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, 16B)

Test 1: uops

Code:

  bif v0.16b, v1.16b, v2.16b
  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 v0.16b, v1.16b, v2.16b
  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)
1020420033101011011000010010000307510296101742021008720430264310000100
1020420033101011011000010010000300509248101002001000420230270210000100
1020420136101251011002410010072300510312101722001008820230258210000100
1020420033101011011000010010000307509780101382021005020030258110000100
1020420033101011011000010010000300509248101002001000420030012110000100
1020420033101011011000010010000300509248101002001000420030012110000100
1020420033101011011000010010000300509248101002001000420030012110000100
1020420033101011011000010010000300509248101002001000420030012110000100
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
10024200331002121100002010000705092481002020100002030138111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010

Test 3: Latency 1->2

Code:

  bif v0.16b, v0.16b, v1.16b
  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 ldst uop inputs (80)map simd uop inputs (81)? int output thing (e9)? ldst retires (ed)? simd retires (ee)? int retires (ef)
102042003310101101100001001000030050924810100200100062000300181010000100
102042003310101101100001001000030050924810100200100042000300121010000100
102042003310101101100001001000030050924810100200100042000300121010000100
102042003310101101100001001000030050924810100200100042000300121010000100
102042003310101101100001001000030050958010134200100482000300121010000100
102042003310101101100001001000030050924810100200100042000300121010000100
102042003310101101100001001000030050924810100200100042000300121010000100
102042003310101101100001001000030050924810100200100042000300121010000100
102042003310101101100001001000030050924810100200100042000300121010000100
102042003310101101100001001000030050924810100200100042000301321010000100

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)
10024200331002121100002010000705092471002020100062030018111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010
10024200331002121100002010000705092481002020100002030000111000010

Test 4: Latency 1->3

Code:

  bif v0.16b, v1.16b, v0.16b
  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
1020420033101011011000010010000300509248101002001000420030012110000100
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
10024200331002121100002010000705092481002020100042030000111000010

Test 5: throughput

Count: 8

Code:

  movi v0.16b, 0
  bif v0.16b, v8.16b, v9.16b
  movi v1.16b, 0
  bif v1.16b, v8.16b, v9.16b
  movi v2.16b, 0
  bif v2.16b, v8.16b, v9.16b
  movi v3.16b, 0
  bif v3.16b, v8.16b, v9.16b
  movi v4.16b, 0
  bif v4.16b, v8.16b, v9.16b
  movi v5.16b, 0
  bif v5.16b, v8.16b, v9.16b
  movi v6.16b, 0
  bif v6.16b, v8.16b, v9.16b
  movi v7.16b, 0
  bif v7.16b, v8.16b, v9.16b
  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)
1602044050380109101800081008001230032005680113200800132002401441160000100
1602044012180109101800081008001230032005280112200800122002400391160000100
1602044008680109101800081008001230032005280112200800122002400361160000100
1602044008680109101800081008001230032005280112200800122002400361160000100
1602044008680109101800081008001230032005680113200800132002400361160000100
1602044008680109101800081008001230032005280112200800122002400361160000100
1602044008680109101800081008001230032005280112200800122002400361160000100
1602044008680109101800081008001230032005280112200800122002400361160000100
1602044008680109101800081008001230032005280112200800122002400361160000100
1602044008680109101800081008001230032005280112200800122002400361160000100

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.5054

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)
1600244385880019118000810800123032005680023208001320240000116000010
1600244122380011118000010800003032000080010208000020240000116000010
1600244042680011118000010800003032000080010208000020240000116000010
1600244040380011118000010800003032000080010208000020240000116000010
1600244042680011118000010800003032000080010208000020240000116000010
1600244039980011118000010800003032000080010208000020240000116000010
1600244038780011118000010800003032000080010208000020240000116000010
1600244044780011118000010800003032000080010208000020240000116000010
1600244041780011118000010800003032000080010208000020240000116000010
1600244041780011118000010800003032000080010208000020240000116000010

Test 6: throughput

Count: 16

Code:

  bif v0.16b, v16.16b, v17.16b
  bif v1.16b, v16.16b, v17.16b
  bif v2.16b, v16.16b, v17.16b
  bif v3.16b, v16.16b, v17.16b
  bif v4.16b, v16.16b, v17.16b
  bif v5.16b, v16.16b, v17.16b
  bif v6.16b, v16.16b, v17.16b
  bif v7.16b, v16.16b, v17.16b
  bif v8.16b, v16.16b, v17.16b
  bif v9.16b, v16.16b, v17.16b
  bif v10.16b, v16.16b, v17.16b
  bif v11.16b, v16.16b, v17.16b
  bif v12.16b, v16.16b, v17.16b
  bif v13.16b, v16.16b, v17.16b
  bif v14.16b, v16.16b, v17.16b
  bif v15.16b, v16.16b, v17.16b
  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 ldst uop inputs (80)map simd uop inputs (81)? int output thing (e9)? ldst retires (ed)? simd retires (ee)? int retires (ef)
16020480131160105101160004100160008300640044160110200160014200048003910160000100
16020480034160107101160006100160010300640036160108200160012200048003610160000100
16020480034160105101160004100160008300640036160108200160012200048003610160000100
16020480034160105101160004100160008300640044160110200160014200048004210160000100
16020480034160105101160004100160008300640036160108200160012200048003610160000100
16020480034160105101160004100160008300640036160108200160012200048018610160000100
16020480034160107101160006100160010300640036160108200160012200048003610160000100
16020480034160105101160004100160008300640036160108200160012200048003610160000100
16020480034160105101160004100160008300640036160108200160012200048003610160000100
16020480034160105101160004100160008300640192160150200160060200048003610160000100

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)
160024801001600171116000610160010306402001600622016006120480042116000010
160024800351600111116000010160000306400001600102016000020480000116000010
160024800341600111116000010160000306400001600102016000020480000116000010
160024800341600111116000010160000306400001600102016000020480000116000010
160024800341600111116000010160000306400001600102016000020480000116000010
160024800341600111116000010160000306400001600102016000020480180116000010
160024800341600111116000010160000306400001600102016000020480000116000010
160024800341600111116000010160000306400001600102016000020480000116000010
160024800341600111116000010160000306400001600102016000020480000116000010
160024800341600111116000010160000306400001600102016000020480000116000010