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

UMULL (by element, 2D)

Test 1: uops

Code:

  umull 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)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
100430372308225482510001000100039831313018303730372415328951000100020003037303711100110000373116112630100030383038303830383038
100430372306125482510001000100039831313018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372206125482510001000100039831303018303730372415328951000100020003037303711100110000073116112630100030853085303830383038
100430372306125482510001000100039831303018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372206125482510001000100039831303018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372206125482510001000100039831303018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372306125482510001000100039831303018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372306125482510001000100039831303018303730372415328951000100020003037303711100110000373116112630100030383038303830383038
100430372306125482510001000100039831303018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372206125482510001000100039831303018303730372415328951000100020003037303711100110001073116112630100030383038303830383038

Test 2: Latency 1->2

Code:

  umull 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)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)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)9fld unit uop (a6)l1d cache writeback (a8)acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102043003722506129548251010010010000100100005004277313300183003730037282726287401010020010008200200163003730037111020110099100100100001000001117170160029647100001003003830038300383003830038
102043003722406129548251010010010000100100005004277313300183003730037282726287401010020010008200200163003730037111020110099100100100001000001117180160029646100001003003830038300383003830038
102043003722406129548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001003000007101161129634100001003003830038300383003830038
102043003722508229548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000000007101161129634100001003003830038300383003830038
102043003722506129548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000000007101161129634100001003003830038300383003830038
1020430037225010329548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000000007101161129634100001003003830038300383003830038
102043003722506129548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000000007101161129634100001003003830038300383003830038
102043003722506129548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000000007101161129634100001003003830038300383003830038
102043003722406129548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000000007101161129634100001003003830038300383003830038
102043003722506129548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000000007101161129634100001003003830038300383003830038

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 instruction (0a)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)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)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002430037225000000000612954825100101010000101000050427731313001830037300372828703287671001020100002020000300373003711100211091010100001000000006403162229630010000103003830038300383003830038
1002430037225000000000612954825100101010000101000050427731313001830037300372828703287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
1002430037225000000000612954825100101010000101000050427731313001830037300372828703287671001020100002020000300373003711100211091010100001000000006403162229630010000103018030038300383003830038
10024300372250000000006129548251001010100001010000504277313130018300373003728287032876710010201000020200003003730037111002110910101000010000000064021612229630010000103003830038300383003830038
10024300372250000000001262954825100101010000101000050427731313001830037300372828703287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
1002430037226000000000612954825100101010000101000050427731313001830037300372828703287671001020100002020000300373003711100211091010100001000000007073162229630010000103003830038300383003830038
1002430037225000000000612954825100101010000101000050427731313001830037300372828703287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
1002430037225000000000612954825100101010000101000050427731313001830037300372828703287671001020100002020000300373003711100211091010100001000010006403162229630010000103003830038300383003830038
1002430037224000000000612954825100101010000101000050427731313001830037300372828703287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
10024300372250000005100612954825100101010000101000050427731313001830037300372828773287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038

Test 3: Latency 1->3

Code:

  umull 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)03mmu table walk data (08)191e1f3f4e51schedule 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)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020430037225004506129548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
102043003722400006129548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
1020430037225003906129548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000007101161329634100001003003830038300383003830038
102043003722500006129548251010010010000100101485004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
102043003722500006129548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
102043003722500006129548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
102043003722500006129548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
102043003722500006129548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
102043003722500606129548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
102043003722500006129548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129706100001003003830038300383003830038

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)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)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024300372251212429548251001010100001010000504277313130018300373003728287032876710010201000020200003003730037111002110910101000010000640416222963010000103003830038300383003830038
100243008423306129548251001010100001010000504277313030018300373003728287032876710010201000020200003003730037111002110910101000010000640216222963010000103003830038300383003830038
100243003723006129548251001010100001010000504277313030018300373003728287032876710010201000020200003003730037111002110910101000010000640216222963010000103003830038300383003830038
1002430037229396129548251001010100001010000504277313030018300373003728287032876710010201000020200003003730037111002110910101000010000640216222963010000103003830038300383003830038
1002430037229276129548251001010100001010000504277313030018300373003728287032876710010201000020200003003730037111002110910101000010030640216222963010000103003830038300383003830038
100243003722506129548251001010100001010000504277313130018300373003728287032876710010201000020200003003730037111002110910101000010000640216222963010000103003830038300383003830038
100243003722524310329548251001010100001010000504277313030018300373003728292032882410010201000020200003003730037211002110910101000010130640216222963010000103003830038300383003830038
100243003722533310329548251001010100001010000504277313030018300373003728287032876710010201000020200003003730037111002110910101000010030640216222963010000103003830038300383003830038
10024300372257210329548251001010100001010000504278670030018300373003728287032876710010201000020200003003730037111002110910101000010030640216222963010000103003830038300383017030038
100243003724106129548251001010100001010000504277313030018300373003728287032876710010201000020200003003730037111002110910101000010000640216322963010000103003830133301693003830086

Test 4: throughput

Count: 8

Code:

  umull v0.2d, v8.2s, v9.s[1]
  umull v1.2d, v8.2s, v9.s[1]
  umull v2.2d, v8.2s, v9.s[1]
  umull v3.2d, v8.2s, v9.s[1]
  umull v4.2d, v8.2s, v9.s[1]
  umull v5.2d, v8.2s, v9.s[1]
  umull v6.2d, v8.2s, v9.s[1]
  umull 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)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)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)9fst unit uop (a7)l1d cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042004815000412580100100800001008000050064000012002020039200399973399978010020080000200160000200392003911802011009910010080000100000051102161120036800001002004020040200402004020040
8020420039150004125801001008000010080000500640000120020200392003999733999780100200800002001600002003920039118020110099100100800001000104851101161120036800001002004020040200402004020040
802042003915000412580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100000051101161120036800001002004020040200402004020040
8020420039150002312580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100050051101161120036800001002004020040200402004020040
802042003914900412580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100000051101161120036800001002004020040200402004020040
802042003915000412580100100800001008000050064000012002020039200399973399978010020080000200160000200392003911802011009910010080000100000351101161120036800001002004020040200402004020040
802042003915000412580100100800001008000050064000012002020039200399973399978010020080000200160000200392003921802011009910010080000100010351101161120036800001002004020040200402004020040
8020420039150004212580100100800001008000050064000012002020039200399973399978010020080000200160000200392003911802011009910010080000100050351341161120036800001002004020040200402004020040
802042003915000412580100100800001008000050064000012002020039200399973399978010020080000200160000200392003911802011009910010080000100000051101161120036800001002004020040200402004020040
802042003915000412580100100800001008000050064000012002020039200399973399978010020080000200160000200392003911802011009910010080000100000051101161120036800001002004020040200402004020040

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)c2cfd5map dispatch bubble (d6)dbddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242004815004025800101080000108000050640000020020200392003999963100198001020800002016000020039200391180021109101080000100050202160222003680000102004020040200402004020040
800242003915004025800101080000108000050640000020020200392003999963100198001020800002016000020039200391180021109101080000100050202160222003680000102004020040200402004020040
800242003915004025800101080000108000050640000020020200392003999963100198001020800002016000020039200391180021109101080000100050202160222003680000102004020040200402004020040
80024200391502584025800101280000108000050640000020020200392003999963100198001020800002016000020039200391180021109101080000100050202160222003680000102004020040200402004020040
800242003915004025800101080000108000050640000020020200392003999963100198001020800002016000020039200391180021109101080000100050202160222003680000102004020040200402004020040
800242003915004025800101080000108000050640000120020200392003999963100198001020800002016000020039200391180021109101080000100050202160222003680000102004020040200402004020040
80024200391503604025800101080000108000050640000020020200392003999963100198001020800002016000020039200391180021109101080000100050202160222003680000102004020040200402004020040
800242003915004025800101080000108000050640000020020200392003999963100198001020800002016000020039200391180021109101080000100050202160222003680000102004020040200402004020040
800242003915041461025800101080000108000050640000020020200392003999963100198001020800002016000020039200391180021109101080000100050202160222003680000102004020040200402004020040
800242003915094025800101080000108000050640000120020200392003999963100198001020800002016000020039200391180021109101080000100050202160222003680000102004020040200402004020040