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 (scalar, D)

Test 1: uops

Code:

  sqneg d0, d0
  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
100430372306125472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303722010325472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816003018303730372413328951000100010003037303711100110000073116222629100030383038303830383038
100430372206125472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372206125472510001000100039816003018303730372414328951000100010003037303711100110000075216112629100030383038303830383038
100430372306125472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372206125472510001000100039816003018303730372414328951000100010003037303711100110003373116112629100030383038303830383038
100430372206125472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303723010525472510001000100039816003018303730372413328951000100010003037303711100110000073116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  sqneg d0, d0
  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)09l2 tlb miss data (0b)191e1f3a3f4e51schedule 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)9fld unit uop (a6)l1d cache writeback (a8)acc2branch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102043003722500000006129547251010010010000100100005004277160130018300373003728264328820101002001000020010000300373003711102011009910010010000100000007101161129633100001003003830038300383003830038
1020430037225100012006129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000007101161129633100001003003830038300383003830038
102043003722500000006129547621010010010000100100005004277160130018300373003728264328745101002001000020010000302303003711102011009910010010000100003007101161129633100001003003830038300383003830038
102043003722500001448806129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100003007101161129633100001003022730038300383003830038
102043003722500009006129547251010010010000100100005004277160130018300373003728264328745101002141000020010000300373003711102011009910010010000100000007102161129779100001003003830038300383003830038
102043003722500000006129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000007101161129633100001003003830038300383003830038
102043003722500000006129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000007101161129633100001003003830038300383003830038
102043003722500000006129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373013411102011009910010010000100000007101161129633100001003003830038300383003830038
102043003722500100006129547251010010010032100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000017101161129633100001003018230038300383003830038
102043003722500000006129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000007101161129633100001003003830038300383003830038

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 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)l1d cache writeback (a8)a9acc2branch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)eb? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002430037225000000006129547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000000064041633296290010000103003830038300383003830038
1002430037225000000006129547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000000064031633296290010000103003830038300383003830038
10024300372250000000053629547251001010100001010000504277160030018300373003728286328767100102010000201000030037300371110021109101010000100000000064041633296290010000103003830038300383003830038
100243003722400000000330329493801002013100481110900604282568030018300373003728286328767100102010000201000030037300371110021109101010000100000000064031633296290010000103003830038300383003830038
1002430037225100000006129538251001010100001010000504277160030018300373003728286328767100102010000201000030037300371110021109101010000100000000064031633296290010000103003830038300853003830038
10024300372250001013252806129547251001010100001010000604277160130306303213003728302202882310010201016122106493036830368111002110910101000010423101382620813890512300243010000103055830558305603055630558
1002430369236001612145270407223294572461011119100882011650984293384030018300373022828298328767100102010000201032930561305601111002110910101000010400021669520709966410298323010000103036930038300383003830038
10024300372250004053417611812944825101041510088141165082428797603045030558304612831454289551091322117932210627305583059413110021109101010000102000233590208968901313299533010000103036830417305583068130414
10024303712360000000041929547611001011100161310000504277160030018301323003728286328767100102610000201000030179305021110022109101010000100000030164031633296290010000103003830038300383003830038
1002430037224001000006129547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000000064031633296290010000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  sqneg d0, d8
  sqneg d1, d8
  sqneg d2, d8
  sqneg d3, d8
  sqneg d4, d8
  sqneg d5, d8
  sqneg d6, d8
  sqneg d7, d8
  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)18191e3f51schedule 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)branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0eb? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420061150000009202580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000111511811611200360800001002004020040200402004020040
802042003915011000302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000111511811611200360800001002004020040200402004020040
802042003915011000302580108100800081008002050064013202002020039201139986699908012020080032200800322003920039118020110099100100800001000111511811611200360800001002004020040200402004020040
802042003915001000302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000111511811610200360800001002004020040200402004020040
802042003915011000302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000111511811611200360800001002004020040200402004020040
802042003915011000302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000111511811611200360800001002004020040200402004020040
802042003915011000302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000111511811612200360800001002004020040200402004020040
802042003915011000302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000111511811611200360800001002004020040200402004020040
802042003915011000302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000111511811611200360800001002004020040200402004020040
802042003915011000302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000111511811611200360800001002004020040200402004020040

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)09181e3f51schedule 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 cache writeback (a8)accfd0d2d5map dispatch bubble (d6)ddfetch restart (de)e0eb? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242003915000004025800101080000108000050640000000200202003920039999631001980010208000020800002009020090118002110910108000010019015020001816111220036080000102004020040200402004020040
800242003915000004025800101080000108010350640000010200202003920039999631001980010208000020800002003920039118002110910108000010005020541216121120036080000102004020040200402004020040
800242003915000004025800101080000108000050640000005200202003920039999631001980010208000020800002003920039118002110910108000010005020501016111220036080000102004020040200402004020040
800242003915000004025800101080000108000050640000015200202003920039999631001980010208000020800002003920039118002110910108000010005020501316131520036080000102004020040200402004020040
800242003915000004025800101080000108000050640000005200202003920039999631001980010208000020800002003920039118002110910108000010005020501116131520036080000102004020040200402004020040
800242003915000404025800101080000108000050640000005200202003920039999631001980010208000020800002003920039118002110910108000010005020501116121320036080000102004020040200402004020040
800242003915000004046800101080000108000050640000015200202003920039999631001980010208000020800002003920039118002110910108000010005020041216121120036080000102004020040200402004020040
800242003915000004025800101080000108000050640000010200202003920039999631001980010208000020800002003920039118002110910108000010005020541216131220036080000102004020040200402004020040
800242003915000004025800101080000108000050640000000200202003920039999631001980010208000020800002003920039118002110910108000010005020501216111120036080000102004020040200402004020040
800242003915000004025800101080000108000050640000015200202003920039999631001980010208000020800002003920039118002110910108000010005020501116111120036080000102004020040200402004020040