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

SUQADD (scalar, S)

Test 1: uops

Code:

  suqadd s0, s1
  movi v0.16b, 1
  movi v1.16b, 2

(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)
1004303310011100010007590510001000200011000
1004303310011100010007590510001000200011000
1004303310011100010007590510001000200011000
1004303310011100010007590510001000200011000
1004303310011100010007590510001000200011000
1004303310011100010007590510001000200011000
1004303310011100010007590510001000200011000
1004303310011100010007590510001000200011000
1004303310011100010007590510001000200011000
1004303310011100010007590510001000200011000

Test 2: Latency 1->1

Code:

  suqadd s0, s1
  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 simd uop inputs (81)? int output thing (e9)? simd retires (ee)? int retires (ef)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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 ldst uop inputs (80)map simd uop inputs (81)? int output thing (e9)? ldst retires (ed)? simd retires (ee)? int retires (ef)
1002530066100272110006201003170768905100202010006200200001101000010
1002430033100212110000201000070768905100202010000200200001101000010
1002430033100212110000201000070768905100202010000200200001101000010
1002430033100212110000201000070768905100202010000200200001101000010
1002430033100212110000201000070768905100202010000200200001101000010
1002430033100212110000201000070768905100202010000200200001101000010
1002430033100212110000201000070768905100202010000200200001101000010
1002430033100212110000201000070768905100202010000200200001101000010
1002430033100212110000201000070768905100202010000200200881101000010
10024300331002121100002010000707689051002020100001842133520246786638100031060

Test 3: Latency 1->2

Code:

  suqadd s0, s0
  movi v0.16b, 1

(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)
1020430033101011011000010010000300768905101002001000420020008110000100
1020430033101011011000010010000300768905101002001000420020008110000100
1020430033101011011000010010000300768905101002001000420220092210000100
1020430033101011011000010010000300768905101002001000420020008110000100
1020430033101011011000010010000300768905101002001000420020008110000100
1020430033101011011000010010000300768905101002001000420020008110000100
1020430033101011011000010010000300768905101002001000420020008110000100
1020430033101011011000010010000300768905101002001000420020008110000100
1020430033101011011000010010000300768905101002001000420020008110000100
1020430033101011011000010010000300768905101002001000420020008110000100

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)
10024300331002121100002010000707689051002020100042020000111000010
10024300331002121100002010000707689051002020100002020000111000010
10024300331002121100002010000707689051002020100002020000111000010
10024300331002121100002010000707689051002020100002020000111000010
10024300331002121100002010000707689051002020100002020000111000010
10024300331002121100002010000707689051002020100002020000111000010
10024300331002121100002010000707689051002020100002020000111000010
10024300331002121100002010000707689051002020100002020000111000010
10024300331002121100002010000707689051002020100002020000111000010
10024300331002121100002010000707689051002020100002020000111000010

Test 4: throughput

Count: 8

Code:

  movi v0.16b, 0
  suqadd s0, s8
  movi v1.16b, 0
  suqadd s1, s8
  movi v2.16b, 0
  suqadd s2, s8
  movi v3.16b, 0
  suqadd s3, s8
  movi v4.16b, 0
  suqadd s4, s8
  movi v5.16b, 0
  suqadd s5, s8
  movi v6.16b, 0
  suqadd s6, s8
  movi v7.16b, 0
  suqadd s7, s8
  movi v8.16b, 9

(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)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)
16020440445801101018000901008001330032005680113200800132001600961160000100
16020440155801091018000801008001230032005680113200800132001600241160000100
16020440086801091018000801008001230032005280112200800122001600241160000100
16020440086801091018000801008001230032005280112200800122001600241160000100
16020440096801101018000901008001330032005280112200800122001600241160000100
16020440086801091018000801008001230032005280112200800122001600241160000100
16020440086801091018000801008001230032005280112200800122001600241160000100
16020440086801091018000801008001230032005280112200800122001600241160000100
16020440086801091018000801008001230032005280112200800122001600241160000100
16020440086801091018000801008001230032005280112200800122001600241160000100

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)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)
1600244396380020118000910800133032000080010208000020160000116000010
1600244126280011118000010800003032000080010208000020160000116000010
1600244044280011118000010800003032000080010208000020160000116000010
1600244038480011118000010800003032000080010208000020160000116000010
1600244042580011118000010800003032000080010208000020160000116000010
1600244041080011118000010800003032000080010208000020160000116000010
1600244042180011118000010800003032000080010208000020160000116000010
1600244039780011118000010800003032000080010208000020160000116000010
1600244042980011118000010800003032000080010208000020160000116000010
1600244042980011118000010800003032000080010208000020160000116000010

Test 5: throughput

Count: 16

Code:

  suqadd s0, s16
  suqadd s1, s16
  suqadd s2, s16
  suqadd s3, s16
  suqadd s4, s16
  suqadd s5, s16
  suqadd s6, s16
  suqadd s7, s16
  suqadd s8, s16
  suqadd s9, s16
  suqadd s10, s16
  suqadd s11, s16
  suqadd s12, s16
  suqadd s13, s16
  suqadd s14, s16
  suqadd s15, s16
  movi v16.16b, 17

(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)
160204801101601071011600061001600103006400361601082001600122003200241160000100
160204800351601071011600061001600103006400361601082001600122003200241160000100
160204800351601051011600041001600083006400361601082001600122003200241160000100
160204800351601051011600041001600083006400361601082001600122003200281160000100
160204800351601051011600041001600083006400361601082001600122003200241160000100
160204800351601051011600041001600083006400361601082001600122003200241160000100
160204800351601051011600041001600083006400361601082001600122003200241160000100
160204800351601051011600041001600083006400361601082001600122003200241160000100
160204800351601051011600041001600083006400361601082001600122003200241160000100
160204800351601051011600041001600083006400361601082001600122003200241160000100

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)
160024801511600151116000410160008306400441600202016001420320122116000010
160024800361600171116000610160010306400001600102016000020320000116000010
160024800351600111116000010160000306400001600102016000020320000116000010
160024800351600111116000010160000306400001600102016000020320000116000010
160024800351600111116000010160000306400441600202016001420320024116000010
160024800351600111116000010160000306400001600102016000020320000116000010
160024800351600111116000010160000306400001600102016000020320000116000010
160024800351600111116000010160000306400001600102016000020320000116000010
160024800351600111116000010160000306400001600102016000020320000116000010
160024800351600111116000010160000306400001600102016000020320000116000010