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

SQRSHL (vector, 8H)

Test 1: uops

Code:

  sqrshl v0.8h, v0.8h, v1.8h
  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)0318191e1f3f4e51schedule 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 access (a0)l1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
1004303723000012625482510001000100039831330183037303724153289510001000200030373037111001100000000073116112630100030383038303830383038
100430372300006125482510001000100039831330183037303724153289510001000200030373037111001100000000073116112630100030383038303830383038
100430372300006125482510001000100039831330183037303724153289510001000200030373037111001100000000073116112630100030383038303830383038
100430372300306125482510001000100039831330183037303724153289510001000200030373037111001100000000073116112630100030383038303830383038
100430372300006125482510001000100039831330183037303724153289510001000200030373037111001100000000073116112630100030383038303830383038
1004303723000012425482510001000100039831330183037303724153289510001000200030373037111001100000000073116112630100030383038303830383038
100430372200006125482510001000100039831330183037303724153289510001000200030373037111001100000000073116112630100030383038303830383038
100430372300006125482510001000100039831330183037303724153289510001000200030373037111001100000000073116112630100030383038303830383038
100430372200006125482510001000100039831330183037303724153289510001000200030373037211001100000000073116112630100030383038303830383038
100430372300008225482510001000100039831330183037303724153289510001000200030373037111001100000000073116112630100030383038303830383038

Test 2: Latency 1->2

Code:

  sqrshl v0.8h, v0.8h, v1.8h
  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)0318191e3f4e51schedule 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 miss (a1)l1d cache writeback (a8)acbranch 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
1020430037225000612954825101001001000010010000500427731303001830037300372827272874010100200100082002001630037300371110201100991001001000010000011171811611296470100001003003830038300383003830038
1020430037225000612954825101001001000010010000500427731303001830037300372827272874010100200100082002001630037300371110201100991001001000010000011171811611296470100001003003830038300383003830038
1020430037225000612954825101001001000010010000500427731303001830037300372827272874110100200100082002001630037300371110201100991001001000010000011171711611296470100001003003830038300383003830038
1020430037225000612954825101001001000010010000500427731303001830037300372827272874110100200100082002001630037300371110201100991001001000010000011171811611296460100001003003830038300383003830038
1020430037225010612954825101001001000010010000500427731303001830037300372827272874010100200100002002000030037300371110201100991001001000010000000071021622296340100001003003830038300383003830038
1020430037225000612954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000000071021622296340100001003003830038300383003830038
1020430037225000612954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000000071021622296340100001003003830038300383003830038
1020430037225000612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000000071021622296340100001003003830038300383003830038
1020430037225000612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030079300371110201100991001001000010000000071021622296340100001003003830038300383003830038
1020430037225000612954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000000071021622296340100001003003830038300383003830038

1000 unrolls and 10 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 cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002430037225315612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010006402162229630010000103003830038300383003830038
100243003722501032954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010006402162229630010000103003830038300383003830038
100243003722539612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010006402162229630010000103003830038300383003830038
100243003722545612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010006402162229630010000103003830038300383003830038
10024300372250612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010006402162229630010000103003830038300383003830038
100243003722527612954825100101010000101000050427731313001830037300372828732876710010201000020200003008430037111002110910101000010006402162229630010000103003830038300383003830038
100243003722530612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010006402162229630010000103003830038300383003830038
10024300372259612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010006402162229630010000103003830038300383003830038
100243003722563612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010006402162229630010000103003830038300383003830038
100243003722502512954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010006402162229630010000103003830038300383003830038

Test 3: Latency 1->3

Code:

  sqrshl v0.8h, v1.8h, 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)03181e3a3f4e51schedule 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020430037225000612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100097101161129634100001003003830038300383003830038
102043003722500061295482510100100100001001000050042773133001830037300372826532874510100200100002002000030037300371110201100991001001000010001807101161129634100001003003830038300383003830038
10204300372250006129548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000847101161129634100001003003830038300383003830038
10204300372250006129548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000787101161129634100001003003830038300383003830038
10204300372250006129548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000547101161129634100001003003830038300383003830038
1020430037224000612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100067101161129634100001003003830038300383003830038
1020430037225000612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100037101161029634100001003003830038300383003830038
102043003722500061295482510100100100001001000050042773133001830037300372826532874510100200100002002000030037300371110201100991001001000010001477101161129634100001003003830038300383003830038
102043003722500061295482510100100100001001000050042773133001830037300372826532874510100200100002002000030037300371110201100991001001000010001897101161129634100001003003830038300383003830038
1020430037225000612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100067101161129634100001003003830038300383003830038

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)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)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024300372250000000612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000006402162229630010000103003830038300383003830038
10024300372250000000612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000006402162229630010000103003830038300383003830038
10024300372240000000612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000006402162229630010000103003830038300383003830038
10024300372250000000612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000006402162229630010000103003830038300383003830038
10024300372250000000612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000006402162229630010000103003830038300383003830038
100243003722500000007262954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000006402162229630010000103003830038300383003830038
100243003722400000001562954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000028406402162229630010000103003830038300383003830038
10024300372250000000612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000006402162229630010000103003830038300383003830038
10024300372250000000612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000006402162229630010000103003830038300383003830038
10024300372250000000612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000006402162229630010000103003830038300383003830038

Test 4: throughput

Count: 8

Code:

  sqrshl v0.8h, v8.8h, v9.8h
  sqrshl v1.8h, v8.8h, v9.8h
  sqrshl v2.8h, v8.8h, v9.8h
  sqrshl v3.8h, v8.8h, v9.8h
  sqrshl v4.8h, v8.8h, v9.8h
  sqrshl v5.8h, v8.8h, v9.8h
  sqrshl v6.8h, v8.8h, v9.8h
  sqrshl v7.8h, v8.8h, v9.8h
  movi v8.16b, 9
  movi v9.16b, 10

(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)031e1f3f51schedule 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)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042005915000412580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100000051102161120036800001002004020040200402004020040
8020420039150002312580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100000051101161120036800001002004020040200402004020040
802042003915000412580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100000051101161120036800001002004020040200402004020040
802042003915018132412580100100800001008000050064245612002020039200399973399978010020080000200160000200392003911802011009910010080000100000051101161120036800001002004020040200402004020040
8020420039150270412580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100000051101161120036800001002004020040200402004020040
8020420039150007062580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100000051101161120036800001002004020040200402004020040
8020420039150004125801001008000010080000500640000120020200392003999733999780100200800002001600002003920039118020110099100100800001000008151101161120036800001002004020040200402004020040
802042003915000412580100100800001008000050064000012002020039200399973399978010020080000200160000200392003911802011009910010080000100000051101161120036800001002004020040200402004020040
802042003915000412580100100800001008000050064000012002020039200399973399978010020080000200160000200392003911802011009910010080000100000051101161120036800001002004020040200402004020040
802042003915000412580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100000051101161120036800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03mmu table walk data (08)181e1f3f5051schedule 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)5f60696d6emap 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 miss (a1)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)ea? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242003915000004020023258001010800001080000506400000020020200392003999960310019800102080000201600002003920039118002110910108000010003502031622200360080000102004020040200402004020040
8002420039150000040200232580010108000010800005064000000200202003920039999603100198001020800002016000020039200391180021109101080000100005020416232003603480000102004020040200402004020040
8002420039150009040025800101080000108000050640000012002020039200399996031001980010208000020160000200392003911800211091010800001000123502021622200360080000102004020040200402004020040
80024200391500000400258001010800001080000506400000120020200392003999960310019800102080000201600002003920039118002110910108000010000502021624200360080000102004020040200402004020040
80024200391500000400258001010800001080000506400000120020200392003999960310019800102080000201600002003920039118002110910108000010000502041622200360080000102004020040200402004020040
80024200391500000400258001010800001080000506400000120020200392003999960310019800102080000201600002003920039118002110910108000010000502021622200360080000102004020040200402004020040
80024200391500000400258001010800001080000506400000120020200392003999967310019800102080000201600002003920039118002110910108000010000502041622200360080000102004020040200402004020040
80024200391500000400258001010800001080000506400000120020200392003999960310019800102080000201600002003920039118002110910108000010003502021622200360080000102004020040200402004020040
80024200391500000400258001010800001080000506400000120020200392003999960310019800102080000201600002003920039118002110910108000010000502021644200360080000102004020040200402004020040
80024200391500000400258001010800001080000506400000120020200392003999960310019800102080000201600002003920039118002110910108000010006502021622200360080000102004020040200402004020040