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 (by element, 2S)

Test 1: uops

Code:

  mul v0.2s, 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)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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100430372206125482510001000100039831313018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372306125482510001000100039831313018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372306125482510001000100039831313018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
1004303723012825482510001000100039831313018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372306125482510001000100039831313018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372308425482510001000100039831313018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372306125482510001000100039831313018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372209525482510001000100039831313018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
1004303723012725482510001000100039831313018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372306125482510001000100039831313018303730372415328951000100020003037303711100110000073116112630100030383038303830383038

Test 2: Latency 1->2

Code:

  mul v0.2s, 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 instruction (07)l2 tlb miss instruction (0a)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)696d6emap 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)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102043003722500053629548251010010010000100100005004277313300183003730037282650328745101002001000020020000300373003711102011009910010010000100207102162229634100001003003830038300383003830038
1020430037224000156295482510100100100001001000050042773133001830037300372826503287451010020010000200200003003730037111020110099100100100001004007412162229634100001003003830038300383003830038
10204300372250006129548251010010010000100100005004277313300183003730037282650328745101002001000020020000300373003711102011009910010010000100107102162229634100001003003830038300383003830038
10204300372250006129548251010010010000100100005004277313300183003730037282650328745101002001000020020000300373003711102011009910010010000100007102162229634100001003003830038300383008530038
1020430037225000287429548251010010010000100100005004277313300183003730037282650328745101002001000020020000300373003711102011009910010010000100007102162229634100001003003830038300383003830038
10204300372250006129548251010010010000100100005004277313300183003730037282650328745101002001000020020000300373003711102011009910010010000100007102162229634100001003003830038300383003830038
1020430037225004056129548251010010010000100100005004277313300183003730037282650328745101002001000020020000300373003711102011009910010010000100107102162229634100001003003830038300383003830038
10204300372250008229548251010010010000100100005004277313300183003730037282650328745101002001000020020000300373003711102011009910010010000100007102162229634100001003003830038300383003830038
10204300372250006129548251010010010000100100005004277313300183003730037282650328745101002001000020020000300373003711102011009910010010000100007102162229634100001003003830038300383003830038
10204300372250006129548251010010010000100100005004277313300183003730037282650328745101002001000020020000300373003711102011009910010010000100007102162229634100001003003830038300383003830038

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? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002430037225061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001010640216222963010000103003830038300383003830038
1002430037225061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000640216222963010000103003830038300383003830038
1002430037225061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000640216222963010000103003830038300383003830038
1002430037225061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001020640216222988010000103003830038300383003830079
1002430037225061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000640216222963010000103003830038300383003830038
1002430037225061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000640216222963010000103003830038300383003830038
10024300372259612954825100101010000101000050427731303001830037300372828732876710010201000020200003003730037111002110910101000010283640216222963010000103003830038300383003830038
1002430037225061295483910010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000640216222963010000103003830038300383022730038
1002430037225061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000640216222963010000103003830038300383003830038
10024300372250103295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000640216222963010000103003830038300383003830038

Test 3: Latency 1->3

Code:

  mul v0.2s, 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)0318191e1f3a3f4e51schedule 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)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
102043003722500000612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100420121648000710432122988631100001003037130374304063036130321
1020430037227773014600295481031018713710024100107457274286774302703036930037282852828873111912221099422422304303703037091102011009910010010000100020101915000710116112963433100001003003830038300383003830038
10204300372240015006129548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000003000071011611296340100001003003830038300383003830038
10204300372250000014529548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000000000071011611296340100001003003830085301803003830038
10204300372250000016829548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000000000071011611296340100001003003830038300383003830038
1020430037225000006129548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000000000071011611296340100001003003830038300383003830038
10204300372250000014529548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000000000071011611296340100001003003830038300383003830038
1020430037225000006129548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000000000071011611296340100001003003830038300383003830038
10204300372250000016629548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000000000071011611296340100001003008530038300383003830038
1020430037225000008229548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000000000071011611296340100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03l2 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 cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
100243003722500000021029548251001010100001010000504277313130018300373003728287328767100102010000202000030037300371110021109101010000100000640216322963010000103003830038300383003830038
1002430037225000390018729548251001010100001010000504277313130018300373003728287328767100102010000202000030037300371110021109101010000100000640216222963010000103003830038300383003830038
1002430037225000390023129548251001010100001010000504277313030018300373003728287328767100102010000202000030037300371110021109101010000100000640216222963010000103003830038300383003830038
100243003722400000025429548251001010100001010000504277313030018300373003728287328767100102010000202000030037300371110021109101010000100000640216322963010000103003830038300383003830038
10024300372250000006129548251001010100001010000504277313130018300373003728287328767100102010000202000030037300371110021109101010000100000640216322963010000103003830038300383003830086
100243003722500000012429548251001010100001010000504277313130018300373003728287328767100102010000202000030037300371110021109101010000100000640216232963010000103003830038300383003830038
100243003722400000014529548251001010100001010000504277313130018300373003728287328767100102010000202000030037300371110021109101010000100003640216322963010000103003830038300383003830038
100243003722500000033729548251001010100001010000504277313130018300373003728287328767100102210000202000030037300371110021109101010000100000640242232963010000103003830038300383003830038
100243003722401000016829548251001013100001010000504277313130018300373003728287328767100102010000202000030037300371110021109101010000100000640216322963010000103003830038300383003830038
100243003722500000033529548251001010100001010000504277313130018300373003728287328844100102010000202000030037300371110021109101010000100000640216222963010000103003830038300863003830038

Test 4: throughput

Count: 8

Code:

  mul v0.2s, v8.2s, v9.s[1]
  mul v1.2s, v8.2s, v9.s[1]
  mul v2.2s, v8.2s, v9.s[1]
  mul v3.2s, v8.2s, v9.s[1]
  mul v4.2s, v8.2s, v9.s[1]
  mul v5.2s, v8.2s, v9.s[1]
  mul v6.2s, v8.2s, v9.s[1]
  mul v7.2s, 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)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)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 cache writeback (a8)acbranch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042005915001042580100100800001008000050064000020020020039200399973399978010020080000200160000200392003911802011009910010080000100000511021611200360800001002004020040200402004020040
80204200391500412580100100800001008000050064000020020020039200399973399978010020080000200160000200392003911802011009910010080000100000511021611200360800001002004020040200402004020040
80204200391500412580100100800841008000050064000020020020039200399973399978010020080000200160000200392003911802011009910010080000100000511011611200360800001002004020040200402004020040
80204200391500412580100100800001008000050064000020020020039200399973399978010020080000200160000200392003911802011009910010080000100000511011611200360800001002004020040200402004020040
80204200391500412580100100800001008000050064000020020020039200399973399978010020080000200160000200392003911802011009910010080000100000511011611200360800001002004020040200402004020040
802042003915001502580100100800001008000050064000020020020039200399973399978010020080000200160000200392003911802011009910010080000100000511011611200360800001002004020040200402004020040
802042003915005162580100100800001008000050064000020020020090200399973399978010020080000200160000200392003911802011009910010080000100000511011611200360800001002004020040200402004020040
802042003915001262580100100800001008000050064000020020020039200399973399978010020080000200160000200392003911802011009910010080000100000511011611200360800001002004020040200402004020040
80204200391500412580100100800001008000050064000020020020039200399973399978010020080000200160000200392003911802011009910010080000100000511011611200360800001002004020040200402004020040
802042003915001232580100100800001008000050064000020020020039200399973399978010020080000200160000200392003911802011009910010080000100000511011611200360800001002004020040200402004020040

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)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 cache writeback (a8)branch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242004815004025800101080000108000050640000120020020039200399996310019800102080000201600002003920039118002110910108000010005020171611132003680000102004020040200402004020040
8002420039150218225800101080000108000050640000020020020039200399996310019800102080000201600002003920039118002110910108000010005020131612132003680000102004020040200402004020040
800242003915008225800101080000108000050640000020020020039200399996310019800102080000201600002003920039118002110910108000010005020111613122003680000102004020040200402004020040
800242003915006125800101080000108000050640000120020020039200399996310019800102080000201600002003920039118002110910108000010015020121613132003680000102004020040200402004020040
800242003915004025800101080000108000050640000020020020039200399996310019800102080000201600002003920039118002110910108000010005020131612122003680000102004020040200402004020040
800242003915004025800101080000108000050640000020020020039200399996310019800102080000201600002003920039118002110910108000010005020111611122003680000102004020040200402004020040
800242003915004025800101080000108000050640000020020020039200399996310019800102080000201600002003920039118002110910108000010005020121613132003680000102004020040200402004020040
800242003915004025800101080000108000050640000120020020039200399996310019800102080000201600002003920039118002110910108000010005020131610132003680000102004020040200402004020040
800242003915004025800101080000108011250640000120020020039200399996310019800102080000201600002003920039118002110910108000010005020111611122003680000102004020040200402004020040
800242003915004025800101080000108000050640000020020020039200399996310019800102080000201600002003920039118002110910108000010005020141613132003680000102004020040200402004020040