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, S)

Test 1: uops

Code:

  sqabs s0, s0
  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)031e1f3f4e51schedule 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 cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
1004303723006125472510001000100039816013018303730372414328951000100010003037303711100110000073216222629100030383038303830383038
1004303722006125472510001000100039816013018303730372414328951000100010003037303711100110000073216222629100030383038303830383038
1004303723006125472510001000100039816013018303730372414328951000100010003037303711100110000073216222629100030383038303830383038
1004303723006125472510001000100039816003018303730372414328951000100010003037303711100110000073216222629100030383038303830383038
10043037220010325472510001000100039816013018303730372414328951000100010003037303711100110000073216222629100030383038303830383038
1004303722006125472510001000100039816003018303730372414328951000100010003037303711100110000073216222629100030383038303830383038
10043037220010525472510001000100039816003018303730372414328951000100010003037303711100110000073216222629100030383038303830383038
10043037230014725472510001000100039816003018303730372414328951000100010003037303711100110000073216222629100030383038303830383038
10043037230010325472510001000100039816003018303730372414328951000100010003037303711100110000073216222629100030383038303830383038
10043037230010325472510001000100039816003018303730372414328951000100010003037303711100110000073216222629100030383038303830383038

Test 2: Latency 1->2

Code:

  sqabs s0, s0
  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)183f4e51schedule 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020430037225006129547251010010010000100100005004277160300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
1020430037224006129547251010010010000100100005004277160300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
1020430037225006129547251010010010000100100005004277160300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
1020430037225006129547251010010010000100100005004277160300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
1020430037225006129547251010010010000100100005004277160300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
1020430037225006129547251010010010000100100005004277160300183003730037282643287451010020010000216100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
1020430037225006129547251010010010000100100005004277160300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
10204300372250053629547251010010010000100100005004277160300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
10204300372250037029547251010010010000100100005004277160300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
1020430037225006129547251010010010000100100005004277160300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03mmu table walk data (08)09l2 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)6061696b6d6emap 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)a9acc2cfd0d5map dispatch bubble (d6)daddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024300852251000015061295472510010101000010100005042771600030018030037300372828632876710010201000020100003003730037111002110910101000010000000640031602229629010000103003830038300383003830038
1002430037224000000061295472510010101000010100005042771600030018030037300372828632876710010201000020100003003730037111002110910101000010000000640021602229629010000103003830038300383003830038
1002430037225000000061295472510010101000010100005042771600030018030037300372828632876710010201000020100003003730037111002110910101000010000000640021602229629010000103003830038300383003830038
1002430037225000000061295472510010101000010100005042771600030018030037300372828632876710010201000020100003003730037111002110910101000010000000640021602229629010000103003830038300383003830038
1002430037225000000061295472510010101000010100005042771600030018030037300372828632876710010201000020100003003730037511002110910101000010000000640021602229629010000103003830038300383003830038
1002430037225000000061295472510010101000010100005042771600030018030037300372828632876710010201000020100003003730037111002110910101000010000000640021602229629010000103003830038300383003830038
1002430037225000000061295472510010101000010100005042771600030018030037300372828632876710010201000020100003003730037111002110910101000010000000640021602229629010000103003830038300383003830038
1002430037225000000082295472510010101000010100005042771600030018030037300372828632876710010201000020100003003730037111002110910101000010000000640021602229629010000103003830038300383003830038
1002430037225000000061295472510010101000010100005042771600030018030037300372828632876710010201000020100003003730037111002110910101000010000000640021602229629010000103003830038300383003830038
1002430037225000000061295472510010101000010100005042771600030018030037300372828632876710010201000020101083003730037111002110910101000010000000640021602229629010000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  sqabs s0, s8
  sqabs s1, s8
  sqabs s2, s8
  sqabs s3, s8
  sqabs s4, s8
  sqabs s5, s8
  sqabs s6, s8
  sqabs s7, s8
  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)09l2 tlb miss data (0b)18191e1f3f51schedule 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)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
802042006115000000003025801081008000810080020500640132200202003920039997769990801202008003220080032200392003911802011009910010080000100000000111511801600200360800001002004020040200402004020040
802042003915000000003025801081008000810080020500640132200202003920039997769990801202008003220080032200392003911802011009910010080000100000000111511801600200360800001002004020040200402004020040
8020420039150000002403025801081008000810080020500640132200202003920039997769990801202008003220080032200392003911802011009910010080000100000000111511801600200360800001002004020040200402004020040
80204200391500000027303025801081008000810080020500640132200202003920039997769990801202008003220080032200392003911802011009910010080000100000000111511804100200360800001002004020040200402004020040
802042003915000000003025801081008000810080020511644970200202003920039997769990801202008003220080032200392003911802011009910010080000100000200111511801600200360800001002004020040200402004020040
802042003915000000603025801081008000810080020500640132200202003920039997769990801202008003220080032200392003911802011009910010080000100000000111511801600200360800001002004020040200402004020040
802042003915000000003025801081008000810080020500640132200202003920039997769990801202008003220080032200392003911802011009910010080000100000000111511801600200360800001002004020040200402004020040
802042003915000000003025801081008000810080020500640132200202003920039997769990801202008003220080032200392003911802011009910010080000100000000111511801600200360800001002004020040200402004020040
802042003915000000003025801081008000810080020500640132200202003920039997769990801202008003220080032200392003911802011009910010080000100000000111511801600200360800001002004020040200402004020040
802042003915000000003025801081008000810080020500640132200202003920039997769990801202008003220080032200392003911802011009910010080000100000000111511801600200360800001002004020040200402004020040

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)60696d6emap stall dispatch (70)simd prf full (72)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)e0eb? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200401500402580010108000010800005064000002002020039200399996031001980010208000020800002003920039118002110910108000010005020516151520036080000102004020040200402004020040
8002420039150040258001010800001080000506400000200202003920039999603100198001020800002080000200392003911800211091010800001000502031651520036080000102004020040200402004020040
800242003915006142580010108000010800005064000002002020039200399996031001980010208000020800002003920039118002110910108000010005020131615620036080000102004020040200402004020040
8002420039150061258001010800001080000506400000200202003920039999603100198001020800002080000200392003911800211091010800001000502031661620036080000102004020040200402004020040
8002420039150040258001010800001080000506400000200202003920039999603100198001020800002080000200392003911800211091010800001000502051661620036080000102004020040200402004020040
8002420039150040258001010800001080000506400000200202003920039999603100198001020800002080000200392003911800211091010800001000502051616620036080000102004020040200402004020040
8002420039150040258001010800001080000506400000200202003920039999603100198001020800002080000200392003911800211091010800001000502071661620036080000102009120040200402004020040
800242003918607282580010108000010800005064000002002020039200399996031001980010208000020800002003920039118002110910108000010005020141615520036080000102004020040200402004020040
80024200391500402580010108000010800005064000002002020039200399996031001980010208000020800002003920039118002110910108000010047650201516161620036080000102004020040200402004020040
800242003915004025800101080000108000050640000020020200392003999960310019800102080000208000020039200391180021109101080000100050201516151520036080000102004020040200402004020040