Apple M1 Microarchitecture Research by Dougall Johnson

Firestorm: Overview | Base Instructions | SIMD and FP Instructions
Icestorm:  Overview | Base Instructions | SIMD and FP Instructions

DUP (element, vector, 2D)

Test 1: uops

Code:

  dup v0.2d, v0.d[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 (01)cycle (02)03071e3f4e51inst issue (52)~issue fp/simd (54)~dispatch fp/simd (57)huge thing fp/simd (5b)696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op fp/simd (7e)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst neon or fp (9a)a8accfd5d6ddinst fetch restart (de)e0? fp/simd (ee)f5f6f7f8fd
100420371500611686251000100010002645212018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
1004203715001431686251000100010002645212018203720371571318951000100010002037203711100110000075116111786100020382038203820382038
1004203715001561686251000100010002645212018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
1004203716001671686251000100010002645212018203720371571318951000100010002037203711100110000075116111786100020382038203820382038
1004203715001431686251000100010002645212018203720371571318951000100010002037203711100110000073116111786100020382038203820862038
100420371503611686251000100010002645212018203720371570318951000100010002037203711100110000375116111786100020382038203820382038
100420371600611686251000100010002645212018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
1004203716001431686251000100010002645212018203720371571318951000100010002084203711100110000073116111786100020382038203820382038
100420371500611686251000100010002645212018203720371571318951000100010002037203711100110000075116111786100020382038203820382038
1004203715001681686251000100010002645212018203720371571318951000100010002037203711100110000073116111786100020382038203820382038

Test 2: Latency 1->2

Code:

  dup v0.2d, v0.d[1]
  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 2.0037

retire (01)cycle (02)031e3f4e51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa1a6c2c5cdcfd5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
1020420037150019119686251011410010000100100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
1020420037150016819686251010010010000100100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
102042003715008219686251010010010000100100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521200182003720088184253187451010020010000200100002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521200182003720037184213187451010020010000200100002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
10204200371500147196862510100100100001001000050028475212001820037200371842131874510100200100002001000020037200371110201100991001001000010000010710116111979127100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire (01)cycle (02)03191e3f4e51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)60696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa7a8a9accfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
1002420037150006119686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100000640516221978610000102003820038200382003820038
1002420037150006119686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
1002420037150006119686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
1002420037150006119686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
1002420037150006119686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100103640316221978610000102003820038200382003820038
1002420037150006119686251001010100001010000502847521120018200372008418443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
1002420037155036119686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
10024200371500017819686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
1002420037150006119686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100100640316221978610000102003820038200382003820038
10024200371500910319686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  dup v0.2d, v8.d[1]
  dup v1.2d, v8.d[1]
  dup v2.2d, v8.d[1]
  dup v3.2d, v8.d[1]
  dup v4.2d, v8.d[1]
  dup v5.2d, v8.d[1]
  dup v6.2d, v8.d[1]
  dup v7.2d, v8.d[1]
  movi v8.16b, 9

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.2505

retire (01)cycle (02)03091e3f51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)60696b6d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa8acc5branch mispredict (cb)cdcfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
8020420038150002925801081008000810080020500640132120019020038200389977699898012020080032200800322003820038118020110099100100800001000011151182162220035800001002003920039200392003920039
8020420038150102925801081008000810080020500640132120019020038200389977699898012020080032200800322003820038118020110099100100800001000011151181161220035800001002003920039200392003920039
80204200381500034325801081008000810080020500640132120019020038200389977699898012020080032200800322003820038118020110099100100800001000011151181162220035800001002003920039200392003920039
8020420038150005725801081008000810080020500640132120019020038200389977699898012020080032200800322003820038118020110099100100800001000011151182161220035800001002003920039200392003920039
8020420038150002925801081008000810080020500640132020019020038200389977699898012020080032200800322003820038118020110099100100800001000011151182161120035800001002003920039200392003920039
8020420038150002925801081008000810080020500640132020019020038200389977699898012020080032200800322003820038118020110099100100800001000011151181161220035800001002003920039200392003920039
8020420038150002925801081008000810080020500640132120019020038200389977699898012020080032200800322003820038118020110099100100800001000011151181162220035800001002003920039200392003920039
8020420038150002925801081008000810080020500640132120019020038200389977699898012020080032200800322003820038118020110099100100800001000011151182162120035800001002003920039200392003920039
80204200381500011325801081008000810080020500640132020019020038200389977699898012020080032200800322003820038118020110099100100800001000011151181162220035800001002003920039200392003920039
8020420038150002925801081008000810080020500640132120019020038200389977699898012020080032200800322003820038118020110099100100800001000011151182161220035800001002003920039200392003920039

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.2505

retire (01)cycle (02)0307080a0b18191e1f3a3f51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)60696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa0a1a6a8a9accfd2d5d6ddinst fetch restart (de)e0eb? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
8002420050150000000000104258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010000000502011216211820035080000102003920039200392003920039
800242003815000000000039258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010000000502002316202520035080000102003920039200392003920039
800242003815000000000039258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010000000502002716252520035080000102003920039200392003920039
800242003815000000000039258001010800001080000506400001200782009820038999631001880010208000020800002003820038118002110910108000010000000502002016252020035080000102003920039200392003920039
800242003815000000000039258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010000000502002116252020035080000102003920039200392003920039
800242003815000000000039258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010000000502002516252420035080000102003920039200392003920039
8002420038150000000000102258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010000000502001916242220035080000102003920039200392003920039
800242003815000000000039258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010000000502002516252320035080000102003920039200392003920039
8002420038150000000000392580010108000010800005064000012001920038200381000431001880010208000020800002003820038118002110910108000010000000502002416242320035080000102003920039200392003920039
800242003815000000000039258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010000000502002516251520035080000102003920039200392003920039