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

SQABS (scalar, H)

Test 1: uops

Code:

  sqabs h0, h0
  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)696d6emap 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)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
1004303723082254725100010001000398160301830373037241432895100010001000303730371110011000073116112629100030383038303830383038
1004303722061254725100010001000398160301830373037241432895100010001000303730371110011000073116112629100030383038303830383038
1004303723061254725100010001000398160301830373037241432895100010001000303730371110011000073216112629100030383038303830383038
10043037221261254725100010001000398160301830373037241432895100010001000303730371110011000073116112629100030383038303830383038
1004303723061254725100010001000398160301830373037241432895100010001000303730371110011000073116112629100030383038303830383038
1004303723061254725100010001000398160301830373037241432895100010001000303730371110011000073116112629100030383038303830383038
1004308423061254725100010001000398160301830373037241432895100010001000303730371110011000073116112629100030383038303830383038
1004303723061254725100010001000398160301830373037241432895100010001000303730371110011000073216112629100030383038303830383038
1004303722061254725100010001000398160301830373037241432895100010001000303730371110011000073116112629100030383038303830383038
1004303723061254725100010001000398160301830373037241432895100010001000303730372110011000073116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  sqabs h0, h0
  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)03l2 tlb miss data (0b)1e3f4e51schedule 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
102043003722500612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000071021611296330100001003003830038300383003830038
1020430037225006129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100002471011611296330100001003003830038300383003830038
102043003722500612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000071011611296330100001003003830038300383003830038
102043003722500612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000071011611296330100001003003830038300383003830038
102043003722500612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000071011611296330100001003003830038300383003830038
1020430037225006129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000710116112963317100001003003830038300383003830038
102043003722500612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000071011611296330100001003003830038300383003830038
102043003722400612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000071011611296330100001003003830038300383003830038
102043003722500612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000071011611296330100001003003830038300383003830038
102043003722500612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000071011611296330100001003003830038300383003830038

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
10024300372250000006129547251001010100001010600764285272130234303683037028307282889810915201097922111373036630415811002110910101000010243221960127884735329878310000103032130368303553036930368
10024303572280167924616409729493155100381510056141105060428662403001830369304042831237288961106626111672011140303693032181100211091010100001000000006402162229860310000103036730369303663037030371
100243027422810769246164751294841541005914100561710750874285272030198304163046428317372891911216221134624113053041430415911002110910101000010000002484028305452229973310000103045530415304173041630504
1002430412228111010132988077872949320910101151010415118007142893280304503065130643283333328948118152810972221179930462305021311002110910101000010020703112006402162229845610000103064030514304183050130510
100243054823600000061295472510010101000010100005042771600300183003730037282863287671001020100002010000302273003711100211091010100001000000606402162229667010000103003830038300383003830038
1002430037233000030612954725100101010000101000050427716003001830037300702828632876710010201000020100003003730037111002110910101000010000007806402162229629010000103003830038300383003830038
1002430037233000000612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000008106402162229629010000103003830038300383003830038
1002430037225000000612954725100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010000008106402162229629010000103003830038300383003830038
1002430037225000000612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000002706402162229629010000103003830038300383003830038
1002430037225000000612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000008706402162229629010000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  sqabs h0, h8
  sqabs h1, h8
  sqabs h2, h8
  sqabs h3, h8
  sqabs h4, h8
  sqabs h5, h8
  sqabs h6, h8
  sqabs h7, h8
  movi v8.16b, 9

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.2506

retire uop (01)cycle (02)033f51schedule 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)696d6emap 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)acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042005815030258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000000111511811600200360800001002004020040200402004020040
8020420039150288258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000000111511801600200360800001002004020040200402004020040
802042003915030258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000000111511801600200360800001002004020040200402004020040
8020420039150757258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000000111511801610200360800001002004020040200402004020040
802042003915030258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000000111511801600200360800001002004020040200402004020040
80204200391504781258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000000111511801600200360800001002004020040200402004020040
80204200391613025801081008000810080020500640132200202003920039997769990801202008003220080032200392003911802011009910010080000100000530111511801600200360800001002004020040200402004020090
802042003915030258010810080085100800205006401322002020039200399987699908012020080032200802472003920039118020110099100100800001000000111513504400200360800001002009820112201142010220113
802042011515130258030610280104100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000000111511801600200360800001002004020040200402004020040
802042003915072258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000000111511801600200360800001002004020040200402004020040

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)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)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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242003915000001662580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100005020416442003680000102004020040200402004020040
80024200391500000402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100305020216422003680000102004020040200402004020040
800242003915010004672580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100005020416442003680000102004020040200402004020040
8002420039150000040258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010001115020416422003680000102004020040200402004020040
80024200391500000402580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100005020416242003680000102004020040200402004020040
80024200391500000402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100005020216422003680000102004020040200402004020040
80024200391500000402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100005020216242003680000102004020040200402004020102
80024200391500000402580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100005020416422003680000102004020040200402004020040
800242003915000007052580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100005020216442003680000102004020040200402004020040
80024200391500000402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100005020416422003680000102004020040200402004020040