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 (vector, 4S)

Test 1: uops

Code:

  sqabs v0.4s, v0.4s
  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
1004303723061254725100010001000398160301830373037241432895100010001000303730371110011000073116112629100030383038303830383038
1004303722061254725100010001000398160301830373037241432895100010001000303730371110011000073116112629100030383038303830383038
1004303723061254725100010001000398160301830373037241432895100010001000303730371110011000073116112629100030383038303830383038
10043037220124254725100010001000398160301830373037241432895100010001000303730371110011000073116112629100030383038303830383038
1004303723061254725100010001000398160301830373037241432895100010001000303730371110011000073116112629100030383038303830383038
1004303723061254725100010001000398160301830373037241432895100010001000303730371110011000073116112629100030383038303830383038
1004303722061254725100010001000398160301830373037241432895100010001000303730371110011000073116112629100030383038303830383038
1004303723061254725100010001000398160301830373037241432895100010001000303730371110011000073116112629100030383038303830383038
1004303723061254725100010001000398160301830373037241432895100010001000303730371110011000073116112629100030383038303830383038
1004303722661254725100010001000398160301830373037241432895100010001000303730371110011000073116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  sqabs v0.4s, v0.4s
  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)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 cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020430037224000306129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
1020430037225000006129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
1020430037225000006129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
10204300372250002706129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
1020430037225000006129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
1020430037225000006129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102021009910010010000100007101161129633100001003003830038300383003830038
1020430037225000006129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
1020430037225000006129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
1020430037225000006129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373008411102011009910010010000100007101161129633100001003003830038300383003830038
1020430037225000006129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038

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)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)l1d cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
100243003722500002100612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000006404163329629010000103003830038300383003830038
10024300372250000000612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000006403163329629010000103003830038300383003830038
10024300372250000600612954725100101010000101000050427716003001830037300372830232876710010201000020100003003730037111002110910101000010000006403163329629010000103003830038300383003830038
10024300372250000000612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000006403163329629010000103003830038300383003830038
10024300372250000000612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000006403163329629010000103003830038300383003830038
10024300372250000000612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000006403163329629010000103003830038300383003830038
10024300372250000000612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000006403163329698010000103003830038300383003830038
10024300372250000000612954725100101010000101000050427716003001830037300372829032876710010201000020100003003730037111002110910101000010000006403163329629010000103003830038300383003830038
100243003722500001200612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000006403163329629010000103003830038300383003830038
10024300372250000000612954725100101010000101000050427716003001830082300372828632876710010201000020100003003730037111002110910101000010000006403163329629010000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  sqabs v0.4s, v8.4s
  sqabs v1.4s, v8.4s
  sqabs v2.4s, v8.4s
  sqabs v3.4s, v8.4s
  sqabs v4.4s, v8.4s
  sqabs v5.4s, v8.4s
  sqabs v6.4s, v8.4s
  sqabs v7.4s, v8.4s
  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
802042006015051302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040
80204200391500302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040
80204200391500302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040
80204200391500512580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001001011151181620036800001002004020040200402004020040
80204200391500302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040
80204200391500302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040
80204200391500302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040
80204200391500302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040
80204200391500302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040
802042003915033302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040

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)091e3f51schedule 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420050150000402580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100050201016582003680000102004020040200402004020040
800242003915000040258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010005020616592003680000102004020040200402004020040
8002420039150000402580090108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100050201016992003680000102004020040200402004020040
8002420039150000402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100050208161552003680000102004020040200402004020040
8002420039150020402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000101050207161282003680000102004020040200402004020040
800242003915000040258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010005020716752003680000102004020040200402004020040
8002420039150000402580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100050207161052003680000102004020040200402004020040
8002420039150000402580010108000010800005064000012002020039200399996310019800102080000208000020039200891180021109101080000100650205166102003680000102004020040200402004020040
800242003915000040258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010005020616842003680000102004020040200402004020040
800242003915000040258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010035020716862003680000102004020040200402004020040