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

ABS (vector, 4H)

Test 1: uops

Code:

  abs v0.4h, v0.4h
  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: 0.000

Load/store unit issues: 0.000

SIMD/FP unit issues: 1.000

retire uop (01)cycle (02)03mmu table walk instruction (07)l2 tlb miss instruction (0a)3a3f4e51schedule uop (52)schedule simd uop (54)dispatch simd uop (57)ldst uops in schedulers (5b)696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map simd uop (7e)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst simd alu (9a)l1d cache writeback (a8)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100430372211268254725100010001000398160301830373037241432895100010001000303730371110011000077416442629100030383038303830383038
100430372311268254725100010001000398160301830373037241432895100010001000303730371110011000077416442629100030383038303830383038
100430372211268254725100010001000398160301830373037241432895100010001000303730371110011000077416442629100030383038303830383038
1004303723112182254725100010001000398160301830373037241432895100010001000303730371110011000077416442629100030383038303830383038
100430372311268254725100010001000398160301830373037241432895100010001000303730371110011000077416442629100030383038303830383038
100430372211268254725100010001000398160301830373037241432895100010001000303730371110011000077416442629100030383038303830383038
1004303722112110254725100010001000398160301830373037241432895100010001000303730371110011000177416442629100030383038303830383038
100430372211268254725100010001000398160301830373037241432895100010001000303730371110011000077416442629100030383038303830383038
100430372311268254725100010001000398160301830373037241432895100010001000303730371110011000077416442629100030383038303830383038
100430372311268254725100010001000398160301830373037241432895100010001000303730371110011000077416442629100030383038303830383038

Test 2: Latency 1->2

Code:

  abs v0.4h, v0.4h
  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03l2 tlb miss data (0b)1e3f4e51schedule 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)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd alu (9a)9fl1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204300372250081429547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
1020430037225006129547251010010010000100100005004277160130018300373003728264328745101002001000020410000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
1020430037225006129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
1020430037225006129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
1020430037224006129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
1020430037225006129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
1020430037225006129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373008311102011009910010010000100007101161129633100001003003830038300383003830038
1020430037225006129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
1020430037225006129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
1020430037225006129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)031e3f4e51schedule 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)696b6d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd alu (9a)9fld unit uop (a6)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
100243003722501762954725100101010000101000050427716030018030037300372828632876710010201000020100003003730037111002110910101000010000640216222962910000103003830038300383003830038
100243003722501662954725100101010000101000050427716030018030037300372828632876710010201000020100003003730037111002110910101000010000640216222962910000103003830038300383003830038
10024300372250612954725100101010000101000050427716030018030037300372828632876710010201000020100003003730037111002110910101000010000640216222962910000103003830038300383003830038
100243003722502312954725100101010000101000050427716030018030037300372828632876710010201000020100003003730037111002110910101000010000640216222962910000103003830038300383003830038
100243003722501262954725100101010000101000050427716030018030037300372828632876710010201000020100003003730037111002110910101000010000640216222962910000103003830038300383003830038
10024300372250612954725100101010000101000050427716030018030037300372828632876710010201000020100003003730037111002110910101000010000640216222962910000103003830038300383003830038
100243003722501032954725100101010000101000050427716030018030037300372828632876710010201000020100003003730037111002110910101000010000640216222962910000103003830038300383003830038
10024300372250612954725100101010000101000050427716030018030037300372828632876710010201000020100003003730037111002110910101000010000640216222962910000103003830038300383003830038
10024300372250822954725100101010000101000050427716030018030037300372828632876710010201000020100003003730037111002110910101000010000640216222967510000103003830038300383003830038
10024300372250842954725100101010000101000050427716030018030037300372828632876710010201000020100003003730037111002110910101000010000640216222962910000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

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

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.2506

retire uop (01)cycle (02)0318191e3f51schedule 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)60696d6emap stall dispatch (70)simd prf full (72)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd alu (9a)9fl1d tlb miss (a1)l1d cache writeback (a8)branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042005915000015625801081008000810080020500640132120020200392003999770699908012020080032200800322003920039118020110099100100800001000011151180164020036800001002004020040200402004020040
80204200391500003025801081008000810080020500640132020020200392003999770699908012020080032200800322003920039118020110099100100800001000011151180162020036800001002004020040200402004020040
80204200391500003025801081008000810080020500640132020020200392003999770699908012020080032200800322003920039118020110099100100800001000011151180163020036800001002004020040200402004020040
80204200391500003025801081008000810080020500640132020020200392003999770699908012020080032200800322003920039118020110099100100800001000011151180164020036800001002004020040200402004020040
80204200391500003025801081008000810080020500640132020020200392003999770699908012020080032200800322003920039118020110099100100800001000011151180161520036800001002004020040200402004020040
802042003915000030258010810080008100800205006401960200292004820049997601099868012820080038200800382004820049118020110099100100800001000022251281234220045800001002004920049200502015320049
802042004915000037226801161008008410080028500640196120029200482004899760999868012820080038200800382004820049118020110099100100800001000022251281234120045800001002004920049200492004920049
8020420048150000108526801161008001610080028500640196120029200482004899760999868012820080038200800382004920048118020110099100100800001000022251281232120046800001002004920050200502005020049
8020420048150000729268011610080016100800285006401960200292004820048997601099868012820080038200800382004820048118020110099100100800001000022251291232120127800001002004920049200492004920050
802042004915000276426801161008001610080028500640196020029200482004999760999868012820080038200800382004820048118020110099100100800001000022251291234220045800001002005020050200502005020049

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.2505

retire uop (01)cycle (02)03mmu table walk data (08)1e1f3f51schedule 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)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd alu (9a)9fl1d tlb miss (a1)l1d cache writeback (a8)acc2cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242003915000082258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010000005020316212003680000102004020040200402004020040
800242003915000040258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010000005020116112003680000102004020040200402004020040
800242003915000040258001010800001080000506400000200202003920039999631001980010208000020800992011220039118002110910108000010000005020116112003680000102004020040200402004020040
800242003915000040258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010000005020116112003680000102004020040200402004020040
800242003915000040258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010000005020116322003680000102004020040200402004020040
800242003915000040258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010000005020216112003680000102004020040200402004020040
800242003915000040258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010000005020116112003680000102004020040200402004020040
800242003915000040258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010000005020116222003680000102004020040200402004020040
800242003915000040258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010000005020116112003680000102004020040200402004020040
800242003915000040258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010000005020217112003680000102004020040200402004020040