003711100211091010100001000000006402162239473010000104003840038400384003840038
10024400372990000300613940725100101010000101000050570690814001804003740037381303387671001020100002020000400374003711100211091010100001000000006402162239473010000104003840038400384003840038
100244003730000003390613940725100101010000101000050570690814001804003740037381303387671001020100002020000400374003711100211091010100001000000006402162239473010000104003840038400384003840038
10024400373000000690613940725100101010000101000050570690814001804003740037381303387671001020100002020000400374003711100211091010100001000000006402162239473010000104003840038400384003840038
10024400373000000300843940725100101010000101000050570690814001804003740037381303387671001020100002020000400374003711100211091010100001000000006402162239473010000104003840038400384003840038
10024400373000000210613940725100101010000101000050570690814001804003740037381303387671001020100002020000400374003711100211091010100001000000006402162239473010000104003840038400384003840038
10024400372990000240613940725100101010000101000050570690814001804003740037381303387671001020101632020324400374003711100211091010100001000000006402162239473010000104003840038400384003840038

Test 3: Latency 1->3

Code:

  fmul v0.2d, v1.2d, v0.d[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)03mmu table walk data (08)l2 tlb miss data (0b)1e3f4e51schedule 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)acbranch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
102044003729900186139407251010010010000100100005005706908040018400374003738108338745101002001000020020000400374003711102011009910010010000100000071011611394790100001004003840038400384003840038
10204400373000006139407251010010010000100100005005706908140018400374003738108338745101002001000020020000400374003711102011009910010010000100000071011611394790100001004003840038400384003840038
10204400372990006139407251010010010000100100005005706908040018400374003738108338745101002001000020020000400374003711102011009910010010000100000071011611394790100001004003840038400384003840038
10204400373000006139407251010010010000100100005005706908140018400374003738108338745101002001000020020000400374003711102011009910010010000100000071011611394790100001004003840038400384003840038
10204400373000006139407251010010010000100100005005706908140018400374003738108338745101002001000020020000400374003711102011009910010010000100000171011611394790100001004003840038400384003840038
10204400373000006139407251010010010000100100005005706908140018400374003738108338745101002001000020020000400374003711102011009910010010000100000071011611394790100001004003840038400384003840038
10204400373000006139407251010010010000100100005005706908140018400374018038108338745101002001000020020000400374003711102011009910010010000100000071011611394790100001004003840038400384003840038
10204400373000006139407251010010010000100100005005706908140018400374003738108338745101002001000020020000400374003711102011009910010010000100000071011611394790100001004003840038400384003840038
102044003729900396139407251010010010000100100005005706908140018400374003738108338745101002001000020020000400374003711102011009910010010000100000071011611394790100001004003840038400384003840038
10204400373000006139407251010010010000100100005005706908140018400374003738108338745101002001000020020000400374003711102011009910010010000100000071011611394790100001004003840038400384003840038

1000 unrolls and 10 iterations

Result (median cycles for code): 4.0037

retire uop (01)cycle (02)0309191e1f3f4e5051schedule 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)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024400372990060613940702510010101000010100005057069084001840037400373813033876710010201000020200004003740037111002110910101000010000640316223947310000104003840038400384003840038
10024400372990000613940702510010101000010100005057069084001840037400373813033876710010201000020200004003740037111002110910101000010000640216223947310000104003840038400384003840038
10024400373000000613940702510010101000010100005057069084001840037400373813033876710010201000020200004003740037111002110910101000010102640216223947310000104003840038400384003840038
10024400373000000613940702510010101000010100005057069084001840037400373813033876710010201000020200004003740037111002110910101000010000640216223947310000104003840038400384003840038
10024400373000000613940702510010101000010100005057069084001840037400373813033876710010201000020200004003740037111002110910101000010000640216223947310000104003840038400384003840038
10024400373000000613940702510010101000010100005057069084001840037400373813033876710010201000020200004003740037111002110910101000010000640216223947310000104003840038400384003840038
10024400373000000613940702510010101000010100005057069084001840037400373813033876710010201000020200004003740037111002110910101000010000640216223947310000104003840038400384003840038
10024400373000000613940702510010101000010100005057069084001840037400373813033876710010201000020200004003740037111002110910101000010000640216223947310000104003840038400384003840038
10024400773000000613940702510010101000010100005057069084001840037400373813033876710010201000020200004003740037111002110910101000010000640216223947310000104003840038400384003840038
10024400372990000613940702510010101000010100005057069084001840037400373813033876710010201000020200004003740037111002110910101000010000640216223947310000104003840038400384003840038

Test 4: throughput

Count: 8

Code:

  fmul v0.2d, v8.2d, v9.d[1]
  fmul v1.2d, v8.2d, v9.d[1]
  fmul v2.2d, v8.2d, v9.d[1]
  fmul v3.2d, v8.2d, v9.d[1]
  fmul v4.2d, v8.2d, v9.d[1]
  fmul v5.2d, v8.2d, v9.d[1]
  fmul v6.2d, v8.2d, v9.d[1]
  fmul v7.2d, v8.2d, v9.d[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)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)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200591500000004225801001008000010080000500640000200210200402004099733999880100200800002001600002004020040118020110099100100800001000000000511021611200370800001002004120041200412004120041
80204200401500000004225801001008000010080000500640000200210200402004099733999880100200800002001600002004020040118020110099100100800001000000090511011611200370800001002004120041200412004120041
80204200401500000004225801001008000010080000500640000200210200402004099733999880100200800002001600002004020040118020110099100100800001000000000511011611200370800001002004120041200412004120041
80204200401500000004225801001008000010080000500640000200210200402004099738999880100200800002001600002004020040118020110099100100800001000000000511011611200370800001002004120041200412004120105
80204200401500000004225801001008000010080000500640000200213200402004099733999880100200800002001600002004020040118020110099100100800001000000000511011611200370800001002004120041200412004120041
80204200401500000004225801001008000010080000500640000200210200402004099733999880100200800002001600002004020040118020110099100100800001000000000511011611200370800001002004120041200412004120041
8020420040150000000422580100100800001008000050064000020021020040200409973399988010020080000200160000200402004011802011009910010080000100000101380511011611200370800001002004120041200412004120041
80204200401500000004225801001008000010080000500640000200210200402004099733999880100200800002001600002004020040118020110099100100800001000000000511011611200370800001002004120041200412004120041
802042004015000003604225801001008000010080000500643320200210200402004099733999880100200800002001600002004020040118020110099100100800001000000000511011611200370800001002004120041200412004120041
80204200401500000004225801001008000010080000500640000200210200402004099733999880100200800002001600002004020040118020110099100100800001000000000511011611200370800001002004120041200412004120041

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)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)9fst unit uop (a7)l1d cache writeback (a8)accdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420049150096244800101080000108000050640000020021020201200409996310020800102080000201600002004020040218002110910108000010000050204162420037080000102004120041200412004120041
8002420040150004125800101080000108000050640000020021020040200409996310020800102080000201600002004020040118002110910108000010000050204162420037080000102004120041200412004120041
80024200401500041258001010800001080000506400001200210200402004099963100208001020800002016000020040200401180021109101080000100343050202164420037080000102004120041200412004120041
80024200401500041258001010800001080000506400001200210200402004099963100208001020800002016000020040200401180021109101080000100270150202162420037080000102004120041200412004120041
8002420040150004125800101080000108000050640000120021020146200409996310020800102080000201600002004020040118002110910108000010000050204164220037080000102004120041200412011420041
8002420040150008225800101080000108000050640000020021020040200409996310020800102080000201600002004020040118002110910108000010010050202162420037080000102004120041200412004120041
8002420040150004125800101080000108000050640000020021020040200409996310020800102080000201600002004020040118002110910108000010003050204164220037080000102004120041200412004120041
8002420040150004125800101080000108000050640000020021020040200409996310020800102080000201600002004020040118002110910108000010000050202162420037080000102004120041200412004120041
80024200401500083258001010800001080000506400000200210200402004099967100208001020800002016020820040200401180021109101080000100018050202162420037080000102004120041200412004420041
8002420040150115125258001010800001080314506400001200210200402004099963100208001020800002016000020040200401180021109101080000100240050202164420037080000102004120041200412004120041