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, 2D)

Test 1: uops

Code:

  sqabs v0.2d, v0.2d
  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)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
100430372206125472510001000100039816013018303730372414328951000100010003037303711100110000073216112629100030383038303830383038
1004303722126125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303723156125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372206125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372206125472510001000100039816013018303730372414328951000100010003037303711100110000673116112629100030383038303830383038
100430372206125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372336125472510001000100039816013018303730372414328951000100010003037303711100110000373116112629100030383038303830383038
1004303723061254725100010001000398160130183037303724143289510001000100030373037111001100019673116112629100030383038303830383038
1004303722061254725100010001000398160130183037303724143289510001000100030373037111001100029973116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  sqabs v0.2d, v0.2d
  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)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)ld unit uop (a6)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020430037225952212947515510212142100401451120068842879761303063041830466282862728892113442261132322011326304173046361102011009910010010000100630413945071011611296330100001003003830038300383003830038
10204300372240612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000000071011611296330100001003003830038300383003830038
102043003722506129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000000710116112963324100001003003830038300383003830038
10204300372250612954743101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000000071011611296330100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000106271011611296330100001003003830038300383003830038
10204300372250612953825101001251000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000000071013311296330100001003003830038300863008630085
10204300372250612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000000071011611296330100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000000071011611296330100001003003830038300383003830038
102043003722507262954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000000071011611296330100001003003830038300383003830038
1020430037225121242954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010000000071011611296330100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03l1i tlb fill (04)mmu table walk data (08)09l2 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)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
1002430037224000000002133129547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000000644101651029629010000103003830038300383003830038
1002430037225000000002106029547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000000644101610529629010000103003830038300383003830038
100243003722400000000291229547251001010100001210300504277160130018300373013328286328767100102010000201000030037300371110021109101010000100000000644101651029629010000103003830038300383003830038
100243003722500000000264529547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000000644816101029629010000103003830038300383003830038
10024300372250000000021051295472510010101000010100005042771601300183003730037282863287671001020100002010000300373022711100211091010100001000000006441116101029629010000103003830038300383003830038
1002430037225000000002746295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000000006441016101029629010000103003830038300383003830226
100243003722500000000283929547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000000644101610529629010000103003830038302273003830038
1002430037225000000002761295474410010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000000006441016101029629010000103003830038300383003830038
100243003722400000000285729547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000000644101610529629010000103003830038300383003830038
1002430037225000000002853295472510010101000010100005042771601300183003730037282953287671001020100002010000300373003711100211091010100001000000006441116101029629010000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  sqabs v0.2d, v8.2d
  sqabs v1.2d, v8.2d
  sqabs v2.2d, v8.2d
  sqabs v3.2d, v8.2d
  sqabs v4.2d, v8.2d
  sqabs v5.2d, v8.2d
  sqabs v6.2d, v8.2d
  sqabs v7.2d, v8.2d
  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 instruction (07)l2 tlb miss instruction (0a)l2 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)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)acc2branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420039150110000011625801081008000810080020500640132120020200392003999776999080120200800322008003220039200391180201100991001008000010000011151183161120036800001002004020040200402004020040
802042003915011000009325801081008000810080020500640132120020200392003999776999080120200800322008003220039200391180201100991001008000010000011151181161220036800001002004020040200402004020040
802042003915011000007425801081008000810080020500640132120020200392003999776999080120200800322008003220039200391180201100991001008000010000011151181161120036800001002004020040200402004020040
802042003915011000005325801081008000810080020500640132120020200392003999776999080120200800322008003220039200391180201100991001008000010000011151181161220036800001002004020040200402004020040
8020420090150110001803025801081008000810080020500640132120020200392003999776999080120200800322008003220039200391180201100991001008000010000011151181161220036800001002004020040200402004020040
802042003915011000005125801081008000810080020500640132120020200392003999876999080120200800322008003220039200391180201100991001008000010000011151181161120036800001002004020040200402004020040
802042003915011000003025801081008000810080020500640132120020200392003999776999080120200800322008003220039200391180201100991001008000010000011151181161120036800001002004020040200402004020040
8020420039150110000030258010810080008100800205006401321200202003920039997769990801202008003220080032200392003911802011009910010080000100039011151181161120036800001002004020040200402004020040
802042003915011000003025801081008000810080020500640132020020200392003999776999080120200800322008003220039200391180201100991001008000010000011151181161120036800001002004020040200402004020040
802042003915011000009725801081008000810080020500640132120020200392003999776999080120200800322008003220039200391180201100991001008000010000011151181161220036800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03091e3f51schedule 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)9fst unit uop (a7)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420051150204202580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100005020116132003680000102004020040200402004020040
800242003915000402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100005020116142003680000102004020040200402004020040
800242003915000402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100005020116122003680000102004020040200402004020040
800242003915000612580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100005020116112003680000102004020040200402019620040
800242003915006612580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100005020116142003680000102004020040200402004020040
800242003915000402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100005020116122003680000102004020040200402004020040
800252003915000402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100005020116142003680000102004020040200402004020040
800242003915000402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100005020116122003680000102004020040200402004020040
800242003915000402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100005020116152003680000102004020040200402004020040
800242003915000402580010128000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100005020116132003680000102004020040200402004020040