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

BIF (vector, 8B)

Test 1: uops

Code:

  bif v0.8b, v1.8b, v2.8b
  movi v0.16b, 1
  movi v1.16b, 2
  movi v2.16b, 3

(no loop instructions)

1000 unrolls and 1 iteration

Retires: 1.000

Issues: 1.000

Integer unit issues: 0.001

Load/store unit issues: 0.000

SIMD/FP unit issues: 1.000

retire uop (01)cycle (02)schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch simd uop (57)ldst uops in schedulers (5b)dispatch uop (78)map simd uop (7e)map simd uop inputs (81)? int output thing (e9)? simd retires (ee)
1004203310011100010005024810001000300011000
1004203310011100010005024810001000300011000
1004203310011100010005024810001000300011000
1004203310011100010005024810001000300011000
1004203310011100010005024810001000300011000
1004203310011100010005024810001000300011000
1004203310011100010005024810001000300011000
1004203310011100010005024810001000300011000
1004203310011100010005024810001000300011000
1004203310011100010005024810001000300011000

Test 2: Latency 1->1

Code:

  bif v0.8b, v1.8b, v2.8b
  movi v0.16b, 1
  movi v1.16b, 2
  movi v2.16b, 3

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 2.0033

retire uop (01)cycle (02)schedule 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)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)? int output thing (e9)? simd retires (ee)? int retires (ef)
1020420033101011011000010010000300509248101002001000420030012110000100
1020420033101011011000010010000300509248101002001000420030012110000100
1020420033101011011000010010000300509248101002001000420030012110000100
1020420033101011011000010010000300509248101002001000420030012110000100
1020420033101011011000010010000300509248101002001000420030012110000100
1020420033101011011000010010000300509248101002001000420030012110000100
1020420033101011011000010010000300509248101002001000420030012110000100
1020420033101011011000010010000307509780101382021005020030012110000100
1020420033101011011000010010000314511376102482041017220630510410000100
1020420240101521041004810310144300509248101002001000420030012110000100

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0033

retire uop (01)cycle (02)schedule 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)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)? int output thing (e9)? simd retires (ee)? int retires (ef)
10024200331002121100002010000705092461002020100042030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010

Test 3: Latency 1->2

Code:

  bif v0.8b, v0.8b, v1.8b
  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 2.0033

retire uop (01)cycle (02)schedule 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)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)? int output thing (e9)? simd retires (ee)? int retires (ef)
1020420033101011011000010010000300509248101002001000620030018110000100
1020420033101011011000010010000300509248101002001000420030012110000100
1020420033101011011000010010000300509248101002001000420030012110000100
1020420033101011011000010010000300509248101002001000420030012110000100
1020420033101011011000010010000300509248101002001000420030012110000100
1020420033101011011000010010000300509248101002001000420030012110000100
1020420033101011011000010010000300509248101002001000420030012110000100
1020520066101091011000810210034300509248101002001000420030012110000100
1020420033101011011000010010000300509248101002001000420030012110000100
1020420033101011011000010010000300509248101002001000420030012110000100

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0033

retire uop (01)cycle (02)schedule 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)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)? int output thing (e9)? simd retires (ee)? int retires (ef)
10024200331002121100002010000705092471002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10025200661002921100082010034705092481002020100002030000111000010

Test 4: Latency 1->3

Code:

  bif v0.8b, v1.8b, v0.8b
  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 2.0033

retire uop (01)cycle (02)schedule 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)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)? int output thing (e9)? simd retires (ee)? int retires (ef)
1020420033101011011000010010000300509248101002001000620030018110000100
1020420033101011011000010010000300509248101002001000420030012110000100
1020420033101011011000010010000300509248101002001000420030012110000100
1020420033101011011000010010000300509248101002001000420030012110000100
1020420033101011011000010010000300509248101002001000420030012110000100
1020420033101011011000010010000300509248101002001000420030012110000100
1020420033101011011000010010000300509248101002001000420030012110000100
1020420033101011011000010010000300509248101002001000420030138110000100
1020420033101011011000010010000300509248101002001000420030012110000100
1020420033101011011000010010000300509248101002001000420030012110000100

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0033

retire uop (01)cycle (02)schedule 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)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)? int output thing (e9)? simd retires (ee)? int retires (ef)
10024200331002121100002010000705092471002020100062030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010

Test 5: throughput

Count: 8

Code:

  movi v0.16b, 0
  bif v0.8b, v8.8b, v9.8b
  movi v1.16b, 0
  bif v1.8b, v8.8b, v9.8b
  movi v2.16b, 0
  bif v2.8b, v8.8b, v9.8b
  movi v3.16b, 0
  bif v3.8b, v8.8b, v9.8b
  movi v4.16b, 0
  bif v4.8b, v8.8b, v9.8b
  movi v5.16b, 0
  bif v5.8b, v8.8b, v9.8b
  movi v6.16b, 0
  bif v6.8b, v8.8b, v9.8b
  movi v7.16b, 0
  bif v7.8b, v8.8b, v9.8b
  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): 0.5011

retire uop (01)cycle (02)schedule 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)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)? int output thing (e9)? simd retires (ee)? int retires (ef)
1602044049980109101800081008001230032005680113200800132002400361160000100
1602044011280110101800091008001330032005280112200800122002400361160000100
1602044008680109101800081008001230032005280112200800122002400361160000100
1602044008680109101800081008001230032005280112200800122002400361160000100
1602044008680109101800081008001230032020080149200800492002400361160000100
1602044008680109101800081008001230032005280112200800122002400361160000100
1602044008680109101800081008001230032005280112200800122002400361160000100
1602044008680109101800081008001230032005280112200800122002400361160000100
1602044008680109101800081008001230032005280112200800122002400361160000100
1602044008680109101800081008001230032005280112200800122002400361160000100

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.5052

retire uop (01)cycle (02)schedule 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)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map ldst uop inputs (80)map simd uop inputs (81)? int output thing (e9)? ldst retires (ed)? simd retires (ee)? int retires (ef)
160024438328002011800091080013303200568002320800132002400001016000010
160024411828001111800001080000303200008001020800002002400001016000010
160024404178001111800001080000303200008001020800002002400001016000010
160024403948001111800001080000303200008001020800002002400001016000010
160024404218001111800001080000303200008001020800002002400001016000010
160024403948001111800001080000303200008001020800002002400001016000010
160024409708001111800001080000303200008001020800002002400001016000010
160024403908001111800001080000303200008001020800002002400001016000010
160024404178001111800001080000303200008001020800002002400001016000010
160024404328001111800001080000303200008001020800002002401411016000010

Test 6: throughput

Count: 16

Code:

  bif v0.8b, v16.8b, v17.8b
  bif v1.8b, v16.8b, v17.8b
  bif v2.8b, v16.8b, v17.8b
  bif v3.8b, v16.8b, v17.8b
  bif v4.8b, v16.8b, v17.8b
  bif v5.8b, v16.8b, v17.8b
  bif v6.8b, v16.8b, v17.8b
  bif v7.8b, v16.8b, v17.8b
  bif v8.8b, v16.8b, v17.8b
  bif v9.8b, v16.8b, v17.8b
  bif v10.8b, v16.8b, v17.8b
  bif v11.8b, v16.8b, v17.8b
  bif v12.8b, v16.8b, v17.8b
  bif v13.8b, v16.8b, v17.8b
  bif v14.8b, v16.8b, v17.8b
  bif v15.8b, v16.8b, v17.8b
  movi v16.16b, 17
  movi v17.16b, 18

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.5002

retire uop (01)cycle (02)schedule 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)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)? int output thing (e9)? simd retires (ee)? int retires (ef)
160204800631601061011600051001600093006400441601102001600142004800421160000100
160205800791601431011600421001600543006400441601102001600142004800421160000100
160204800341601051011600041001600083006400361601082001600122004800361160000100
160204800341601051011600041001600083006400361601082001600122004800361160000100
160204800341601051011600041001600083006400361601082001600122004800361160000100
160204800341601051011600041001600083006402081601542001600642004800361160000100
160204800341601051011600041001600083006400361601082001600122004800361160000100
160204800341601051011600041001600083006400361601082001600122004800361160000100
160204800341601051011600041001600083006400361601082001600122004800361160000100
160204800341601051011600041001600083006400361601082001600122004800361160000100

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.5002

retire uop (01)cycle (02)schedule 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)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)? int output thing (e9)? simd retires (ee)? int retires (ef)
160024802191600151116000410160008306400401600192016001320480183116000010
160024800771600111116000010160000306400001600102016000020480000116000010
160024800341600111116000010160000306400001600102016000020480000116000010
160024800341600111116000010160000306400001600102016000020480000116000010
160024800341600111116000010160000306400001600102016000020480000116000010
160024800341600111116000010160000306400001600102016000020480000116000010
160024800341600111116000010160000306400001600102016000020480000116000010
160024800341600111116000010160000306400001600102016000020480180116000010
160024800341600111116000010160000306400001600102016000020480000116000010
160024800341600111116000010160000306400001600102016000020480000116000010