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, 16B)

Test 1: uops

Code:

  saba 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)
1004303310011100010007590510001000300011000
1004303310011100010007590510001000300011000
1004303310011100010007590510001000300011000
1004303310011100010007590510001000300011000
1004303310011100010007590510001000300011000
1004303310011100010007590510001000300011000
1004303310011100010007590510001000300011000
1004303310011100010007590510001000300011000
1004303310011100010007590510001000300011000
1004303310011100010007590510001000300011000

Test 2: Latency 1->1

Code:

  saba 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): 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)
1020430033101011011000010010000300768905101002001000420030012110000100
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 3: Latency 1->2

Code:

  saba 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): 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
1020430033101011011000010010000300768905101002001000420030018110000100
1020430033101011011000010010000300768905101002001000420030012110000100
1020430033101011011000010010000300768905101002001000420030012110000100
1020430033101011011000010010000300768905101002001000420030012110000100
1020530066101091031000610210031300768905101002001000420030012110000100
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 v0.16b, 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): 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 ldst uop inputs (80)map simd uop inputs (81)? int output thing (e9)? ldst retires (ed)? simd retires (ee)? int retires (ef)
1020430033101011011000001001000030076890510100200100062000300181010000100
1020430033101011011000001001000030076890510100200100062000300121010000100
1020430033101011011000001001000030076890510100200100042000300121010000100
1020430033101011011000001001000030076890510100200100042000300121010000100
1020430033101011011000001001000030076890510100200100042000300121010000100
1020430033101011011000001001000030076890510100200100042000300121010000100
1020430033101011011000001001000030076890510100200100042000300121010000100
1020430033101011011000001001000030076890510100200100042000300121010000100
1020430033101011011000001001000030076890510100200100042000300121010000100
1020430033101011011000001001000030076890510100200100042000300121010000100

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)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)
10024300331002121100002010000070076890510020200100042030000111000010
10024300331002121100002010000070076890510020200100002030000111000010
10024300331002121100002010000070076890510020200100002030000111000010
10024300331002121100002010000070076890510020200100002030000111000010
10024300331002121100002010000070076890510020200100002030000111000010
10025300661002721100062010031070076890510020200100002030000111000010
10024300331002121100002010000070076890510020200100002030000111000010
10024300331002121100002010000070076890510020200100002030000111000010
10024300331002121100002010000070076890510020200100002030000111000010
10024300331002121100002010000070076890510020200100002030000111000010

Test 5: throughput

Count: 8

Code:

  movi v0.16b, 0
  saba v0.16b, v8.16b, v9.16b
  movi v1.16b, 0
  saba v1.16b, v8.16b, v9.16b
  movi v2.16b, 0
  saba v2.16b, v8.16b, v9.16b
  movi v3.16b, 0
  saba v3.16b, v8.16b, v9.16b
  movi v4.16b, 0
  saba v4.16b, v8.16b, v9.16b
  movi v5.16b, 0
  saba v5.16b, v8.16b, v9.16b
  movi v6.16b, 0
  saba v6.16b, v8.16b, v9.16b
  movi v7.16b, 0
  saba 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)
1602044052980110101800091008001330032005680113200800132002400391160000100
1602044011080110101800091008001330032005280112200800122002400361160000100
1602044008680109101800081008001230032005280112200800122002400361160000100
1602044008680109101800081008001230032005280112200800122002400361160000100
1602044008680109101800081008001230032005280112200800122002400361160000100
1602044008680109101800081008001230032005280112200800122002400361160000100
1602044008680109101800081008001230032005280112200800122002401441160000100
1602044008680109101800081008001230032005280112200800122002400361160000100
1602044008680109101800081008001230032005280112200800122002400361160000100
1602044008680109101800081008001230032005280112200800122002400361160000100

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.5055

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)
1600244396580019118000810800123032005680023208001320240000116000010
1600244124580011118000010800003032000080010208000020240000116000010
1600244039180011118000010800003032000080010208000020240000116000010
1600244041880011118000010800003032000080010208000020240000116000010
1600244042880011118000010800003032000080010208000020240000116000010
1600244041780011118000010800003032000080010208000020240000116000010
1600254057480054118004310800473032005680023208001320240000116000010
1600244052580011118000010800003032000080010208000020240000116000010
1600244038280011118000010800003032000080010208000020240000116000010
1600244057680011118000010800003032000080010208000020240000116000010

Test 6: throughput

Count: 16

Code:

  saba v0.16b, v16.16b, v17.16b
  saba v1.16b, v16.16b, v17.16b
  saba v2.16b, v16.16b, v17.16b
  saba v3.16b, v16.16b, v17.16b
  saba v4.16b, v16.16b, v17.16b
  saba v5.16b, v16.16b, v17.16b
  saba v6.16b, v16.16b, v17.16b
  saba v7.16b, v16.16b, v17.16b
  saba v8.16b, v16.16b, v17.16b
  saba v9.16b, v16.16b, v17.16b
  saba v10.16b, v16.16b, v17.16b
  saba v11.16b, v16.16b, v17.16b
  saba v12.16b, v16.16b, v17.16b
  saba v13.16b, v16.16b, v17.16b
  saba v14.16b, v16.16b, v17.16b
  saba 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 simd uop inputs (81)? int output thing (e9)? simd retires (ee)? int retires (ef)
160204800751601071011600061001600103006400441601102001600142004801831160000100
160204800451601071011600061001600103006400441601102001600142004800361160000100
160204800351601051011600041001600083006400361601082001600122004800361160000100
160204800351601051011600041001600083006400361601082001600122004800361160000100
160204800351601051011600041001600083006400361601082001600122004800361160000100
160204800351601051011600041001600083006400361601082001600122004800361160000100
160204800351601051011600041001600083006402161601562001600642004800361160000100
160204800351601051011600041001600083006402161601562001600642004800361160000100
160204800461601071011600061001600103006400361601082001600122004800361160000100
160204800351601051011600041001600083006400361601082001600122004800361160000100

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 ldst uop inputs (80)map simd uop inputs (81)? int output thing (e9)? ldst retires (ed)? simd retires (ee)? int retires (ef)
16002480097160016111600051016000930640044160020201600142004800421016000010
16002480035160011111600001016000030640000160010201600002004800001016000010
16002480035160011111600001016000030640000160010201600002004800001016000010
16002480035160011111600001016000030640000160010201600002004804411016000010
16002480035160011111600001016000030640000160010201600002004800001016000010
16002480035160011111600001016000030640000160010201600002004800001016000010
16002480035160011111600001016000030640000160010201600002004800001016000010
16002480035160011111600001016000030640000160010201600002004800001016000010
16002480035160011111600001016000030640000160010201600002004800001016000010
16002480035160011111600001016000030640000160010201600002004800001016000010