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

UADDLV (vector, 4H)

Test 1: uops

Code:

  uaddlv s0, v0.4h
  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
100430372306125472510001000100039816013018303730372414328951000100020003037303711100110000073316112629100030383038303830383038
100430372306125472510001000100039816013018303730372414328951000100020003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816013018303730372414328951000100020003037303711100110000073116112629100030383038303830383038
1004303723061254725100010001000398160130183037303724143289510001000200030373037111001100002173116112629100030383038303830383038
1004303722061254725100010001000398160130183037303724143289510001000200030373037111001100001573116112629100030383038303830383038
100430372206125472510001000100039816013018303730372414328951000100020003037303711100110000073116112629100030383038303830383038
1004303723061254725100010001000398160130183037303724143289510001000200030373037111001100003373116112629100030383038303830383038
100430372206125472510001000100039816013018303730372414328951000100020003037303711100110000073116112629100030383038303830383038
100430372206125472510001000100039816013018303730372414328951000100020003037303711100110002973116112629100030383038303830383038
100430372306125472510001000100039816013018303730372414328951000100020003037303711100110000073116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  uaddlv s0, v0.4h
  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)9fld unit uop (a6)l1d cache writeback (a8)a9acbranch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020430037225061295472510100100100001001000050042771600300183003730037282643287451010020610168200200003003730037111020110099100100100001002420071021622296330100001003003830038300383003830038
1020430037225061295472510100100100001001000050042771600300183003730037282643287451010020010000200200003003730037111020110099100100100001000000071021622296330100001003003830038300383003830038
1020430037225061295472510100100100001001000050042771601300183003730037282643287451010020010000200200003003730037111020110099100100100001000100071021622296330100001003003830038300383003830038
102043003722545853295474310100100100001001000055142771601300183003730037282643287451025820210000200200003008430085111020110099100100100001000003071021622296330100001003003830038300383003830038
1020430037225061295472510100100100001001000050042771601300183003730037282643287451010020010000200200003003730037111020110099100100100001000000071021622296330100001003003830038300383003830038
1020430037224061295472510100100100001001000050042771600300183003730037282643287451010020010000200200003003730037111020110099100100100001000000071021622296330100001003003830038300383003830038
10204300372250126295472510100100100001001000050042771600300183003730037282643287451010020010000200200003003730037111020110099100100100001000103071021622296330100001003003830038300383003830038
1020430037225061295472510100100100001001000050042771601300183003730037282643287451010020010000200200003003730037111020110099100100100001000000071021622296330100001003003830038300383003830038
1020430037225061295472510100100100001001000050042771601300183003730037282643287451010020010000200200003003730037111020110099100100100001000000071021622296330100001003003830038300383003830038
1020430037225061295472510100100100001001000050042771601300183003730037282643287451010020010000200200003003730037111020110099100100100001000000071021622296330100001003003830038300383003830038

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)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)l1d cache writeback (a8)a9acc2branch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002430037225000000024429547251001010100001110000504277160300183003730037282863287671001020100002020000300373003711100211091010100001000000006402162229629010000103003830038300383003830086
10024300372250000038106129547251001010100001010000504277160300183003730037282863287671001020100002020000300373003711100211091010100001000000006402162229701010000103003830038300383003830038
1002430037224000003906129547251001010100001010000504277160300183003730037283013287671001020100002020000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
1002430037225000001506129547251001010100001010000504277160300183003730037282863287671001020100002020000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
10024300372250000046506129547251001010100001010000504277160300183003730037282863287671001020100002020000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
1002430037225000001806129547251001010100001010000504277160300183003730037282863287671001020100002020000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
1002430037225000002706129547251001010100001010000504277160300183003730037282863287671001020100002020000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
100243003722500000180612954725100101010000101000050427716030018300373003728286328767100102010000202000030037300371110021109101010000100000144006402162229629010000103003830038300383003830038
10024300372250000030606129547251001010100001010000504277160300183003730037282863287671001020100002020000300373003711100211091010100001000100006402162229629010000103003830038300383003830038
1002430037225000004506129547251001010100001010000504277160300183003730037282863287671001020100002020000300373003711100211091010100001000000006402162229629010000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  uaddlv s0, v8.4h
  uaddlv s1, v8.4h
  uaddlv s2, v8.4h
  uaddlv s3, v8.4h
  uaddlv s4, v8.4h
  uaddlv s5, v8.4h
  uaddlv s6, v8.4h
  uaddlv s7, v8.4h
  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)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)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)9facbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042005815005052580108100800081008002050064013220020020039200399977699908012020080032200160064200392003911802011009910010080000100011151181160020036800001002004020040200402004020040
80204200391500302580108100800081008002050064013220020020039200399977699908012020080032200160064200392003911802011009910010080000100011151180160020036800001002004020040200402004020040
80204200391500302580108100800081008002050064013220020020039200399977699908012020080032200160064200392003911802011009910010080000100011151180160020036800001002004020040200402004020040
8020420039150243302580108100800081008002050064013220020020039200399977699908012020080032200160064200392003911802011009910010080000100011151180160020036800001002004020040200402004020040
80204200391500302580108100800081008002050064013220020020039200399977699908012020080032200160064200392003911802011009910010080000100011151180160020036800001002004020040200402004020040
802042003915018302580108100800081008002050064013220020020039200399977699908012020080032200160064200392003911802011009910010080000100011151180160020036800001002004020040200402004020040
802042003915005052580108100800081008002050064013220020020039200399977699908012020080032200160064200392003911802011009910010080000100011151180160020036800001002004020040200402004020040
802042003915002222580108100800081008002050064013220020020039200399977699908012020080032200160064200392003911802011009910010080000100011151180160020036800001002004020040200402004020040
802042003915042302580108100800081008002050064013220020020039200399977699908012020080032200160064200392003911802011009910010080000100011151180160020036800001002004020040200402004020040
80204200391500302580108100800081008002050064013220020020039200399977699908012020080032200160064200392003911802011009910010080000100011151180160020036800001002004020040200402004020040

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)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
80024200511500040258001010800001080000506400002002020039200399996310019800102080000201600002003920039118002110910108000010005020616742003680000102004020040200402004020040
80024200391500040258001010800001080000506400002002020039200399996310019800102080000201600002003920039118002110910108000010005020316552003680000102004020040200402004020040
8002420039150004025800101080000108000050640000200202003920039999631001980010208000020160000200392003911800211091010800001001235020616352003680000102004020040200402004020040
800242003915002140258010910800001080000506400002002020039200399996310019800102080000201600002003920039118002110910108000010005020316352003680000102004020040200402004020040
80024200391500040258001010800001080000506400002002020039200399996310019800102080000201600002003920039118002110910108000010005020616652003680000102004020040200402004020040
80024200391500040258001010800001080000506400002002020039200399996310019800102080000201600002003920039118002110910108000010005020516532003680000102004020040200402004020040
80024200391500040258001010800001080000506400002002020039200399996310019800102080000201600002003920039118002110910108000010005020516352003680000102004020040200402004020040
8002420039150007052580010108000010800005064000020020200392003910012310019800102080000201600002003920039118002110910108000010005020616352003680000102004020040200402004020040
800242003915011240258001010800001080000506400002002020039200399996310019800102080000201600002003920039118002110910108000010005020316532003680000102004020040200402004020040
80024200391500040258001010800001080000506400002002020039200399996310019800102080000201600002003920039118002110910108000010005020516462003680000102004020040200402004020040