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

SQDMULL2 (by element, 4S)

Test 1: uops

Code:

  sqdmull2 v0.4s, v0.8h, v1.h[1]
  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)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
1004303723661254825100010001000398313030183037303724153289510001000200030373037111001100010073116112630100030383038303830383038
1004303723061254825100010001000398313130183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
1004308422361254825100010001000398313030183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
1004303723061254825100010001000398313030183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
1004303723061254825100010001000398313030183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
1004303722361254825100010001000398313130183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
1004303722061254825100010001000398313130183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
1004303722061254825100010001000398313130183037303724193289510001000200030373037111001100000073116112630100030383038303830383038
1004303722082254825100010001000398313130183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
1004303723061254825100010001000398313030183037303724153289510001000200030373037111001100000073116112630100030383038303830383038

Test 2: Latency 1->2

Code:

  sqdmull2 v0.4s, v0.8h, v1.h[1]
  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)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)l1d cache writeback (a8)a9acc2branch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
102043003722500000006129548251010010010000100100005004277313130018300373003728265328745101002001000020020000300373003711102011009910010010000100000000071011611296340100001003003830038300383008530038
1020430037225000000020842954825101001001000010010149527427867013001830134300852826532874510100200103282022000030037300371110201100991001001000010024042226540805281122994434100001003018030465304643037430417
10204304182280098120070405419294762051021914310032144111927474288169130306304183041728289392889511339228114962272233430324304059110201100991001001000010000002245500893289422985031100001003042430419304683045330472
10204304172281149105679235227294761811020915610064154111927274289225030342300373003728265328745101002001000020020000300373003711102011009910010010000100000000071011611296340100001003003830038300383003830038
102043003722400000006129548251010010010000100100005004277313030018300373003728265328745101002001000020020000300373003711102011009910010010000100000000071011611296340100001003003830038300383003830038
102043003722500000006129548251010010010000100100005004277313130018300373003728265328745101002001000020020000300373003711102011009910010010000100000000071011611296340100001003003830038300383003830038
102043003722500000006129548251010010010000100100005004277313030018300373003728265328745101002001000020020000300373003711102011009910010010000100000000071011611296340100001003003830038300383003830038
102043003722500000006129548251010010010000100100005004277313030018300373003728265328745101002001000020020000300373003711102011009910010010000100000000071011611296340100001003003830038300383003830038
102043003722500000006129548251010010010000100100005004277313030018300373003728265328745101002001000020020000300373003711102011009910010010000100000000071011611296340100001003003830038300383003830038
102043003722500000006129548251010010010000100100005004277313030018300373003728265328745101002001000020020000300373003711102011009910010010000100000000071011611296340100001003003830038300383003830038

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)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)a9acc2cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002430037225000000612954825100101010000101000050427731303001830037300372828732876710010201000020200003003730037111002110910101000010000000006403163329630010000103003830038300383003830038
1002430037225000000612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000000006403163329630010000103003830038300383003830038
1002430037225000000662954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000100006403163329630010000103003830038300383003830038
1002430037225000000612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000000006403163329630010000103003830038300383003830038
1002430037225000000612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000000006403163329630010000103003830038300383003830038
1002430037225000000612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000000006403163329630010000103003830038300383003830038
1002430037225000000612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000000006403163329630010000103003830038300383003830038
1002430037225000000612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000000006403163329630010000103003830038300383003830038
1002430037225000000612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000000006403163329630010000103003830038300383003830038
1002430037225000000612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000000006403163329630010000103003830038300383003830038

Test 3: Latency 1->3

Code:

  sqdmull2 v0.4s, v1.8h, v0.h[1]
  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)03l2 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)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 miss (a1)l1d cache writeback (a8)a9acc2cfd0d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020430037241000122121345295396510142122100161191029862842796041300900301313013328272132876310253204101672042066030037300371110201100991001001000010000253600755023211297045100001003013330085301343003830038
10204300372251110076829548251010010010000100100005004277313130018030037300372826532874510100200100002002000030037300371110201100991001001000010000000710011611296340100001003003830038300383003830038
1020430037225000006129548251010010010000100100005004277313130018030037300372826532874510100200100002002000030037300371110201100991001001000010000000710011611296340100001003003830085300383003830038
10204300372250000031229548251010010010000100101485004277313130018030037300372826532874510100200100002002000030037300371110201100991001001000010000000710011611296340100001003003830038300383003830038
1020430037225000006129548251010010010000100100005004277313130018030037300372826532874510100200100002002000030037300371110201100991001001000010000000710011611296340100001003003830038300383003830038
1020430037225000006129548251010010010000100100005004277313130018030037300372826532874510100200100002002000030037300371110201100991001001000010000000710011611296340100001003003830038300383003830038
1020430037225000006129548251010010010000100100005004277313130018030037300372826532874510100200100002002000030037300371110201100991001001000010000000710011611296340100001003003830038300383003830038
1020430037225000006129548251010010010008100100005004277313130018030037300372826532874510100200100002002000030037300371110201100991001001000010000000710011611296340100001003003830038300383003830038
1020430037225000006129548251010010010000100100005004277313130018030037300372826532874510100200100002002000030037300371110201100991001001000010000000710011611296340100001003003830038300383003830038
1020430037228000306129548251010010010000100100005004277313130018030037300372826532874510100200100002002000030037300371110201100991001001000010000000710011611296340100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03mmu table walk instruction (07)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)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)9fl1d tlb access (a0)l1d cache writeback (a8)a9acbranch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024300372250000061295482510010101000010100005042773133001803003730037282873287671001020100002020000300373003711100211091010100001000000640416652963010000103003830038300383003830038
10024300372250000061295482510010101000010100005042773133001803003730037282873287671001020100002020000300373003711100211091010100001000001640516552963010000103003830038300383003830038
10024300372240000061295482510010101000010100005042773133001803003730131282873287671001020100002020000300373003711100211091010100001002000682616652963010000103003830038300383013230038
100243003722600000103295482510010101000010100005042773133001803003730131282873287671016120103242020000301313003711100211091010100001000000640516562963010000103003830038300383003830038
10024300372250000061295482510010101000010100005042773133001803003730037282873287671001020100002020000300373003711100211091010100001000000640516662963010000103003830038300383003830038
10024300372250000061295482510010101000010100005042773133001803003730037282873287671001020100002020000300373003711100211091010100001000000640616652963010000103003830038300383003830038
10024300372250000061295482510010101000010100005042773133001803003730037282873287671001020100002020000300373003711100211091010100001000000640516562963010000103003830038300383003830038
10024300372250000061295484410010101000010100005042773133001803003730037282873287671001020100002020000300373003711100211091010100001000000640616562963010000103003830038300383003830038
10024300372250000061295482510010101000010100005042773133001803003730037282873287671001020100002020000300373003711100211091010100001000000640516552963010000103003830038300383003830038
10024300372250000061295482510010101000010100005042773133001803003730037282873287671001020100002020000300373003711100211091010100001000000640616662963010000103003830038300383003830038

Test 4: throughput

Count: 8

Code:

  sqdmull2 v0.4s, v8.8h, v9.h[1]
  sqdmull2 v1.4s, v8.8h, v9.h[1]
  sqdmull2 v2.4s, v8.8h, v9.h[1]
  sqdmull2 v3.4s, v8.8h, v9.h[1]
  sqdmull2 v4.4s, v8.8h, v9.h[1]
  sqdmull2 v5.4s, v8.8h, v9.h[1]
  sqdmull2 v6.4s, v8.8h, v9.h[1]
  sqdmull2 v7.4s, v8.8h, v9.h[1]
  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)03mmu table walk data (08)l2 tlb miss data (0b)18191e1f3a3f51schedule 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)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
802042005815000000004125801001008000010080000500640000120020200392003999733999780100200800002001600002003920039118020110099100100800001000002000511021611200360800001002004020040200402004020040
802042003915000000004125801001008000010080000500640000120020200392003999733999780100200800002001600002003920039118020110099100100800001000001000511011611200360800001002004020040200402004020040
802042003915000000004125801001008000010080000500640000120020200392003999733999780100200800002001600002003920039118020110099100100800001000001000511011611200360800001002004020040200402004020040
8020420039150000000041258010010080000100800005006400000200202003920039997339997801002008000020016000020039200391180201100991001008000010000039000511011611200360800001002004020040200402004020040
802042003915000000004125801001008000010080000500640000120020200392003999733999780100200800002001600002003920039118020110099100100800001000000000511011611200360800001002004020040200402004020040
802042003915000000004125801001008000010080000500640000120020200392003999733999780100200800002001600002003920039118020110099100100800001000000000511011611200360800001002004020040200402004020040
802042003915000000004125801001008000010080000500640000120020200392003999733999780100200800002001600002003920039118020110099100100800001000002000511011611200360800001002004020040200402004020040
802042003915000000004125801001008000010080000500640000120020200392003999733999780231200800002001600002003920039118020110099100100800001000000000511011611200360800001002004020040200402004020040
802042003915000000004125801001008000010080000500641632120020200392003999733999780100200800002001600002003920039118020110099100100800001000000034511011611200360800001002004020040200402004020040
802042003915000000004125801001008000010080000500640000020020200392003999733999780100200800002001600002003920039118020110099100100800001000000000511011611200360800001002004020040200402004020040

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)9fld unit uop (a6)l1d cache writeback (a8)accdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420048150040258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000005020616652003680000102004020040200402004020040
8002420039150040258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000005020516852003680000102004020040200402004020040
8002420039150045258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000005020516572003680000102004020115200402011320040
8002420039150040258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000005020516682003680000102004020040200402004020040
8002420039150040258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000005020816762003680000102004020040200402004020040
8002420039150040258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000005020516852003680000102004020040200402004020040
8002420039150040258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001001015020916562003680000102004020040200402004020040
8002420039150040258001010800001080000506416641200202003920039999631001980010208000020160000200392003911800211091010800001000305020716872003680000102004020040200402004020040
80024200391501840258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001001305020716652003680000102004020040200402004020040
8002420039150040258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000005020716562003680000102004020040200402004020040