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, 8B)

Test 1: uops

Code:

  sqabs v0.8b, v0.8b
  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)696d6emap 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)ld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
10043037230612547251000100010003981603018303730372414328951000100010003037303711100110000000073116112629100030383038303830383038
10043037230612547251000100010003981603018303730372414328951000100010003037303711100110000001073116112629100030383038303830383038
10043037220612547251000100010003981603018303730372414328951000100010003037303711100110000000073116112629100030383038303830383038
10043037230612547251000100010003981603018303730372414328951000100010003037303711100110000000073116112629100030383038303830383038
10043037230612547251000100010003981603018303730372414328951000100010003037303711100110000000073116112629100030383038303830383038
10043037220612547251000100010003981603018303730372414328951000100010003037303711100110000000073116112629100030383038303830383038
10043037230612547251000100010003981603018303730372414328951000100010003037303711100110000000373116112629100030383038303830383038
10043037220612547251000100010003981603018303730372414328951000100010003037303711100110000000073116112629100030383038303830383038
10043037230612547251000100010003981603018303730372414328951000100010003037303711100110000002073116112629100030383038303830383038
10043037240612547251000100010003981603018303730372414328951000100010003037303711100110000000073116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  sqabs v0.8b, v0.8b
  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)1e3f4e51schedule 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)60696b6d6emap 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? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
102043003722500822954725101001001000010010000500427716003001803003730037282643287451010020010000200100003003730037111020110099100100100001000071011611296330100001003003830038300383003830038
102043003722500612954725101001001000010010000500427716003001803003730037282643287451010020010000200100003003730037111020110099100100100001000071011611296330100001003003830038300383003830038
102043003722500612954725101001001000010010000500427716003001803003730037282643287451010020010000200100003003730037111020110099100100100001000073221611296330100001003003830038300383003830038
102043003722500612954725101001001000010010000500427716003001803003730037282643287451010020010000200100003003730037111020110099100100100001000071011611296330100001003003830086300383003830038
102043003722503612954725101001001000010010000500427716003001803003730037282643287451010020010000200106663003730037111020110099100100100001000071011611296330100001003003830038300383003830038
1020430037225106129511175102021481007215010900731428932803001803003730037282643287451010020010000200101643003730037211020110099100100100001000071011611296330100001003003830038300383003830038
102043003722500612954725101001001000010010000500427716013001803003730037282643287451010020010000200100003003730037111020110099100100100001000071011611296330100001003003830038300383003830038
102043003722500612954725101001001000010010000500427716003001803003730037282643287451010020010000200100003003730037111020110099100100100001000071011611296330100001003003830038300383003830083
10204300372250216129547251010010010000100100005004277160030018030037300372826432874510100200100002001000030037300371110201100991001001000010058071011611296330100001003003830038300383003830038
102043003722500612954725101001001000010010000500427716003001803003730037282643287451010020010000200100003003730037111020110099100100100001000071011611296330100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03mmu table walk instruction (07)mmu 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)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 tlb access (a0)l1d tlb miss (a1)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
100243003722500000000612954725100101010000101000050427716003001830037300372828603287671001020100002010000300373003711100211091010100001000000006403163329629010000103003830038300383003830038
100243003722500000000612954725100101010000101015050427716003001830037300372828603287671001020100002010000300373003711100211091010100001000000006403173329629010000103003830038300383003830038
100243003722500000000612954725100101010000101000050427716003001830037300372828603287671001020100002010000300373003721100211091010100001000000006403163329629010000103003830038300383003830038
100243003722500000000612954725100101010000101000050427716003001830037300372828603287671001020100002210000300373003711100211091010100001000002006403163329629210000103003830038300383003830084
100243003723300000000612954725100101010000101000050427716003001830037300372828603287671001020100002010000300373003711100211091010100001000000006403163329629010000103003830038300383003830038
100243003722500000000612954725100101010000101000050427716003001830037300372828603287671001020100002010000300373003711100211091010100001000000006403163329629010000103003830038300383003830038
100243003722400000000612954725100101010000101000050427716003001830037300372828603287671001020100002010000300373003711100211091010100001000200006403163329629010000103003830038300383003830038
100243003722500000000612954725100101010000101000050427716003001830037300372828603287671001020100002010000300373003711100211091010100001000000006403163329629010000103003830038300383003830038
100243003722500000000612954725100101010000101000050427716003001830037300372828603287671001020100002010000300373017911100211091010100001000000006403163329629010000103003830038300383003830038
100243003722500000000612954725100101110008121015050427716003001830037300372828603287671001020100002010000300373003711100211091010100001000000006403163329629010000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  sqabs v0.8b, v8.8b
  sqabs v1.8b, v8.8b
  sqabs v2.8b, v8.8b
  sqabs v3.8b, v8.8b
  sqabs v4.8b, v8.8b
  sqabs v5.8b, v8.8b
  sqabs v6.8b, v8.8b
  sqabs v7.8b, v8.8b
  movi v8.16b, 9

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.2506

retire uop (01)cycle (02)0309181e1f3f51schedule 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)e0ec? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042006815000003025801081008000810080020500640132020020200392003999776999080120200800322008003220039200391180201100991001008000010000111511801600200360800001002004020040200402004020040
802042003915000003025801081008000810080020500640132020020200392003999776999080120200800322008003220039200391180201100991001008000010000111511801600200360800001002004020040200402004020093
802042003915001003025801081008000810080020500640940020020200392003999776999080120200800322008003220039200391180201100991001008000010000111511801600200360800001002004020040200402004020040
802042003915000003025801081008000810080020500640132020020200392003999776999080120200800322008003220039200391180201100991001008000010000111511801600200360800001002004020040200402004020088
80204200391500000302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001002135111511801600200360800001002004020040200402004020040
802042003915000003025801081008000810080020500640132020020200392003999776999080120200800322008003220039200391180201100991001008000010000111511801600200360800001002004020040200402004020040
802042003915000003025801081008000810080020500640132020020200392003999776999080120200800322008003220039200391180201100991001008000010000111511801600200360800001002004020040200402004020040
8020420039150000069525801081008000810080020500640132020020200392003999776999080120200800322008003220039200391180201100991001008000010000111511801600200360800001002004020040200402004020040
802042003915000003025801081008000810080020500640132020020200392003999776999080120200800322008003220039200391180201100991001008000010000111511801600200360800001002004020040200402004020040
802042003915000005125801081008000810080020500640132020020200392003999776999080120200800322008003220039200391180201100991001008000010000111511801600200360800001002004020040200402004020040

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)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)e0ea? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200391500402580010108000010800005064000012002020039200399996310019800102080106208000020039200391180021109101080000100050201216101420098080000102004020040200402004020040
80024200391500822580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100050201416141420036080000102004020040200402004020040
8002420039150040258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010005020916131020036080000102004020040200402004020040
80024200391500402580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100050201516121520036080000102004020040200402004020040
800242003915001032580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100050201216141420036080000102004020040200402004020040
800242003915001032580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100050201516121620036080000102004020040200402004020040
80024200391500402580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100050201716141420036080000102004020040200402004020040
800242003915001052580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100050201316161520036080000102004020040200402004020040
80024200391500402580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100050201316141120036080000102004020040200402004020040
80024200391500402580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100050201116151220036080000102004020040200402004020040