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

FRINTX (vector, 4S)

Test 1: uops

Code:

  frintx 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)03mmu table walk data (08)1e3f4e51schedule 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 tlb miss (a1)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100430372301261254725100010001000398160130183037303724143289510001000100030373037111001100001073116112629100030383038303830383038
10043037230061254725100010001000398160130183037303724143289510001000100030373037111001100001073116112629100030383038303830383038
100430372201261254725100010001000398160030183037303724143289510001000100030373037111001100000073116112629100030383038303830383038
100430372300727254725100010001000398160030183037303724143289510001000100030373037111001100000073116112629100030383038303830383038
10043037230061254725100010001000398160030183037303724143289510001000100030373037111001100000373116112664100030383038303830383038
10043037230061254725100010001000398160030183037303724143289510001000100030373037111001100000073116112629100030383038303830383038
10043037230061254725100010001000398160030183037303724143289510001000100030373037111001100000073116112629100030383038303830383038
10043037230061254725100010001000398160030183037303724143289510001000116330373037111001100001073116112629100030383038303830383038
10043037230061254725100010001000398160030183037303724173289510001000100030373037111001100000073116112629100030383038303830383038
100430372202461254725100010001000398160030183037303724143289510001000100030373037111001100000073116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  frintx 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)091e1f3a3f4e51schedule 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)st unit uop (a7)l1d cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102043003722500900010329547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100001037101161129633100001003003830038300383003830038
102043003722500510010329547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000007101161129633100001003003830038300383003830038
102043003722500240010329547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100001037101161129633100001003003830038300383003830038
102043003722500540014729547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100001007101161129633100001003003830038300383003830038
102043003722500420010329547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000037101271129633100001003003830038300383003830038
102043003722500240075129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100001007101161129633100001003003830038300383003830038
102043003722500120010329547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100001007101161129633100001003003830038300383003830038
102043003722400270010329547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100001028207392251129633100001003003830038300383003830038
102043003722511930132171429547251010010010000100100005004277160130018300883003728264728763102612021000020410164300843008511102011009910010010000100101228337101161129633100001003003830038300383003830038
10204300372250000016629547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100001037101161129633100001003003830038300383003830038

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)696b6d6emap 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
1002430037224000030612954725100101010000101000050427716030018030037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038
100243003722400000010402954725100101010000101000050427716030018030037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038
1002430037225000030612954725100101010000101000050427716030018030037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038
1002430037225000000612954725100101010000101000050427716030018030037300372828832876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038
10024300372250000003462954725100101010000101000050427716030018030037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038
1002430037225000000612954725100101010000101000050427716030018030037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038
1002430037225000000612954725100101010000101000050427716030018030037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038
100243003722500001950612954725100101010000101000050427716030018030037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038
1002430037225000000612954725100101010000101000050427716030018330037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038
10024300372240000270612954725100101010000101000050427716030018030037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  frintx v0.4s, v8.4s
  frintx v1.4s, v8.4s
  frintx v2.4s, v8.4s
  frintx v3.4s, v8.4s
  frintx v4.4s, v8.4s
  frintx v5.4s, v8.4s
  frintx v6.4s, v8.4s
  frintx 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)03l2 tlb miss data (0b)181e3f51schedule 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)acc2branch 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
802042005015000277225801081008000810080020500640132120020200392003999776999080120200800322008003220039200391180201100991001008000010002000111511821633200360800001002004020040200402004020040
80204200391500037225801081008000810080020500640132120020200392003999776999080120200800322008003220039200391180201100991001008000010000030111511831634200360800001002004020040200402004020040
802042003915000127225801081008000810080020500640132120020200392003999776999080120200800322008003220039200391180201100991001008000010000130111511831633200360800001002004020040200402004020040
80204200391500037225801081008000810080020500640132120020200392003999776999080120200800322008003220039200391180201100991001008000010000130111511831633200360800001002004020040200402004020040
802042003915000157225801081008000810080020500640132120020200392003999776999080120200800322008003220039200391180201100991001008000010000130111511841634200360800001002004020040200402004020040
802042003915000127225801081008000810080020500640132120020200392003999776999080120200800322008003220039200391180201100991001008000010000130111511841633200360800001002004020040200402004020040
802042003915000127225801081008000810080020500640132120020201392003999776999080120200800322008003220039200391180201100991001008000010000000111511841643200360800001002004020040200402004020040
802042003915000127225801081008000810080020500640132120020200392003999776999080120200800322008003220039200391180201100991001008000010000130111511841634200360800001002004020040200402004020040
802042003915000127225801081008000810080020500640132120020200392003999776999080120200800322008003220039200391180201100991001008000010000130111511831645200360800001002004020040200402004020040
802042003915000123025801081008000810080020500640132120020200392003999776999080120200800322008003220039200391180201100991001008000010000130111511841643200360800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)031e3a3f51schedule 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
800242003915048241258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010005024201615122003680000102004020040200402004020040
80024200391500241258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010005024151615162003680000102004020040200402004020040
80024200391500241258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010005024171614162003680000102004020040200402004020040
80024200391566241258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010005024161616162003680000102004020040200402004020040
80024200391503241258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010005024131610172003680000102004020040200402004020040
800242003915002412580010108000010800005064000012002020039200391001431001980010208000020800002003920039118002110910108000010005024131616182003680000102004020040200992004020040
8002420039150332412580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100050248169172003680000102004020040200402004020040
80024200391500241258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010005024141616142003680000102004020040200402004020040
80024200391500241258001010800001080000566400001200202003920039999631001980010208000020800002003920039118002110910108000010005024161616162003680000102004020040200402004020040
80024200391500241258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010005024151614162003680000102004020040200402004020040