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, 8H)

Test 1: uops

Code:

  uaddlv s0, 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)1e3f4e51schedule 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
1004303723006125472510001000100039816003018303730372414328951000100020003037303711100110000073116112629100030383038303830383038
10043037230010125472510001000100039816003018303730372414328951000100020003037303711100110000073116222629100030383038303830383038
1004303723006125472510001000100039816013018303730372413328951000100020003037303711100110000073116222629100030383038303830383038
1004303723008225472510001000100039816003018303730372414328951000100020003037303711100110002073116112629100030383038303830383038
10043037230246125472510001000100039816003018303730372414328951000100020003037303711100110006073116112629100030383038303830383038
1004303722006125472510001000100039816003018303730372414328951000100020003037303711100110002073116112629100030383038303830383038
1004303723006125472510001000100039816013018303730372414328951000100020003037303711100110000073116112629100030383038303830383038
1004303723006125472510001000100039816013018303730372414328951000100020003037303711100110000073116112629100030383038303830383038
1004303723006125472510001000100039816013018303730372414328951000100020003037303711100110000073116112629100030383038303830383038
1004303722006125472510001000100039816003018303730372414328951000100020003037303711100110006073116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  uaddlv s0, 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)03mmu table walk data (08)191e3f4e51schedule 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 tlb access (a0)l1d tlb miss (a1)l1d cache writeback (a8)a9acbranch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0ea? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204300372250027661295472510100100100001001000050042771601300180300373003728264328745101002001000020020000300373003711102011009910010010000100000000071011611296330100001003003830038300383003830038
102043003722500061295472510100100100001001000050042771601300180300373003728264328745101002001000020020000300373003711102011009910010010000100000000071011611296331100001003003830038300383003830038
1020430037225001861295472510100100100001001000050042771601300180300373003728264328745101002001000020020000300373003711102011009910010010000100000000071011611296330100001003003830038300383003830038
102043003722500180256295472510100100100001001000050042771601300180300373003728264328745101002001000020020000300373003711102011009910010010000100000000071011611296330100001003003830038300383003830038
1020430037225001561295472510100100100001001000050042798641300180300373003728264328745101002001000020020000300373003721102011009910010010000100420729100071011611296330100001003008530133300383003830038
1020430037224000441295472510100100100001001000050042785121300180300373003728264328745101002041000020020000300373003711102011009910010010000100000040700071011611296330100001003003830038300383003830038
10204300372250027124295472510100100100001001000050042771601300180300373003728264328745104172001000020020000300373003711102011009910010010000100000000071011611296330100001003003830038300383003830038
1020430037225001861295472510100100100001041000050042771601300180300373003728264328745101002001000020020000300373003711102011009910010010000100000000071011611296330100001003003830038300383003830038
1020430037224002161295472510100100100001001000050042771601300180300373003728264328745101002001000020020000300373003711102011009910010010000100000000071011611296330100001003003830038300383003830038
10204300372250027661295472510100100100001001000050042771601300180300373003728264328745101002001000020020000300373003711102011009910010010000100000000071011611296330100001003003830038300383003830038

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)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024300372250000000612954725100101010000101000050427716003001830037300372828632876710010201000020200003003730037111002110910101000010000009906404163329629010000103003830038300383003830038
10024300372250100000612954725100101010000101000050427716013001830037300372828632876710010201000020200003003730037111002110910101000010000007506403163329629010000103003830038300383003830038
1002430037225000000082295472510010101000010100005042771600300183003730037282863287671001020100002020000300373003711100211091010100001000000306403163329629010000103003830038300383003830038
1002430037225000000061295472510010101000010100005042771600300183003730037282863287671001020100002020000300373003711100211091010100001000000006403163329629010000103003830038300383003830038
10024300372240000000612954725100101010000101000050427716013001830037300372828632876710010201000020200003003730037111002110910101000010000012106403163329629010000103003830038300383003830038
1002430037225001100061295472510010101000010100005042771600300183003730037282863287671001020100002020000300373003711100211091010100001000000306403163329629010000103003830038300383003830038
1002430037224000000061295472510010101000010100005042771600300183003730037282863287671001020100002020000300373003711100211091010100001002000306403163329629010000103003830038300383003830038
1002430037225000000061295472510010101000010100005042771601300183003730037282863287671001020100002020000300373003711100211091010100001000000306403163329629010000103003830038300383003830038
1002430037225000000061295472510010101000010100005042771600300183003730037282863287671001020100002020000300373003711100211091010100001000000606403163329629010000103003830038300383003830038
1002430037224000000061295472510010101000010100005042771600300183003730037282863287671001020100002020000300373003711100211091010100001000000306403163329629010000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  uaddlv s0, v8.8h
  uaddlv s1, v8.8h
  uaddlv s2, v8.8h
  uaddlv s3, v8.8h
  uaddlv s4, v8.8h
  uaddlv s5, v8.8h
  uaddlv s6, v8.8h
  uaddlv s7, 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)03mmu table walk instruction (07)l2 tlb miss instruction (0a)181e1f3f51schedule 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)acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200591501100030258010810080008100800205006401322002020039200399977699908012020080032200160064200392003911802011009910010080000100016511151181161120036800001002004020040200402004020040
8020420039150110120132302580108100800081008002050064013220020200392003999776999080120200800322001600642003920039118020110099100100800001000311151181161120036800001002004020040200402004020040
802042003915011000302580108100800081008002050064013220020200392003999776999080120200800322001600642003920039118020110099100100800001000011151181161120036800001002004020040200402004020040
802042003915011000302580108100800081008002050064013220020200392003999776999080120200800322001600642003920039118020110099100100800001000011151181161120036800001002004020040200402004020040
802042003915011000302580108100800081008002050064013220020200392003999776999080120200800322001600642003920039118020110099100100800001000611151181161120036800001002004020040200402004020040
8020420039150110003025801081008000810080020500640132200202003920039997769990801202008003220016006420039200391180201100991001008000010001511151181161120036800001002004020040200402004020040
802042003915011000302580108100800081008002050064013220020200392003999776999080120200800322001600642003920039118020110099100100800001000011151181161120036800001002004020040200402004020040
8020420039150110003025801081008000810080020500640132200202003920039997769990801202008003220016006420039200391180201100991001008000010001211151181161120036800001002004020040200402004020040
802042003915011000302580108100800081008002050064013220020200392003999776999080120200800322001600642003920039118020110099100100800001000011151181161120036800001002004020040200402004020040
802042003915011000302580108100800081008002050064013220020200392003999776999080120200800322001600642003920039118020110099100100800001000311151181161120036800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)031e3a3f51schedule 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)acbranch mispred nonspec (cb)cfd0d5map dispatch bubble (d6)ddfetch restart (de)dfe0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200391510146258001010800001080000506400001200202003920039999603100198001020800002016000020039200391180021109101080000102305022614162622003680000102004020040200402004020040
8002420039150014625800101080000108000050640000020020200392003999960310019800102080000201600002003920039118002110910108000010090502266162622003680000102004020040200402004020040
8002420039150014625800101080000108000050640000020020200392003999960310019800102080000201600002003920039118002110910108000010000502262162222003680000102004020040200402004020040
80024200391500046258001010800001080000506400001200202003920039999603100198001020800002016000020039200391180021109101080000100120502202166222003680000102004020040200402004020040
80024200391500146258001010800001080000506400001200202003920039999603100198001020800002016000020039200391180021109101080000100150502266162222003680000102004020040200402004020040
8002420039150014625800101080000108000050640000020020200392003999960310019800102080000201600002003920039118002110910108000010090502262162222003680000102004020040200402004020040
8002420039150014625800101080000108000050640000020020200392003999960310019800102080000201600002003920039118002110910108000010000502266162222003680000102004020040200402004020040
8002420039150014025800101080000108000050640000020020200392003999960310019800102080000201600002003920039118002110910108000010000502262162222003680000102004020040200402004020040
8002420039150014625800101080000108000050640000020020200392003999960310019800102080000201600002003920039118002110910108000010000502266166222003680000102004020040200402004020040
8002420039150014625800101080000108000050640000120020200392003999960310019800102080000201600002003920039118002110910108000010000502262166222003680000102004020040200402004020040