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

FRINTP (vector, 4H)

Test 1: uops

Code:

  frintp v0.4h, v0.4h
  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)03l2 tlb miss instruction (0a)1e1f3f4e51schedule 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)9dld unit uop (a6)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
1004303724000612547251000100010003981600301830373037241432895100010001000303730371110011000001373216222629100030383038303830383038
1004303723000612547251000100010003981600301830373037241432895100010001000303730371110011000000073216222629100030383038303830383038
10043037240006125472510001000100039816013018303730372414328951000100010003037303711100110000015073216222629100030383038303830383038
10043037240088912547251000100010003981601301830373037241432895100010001000303730371110011000000373216222629100030383038303830383038
1004303723000612547251000100010003981600301830373037241432895100010001000303730371110011000000073216222629100030383038303830383038
1004303724000612547251000100010003981601301830373037241432895100010001000303730371110011000000073216222629100030383038303830383038
1004303723000822547251000100010003981600301830373037241432895100010001000303730371110011000000073216222629100030383038303830383038
1004303723000612547251000100010003981601301830373037241432895100010001000303730371110011000000073216222629100030383038303830383038
1004303723000612547251000100010003981600301830373037241432895100010001000303730371110011000000073216222629100030383038303830383038
1004303723000612547251000100010003981600301830373037241432895100010001000303730371110011000000073216222629100030383038303830383038

Test 2: Latency 1->2

Code:

  frintp v0.4h, v0.4h
  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)03181e3f4e51schedule 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)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
102043003723310726295472510100100100001001000050042771600300183003730084282716287411010020010008200100083003730037111020110099100100100001000011171701600296450100001003003830038300383003830038
1020430037233001240295472510100100100001001000050042771600300183003730037282716287411010020010008200100083003730037111020110099100100100001000011171801600296460100001003003830038300383003830038
1020430037233001204295472510100100100001001000050042771601300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
1020430037233001158295472510100100100001001000050042771601300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
1020430037232001089295472510100100100001001000050042771601300183003730037282643287451010020010000200100003003730037111020110099100100100001001300071011611296330100001003003830038300383003830038
102043003723300566295474410127100100001151000050042771601300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
102043003723300922295472510100100100001001000050042771601300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
1020430037232001065295472510100100100001001000050042771601300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
1020430037233001240295472510100100100001001000050042771601300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
1020430037232001037295472510100100100001001000050042771601300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)0318191e3a3f4e51schedule 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 mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002430037225000061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000000640216222962910000103003830038300723003830038
1002430037225000061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001009278100640216222962910000103003830038300383003830038
100243003722500017402295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000000640216222962910000103003830038300383003830038
1002430037225000061295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000000640216222962910000103003830038302263003830038
1002430037225000061295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000000640216222962910000103003830038300383003830038
1002430037225000061295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000000640216222962910000103003830038300383003830038
1002430037225000061295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000000640216222962910000103003830038300383003830038
1002430037225000061295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001003000640216222962910000103003830038300383003830038
100243003722400450061295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000000640216222969410000103003830038301333003830038
1002430037225000061295472510010101000010101505042771600300183003730037282863287671001020100002010000300373003711100211091010100001000000640216222962910000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  frintp v0.4h, v8.4h
  frintp v1.4h, v8.4h
  frintp v2.4h, v8.4h
  frintp v3.4h, v8.4h
  frintp v4.4h, v8.4h
  frintp v5.4h, v8.4h
  frintp v6.4h, v8.4h
  frintp v7.4h, v8.4h
  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 data (08)09181e1f3f51schedule 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)st unit uop (a7)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
80204200391550000030258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000000011151182160020036800001002004020040200402004020040
80204200391550000030258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000000011151180160020080800001002004020040200402004020040
80204200391560000030258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000000011151180160020036800001002004020040200402004020040
80204200391550000030258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000000011151180160020036800001002004020040200402004020040
802042003915500000312258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000000311151180160020036800001002004020040200402004020040
80204200391550000030258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000000011151180160020036800001002004020040200402004020040
80204200391550000030258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000000011151180160020036800001002004020040200402004020040
8020420039155000013230258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000010011151180160020036800001002004020040200402004020040
80204200391550000072258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000000011151180160020036800001002004020040200402004020040
80204200391550000030258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000000011151180160020036800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03l1i tlb fill (04)mmu table walk data (08)1e1f3f51schedule 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420039155101201101258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010000050202716142520036080000102004020040200402004020040
80024200391560000351258001010800001080000506400001200202003920039999631001980010208000020800002008920039118002110910108000010220050202616182320036080000102004020040200402004020040
800242003915500901290258010810800001080107506400001200202003920039999631001980010208000020800002003920039118002110910108000010000350202416262520036080000102004020040200402004020040
80024200391550000359258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010000050202316192620036080000102004020040200402004020040
80024200391550000407258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010000050202716252620036080000102004020040200402004020040
80024200391550000251258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010000050202516252620036080000102004020040200402004020040
80024200391550000191258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010001050202616132820036080000102004020040200402004020040
80024200391550000982258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010000050202516262420036080000102004020040200402004020040
800242003915500001682580010108000010800005064000002002020039200399996121001980010208000020800002003920092118002110910108000010000050202516222320036080000102004020040200402004020040
80024200391550012082258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010000050202616252720036080000102004020040200402004020040