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, 8H)

Test 1: uops

Code:

  sqneg 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)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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
10043085221272547251008100010003981600301830373037241432895100010001000303730371110011000073216222629100030383038303830383038
1004303722842547251000100010003981600301830373037241432895100010001000303730371110011000073216222629100030383038303830383038
1004303723612547251000100010003981601301830373037241432895100010001000303730371110011000073216222629100030383038303830383038
1004303723612547251000100010003981600301830373037241432895100010001000303730371110011000073216222629100030383038303830383038
1004303723612547251000100010003981600301830373037241432895100010001000303730371110011000073216222629100030383038303830383038
1004303723822547251000100010003981600301830373037241432895100010001000303730371110011000073216222629100030383038303830383038
1004303723822547251000100010003981600301830373037241432895100010001000303730371110011000073216222629100030383038303830383038
1004303723612547251000100010003981600301830373037241432895100010001000303730371110011000073216222629100030383038303830383038
10043037231072547251000100010003981600301830373037241432895100010001000303730371110011000073216222629100030383038303830383038
10043037231052547251000100010003981600301830373037241432895100010001000303730371110011000073216222629100030383038303830383038

Test 2: Latency 1->2

Code:

  sqneg 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)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 tlb access (a0)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204300372240612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000071011611296330100001003003830038300383003830038
102043003722512612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000371011611296330100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716013001830037300862826432874510100200101672061000030037300371110201100991001001000010040371011621296331100001003008630038300383008530038
102043003722507682954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000071011611296330100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000071011611296330100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000071011611296330100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000071011611296330100001003003830038300383003830086
10204300372240612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000071011611296330100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000071011611296330100001003003830038300383003830038
1020430037225010672954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000071011611296330100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03mmu table walk data (08)09l2 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)st unit uop (a7)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024300372250000000612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038
10024300372250000000612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038
100243003722500000120612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038
10024300372250000000612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038
10024300372250000000612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038
10024300372250000000612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038
10024300372250000000612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038
10024300372250000000612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038
100243003722500000120612950213410069141005617101507142866240302703036830372283132728895110642211143241113630319303708110021109101010000100000122198307892416529881310000103036630369303683022630368
10024303722280017710566164585294841521003914100561511050664286624030162303563037128309312889911064221122022113073037030381911002110910101000010000000006822162229845310000103032430357303223036730369

Test 3: throughput

Count: 8

Code:

  sqneg v0.8h, v8.8h
  sqneg v1.8h, v8.8h
  sqneg v2.8h, v8.8h
  sqneg v3.8h, v8.8h
  sqneg v4.8h, v8.8h
  sqneg v5.8h, v8.8h
  sqneg v6.8h, v8.8h
  sqneg 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)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)cdcfmap dispatch bubble (d6)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042006015015302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000311151181620036800001002004020040200402004020040
80204200391500302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040
80204200391503302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040
8020420039150241142580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040
80204200391500302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040
80204200391500302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040
80204200391500302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040
80204200391500302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040
80204200391500302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040
80204200391500302580108100800081008002050064072412002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040

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)l2 tlb miss data (0b)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 tlb access (a0)l1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420039150000046240798010610800001080000506400001200202003920039998931001280010208000020800002003920039118002110910108000010220005020116112003680000102004020040200402004020040
80024200391500035040258001010800001080000506400000200202003920039998931001280010208000020800002003920039118002110910108000010000005020116112003680000102004020040200402004020040
80024200391500000040258001010800001080000506400001200202003920039998931001280010208000020800002003920039118002110910108000010000005020116112003680000102004020040200402004020040
80024200391500000040258001010800001080000506400001200202003920039998931001280010208000020800002003920039118002110910108000010000005020116112003680000102004020040200402004020040
80024200391500000640258001010800001080000506400001200202003920039998931001280010208000020800002003920039118002110910108000010000005020116112003680000102004020040200402004020040
80024200391500000040258001010800001080000506400001200202003920039998931001280010208000020800002003920039118002110910108000010000005020116112003680000102004020040200402004020040
80024200391500000040258001010800001080000506400001200202003920039998931001280010208000020800002003920039118002110910108000010000005020116112003680000102004020040200402004020040
80024200391500000040258001010800001080000506400000200202003920039998931001280010208000020800002003920039118002110910108000010000005020116112003680000102004020040200402004020040
80024200391500000040258001010800001080000506400001200202003920039998931001280010208000020800002003920039118002110910108000010000005020116112003680000102004020040200402004020040
80024200391500000040258001010800001080000506400000200202003920039998931001280010208000020800002003920039118002110910108000010000005020116112003680000102004020040200402004020040