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

SABA (vector, 2S)

Test 1: uops

Code:

  saba v0.2s, v1.2s, v2.2s
  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:

  saba v0.2s, v1.2s, v2.2s
  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)dispatch ldst uop (58)int uops in schedulers (59)simd uops in schedulers (5a)ldst uops in schedulers (5b)dispatch uop (78)map int uop (7c)map ldst uop (7d)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)? int output thing (e9)? simd retires (ee)? int retires (ef)
1020430033101011011000010010000030007689051010020001000420030012110000100
1020430033101011011000010010000030007689051010020001000420230129110000100
1020430033101011011000010010000030007689051010020001000420030012110000100
1020430033101011011000010010000030007689051010020001000420030012110000100
1020430033101011011000010010000030007689051010020001000420030012110000100
1020430033101011011000010010000030007689051010020001000420030012110000100
1020430033101011011000010010000030007689051010020001000420030012110000100
1020530066101071011000610010031030007689051010020001000420030012110000100
1020430033101011011000010010000030007689051010020001000420030012110000100
1020430033101011011000010010000030007689051010020001000420030012110000100

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
10024300331002121100002010000707689051002020100002030000111000010
10025300661002721100062010031707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030012111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010

Test 3: Latency 1->2

Code:

  saba v0.2s, v0.2s, v1.2s
  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
1020430033101011011000010010000300768905101002001000420030012110000100
1020430033101011011000010010000300768905101002001000420030012110000100
1020430033101011011000010010000300768905101002001000420030012110000100
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)
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010
10024300331002121100002010000707689051002020100002030000111000010

Test 4: Latency 1->3

Code:

  saba v0.2s, v1.2s, v0.2s
  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
1020430033101011011000010010000300768905101002001000620030012110000100
1020430033101011011000010010000300768905101002001000420030012110000100
1020430033101011011000010010000300768905101002001000420230138210000100
1020430033101011011000010010000300768905101002001000420030012110000100
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)schedule ldst uop (55)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)
100243003310021211000002010000707689051002020100002030000111000010
100243003310021211000002010000707689051002020100002030000111000010
100243003310021211000002010000707689051002020100002030000111000010
100243003310021211000002010000707689051002020100002030000111000010
100243003310021211000002010000707689051002020100002030000111000010
100243003310021211000002010000707689051002020100002030000111000010
100243003310021211000002010000707689051002020100002030000111000010
100243003310021211000002010000707689051002020100002030000111000010
100243003310021211000002010000707689051002020100002030000111000010
100243003310021211000002010000707689051002020100002030000111000010

Test 5: throughput

Count: 8

Code:

  movi v0.16b, 0
  saba v0.2s, v8.2s, v9.2s
  movi v1.16b, 0
  saba v1.2s, v8.2s, v9.2s
  movi v2.16b, 0
  saba v2.2s, v8.2s, v9.2s
  movi v3.16b, 0
  saba v3.2s, v8.2s, v9.2s
  movi v4.16b, 0
  saba v4.2s, v8.2s, v9.2s
  movi v5.16b, 0
  saba v5.2s, v8.2s, v9.2s
  movi v6.16b, 0
  saba v6.2s, v8.2s, v9.2s
  movi v7.16b, 0
  saba v7.2s, v8.2s, v9.2s
  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)
1602044049780109101800081008001230032005680113200800132002400361160000100
1602044010880110101800091008001330032005680113200800132002400361160000100
1602044008680109101800081008001230032005280112200800122002400361160000100
1602044008680109101800081008001230032005280112200800122002400361160000100
1602044008680109101800081008001230032005280112200800122002400361160000100
1602044008680109101800081008001230032005280112200800122002400391160000100
1602044008680109101800081008001230032005680113200800132002400361160000100
1602044008680109101800081008001230032005280112200800122002400361160000100
1602044008680109101800081008001230032005280112200800122002400361160000100
1602044008680109101800081008001230032005680113200800132002400361160000100

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.5053

retire uop (01)cycle (02)schedule uop (52)schedule int uop (53)schedule simd uop (54)schedule ldst uop (55)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)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Test 6: throughput

Count: 16

Code:

  saba v0.2s, v16.2s, v17.2s
  saba v1.2s, v16.2s, v17.2s
  saba v2.2s, v16.2s, v17.2s
  saba v3.2s, v16.2s, v17.2s
  saba v4.2s, v16.2s, v17.2s
  saba v5.2s, v16.2s, v17.2s
  saba v6.2s, v16.2s, v17.2s
  saba v7.2s, v16.2s, v17.2s
  saba v8.2s, v16.2s, v17.2s
  saba v9.2s, v16.2s, v17.2s
  saba v10.2s, v16.2s, v17.2s
  saba v11.2s, v16.2s, v17.2s
  saba v12.2s, v16.2s, v17.2s
  saba v13.2s, v16.2s, v17.2s
  saba v14.2s, v16.2s, v17.2s
  saba v15.2s, v16.2s, v17.2s
  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)dispatch ldst uop (58)int uops in schedulers (59)simd uops in schedulers (5a)ldst uops in schedulers (5b)dispatch uop (78)map int uop (7c)map ldst uop (7d)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)? int output thing (e9)? simd retires (ee)? int retires (ef)
160205801201601431011600421001600540300064004416011020001600142004806331160000100
160204800351601071011600061001600100300064004416011020001600142004800361160000100
160204800351601051011600041001600080300064003616010820001600122004800361160000100
160204800351601051011600041001600080300064084016030920001602132004800361160000100
160204800351601051011600041001600080300064003616010820001600122004800391160000100
160204800351601051011600041001600080300064003616010820001600122004800361160000100
160204800351601051011600041001600080300064003616010820001600122004800361160000100
160205800711601431011600421001600540300064003616010820001600122004800361160000100
160204800351601051011600041001600080300064003616010820001600122004800361160000100
160204800351601051011600041001600080300064003616010820001600122004800361160000100

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)dispatch ldst uop (58)int uops in schedulers (59)simd uops in schedulers (5a)ldst uops in schedulers (5b)dispatch uop (78)map int uop (7c)map ldst uop (7d)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)? int output thing (e9)? simd retires (ee)? int retires (ef)
160024800851600171116000610160010030064000016001020016000020480000116000010
160024800381600111116000010160000030064000016001020016000020480000116000010
160024800351600111116000010160000030064000016001020016000020480000116000010
160024800351600111116000010160000030064000016001020016000020480000116000010
160024800351600111116000010160000030064000016001020016000020480000116000010
160024800361600111116000010160000030064000016001020016000020480000116000010
160024800971600161116000510160009030064000016001020016000020480000116000010
160024800551600111116000010160000030064000016001020016000020480000116000010
160024800351600111116000010160000030064000016001020016000020480000116000010
160024800351600111116000010160000030064000016001020016000020480000116000010