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, D)

Test 1: uops

Code:

  sqdmull d0, s0, 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)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 tlb access (a0)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
1004303723061254825100010001000398313130183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
1004303723061254825100010001000398313030183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
10043037231861254825100010001000398313130183037303724153289510001168200030373037111001100000073116112630100030383038303830383038
10043037231861254825100010001000398313030183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
1004303723061254825100010001000398313130183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
10043037221561254825100010001000398313130183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
1004303723061254825100010001000398313130183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
1004303722061254825100010001000398313130183037303724193289510001000200030373037111001100000073116112630100030383038303830383038
10043037222161254825100010001000398313130183037303724153289510001000200030853037111001100000073116112630100030383038303830383038
10043037230103254825100010001000398313130183037303724153289510001000200030373037111001100000073116112630100030383038303830383038

Test 2: Latency 1->2

Code:

  sqdmull d0, s0, 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)0318191e1f3f4e51schedule 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)9fld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)accfd0d5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020430037225000061295482510100100100001001000050042773131230018300373003728265328745101002001000020020000300373003711102011009910010010000100000071021161129634100001003003830038300383003830038
1020430037225000061295482510100100100001001000050042773131230018300373003728265328745101002001000020020000300373003711102011009910010010000100000071021161129634100001003003830038300383003830038
1020430037225000061295482510100100100001001000050042773131230018300373003728265328745101002001000020020000300373003711102011009910010010000100000071021161129634100001003003830038300383003830038
1020430037225000061295482510100100100001001000050042773131230018300373003728265328745101002001000020020000300373003711102011009910010010000100000071021161129634100001003003830038300383003830038
1020430037225000061295482510100100100001001000050042773131230018300373003728265328745101002001000020020000300373003711102011009910010010000100000071021161129634100001003003830038300383003830038
1020430037224000061295482510100100100001001000050042773131230018300373003728265328745101002001000020020000300373003711102011009910010010000100000071021161129634100001003003830038300383003830038
1020430037225000061295482510100100100001001000050042773131230018300373003728265328745101002001000020020000300373003711102011009910010010000100000071021161129634100001003003830038300383003830038
1020430037225000061295482510100100100001001000050042773131230018300373003728265328745101002001000020020000300373003711102011009910010010000100000071021161129634100001003003830038300383003830038
1020430037225000061295482510100100100001001000050042773130230018300373003728265328745101002001000020020000300373003711102011009910010010000100000071021161129634100001003003830038300383003830038
1020430037225000061295482510100100100001001000050042773131230018300373003728268328745101002001000020020000300373003711102011009910010010000100000071021161129634100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03181e3f4e51schedule 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)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
100243003722501261295482510010101000010100005042773133001830037300372828732876710010201000020200003003730037111002110910101000010001006402162229630210000103008630086300383008430038
1002430037226012103295482510010101000010100005042773133001830037300372828732876710010201000020200003003730037111002110910101000010001006402162229630010000103003830038300383003830038
100243003722500103295482510010101000010100005042773133001830037300372828732876710010201000020200003003730037111002110910101000010001006402162229630010000103003830038300383003830038
1002430037225012103295482510010101000010100005042773133001830037300372828732876710312201000020200003003730037111002110910101000010000006402162329630010000103003830038300383003830038
10024300372250061295482510010101000010100005042773133001830037300372828732876710010201000020200003003730037111002110910101000010000006402162229630010000103003830038300383003830038
10024300372250061295482510010101000010100005042773133001830037300372828732876710010201000020200003003730037111002110910101000010000006402162229630010000103003830038300383003830038
10024300372250061295482510010101000010100005042773133001830037300372828732876710010201000020200003003730037111002110910101000010000006402162229630010000103003830038300383003830038
10024300372250061295482510010101000010100005042773133001830037300372828732876710010201000020200003003730037111002110910101000010000006402162229630010000103003830038300383003830038
10024300372250061295482510010101000010100005042773133001830037300372828732876710010201000020200003003730037111002110910101000010200006402162229630010000103003830038300383003830038
10024300372250061295482510010101000010100005042773133001830037300372828732876710010201000020200003003730037111002110910101000010000006402162229630010000103003830038300383003830038

Test 3: Latency 1->3

Code:

  sqdmull d0, s1, 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)03mmu table walk data (08)l2 tlb miss data (0b)1e3f4e51schedule 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)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020430037225000612954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010006607102162229634100001003003830038300383003830038
1020430037225000612954825101251001000010010000500427867003001830037300372826532874510100200100002002000030037300371110201100991001001000010002107102162229634100001003003830038300383003830038
10204300372240006129548251010010010000100100005004277313030018300373003728265328745101002001000020020000300373003711102011009910010010000100012007102162229634100001003003830038300383003830038
10204300372250006129548251010010010000100100005004277313030018300373003728265328745101002001000020020000300373003711102011009910010010000100018907102162229634100001003003830038300383003830038
10204300372250006129548251010010010000100100005004277313030018300373003728265328745101002001000020020000300373003711102011009910010010000100016207102162229634100001003003830038300383003830038
10204300372250006129548251010010010000100100005004277313030018300373003728265328745101002001000020020000300373003711102011009910010010000100017107102162229634100001003003830038300383003830038
10204300372250006129548251010010010000100100005694277313030018300373003728265328745101002001000020020000300373003711102011009910010010000100211707102162229634100001003003830038300383003830038
10204300372250001662954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010009007102162229634100001003003830038300383003830038
10204300372250006129548251010010010000100100005004277313030018300373003728265328745101002001000020020000300373003711102011009910010010000100016207102162229634100001003003830038300383003830038
10204300372250006129548251010010010000100100005004277313030018300373003728265328745101002001000020020000300373003711102011009910010010000100017107102162229634100001003003830038300383003830038

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)1e3f4e51schedule 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)9facbranch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
100243003722510061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000640316222963010000103003830038300383003830038
100243003722500061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000640216222963010000103003830038300383003830038
100243003722500061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000640216222963010000103003830038300383003830038
100243003722500061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000640216222963010000103003830038300383003830038
100243003722500061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000640216222963010000103003830038300383003830038
100243003722500061295482510010101000010100005042773131300183003730037282873287671001020100002020000300373003711100211091010100001000640216222963010000103003830038300383003830038
100243003722500061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000640216222963010000103003830038300383003830038
100243003722500061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000640216222963010000103003830038300383003830038
100243003722500061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000640216222963010000103003830038300383003830038
100243003722500061295482510010101000010100005042773130300183003730037282873287671001020103362020000300373003711100211091010100001000640216222963010000103003830038300383003830038

Test 4: throughput

Count: 8

Code:

  sqdmull d0, s8, v9.s[1]
  sqdmull d1, s8, v9.s[1]
  sqdmull d2, s8, v9.s[1]
  sqdmull d3, s8, v9.s[1]
  sqdmull d4, s8, v9.s[1]
  sqdmull d5, s8, v9.s[1]
  sqdmull d6, s8, v9.s[1]
  sqdmull d7, s8, 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)03mmu table walk data (08)09l2 tlb miss data (0b)18191e1f3f51schedule 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)a9acc2branch 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
80204200591500000000412580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100000020750000511031611200360800001002004020040200402004020040
80204200391500000000412580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100000000210000511011611200360800001002004020040200402004020040
8020420039150000000041258010010080084100800005006400001200202003920039997339997801002008000020016000020039200391180201100991001008000010000000000000511011611200360800001002004020040200402004020040
8020420039150000000041258010010080000100800005006400000200202003920039997339997801002008000020016000020039200391180201100991001008000010000000000000511011611200360800001002004020040200402004020040
8020420039150000000041258010010080000100800005006400000200202003920039997339997801002008000020016000020039200391180201100991001008000010000000000000511011611200360800001002004020040200402004020040
8020420039150000000041258010010080000100800005006400000200202003920039997339997801002008000020016000020039200391180201100991001008000010000002030000511011611200360800001002004020040200402004020040
8020420039150000000041258010010080000100800005006400000200202003920039997339997801002008000020016000020039200391180201100991001008000010000000000000511011611200360800001002004020040200402004020040
802042003915000000004125801001008000010080000500640000020020200392003999733999780100200800002001600002003920039118020110099100100800001000000001590000511011611200360800001002004020040200402004020040
8020420039150000000041258010010080000100800005006400000200202003920039997339997801002008000020016000020039200391180201100991001008000010000000000000511011611200360800001002004020040200402004020040
80204200391500000000412580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100000000120000511011611200360800001002004020040200402004020040

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)l2 tlb miss instruction (0a)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)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)9fld unit uop (a6)l1d cache writeback (a8)accfd0d5map dispatch bubble (d6)d9ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200581500004025800121080000108000050640000102002020039200399996310019800102080000201600002003920039118002110910108000010000502001316014112003680000102004020040200402004020040
80024200391500004025800121080000108000050640000102002020039200399996310019800102080000201600002003920039118002110910108000010000502011316015122003680000102004020040200402004020040
800242003915001082258001010800001080000506400000120020200392003910005310019800102080000201600002003920039118002110910108000010000502011316012132003680000102004020040200402004020040
800242003915000082258001010800001080000506400001120020200392003999963100198001020800002016000020039200391180021109101080000100084502001616013152003680000102004020040200402004020040
800242003915000124025800101080000108000050640000112002020039200399996310019800102080000201600002003920039118002110910108000010223502011216013142003680000102004020040200402004020197
800242003915000124025800101080000108000050640000102002020039200399996310019800102080000201600002003920039118002110910108000010038156502001316012132003680000102004020040200402004020040
8002420039150000402580010108000010800005064000001200202003920039999631001980010208000020160000200392003911800211091010800001003350201816011132003680000102004020040200402004020040
8002420039150100402580012108000010800005064000001200202003920039999631001980010208000020160000200392003911800211091010800001002126502011216011132003680000102004020040200402004020040
8002420039150000402580010108000010800005064000011200202003920039999631001980010208000020160000200392003911800211091010800001000050201121601272003680000102004020040200402004020040
80024200391500004025800101080000108000050640000112002020039200399996310019800102080000201600002003920039118002110910108000010040050201716013122003680000102004020040200402004020040