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

SQNEG (vector, 8B)

Test 1: uops

Code:

  sqneg v0.8b, v0.8b
  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)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
1004303722061254725100010001000398160030183037303724143289510001000100030373037111001100000073216112629100030383038303830383038
1004303723082254725100010001000398160130183037303724143289510001000100030373037111001100000073116112629100030383038303830383038
10043037230105254725100010001000398160030183037303724143289510001000100030373037111001100000073116112629100030383038303830383038
1004303722061254725100010001000398160130183037303724143289510001000100030373037111001100000073116112629100030383038303830383038
100430372315661254725100010001150398160130183037303724143289510001000100030373037111001100000073116112629100030383038303830383038
10043037237261254725100010001000398160130183037303724143289510001000100030373037111001100000073116102629100030383038303830383038
10043037220156254725100010001000398160130183037303724143289510001000100030373037111001100000673116112629100030383038303830383038
1004303722061254725100010001000398160030183037303724143289510001000100030373037111001100000073116112629100030383038308630383038
1004303723061254725100010001000398160030183037303724143289510001000100030373037111001100000073116112629100030383038303830383038
100430372334261254725100010001000398160130183037303724143289510001000100030373037111001100000073116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  sqneg v0.8b, v0.8b
  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)0318193a3f4e51schedule 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020430037225000612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000001071011611296330100001003003830038300383003830038
1020430037225000612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000000071011611296330100001003003830038300383003830038
1020430037225000612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000000071011611296330100001003003830038300383003830038
1020430037225000612954725101001001000010010000500427761513001830037300372826432874510100200100002001000030037300371110201100991001001000010000000071011611296330100001003003830038300383003830038
1020430037225000612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000010071011611296330100001003003830084301813008530038
10204300372250004202954725101001001000010010000500427716013001830037300372826432874510100200100002041000030037300371110201100991001001000010000000071011611296330100001003003830038300383003830038
1020430037225000612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000000071011611296330100001003003830038300383003830038
1020430037225000612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000000071011611296330100001003003830038300383003830038
1020430037225000612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000000071011611296332100001003003830038300383003830038
1020430037225000612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000000071011611296330100001003003830038300383003830038

1000 unrolls and 10 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 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)simd uops in schedulers (5a)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)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024300372250010000006129547251001010100001010000500427716003001803003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
10024300372240000000006129547251001010100001010000500427716003001803003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
10024300372250000000006129547251001010100001010000500427716003001803003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
10024300372250000000006129547251001010100001010000500427716003001803003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
100243003722500000019810806129547251001010100001010000500427716003001803003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
10024300372250000000006129547251001010100001010000500427716003001803003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
10024300372250000000006129547251001010100001010000500427716003001803003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
10024300372250000000006129547251001010100001010000500427716003001803003730037282863287671001020100002010000300373003711100211091010100001000000306402162229629510000103037030321303703037030359
1002430414227201177924528014262948415410070141004810109656004285272030234030225303652831229288991029920111382211071303683017771100211091010100001022012194880817117271829881410000103041030369303673036830086
1002430369228612178121760822954725100101010000101000050042771600300180300373003728286328847110632210985221098330369300378110021109101010000104200219275281547311829881210000103037030368303563032330368

Test 3: throughput

Count: 8

Code:

  sqneg v0.8b, v8.8b
  sqneg v1.8b, v8.8b
  sqneg v2.8b, v8.8b
  sqneg v3.8b, v8.8b
  sqneg v4.8b, v8.8b
  sqneg v5.8b, v8.8b
  sqneg v6.8b, v8.8b
  sqneg v7.8b, v8.8b
  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)mmu table walk data (08)191e1f3f51schedule 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)9fl1d tlb access (a0)l1d cache writeback (a8)a9acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042005815000000302580108100800081008002050064013212002020039200399977069990801202008003220080032200392003911802011009910010080000100000011151181160020036800001002004020040200402004020040
8020420039150000210302580108100800081008002050064013212002020039200399977069990801202008003220080032200392003911802011009910010080000100000011151180160020036800001002004020040200402004020040
802042003915000000302580108100800081008002050064013212002020039200399977069990801202008003220080032200392003911802011009910010080000100000011151180160020036800001002004020040200402004020040
8020420039150000001412580108100800081008002050064013212002020039200399977069990801202008003220080032200392003911802011009910010080000100000011151180160020036800001002004020040200402004020040
80204200391500000030258010810080008100800205006401321200202003920039997706999080120200800322008003220039200391180201100991001008000010000013511151180160020036800001002004020040200402004020040
802042003915000030030258010810080008100800205006401321200202003920039997706999080120200800322008003220039200391180201100991001008000010000020411151180160020036800001002004020040200402004020040
802042003915000000302580108100800081008002050064013202006420089200399977069990801202008003220080032200392003911802011009910010080000100000011151180160020036800001002004020040200402004020040
80204200391500000030258010810080008100800205006401320200202003920039997706999080120200800322008003220039200391180201100991001008000010000012911151180160020036800001002004020040200402004020040
802042003915000000302580108100800081008002050064013212002020039200399977069990801202008003220080032200392003911802011009910010080000100000011151180160020036800001002004020040200402004020040
8020420039150000003025801081008000810080020500640132120020200392003999770699908012020080032200800322003920039118020110099100100800001000007211151180160020036800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)0318191e3f51schedule 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)5f6061696d6emap 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)l1d cache writeback (a8)acc2branch mispred nonspec (cb)cfd0d2d5map dispatch bubble (d6)ddfetch restart (de)e0eb? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242003915000040258001010800001080000506400000102002020039200399996310019800102080000208000020039200391180021109101080000100000005038006167520036080000102004020040200402004020196
800242003915000040258001010800001080310506400001102002020039200399996310046800102080319208000020039200393180021109101080000100401421005020005165720036080000102004020040200402004020040
800242004215000040258001010800001080000506400000102002020039200399996310019800102080000208000020039200391180021109101080000100000005020008168820036080000102004020040200402004020040
800242003915000040258001010800001080000506400000102002020039200399996310019800102080000208000020039200391180021109101080000100000005020006165620036080000102004020040200402004020040
800242003915000085258001010800001080000506400000102002020039200399996310019800102080000208000020039200391180021109101080000100000005020007165820036080000102004020040200402004020040
800242003915000640258001010800001080000506400000102002020039200399996310019800102080000208000020039200391180021109101080000100000005020007166820036080000102004020040200402004020040
800242003915600940258001010800001080000506400000102002020039200399996310019800102080000208000020039200391180021109101080000100000005020006166520036080000102004020040200402004020040
800242003915000040258001010800001080000506400000102002020039200399996310019800102080000208000020039200391180021109101080000100000005020007167520036080000102004020040200402004020040
800242003915000040258001010800001080000506400000102002020039200399996310019800102080000208000020039200391180021109101080000100000005020007168820036080000102004020040200402004020040
800242003915000040258001010800001080000506400000102002020039200399996310019800102080000208000020039200391180021109101080000100000005020008166720036080000102004020040200402004020040