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

SQDMULL (by element, 2D)

Test 1: uops

Code:

  sqdmull v0.2d, v0.2s, v1.s[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)033f4e51schedule 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 tlb access (a0)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100430372261254825100010001000398313130183037303724153289510001000200030373037111001100000073316222630100030383038303830383038
100430372361254825100010001000398313030183037303724153289510001000200030373037111001100001073416222630100030383038303830383038
100430372382254825100010001000398313030183037303724153289510001000200030373037111001100000073416222630100030383038303830383038
100430372361254825100010001000398313030183037303724153289510001000200030373037111001100000073316222630100030383038303830383038
100430372361254825100010001000398313030183037303724153289510001000200030373037111001100000073316222630100030383038303830383038
100430372361254825100010001000398313030183037303724153289510001000200030373037111001100000073316222630100030383038303830383038
100430372361254825100010001000398313030183037303724153289510001000200030373037111001100000073316222630100030383038303830383038
100430372361254825100010001000398313030183037303724153289510001000200030373037111001100000073316222630100030383038303830383038
100430372361254825100010001000398313030183037303724153289510001000200030373037111001100000073316222630100030383038303830383038
1004303723170254825100010001000398313130183037303724153289510001000200030373037111001100000073316222630100030383038303830383038

Test 2: Latency 1->2

Code:

  sqdmull v0.2d, v0.2s, v1.s[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)3f4e51schedule 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)ld unit uop (a6)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204300372250612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000007101161129634100001003003830038300383003830038
10204300372250612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000007101161129634100001003003830038300383003830038
10204300372240612954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000007331161129634100001003003830038300383003830038
10204300372250612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000007101161129634100001003003830038300383003830038
102043003722509432954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000007101161129634100001003003830038300383003830038
10204300372250892954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000007101161129634100001003003830038300383003830038
10204300372250612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000007101161129634100001003003830038300383003830038
10204300372250612954825101001001000010010000500427731313001830037300372826532874510100200100002142000030037300371110201100991001001000010000007101161129634100001003003830038300383003830038
10204300372250612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000007101161129634100001003003830038300383003830038
10204300372250612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000007101161129634100001003003830038300383003830038

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
1002430037225000000612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000000006404162229630010000103003830038300383003830038
10024300372240000002512954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000000006402162229668010000103003830038300383003830038
10024300372250000002512954825100101010000101000050427731303001830037300372828732876710010201000020200003003730037111002110910101000010000000006402162229630010000103003830038300383003830038
1002430037225000000612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000000006402162229630010000103003830038300383003830038
1002430037225000000612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000000006403162229630010000103003830038300383003830038
1002430037225000000612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000000016403162229630010000103003830038300383003830038
10024300372250000005992954825100101010000101000050427731303001830037300372828732876710010201000020200003003730037111002110910101000010000000006403162229630010000103003830038300383003830038
10024300372250000004412954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000000006403162229630010000103003830038300383003830038
1002430037224000000612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000000006402162229630010000103003830038300383003830038
10024300372250000006129548251001010100001010000504277313130018300373003728287328767100102010000202000030037300371110021109101010000100000015006404162229630010000103003830038300383003830038

Test 3: Latency 1->3

Code:

  sqdmull v0.2d, v1.2s, v0.s[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)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)6061696d6emap 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)acc2branch mispred nonspec (cb)cfd0d5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102043003722518612954825101001001000010010000500427731300300183003730037282653287451010020010000200200003003730037111020110099100100100001000000071051161129634100001003003830038300383003830038
10204300372250612954825101001001000010010000500427731300300183003730037282653287451010020010000200200003003730037111020110099100100100001000000071051161129634100001003003830038300383003830038
10204300372250612954825101001001000010010000500427731300300183003730037282733287451010020210000200200003003730037111020110099100100100001000000071051161129634100001003003830038300383003830038
10204300372250612954825101001001000010010000500427731300300183003730037282653287451010020010000200200003003730037111020110099100100100001000000071051161129634100001003003830038300383003830038
102043003722401562954825101001001000010010000500427731300300183003730037282653287451010020010000200213043003730037111020110099100100100001000100071051161129634100001003003830038300383003830038
10204300372250612954825101001001000010010000500427731300300183003730037282653287451010020010000200200003003730037111020110099100100100001000000071051161129634100001003003830038300383003830038
102043003722507262954825101001001000010010000500427731300300183003730037282653287451010020010000200200003003730037111020110099100100100001000000071051161129634100001003003830038300383003830038
102043003722507262954825101001001000010010000500427731300300183003730037282653287451010020010000200200003003730037111020110099100100100001000000071051161129634100001003003830038300383003830038
10204300372250612954825101001001000010010000500427731300300183003730037282653287451010020010000200200003003730037111020110099100100100001000000071051161129634100001003003830038300383003830038
10204300372250612954825101001001000010010000500427731300300183008530037282653287451010020410000200200003003730089411020110099100100100001000200071051161129634100001003003830038300383003830038

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)accdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024300372250612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000640416432963010000103003830038300383003830038
10025300372250612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037211002110910101000010001640416442963010000103003830038300383003830038
10024300372250612954825100101010000101000050427731303001830037300372828732876710010201000020200003003730037111002110910101000010000640216442963010000103003830038300383003830038
10024300372250612954825100101010000101000050427731303001830037300372828732876710010201000020209843003730037111002110910101000010000640316442963010000103003830038300383003830038
10024300372250612954825100101010000101000050427731303001830037300372828732876710010201000020200003003730037111002110910101000010000640416442963010000103003830038300383003830038
10024300372250612954825100101010000101000050427731303001830037300372828732876710010201000020200003003730037111002110910101000010000640416442963010000103003830038300383003830038
10024300372240612954825100101010000101000050427731303001830037300372828732876710010201000020200003003730037111002110910101000010090640216342963010000103003830038300383003830038
10024300372250612954825100101010000101000050427731303001830037300372828732876710010201000020200003003730037111002110910101000010000640416442963010000103003830038300383003830038
10024300372250612954825100101010000101000050427731303001830037300372828732876710010201000020200003008530037111002110910101000010000640316442966410000103003830038300383003830038
10024300372250612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000640216342963010000103003830038300383003830038

Test 4: throughput

Count: 8

Code:

  sqdmull v0.2d, v8.2s, v9.s[1]
  sqdmull v1.2d, v8.2s, v9.s[1]
  sqdmull v2.2d, v8.2s, v9.s[1]
  sqdmull v3.2d, v8.2s, v9.s[1]
  sqdmull v4.2d, v8.2s, v9.s[1]
  sqdmull v5.2d, v8.2s, v9.s[1]
  sqdmull v6.2d, v8.2s, v9.s[1]
  sqdmull v7.2d, v8.2s, v9.s[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)03l1i tlb fill (04)1e3f51schedule 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0ea? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042004915000412580100100800001008000050064000002002020039200399973039997801002008000020016000020039200391180201100991001008000010000511041623200360800001002004020040200402004020040
802042003915000412580100100800001008000050064000002002020039200399973039997801002008000020016000020039200391180201100991001008000010000511021623200360800001002004020040200402004020040
8020420039150012412580100100800001008000050064000002002020039200399973039997801002008000020016000020039200391180202100991001008000010000511021623200361800001002004020040200402004020040
802042003915000412580100100800001008000050064000002002020039200399973039997801002008000020016000020039200391180201100991001008000010000511031632200360800001002004020040200402004020040
802042003915000412580100100800001008000050064000002002020039200399973039997801002008000020016000020039200391180201100991001008000010000511031632200360800001002004020040200402004020040
802042003915000412580100100800001008000050064000002002020039200399973039997801002008000020016000020039200391180201100991001008000010000511031623200360800001002004020040200402004020040
802042003915000412580100100800001008000050064000002002020039200399973039997801002008000020016000020039200391180201100991001008000010000511031632200360800001002004020040200402004020040
802042003915000412580100100800001008000050064000002002020039200399973039997801002008000020016000020039200391180201100991001008000010000511031615200360800001002004020040200402004020040
802042003915000412580100100800001008000050064000002002020039200399973039997801002008000020016000020039200391180201100991001008000010000511031633200360800001002004020040200402004020040
802042003915000412580100100800001008000050064000002002020039200399973039997801002008000020016000020039200391180201100991001008000010000511031623200360800001002004020040200402004020040

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)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80025200481500402580010108000010800005064000002002020039200399996310019800102080000201600002003920190118002110910108000010005020316112003680000102004020040200402004020040
80024200391500402580010108000010800005064000012002020039200899996310019800102080000201600002003920039118002110910108000010005020116112003680000102004020040200402004020040
800242003915051402580010108000010800005064000002002020039200399996310019800102080000201600002003920039118002110910108000010005020116112003680000102004020040200402004020040
80024200391500402580010108000010800005064000002002020039200399996310019800102080000201600002003920039118002110910108000010005020116112003680000102004020040200402004020040
80024200391500402880010108000010800005064000002002020039200399996310019800102080000201600002003920039118002110910108000010005020116112003680000102004020040200402004020040
80024200391500402580010108000010800005064000002002020039200399996310019800102080000201600002003920039118002110910108000010005020116112003680000102004020040200402004020040
80024200391500402580010108000010800005064000002002020039200399996310019800102080000201600002003920039118002110910108000010005020116112003680000102004020040200402004020040
8002420039150183402580010108000010800005064000002002020039200399996310019800102080000201600002003920039118002110910108000010005020116112003680000102004020040200402004020040
80024200391500402580010108000010800005064000002002020039200399996310019800102080000201600002003920039118002110910108000010005020116112003680000102004020040200402004020040
80024200391500402580010108000010800005064000002002020039200399996310019800102080000201600002003920039118002110910108000010005020116112003680000102004020040200402004020040