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

MUL (vector, 2S)

Test 1: uops

Code:

  mul v0.2s, v0.2s, v1.2s
  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)0309l2 tlb miss data (0b)191e1f3a3f4e51schedule 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 miss (a1)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100430372300000061254825100010001000398313030183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
100430372300000061254825100010001000398313030183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
1004303722000000156254825100010001000398313130183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
100430372200000061254825100010001000398313030183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
100430372200000084254825100010001000398313030183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
100430372300000061254825100010001000398313030183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
100430372300000061254825100010001000398313030183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
100430372300000061254825100010001000398313030183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
100430372300000061254825100010001000398313030183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
100430372300000061254825100010001000398313030183037303724153289510001000200030373037111001100000073116112630100030383038303830383038

Test 2: Latency 1->2

Code:

  mul v0.2s, v0.2s, v1.2s
  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)0318191e3a3f4e51schedule 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)acc2branch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204300372250000612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100000071011611296340100001003003830038300383003830038
1020430037225000061295482510100100100001001000050042773133001830037300372826532874510100200100002002000030037300371110201100991001001000010017000710116112963425100001003003830038300383003830038
10205300372250000612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100000071011611296340100001003003830038300383003830038
102043003722400270612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100000071011611296340100001003003830038300383003830038
10204300372250000612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100000071011655296340100001003003830038300383003830038
10204300372250000612954825101001001000710010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100000071011611296340100001003003830038300383003830038
10204300372250000612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100000071011611296340100001003003830038300383003830038
10204300372240000612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100000071011611296340100001003003830038300383003830038
10204300372250000612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100000071011611296340100001003003830038300383003830038
10204300372250000612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100000071011611296340100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03mmu table walk instruction (07)mmu table walk data (08)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)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 access (a0)l1d tlb miss (a1)ld unit uop (a6)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
100243003722500000006129548251001010100001010000504277313030018300373003728287032876710010201000020200003003730037111002110910101000010000000006402162229630010000103003830038300383003830038
100243003722500000006129548251001010100001010000504277313030018300373003728287032876710010201000020200003003730037111002110910101000010000000006402162229630010000103003830038300383003830038
100243003722500000006129548251001010100001010000504277313030018300373003728287032876710010201000020200003003730037111002110910101000010000009006402162229630010000103003830038300383003830038
100243003722500000006129548251001010100001010000504277313030018300373003728287032876710010201000020200003003730037111002110910101000010000000006402162229630010000103003830038300383003830038
1002430037224000033006129548251001010100001010000504277313030018300373003728287032876710010201000020200003003730037111002110910101000010000000006402162229630010000103003830038300383003830038
100243003722500000006129548251001010100001010000504277313030018300373003728287032876710010201000020200003003730037111002110910101000010000000006402162229630010000103003830038300383003830038
100243003722500000006129548251001010100001010000504277313030018300373003728287032876710010201000020200003003730037111002110910101000010000000006402162229630010000103003830038300383003830038
100243003722500000006129548251001010100001010000504277313030018300373003728287032876710010201000020200003003730037111002110910101000010000000006402162229630010000103003830038300383003830038
100243003722500000008229548251001010100001010000504277313030018300373003728287032876710010201000020200003003730037111002110910101000010000000006402162229630010000103003830038300383008530038
100243003722500000006129548251001010100001010000504277313030018300373003728287032876710010201000020200003003730037111002110910101000010000000006402162229630010000103003830038300383003830038

Test 3: Latency 1->3

Code:

  mul v0.2s, v1.2s, v0.2s
  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)181e3f4e51schedule 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)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020430037225000612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010001007101161129634100001003003830038300383003830038
102043003722500121032954825101001001000010010000500427731313001830037300372826532874510100200100002042000030037300851110201100991001001000010020282007101161129667100001003003830038300383003830038
1020430037225011711032954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000307101161129634100001003003830038300383003830038
1020430037225000612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000007101161129634100001003003830038300383003830038
102043003722500121032954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000047101161129634100001003003830038300853003830038
1020430037225000612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000007101161129634100001003003830038300383003830038
1020430037225010612953925101001001000010010000500427731313001830084300372826532874510100200100002002000030037300371110201100991001001000010000007101161129634100001003003830038300383003830038
1020430037225000612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000007101161129634100001003003830038300383003830038
1020430037224000612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000007101161129634100001003003830038300383003830038
1020430037225000612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000007101161129634100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03mmu table walk instruction (07)mmu table walk data (08)l2 tlb miss data (0b)18191e3f4e51schedule 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)ld unit uop (a6)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
100243003722500000061295482510010101000010100005042773131300180300373003728287328767100102010000202000030037300371110021109101010000100000640416442963010000103003830038300383003830038
100243003722500000061295482510010101000010100005042773131300180300373003728287328767100102010000202000030037300371110021109101010000100000640416432963010000103003830038300383003830038
100243003722500000061295482510010101000010100005042773131300180300373003728287328767100102010000202000030037300371110021109101010000100000640416432963010000103003830038300383003830038
100243003722500000061295482510010101000010100005042773131300180300373003728287328767100102010000202000030037300371110021109101010000100000640416432963010000103003830038300383003830038
100243003722500000061295482510010101000010100005042773131300180300373003728287328767100102010000202000030037300371110021109101010000100000640416442963010000103003830038300383003830038
100243003722500000061295482510010101000010100005042773131300180300373003728287328767100102010000202000030037300371110021109101010000100000640216342963010000103003830038300383003830038
1002430037225000000612954825100101010000101000050427731313001803003730037282873287671001020100002020000300373003711100211091010100001000130640416432963010000103003830038300383003830038
100243003722500000061295482510010101000010100005042773131300180300373003728287328767100102010000202000030037300371110021109101010000100000640416432963010000103003830038300383003830038
100243003722500000061295482510010101000010100005042773131300180300373003728287328767100102010000202000030037300371110021109101010000100000640416362963010000103003830038300383003830038
100243003722500000061295482510010101000010100005042773131300180300373003728287328767100102010000202000030037300371110021109101010000100000640416442963010000103003830038300383003830038

Test 4: throughput

Count: 8

Code:

  mul v0.2s, v8.2s, v9.2s
  mul v1.2s, v8.2s, v9.2s
  mul v2.2s, v8.2s, v9.2s
  mul v3.2s, v8.2s, v9.2s
  mul v4.2s, v8.2s, v9.2s
  mul v5.2s, v8.2s, v9.2s
  mul v6.2s, v8.2s, v9.2s
  mul v7.2s, v8.2s, v9.2s
  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)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)9fld unit uop (a6)l1d cache writeback (a8)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042005915030041258010010080000100800005006400001200202003920039997303999780100200800002001600002003920039118020110099100100800001000051102161120036800001002004020040200402004020040
80204200391500041258010010080000100800005006400001200202003920039997373999780100200800002001600002003920039118020110099100100800001000051101161120036800001002004020040200402004020040
80204200391500041258010010080000100800005006400001200202003920039997303999780100200800002001600002003920039118020110099100100800001000051101161120036800001002004020040200402004020040
80204200391500041258010010080000100800005006400001200202003920039997303999780100200800002001600002003920039118020110099100100800001000051101161120036800001002004020040200402004020040
802042003915033041258010010080000100800005006400001200202003920039997303999780100200800002001600002003920039118020110099100100800001000051101161120036800001002004020040200402004020040
80204200391500041258010010080000100800005006400001200202003920039997303999780100200800002001600002003920039118020110099100100800001000051101161120036800001002004020040200402004020040
80204200391500041258010010080000100800005006400001200202003920039997303999780100200800002001600002003920039118020110099100100800001000051101161120036800001002004020040200402004020040
80204200391500041258010010080000100800005006400000200202003920039997303999780100200800002001600002003920039118020110099100100800001000051101161120036800001002004020040200402004020040
802042003915015041258010010080000100800005006400001200202003920039997303999780100200800002001600002003920039118020110099100100800001000151101161120036800001002004020040200402004020040
80204200391500041258010010080000100800005006400000200202003920039997303999780100200800002001600002003920039118020110099100100800001000051101161120036800001002004020040200402004020040

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
80024200481500402580010108000010800005064000012002020039200399996310019800102080000201600002003920039118002110910108000010005020616562003680000102004020040200402004020040
80024200391500402580010108000010800005064000002002020039200399996310019800102080000201600002003920039118002110910108000010005020816772003680000102004020040200402004020040
80024200391500402580010108000010800005064000002002020039200399996310019800102080000201600002003920039118002110910108000010005020516872003680000102004020040200402004020040
80024200391500402580010108000010800005064000002002020039200399996310019800102080000201600002003920039118002110910108000010005020516642003680000102004020040200402004020040
80024200391500402580010108000010800005064000002002020039200399996310019800102080000201600002003920039118002110910108000010205020616682003680000102004020040200402004020040
80024200391500402580010108000010800005064000002002020039200399996310019800102080000201600002003920039118002110910108000010005020516652003680000102004020040200402004020040
80024200391500402580010108000010800005064000002002020039200399996310019800102080000201600002003920039118002110910108000010005020516562003680000102004020040200402004020040
80024200391500402580010108000010800005064000002002020039200399996310019800102080000201600002003920039118002110910108000010105020516652003680000102004020040200402004020040
80024200391500402580010108000010800005064000002002020039200399996310019800102080000201600002003920039118002110910108000010005020716872003680000102004020040200402024820040
80024200391500402580010108000010800005064000002002020039200399996310019800102080000201600002003920100118002110910108000010005020616552003680000102004020040200402004020040