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

FMAXNMV (4S)

Test 1: uops

Code:

  fmaxnmv s0, v0.4s
  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
100430372206125472510001000100039816003018303730372414328951000100010003037303711100110000073216112629100030383038303830383038
1004303723126125472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303723025125472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816003018303730372414328951000100010003037303711100110000973116112629100030383038303830383038
100430372306125472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303723014725472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816013021303730372414328951000100010003037303711100110000373116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  fmaxnmv s0, v0.4s
  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03mmu table walk instruction (07)mmu table walk data (08)l2 tlb miss data (0b)1e1f3a3f4e51schedule 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)a9acc2cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020430037225000000361295472510100100100001001000050042771600300183003730037282643287451010020010000200100003003730037111020110099100100100001000000000071011611296330100001003003830038300383003830038
102043003722500000061295472510100100100001001000050042771601300183003730037282643287451010020010000200100003003730037111020110099100100100001000000000071011611296330100001003003830038300383003830038
102043003722500000061295472510100100100001001000050042771600300183003730037282643287451010020010000200100003003730037111020110099100100100001000000000071011611296330100001003003830038300383003830038
102043003722500000082295472510100100100001001000050042771601300183003730037282643287451010020010000200100003003730037111020110099100100100001000000000071011611296330100001003003830038300383008530274
1020430037225000120061295472510100100100001001000050042771601300183003730037282643287451010020010000200100003003730037111020110099100100100001000000000071011611296330100001003003830038300383003830038
1020430037225000000536295472510100100100001001000050042771601300183003730037282643287451010020010000200100003003730037111020110099100100100001000000000071011611296330100001003003830038300383003830038
102043003722500000061295472510100100100001001000050042771600300183003730037282643287451010020010000200100003003730037111020110099100100100001000000000071011611296330100001003003830038300383003830038
102043003722500000084295472510100100100001001000050042771601300183003730037282649287451056820010000200100003003730037111020110099100100100001004400002071011611296330100001003003830038300383003830038
102043008622500001761170295472510100100100001001000050042771600300183003730037282643287451010020010000204100003003730037111020110099100100100001000000000071011611296330100001003003830038300383003830038
102043003722500000061295472510100100100001001000050042771601300183003730037282643287451010020010000200100003003730037111020110099100100100001000000000171011611296330100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03mmu table walk data (08)09l2 tlb miss data (0b)18191e1f3a3f4e51schedule 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
100243003722400000000612954725100101010000101000050427716003001830037300372828632876710164201000020100003003730037111002110910101000010000000064021611229629010000103003830038300383003830038
10024300372240000000061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
10024300372240000000061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
10024300372250000000061295472510010101000010100005042771601301263003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
1002430037225000005100398295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000000006402492229629010000103003830038300383003830038
10024300372250000000061295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
10024300372240000000061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
10024300372360000000061295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000000306402162229629010000103003830038300383003830038
10024300372250000000061295476210010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
100243003722400000000170295472510010101000010100005042771601300183003730037282863287671001020100002010000300373009811100211091010100001000000006402162229629010000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  fmaxnmv s0, v8.4s
  fmaxnmv s1, v8.4s
  fmaxnmv s2, v8.4s
  fmaxnmv s3, v8.4s
  fmaxnmv s4, v8.4s
  fmaxnmv s5, v8.4s
  fmaxnmv s6, v8.4s
  fmaxnmv s7, v8.4s
  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)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)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)acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfmap dispatch bubble (d6)dde0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200391500302580108100800081008002050064013220020200392003999776999080120200800322008003220039200391180201100991001008000010030111511816020036800001002004020040200402004020040
80204200391500302580108100800081008002050064013220020200392003999776999080120200800322008003220039200391180201100991001008000010000111511816020036800001002004020040200402004020040
80204200391500302580108100800081008002050064013220020200392003999776999080120200800322008003220039200391180201100991001008000010000111511816020036800001002004020040200402004020040
802042003915001562580108100800081008002050064013220020200392003999776999080120200800322008003220039200391180201100991001008000010003111511816020036800001002004020040200402004020040
802042003915001162580108100800081008002050064013220020200392003999776999080120200800322008003220039200391180201100991001008000010000111511816020036800001002004020040200402004020040
80204200391500302580108100800081008002050064013220020200392003999776999080120200800322008003220039200391180201100991001008000010000111511816020036800001002004020040200402004020040
80204200391500302580108100800081008002050064013220020200392003999776999080120200800322008003220039200391180201100991001008000010000111511816020036800001002004020040200402004020040
80204200391500302580108100800081008002050064013220020200392003999776999080120200800322008003220039200391180201100991001008000010000111511816020036800001002004020040200402004020040
80204200391500302580108100800081008002050064013220020200392003999776999080120200800322008003220039200391180201100991001008000010000111511816020036800001002004020040200402004020040
80204200391500302580108100800081008002050064013220020200392003999776999080120200800322008003220039200391180201100991001008000010000111511816020036800001002004020040200402004020040

1000 unrolls and 10 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)191e3f51schedule 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 cache writeback (a8)acc2branch mispred nonspec (cb)cfd2d5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200511500000402580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100000050200151614132003680000102004020040200402004020040
80024200391500000402580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100002050240141611112003680000102004020040200402004020040
80024200391500000402580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100000050240171612122003680000102004020040200402004020040
800242003915000001262580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100000050200131616132003680000102004020040200402004020040
800242003915000001282580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100000050200141616122003680000102004020040200402004020040
800242003915000001472580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100000050200181615122003680000102004020040200402004020040
8002420039150000061258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010000005024014161492003680000102004020040200402004020040
80024200391500000402580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100000050200161617152003680000102004020040200402004020040
80024200391500000402580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100500050260161612162003680000102004020040200402004020040
80024200391500000402580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100000050200121613162003680000102004020040200402004020040