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

URECPE (vector, 4S)

Test 1: uops

Code:

  urecpe v0.4s, v0.4s
  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)schedule ldst uop (55)dispatch int uop (56)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)
100440331001110000010005060810001000100011000
100440331001110000010005060810001000100011000
100440331001110000010005060810001000100011000
100440331001110000010005060810001000100011000
100440331001110000010005060810001000100011000
100440331001110000010005060810001000100011000
100440331001110000010005060810001000100011000
100440331001110000010005060810001000100011000
100440331001110000010005060810001000100011000
100440331001110000010005060810001000100011000

Test 2: Latency 1->2

Code:

  urecpe v0.4s, 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): 4.0033

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)
1020440033101011011000010010000300509608101002001000620010004110000100
1020440033101011011000010010000300509608101002001000420010004110000100
1020440033101011011000010010000300509608101002001000620010004110000100
1020440033101011011000010010000300509608101002001000420010004110000100
1020440033101011011000010010000300509608101002001000420010004110000100
1020440033101011011000010010000300509608101002001000420010004110000100
1020440033101011011000010010000300509608101002001000420010004110000100
1020440033101011011000010010000300509608101002001000420010004110000100
1020440033101011011000010010000300509608101002001000420010004110000100
1020440033101011011000010010000300509608101002001000420010004110000100

1000 unrolls and 10 iterations

Result (median cycles for code): 4.0033

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)
10024400331002121100002010000705096081002020100002010000111000010
10024400331002121100002010000705096081002020100002010000111000010
10024400331002121100002010000705096081002020100002010000111000010
10024400331002121100002010000705096081002020100002010000111000010
10024400331002121100002010000705096081002020100042010000111000010
10024400331002121100002010000705096081002020100002010000111000010
10024400331002121100002010000705096081002020100002010000111000010
10024400331002121100002010000705096081002020100002010000111000010
10024400331002121100002010000705096081002020100002010000111000010
10024400331002121100002010000705096081002020100002010000111000010

Test 3: throughput

Count: 8

Code:

  urecpe v0.4s, v8.4s
  urecpe v1.4s, v8.4s
  urecpe v2.4s, v8.4s
  urecpe v3.4s, v8.4s
  urecpe v4.4s, v8.4s
  urecpe v5.4s, v8.4s
  urecpe v6.4s, v8.4s
  urecpe v7.4s, v8.4s
  movi v8.16b, 9

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 2.0004

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 ldst uop inputs (80)map simd uop inputs (81)? int output thing (e9)? ldst retires (ed)? simd retires (ee)? int retires (ef)
80204160035801011018000010080000030001999769801002000800042000800041080000100
80204160035801011018000010080000030001999769801002000800042000800041080000100
80204160035801011018000010080000030001999769801002000800042000800041080000100
80204160035801011018000010080000030001999769801002000800042000800041080000100
80204160035801011018000010080000030001999769801002000800042000800041080000100
80204160035801011018000010080000030001999769801002000800042000800361080000100
80204160035801011018000010080000030001999769801002000800042000800041080000100
80204160035801011018000010080000030001999769801002000800042000800041080000100
80204160035801011018000010080000030001999769801002000800042000800041080000100
80205160070801121038000910280022030001999769801002000800042000800041080000100

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 2.0004

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)
8002416003580021218000020800000680199993280042200800362080000118000010
8002416003580021218000020800000700199976980020200800002080000118000010
8002416003580021218000020800000700199976980020200800002080000118000010
8002516007080030218000920800220700199976980020200800002080000118000010
8002516007080030218000920800220700199976980020200800002080000118000010
80025160070800302180009208002279925514109732000072820651829915800602080000118000010
8002416003580021218000020800000700199976980020200800002080000118000010
8002416003580021218000020800000700199976980020200800002080000118000010
8002416003580021218000020800000700199976980020200800002080000118000010
8002516007080030218000920800220700199976980020200800002080000118000010