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, 8H)

Test 1: uops

Code:

  frintx v0.8h, v0.8h
  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
1004303723010325472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816003018303730372414328951000100010003037303711100110001073116112629100030383038303830383038
100430372206125472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037222471625472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303723010325472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303723010325472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303723010325472510001000100039816013018303730372414328951000100010003037303711100110001073116112629100030383038303830383038
100430372208225472510001000100039816003018303730372414328951000100010003037303711100110001073116112629100030383038303830383038
1004303723126125472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  frintx v0.8h, v0.8h
  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)l2 tlb miss instruction (0a)l2 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)st unit uop (a7)l1d cache writeback (a8)a9acc2branch cond mispred nonspec (c5)branch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
102043003722400000120010329547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000010300071021622296330100001003003830038300383003830038
10204300372250016681661603420294981161017713910040130107506794286624130306301823042528289402883811345226114912221133030416304189110201100991001001000010020022222303400889480342990039100001003036830420304203042130420
102043045522700089107779215823294741781021114010064145112006984287976130342304123041828302472891211341224111642211116530403303678110201100991001001000010002202218898000871489232992135100001003041530418304193027630464
10204303202280108912007920117552947517410196134100641471135069542879761303423023030463282913928855113502301131922211323304583045510110201100991001001000010002201011075000912280342997937100001003046630464304183042130230
1020430465228100881209704052432952018910209148100641441045076742879761301983041730466282903128871110362281066122110996302293032381102011009910010010000100000010300071021622296330100001003003830038300383003830038
10204300372250000012006129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000010300071021622296330100001003003830038300383003830038
102043003722500000120076829547251010010010000100100005004278512130018300373013228264328745101002001000020010000300853003721102011009910010010000100000000282100075821622296330100001003003830038300383003830038
10204300372250000012008229547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100000000300071021622296330100001003003830038300383003830038
102043003722400000120010329547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000010300071021622296330100001003003830038300383003830038
102043003722500000120010329547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000000300071021622296330100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

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)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)9fld unit uop (a6)l1d cache writeback (a8)acc2cdcfl1i cache miss demand (d3)d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
100243003722500000061295472510010101000010100005042771601300183003730037282860328767100102010000201000030037300371110021109101010000100000064002162229629010000103003830038300383003830038
100243003722400000061295472510010101000010100005042771601300183003730037282860328767100102010000201000030037300371110021109101010000100000064002162229629010000103003830038300383003830038
100243003722400000061295472510010101000010100005042771601300183003730037282860328767100102010000201000030037300371110021109101010000100000064002162229629010000103003830038300383003830038
100243003722400000061295472510010101000010100005042771601300183003730037282860328767100102010000201000030037300371110021109101010000100100064002162229629010000103003830038300383003830038
100243003722500000061295472510010101000010100005042771601300183003730037282860328767100102010000201000030037300371110021109101010000100130064002162229629010000103003830038300383003830038
100243003722500000061295472510010101000010100005042771600300183003730037282860328767100102010000201000030037300371110021109101010000100000064002162229629010000103003830038300383003830038
100243003722400000061295472510010101000010100005042771601300183003730037282860328767100102010000201000030037300371110021109101010000100000064002162229629010000103003830038300383003830038
100243003722500000061295472510010101000010100005042771600300183003730037282860328767100102010000201000030037300371110021109101010000100000064002162229629010000103003830038300383003830038
100243003722500000061295472510010101000010100005042771600300183003730037282860328767100102010000201000030037300371110021109101010000100000064002162229629010000103003830038300383003830038
100243003722500000061295472510010101000010100005042771601300183003730037282860328767100102010000201000030037300371110021109101010000100000064002162229629010000103008530038300383003830038

Test 3: throughput

Count: 8

Code:

  frintx v0.8h, v8.8h
  frintx v1.8h, v8.8h
  frintx v2.8h, v8.8h
  frintx v3.8h, v8.8h
  frintx v4.8h, v8.8h
  frintx v5.8h, v8.8h
  frintx v6.8h, v8.8h
  frintx v7.8h, v8.8h
  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)03mmu table walk instruction (07)l2 tlb miss instruction (0a)1e3f51schedule 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
80204200391501112722580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001001611151181161120036800001002004020115201012004020040
80204200391501112722580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001003011151181161120036800001002004020040200402004020040
8020420039150110722580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001002311151181161120036800001002004020040200402004020040
8020420039150113302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001005311151181161120036800001002004020040200402004020040
80204200391501112302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001004011151181161120036800001002004020040200402004020040
80204200391501112722580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001004311151181161120036800001002004020040200402004020040
8020420039150110302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001001011151181161120036800001002004020040200402004020040
8020420039150110302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001001611151181161120036800001002004020040200402004020040
8020420039150110302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001002011151181161120036800001002004020040200402004020040
8020420039150110302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001002011151181161120036800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)0318191e1f3f51schedule 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)acc2branch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420039150000060225800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000450050201016352003680000102004020040200402004020040
80024200391550000402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100063005020516742003680000102004020040200402004020040
800242003915000004025800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000126005020416532003680000102004020040200402004020040
800242003915000004025800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000129005020616532003680000102004020040200402004020040
800242003915500004025800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000114005020516532003680000102004020040200402009320040
80024200391500000402580010108000010800005064000002008320039200399996310019800102080000208000020039200391180021109101080000100093005020416462003680000102004020040200402004020040
800242003915000004025800101080000108000050640000120020200392003999963100198001020800002080000200392003911800211091010800001000141005020516642003680000102004020040200402004020040
800242003915000004025800101080000108000050640000120020200392003999963100198001020800002080000200392003911800211091010800001000138005020316542003680000102004020040200402004020040
800242003915000004025800101080000108000050640000120020200392003999963100198001020800002080000200392003911800211091010800001000150005020316562003680000102004020040200402004020040
800242003915000004025800101080000108000050640000120020200392003999963100198001020800002080000200392003911800211091010800001000144005020316352003680000102004020040200402004020040