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, 8H)

Test 1: uops

Code:

  sqabs 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)03l2 tlb miss data (0b)1e3a3f4e51schedule 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
100430372200266254725100010001000398160130183037303724143289510001000100030373037111001100000077416442629100030383038303830383038
100430372300266254725100010001000398160130183037303724143289510001000100030373037111001100000077416442629100030383038303830383038
100430372200266254725100010001000398160030183037303724143289510001000100030373037111001100000077416442629100030383038303830383038
100430372300266254725100010001000398160130183037303724143289510001000100030373037111001100000077416442629100030383038303830383038
100430372300266254725100010001000398160030183037303724143289510001000100030373037111001100000077416442629100030383038303830383038
1004303722002161254725100010001000398160030183037303724143289510001000100030373037111001100000077416442629100030383038303830383038
100430372200266254725100010001000398160030183037303724143289510001000100030373037111001100000077416442629100030383038303830383038
100430372200266254725100010001000398160130183084308424143289510001000100030373037111001100000077416442629100030383038303830383038
100430372300266254725100010001000398160130183037303724143289510001000100030373037111001100000077416442629100030383038303830383038
100430372300266254725100010001000398160130183037303724143289510001000100030373037111001100000077416442629100030383038303830383038

Test 2: Latency 1->2

Code:

  sqabs 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)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 cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204300372250612954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
102043003722506129547251010010010000100100005004277160300183003730037282643287451010020010000200100003003730037111020110099100100100001000247101161129633100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100037101161129633100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373008521102011009910010010000100007101161129633100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
10204300372240612954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038

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)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
100243003722500000001242954725100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010000000006403164229629010000103003830038300383003830038
10024300372250000000612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000006402162329629010000103003830038300383003830038
10024300372250000000612954725100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010000000006402164229629010000103003830038300383003830038
10024300372250000000612954725100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038
10024300372250000000612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038
100243003722400000002102954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000010306402163229629010000103003830038300383003830038
10024300372250000000612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000006402163229629010000103003830038300383003830038
10024300372250000900612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000006402163229629010000103003830038300383003830038
100243003722400000001912954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000006402163229629010000103003830038300383003830038
10024300372250000000612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  sqabs v0.8h, v8.8h
  sqabs v1.8h, v8.8h
  sqabs v2.8h, v8.8h
  sqabs v3.8h, v8.8h
  sqabs v4.8h, v8.8h
  sqabs v5.8h, v8.8h
  sqabs v6.8h, v8.8h
  sqabs 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)03l2 tlb miss data (0b)1e3a3f51schedule 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 cache writeback (a8)acc2branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd0d5map dispatch bubble (d6)ddfetch restart (de)dfe0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420039150000526258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000001115124001601320036800001002004020040200402004020040
802042003915000072258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000041115124001600320036800001002004020040200402004020040
802042003915009030258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000001115124001600320036800001002004020040200402004020040
802042003915003341258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000001115124701600320036800001002004020040200402004020040
802042003915000341258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000001115124701600320036800001002004020040200402004020040
802042003915000341258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000001115124701600320036800001002004020040200402004020040
802042003915000341258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000001115124701600320036800001002004020040200402004020040
802042003915000341258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001001601115141701600320075800001002004020040200402004020040
802042003915010341258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000001115124701600320036800001002004020040200402004020040
802042003915009341258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000001115124701600320036800001002004020040200402004020040

1000 unrolls and 10 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)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)l1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)accdcfd5map dispatch bubble (d6)dbddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242003915001242580010108000010800005064000020020200392003999963100198001020800002080000200392003911800211091010800001000000050201164122003680000102004020040200402004020040
80024200391500402580010108000010800005064000020020200392003999963100198001020800002080000200392003911800211091010800001000000050201163112003680000102004020040200402004020040
80024200391503402580010108000010800005064000020020200392003999963100198001020800002080000200392003911800211091010800001000000050201164112003680000102004020040200402004020040
800242003915001352580022108000010800005064000020020200392003999963100198001020800002080000200392003911800211091010800001000000050201164112003680000102004020040200402004020040
80024200391500402580010108000010800005064000020020200392003999963100198001020800002080000200392003911800211091010800001000000050201164212003680000102004020040200402004020040
80024200391500402580010108000010800005064000020020200392003999963100198001020800002080000200392003911800211091010800001000000050201164112003680000102004020040200402004020040
80024200391500402580010108000010800005064000020020200392003999963100198001020800002080000200392003911800211091010800001000000050201164112003680000102004020040200402004020040
80024200391500402580010108000010800005064000020020200392003999963100198001020800002080000200392003911800211091010800001000000050201163122003680000102004020040200402004020040
80024200391500402580010108000010800005064000020020200392003999963100198001020800002080000200392003911800211091010800001000000050201163112003680000102004020040200402004020040
800242003915003592580010108000010800005064000020020200392003999963100198001020800002080000200392003911800211091010800001000000050201164112003680000102004020040200402004020040