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

RADDHN2 (4S)

Test 1: uops

Code:

  raddhn2 v0.8h, v1.4s, v2.4s
  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)
1004303310011100010007590510001000300011000
1004303310011100010007590510001000300011000
1004303310011100010007590510001000300011000
1004303310011100010007590510001000300011000
1004303310011100010007590510001000300011000
1004303310011100010007590510001000300011000
1004303310011100010007590510001000300011000
1004303310011100010007590510001000300011000
1004303310011100010007590510001000300011000
1004303310011100010007590510001000300011000

Test 2: Latency 1->1

Code:

  raddhn2 v0.8h, v1.4s, v2.4s
  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): 3.0033

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)
1020430033101011011000010010000300769247101312001004420030012110000100
1020430033101011011000010010000300768905101002001000420030012110000100
1020430033101011011000010010000300768905101002001000420030012110000100
1020430033101011011000010010000300768905101002001000420030012110000100
1020530066101071011000610010031300768905101002001000420030012110000100
1020430033101011011000010010000300768905101002001000420030012110000100
1020430033101011011000010010000300768905101002001000420030012110000100
1020430033101011011000010010000300768905101002001000420030012110000100
1020430033101011011000010010000300768905101002001000420030012110000100
1020430033101011011000010010000300768905101002001000420030012110000100

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0033

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)
10024300331002121100002010000707689051002020100042030000111000010
10025300661002721100062010031707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010

Test 3: Latency 1->2

Code:

  raddhn2 v0.8h, v0.4s, v1.4s
  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 3.0033

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)
1020430033101011011000010010000300768905101002001000620030018110000100
1020430033101011011000010010000300768905101002001000420030012110000100
1020530066101071011000610010031300768905101002001000620030012110000100
1020430033101011011000010010000300768905101002001000420030012110000100
1020430033101011011000010010000300768905101002001000420230138210000100
1020430033101011011000010010000300768905101002001000420030012110000100
1020430033101011011000010010000300768905101002001000420030012110000100
1020430033101011011000010010000300768905101002001000420030012110000100
1020530066101091031000610210031300768905101002001000420030012110000100
1020430033101011011000010010000300768905101002001000620030018110000100

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0033

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)
10024300851003123100082210033707689051002020100042030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030132111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010

Test 4: Latency 1->3

Code:

  raddhn2 v0.8h, v1.4s, v0.4s
  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 3.0033

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)
1020430033101011011000010010000300768905101002001000620030012110000100
1020430033101011011000010010000300768905101002001000420030012110000100
1020430033101011011000010010000300768905101002001000420030012110000100
1020430033101011011000010010000300768905101002001000420030012110000100
1020430033101011011000010010000300768905101002001000420030012110000100
1020430033101011011000010010000300768905101002001000420030012110000100
1020430033101011011000010010000300768905101002001000420430489310000100
1020430033101011011000010010000300768905101002001000420030012110000100
1020530066101071011000610010031300769997101662001008420030012110000100
1020430033101011011000010010000300768905101002001000420030012110000100

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0033

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)
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000697692471005120100482030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010

Test 5: throughput

Count: 8

Code:

  movi v0.16b, 0
  raddhn2 v0.8h, v8.4s, v9.4s
  movi v1.16b, 0
  raddhn2 v1.8h, v8.4s, v9.4s
  movi v2.16b, 0
  raddhn2 v2.8h, v8.4s, v9.4s
  movi v3.16b, 0
  raddhn2 v3.8h, v8.4s, v9.4s
  movi v4.16b, 0
  raddhn2 v4.8h, v8.4s, v9.4s
  movi v5.16b, 0
  raddhn2 v5.8h, v8.4s, v9.4s
  movi v6.16b, 0
  raddhn2 v6.8h, v8.4s, v9.4s
  movi v7.16b, 0
  raddhn2 v7.8h, v8.4s, v9.4s
  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 ldst uop inputs (80)map simd uop inputs (81)? int output thing (e9)? ldst retires (ed)? simd retires (ee)? int retires (ef)
160204404958010910180008100800123003200568011320080013200024003910160000100
160204401198011010180009100800133003200528011220080012200024003610160000100
160204400868010910180008100800123003200528011220080012200024003610160000100
160204400868010910180008100800123003200528011220080012200024003610160000100
160204400868010910180008100800123003200528011220080012200024003610160000100
160204400868010910180008100800123003200528011220080012200024003610160000100
160204400868010910180008100800123003200528011220080012200024003610160000100
160204400868010910180008100800123003200528011220080012200024003610160000100
160204400868010910180008100800123003200528011220080012200024014410160000100
160204400868010910180008100800123003200568011320080013200024003910160000100

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)
1600244397980020118000910800133032005680023208001320240039116000010
1600254185780031118002010800243032000080010208000020240000116000010
1600244040480011118000010800003032000080010208000020240000116000010
1600244042580011118000010800003032000080010208000020240000116000010
1600244044080011118000010800003032000080010208000020240000116000010
1600244039380011118000010800003032000080010208000020240000116000010
1600254061380056118004510800493032000080010208000020240000116000010
1600244042980011118000010800003032000080010208000020240000116000010
1600244042180011118000010800003032000080010208000020240000116000010
1600244039280011118000010800003032000080010208000020240000116000010

Test 6: throughput

Count: 16

Code:

  raddhn2 v0.8h, v16.4s, v17.4s
  raddhn2 v1.8h, v16.4s, v17.4s
  raddhn2 v2.8h, v16.4s, v17.4s
  raddhn2 v3.8h, v16.4s, v17.4s
  raddhn2 v4.8h, v16.4s, v17.4s
  raddhn2 v5.8h, v16.4s, v17.4s
  raddhn2 v6.8h, v16.4s, v17.4s
  raddhn2 v7.8h, v16.4s, v17.4s
  raddhn2 v8.8h, v16.4s, v17.4s
  raddhn2 v9.8h, v16.4s, v17.4s
  raddhn2 v10.8h, v16.4s, v17.4s
  raddhn2 v11.8h, v16.4s, v17.4s
  raddhn2 v12.8h, v16.4s, v17.4s
  raddhn2 v13.8h, v16.4s, v17.4s
  raddhn2 v14.8h, v16.4s, v17.4s
  raddhn2 v15.8h, v16.4s, v17.4s
  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)
160204800641601071011600061001600103006400441601102001600142004800391160000100
160204800351601071011600061001600103006400361601082001600122004800361160000100
160204800351601051011600041001600083006400441601102001600132004800361160000100
160204800351601051011600041001600083006400361601082001600122004800361160000100
160204800351601051011600041001600083006400361601082001600122004801921160000100
160204800351601071011600061001600103006400361601082001600122004800361160000100
160204800351601051011600041001600083006400361601082001600122004800361160000100
160204800351601051011600041001600083006400361601082001600122004800361160000100
160205800711601451011600441001600563006400361601082001600122004800361160000100
160205800911601421011600411001600533006400361601082001600122004800391160000100

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)
160024802491600151116000410160008306400441600202016001420480000116000010
160024800571600111116000010160000306400001600102016000020480000116000010
160024800401600111116000010160000306400001600102016000020480000116000010
160024800401600111116000010160000306400001600102016000020480000116000010
160024800401600111116000010160000306400001600102016000020480000116000010
160024800371600111116000010160000306400001600102016000020480000116000010
160024801561600181116000710160011306402201600672016006420480000116000010
160024800351600111116000010160000306400001600102016000020480000116000010
160024800401600111116000010160000306400001600102016000020480000116000010
160025800751600561116004510160057306400001600102016000020480000116000010