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

UQXTN (8H)

Test 1: uops

Code:

  uqxtn v0.8b, 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)033f4e51schedule 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
10043037236125472510001000100039816013018303730372414328951000100010003037303711100110000073216112629100030383038303830383038
10043037226125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037236125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037226125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037229625472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037236125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037236125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037226125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037236125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037226125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  uqxtn v0.8b, 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)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)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)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204300372251621362954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010007101161129633100001003003830038300383003830038
10204300372240612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010007101161129633100001003003830038300383003830038
1020430037225396612954725101001001000010010000500427716013001830177300372826432874510100200100002001000030037300371110201100991001001000010007101161129633100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010007101161129633100001003003830038300383003830038
102043003722424612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010007101161129633100001003003830038300383003830038
1020430037225181032954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010007101161129633100001003003830038300383003830038
10204300372256612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010007101161129705100001003003830038300383003830038
102043003722533612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010007101161129633100001003003830038300383003830038
102043003722512612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010007101161129633100001003003830038300383003830038
1020430037225241932954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010007101161129633100001003003830038300383003830038

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)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
10024300372250000342061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
10024300372250000285061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000010006402162229629010000103003830038300383003830038
100243003722500000061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
100243003722500000061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
10024300842250000327061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
10024300372250000342061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000000006402162229696010000103003830038300383003830038
10024300372250000165061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
10024300372250000345061295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
1002430037225000024061295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
10024300372250000312061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  uqxtn v0.8b, v8.8h
  uqxtn v1.8b, v8.8h
  uqxtn v2.8b, v8.8h
  uqxtn v3.8b, v8.8h
  uqxtn v4.8b, v8.8h
  uqxtn v5.8b, v8.8h
  uqxtn v6.8b, v8.8h
  uqxtn v7.8b, 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)03l2 tlb miss data (0b)18191e1f3a3f51schedule 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)ld unit uop (a6)l1d cache writeback (a8)a9acc2branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfmap dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042005815000018600302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000000001115118160020036800001002004020040200402004020040
80204200391500009300302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000000001115118160020036800001002004020040200402004020040
8020420039150000000302580108100800081008002050064013212007020039200399977699908012020080032200800322003920039118020110099100100800001000010301115153160020036800001002004020040200402004020040
8020420039150000000302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000000001115118160020036800001002004020040200402004020040
80204200391500001200302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000000001115118160020036800001002004020040200402004020040
8020420039150000000302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000000001115118160020036800001002004020040200402004020040
8020420039150000000302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000000001115118160020036800001002004020040200402004020040
8020420039150000000302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000000001115118160020036800001002004020040200402004020040
8020420039150000000722580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000000001115118160020036800001002004020040200402004020040
80204200391500001200302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000000001115118160020036800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03191e1f3f51schedule 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)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)9fl1d cache writeback (a8)accfd5map dispatch bubble (d6)daddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242003915002104025800101080000108000050640000200200200392003999960310019800102080000208000020039200391180021109101080000100050201160112003680000102004020040200402004020040
80024200391500904025800101080000108000050640000200200200392003999960310019800102080000208000020039200391180021109101080000100050201160112003680000102004020040200402004020040
8002420039150026404025800101080000108000050640000200200200392003999960310019800102080000208000020039200391180021109101080000100050201160112003680000102004020040200402004020040
80024200391500004025800101080000108000050640000200200200392003999960310019800102080000208000020039200391180021109101080000100050201160112003680000102004020040200402004020040
80024200391500004025800101080000108000050640000200200200392003999960310019800102080000208000020039200391180021109101080000100050201160112003680000102004020040200402004020040
800242003915001504025800101080000108000050640000200200200392003999960310019800102080000208000020039200391180021109101080000100050201160112003680000102004020040200402004020040
80024200391500004025800101080000108000050640000200200200392003999960310019800102080000208000020039200391180021109101080000100050201160112003680000102004020040200402004020040
800242003915004204025800101080000108000050640000200200200392003999960310019800102080000208000020039200391180021109101080000100050201160112003680000102004020040200402004020040
800242003915006304025800101080000108000050640000200200200392003999960310019800102080000208000020039200391180021109101080000100050201160112003680000102004020040200402004020040
800242003915001204025800101080000108000050640000200200200392003999960310019800102080000208000020039200391180021109101080000100050201160112003680000102004020040200402004020040