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

FRINTX (vector, 4H)

Test 1: uops

Code:

  frintx v0.4h, v0.4h
  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)181e1f3a3f4e51schedule 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)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100430372200000008225472510001000100039816013018303730372414328951000100010003037303711100110000000073116112629100030383038303830383038
100430372200000006125472510001000100039816013018303730372414328951000100010003037303711100110000000073116112629100030383038303830383038
100430372200000006125472510001000100039816013018303730372414328951000100010003037303711100110000000073116112629100030383038303830383038
1004303722000000010325472510001000100039816013018303730372414328951000100010003037303711100110000000073116112629100030383038303830383038
100430372200000006125472510001000100039816013018303730372414328951000100010003037303711100110000102638094124112645100030383085308630383085
100430842301011320017725384910001008115039816013054303730372418828951000116211633084303721100110000002618273116112675100030853038308530743085
1004308523111114188110325384210081000100039951213018303730852415328951000116211623084308521100110004042815073116112629100030383038303830383038
100430372300000008425472510001000100039816013018303730372414328951000100010003037303711100110000000073116112629100030383038303830383038
1004303723000000012625472510001000100039816013018303730372414328951000100010003037303711100110000000073116112629100030383038303830383038
10043037220000120025125472510001000100039816013018303730372414328951000100010003037303711100110000000073116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  frintx v0.4h, v0.4h
  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 data (08)1e1f3f4e51schedule 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)ld unit uop (a6)a9acc2branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020430037224025506129547251010010010000100100005004277160030018300373003728271628740101002001000820010008300373003711102011009910010010000100000001117180160029646100001003003830038300383003830038
10204300372240006129547251010010010000100100005004277160130018300373003728271628745101002001000020010000300373003711102011009910010010000100000000007101161129633100001003003830038300383003830038
10204300372250006129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000000007101161129633100001003003830038300383003830038
102043003722501506129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000020007101161129633100001003003830038300383003830038
10204300372250006129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100000000007101161129695100001003003830038300383003830038
10204300372250006129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100000000007101161129633100001003003830038300383003830038
10204300372250006129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100000000007101161129633100001003003830038300383003830038
10204300372250006129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100000000007101161129633100001003003830038300383003830038
10204300372250006129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100001000007101161129633100001003003830038300383003830038
102043003722503072629547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100000000007101161129633100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03l2 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)st unit uop (a7)l1d cache writeback (a8)a9acc2branch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
100243003722500045001032954725100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010000100006402162229629010000103003830038300383003830038
100243003722400012001032954725100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010000103006402162229629010000103003830038300383003830038
1002430037225000600612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000100006402162229629010000103003830038300383003830038
100243003722500036001032954725100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010000103006402162229629010000103003830038300383003830038
1002430037225000000612954725100101010000101000055427716013001830037300372828632876710010201000020100003003730037111002110910101000010020100006402162229629110000103003830038300383008530084
100243003722400048001032953845100191010000101015050427986413005430037300372828632878510010201000020100003003730037111002110910101000010000103006402162229629010000103003830038300383003830038
1002430037225000300612954725100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010000103006402162229629010000103003830038300383003830038
100243003722500036008182954725100101010000101000050427716013001830083300372828632876710010201000020100003003730037411002110910101000010000120006402162229629010000103003830038300383003830038
1002430037225000510038942952015410037181004013104506042812161300183003730037282863287671001020100002010000300373003721100211091010100001024110193082068241012229629010000103003830038300383003830038
100243003722501711708811335294821171002810100001010000504277160130018300373003728286328786112172010000241032430037300371110021109101010000102411225201207482162229629010000103018030038300853017930038

Test 3: throughput

Count: 8

Code:

  frintx v0.4h, v8.4h
  frintx v1.4h, v8.4h
  frintx v2.4h, v8.4h
  frintx v3.4h, v8.4h
  frintx v4.4h, v8.4h
  frintx v5.4h, v8.4h
  frintx v6.4h, v8.4h
  frintx v7.4h, v8.4h
  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)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)acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042003915090302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151184163420036800001002004020040200402004020040
802042003915004102580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151184163320036800001002004020040200402004020040
80204200391500302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151183163320086800001002004020040200402004020040
80204200391506302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151184164320036800001002004020040200402004020040
80204200391500302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151183164420036800001002004020040200402004020040
80204200391500302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151184164320036800001002004020040200402004020040
802042003915030302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151183163420036800001002004020040200402004020040
8020420039150453302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151183164320036800001002004020040200402004020040
80204200391500302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151183163320036800001002004020040200402004020040
80204200391500302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151184163420036800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03181e1f3f51schedule 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
80024200391500120822580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100135020116112003680000102004020040200402004020040
800242003915003604025800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000215020116112003680000102004020040200402004020040
80024200391500270822580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100105020116112003680000102004020040200402004020040
80024200391490300402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100135020116112003680000102004020040200402004020040
8002420039150000822580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100135020116112003680000102004020040200402004020040
800242003915001860822580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100135020116112003680000102004020040200402004020040
80024200391500300402580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100135020116112003680000102004020040200402004020040
80024200391500390822580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100035020116112003680000102004020040200402004020040
800242003915003090822580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100005020116112003680000102004020040200402004020040
8002420039150090402580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100135020116112003680000102004020040200402004020040