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

URSRA (vector, 4H)

Test 1: uops

Code:

  ursra v0.4h, v1.4h, #3
  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 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)
10043033100111000100075905100010000020001010000
10043033100111000100075905100010000020001010000
10043033100111000100075905100010000020001010000
10043033100111000100075905100010000020001010000
10043033100111000100075905100010000020001010000
10043033100111000100075905100010000020001010000
10043033100111000100075905100010000020001010000
10043033100111000100075905100010000020001010000
10043033100111000100075905100010000020001010000
10043033100111000100075905100010000020001010000

Test 2: Latency 1->1

Code:

  ursra v0.4h, v1.4h, #3
  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)
1020430033101011011000010010000300768905101002001000620020008110000100
1020430033101011011000010010000300768905101002001000420020008110000100
1020430033101011011000010010000300768905101002001000420020008110000100
1020430033101011011000010010000300768905101002001000420020008110000100
1020430033101011011000010010000300768905101002001000420020008110000100
1020430033101011011000010010000300768905101002001000420020008110000100
1020430033101011011000010010000300768905101002001000420020008110000100
1020430033101011011000010010000300768905101002001000420020008110000100
1020430033101011011000010010000300768905101002001000420020008110000100
1020530066101071011000610010031300768905101002001000420020088110000100

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)
10024300331002121100002010000067076924710051200100462020000111000010
10024300331002121100002010000070076890510020200100002020000111000010
10024300331002121100002010000070076890510020200100002020000111000010
10024300331002121100002010000070076890510020200100002020000111000010
10024300331002121100002010000070076890510020200100002020000111000010
10024300331002121100002010000070076890510020200100002020000111000010
10024300331002121100002010000070076890510020200100002020000111000010
10024300331002121100002010000070076890510020200100002020000111000010
10024300331002121100002010000070076890510020200100002020000111000010
10024300331002121100002010000070076890510020200100002020000111000010

Test 3: Latency 1->2

Code:

  ursra v0.4h, v0.4h, #3
  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
1020430033101011011000010010000300768905101002001000420020008110000100
1020530066101071011000610010031300768905101002001000420020008110000100
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)
10024300331002121100002010000707689051002020100002020000111000010
10024300331002121100002010000707689051002020100002020000111000010
10024300331002121100002010000707689051002020100002020000111000010
10024300331002121100002010000707689051002020100002020000111000010
10024300331002121100002010000707689051002020100002020000111000010
10024300331002121100002010000707689051002020100002020000111000010
10024300331002121100002010000687692471005120100482020000111000010
10024300331002121100002010000707689051002020100002020000111000010
10024300331002121100002010000707689051002020100002020000111000010
10024300331002121100002010000707689051002020100002020096111000010

Test 4: throughput

Count: 8

Code:

  movi v0.16b, 0
  ursra v0.4h, v8.4h, #3
  movi v1.16b, 0
  ursra v1.4h, v8.4h, #3
  movi v2.16b, 0
  ursra v2.4h, v8.4h, #3
  movi v3.16b, 0
  ursra v3.4h, v8.4h, #3
  movi v4.16b, 0
  ursra v4.4h, v8.4h, #3
  movi v5.16b, 0
  ursra v5.4h, v8.4h, #3
  movi v6.16b, 0
  ursra v6.4h, v8.4h, #3
  movi v7.16b, 0
  ursra v7.4h, v8.4h, #3
  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)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)
1602044054680109101800081008001230032005280112200800122001600241160000100
1602044011980109101800081008001230032005280112200800122001600261160000100
1602044010180110101800091008001330032005280112200800122001600241160000100
1602044008680109101800081008001230032005280112200800122001600241160000100
1602044008680109101800081008001230032005280112200800122001600241160000100
1602044008680109101800081008001230032005280112200800122001600241160000100
1602044008680109101800081008001230032020080149200800492001600261160000100
1602044008680109101800081008001230032005280112200800122001600241160000100
1602044008680109101800081008001230032005280112200800122001600241160000100
1602044008680109101800081008001230032005280112200800122001600241160000100

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)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)
1600244380880020118000910800130300320000800102008000020160000116000010
1600244125180011118000010800000300320000800102008000020160000116000010
1600244043480011118000010800000300320000800102008000020160000116000010
1600244043080011118000010800000300320000800102008000020160000116000010
1600244039980011118000010800000300320000800102008000020160000116000010
1600244044480011118000010800000300320000800102008000020160000116000010
1600244041480011118000010800000300320000800102008000020160000116000010
1600244168980011118000010800001559962841976024238263067313619025918820160000116000010
1600244052180011118000010800000300320000800102008000020160000116000010
1600244044280011118000010800000300320000800102008000020160000116000010

Test 5: throughput

Count: 16

Code:

  ursra v0.4h, v16.4h, #3
  ursra v1.4h, v16.4h, #3
  ursra v2.4h, v16.4h, #3
  ursra v3.4h, v16.4h, #3
  ursra v4.4h, v16.4h, #3
  ursra v5.4h, v16.4h, #3
  ursra v6.4h, v16.4h, #3
  ursra v7.4h, v16.4h, #3
  ursra v8.4h, v16.4h, #3
  ursra v9.4h, v16.4h, #3
  ursra v10.4h, v16.4h, #3
  ursra v11.4h, v16.4h, #3
  ursra v12.4h, v16.4h, #3
  ursra v13.4h, v16.4h, #3
  ursra v14.4h, v16.4h, #3
  ursra v15.4h, v16.4h, #3
  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)
160204800761601051011600041001600083006400361601082001600122003200281160000100
160204800351601071011600061001600103006400361601082001600122003200241160000100
160204800351601051011600041001600083006400361601082001600122003200241160000100
160204800351601051011600041001600083006400361601082001600122003200241160000100
160204800351601051011600041001600083006400361601082001600122003200241160000100
160204800351601051011600041001600083006400361601082001600122003200241160000100
160204800351601051011600041001600083006400361601082001600122003200281160000100
160204800351601071011600061001600103006400441601102001600142003200241160000100
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)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)
1600248015116001711160006010160010306400001600102016000020320000116000010
1600248003516001111160000010160000306400001600102016000020320000116000010
1600248003516001111160000010160000306400361600182016001220320000116000010
1600248003516001111160000010160000306400001600102016000020320000116000010
1600248005316001111160000010160000306400001600102016000020320000116000010
1600248003516001111160000010160000306400001600102016000020320000116000010
1600248003516001111160000010160000306400001600102016000020320000116000010
1600248003516001111160000010160000306400001600102016000020320000116000010
1600248003516001111160000010160000306402081600642016006420320000116000010
1600248003516001111160000010160000306400001600102016000020320000116000010