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

ADDV (4S)

Test 1: uops

Code:

  addv s0, 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: 0.000

Load/store unit issues: 0.000

SIMD/FP unit issues: 1.000

retire uop (01)cycle (02)031e3f4e51schedule uop (52)schedule simd uop (54)dispatch simd uop (57)ldst uops in schedulers (5b)60696d6emap 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
10043037220612547251000100010003981601301830373037241432895100010002000303730371110011000073116112629100030383038303830383038
100430372307882547251000100010003981601301830373037241432895100010002000303730371110011000073116112629100030383038303830383038
10043037220612547251000100010003981601301830373037241432895100010002000303730371110011000073116112629100030383038303830383038
10043037230612547251000100010003981601301830373037241432895100010002000303730371110011000073116112629100030383038303830383038
100430372312612547251000100010003981601301830373037241432895100010002000303730371110011000073116112629100030383038303830383038
10043037220612547251000100010003981601301830373037241432895100010002000303730371110011000073116112629100030383038303830383038
10043037233612547251000100010003981601301830373037241432895100010002000303730371110011000073116112629100030383038303830383038
10043037230612547251000100010003981601301830373037241432895100010002000303730371110011000073116112629100030383038303830383038
10043037223612547251000100010003981601301830373037241432895100010002000303730371110011000073116112629100030383038303830383038
10043037239612547251000100010003981601301830373037241432895100010002000303730371110011000073116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  addv s0, 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): 3.0037

retire uop (01)cycle (02)03mmu table walk data (08)191e1f3a3f4e51schedule 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)60696b6d6emap 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)ld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)a9acc2cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020430037225000002292954725101001001000010010000500427716013001803003730037282643287451010020010000200200003003730037111020110099100100100001000000000071011611296330100001003003830038300383003830038
10204300372250036001282952925101001001000010010000500427716013001803003730037282643287451010020010000200200003003730037111020110099100100100001000000000071011611296330100001003003830038300383003830038
102043003722500000612954725101001001000010010000500427716013001803003730037282643287451010020010000200200003003730037111020110099100100100001000000000071011611296330100001003003830038300383003830038
102043003722400000612954725101001001000010010000500427716013001803003730037282643287451010020010000200200003003730037111020110099100100100001000000000071011611296330100001003003830038300383003830038
102043003722500000612954725101001001000010010000500427716013001803003730037282643287451010020010000200200003003730037111020110099100100100001000000000071011611296330100001003003830038300383003830038
102043003722500000612954725101001001000010010000500427716013001803003730037282643287451010020010000200200003003730037111020110099100100100001000000000071011611296330100001003003830038300383003830038
102043003722400000612954725101001001000010010000500427716013001803003730037282643287451010020010000200200003003730037111020110099100100100001000000000071011611296330100001003003830038300383003830038
102043003722500000612954725101001001000010010000500427716013001803003730037282643287451010020010000200200003003730037111020110099100100100001000000000071011611296330100001003003830038300383003830038
102043003722500000612954725101001001000010010000500427716013001803003730037282643287451010020010000200200003003730037111020110099100100100001000000000071011611296330100001003003830038300383003830038
102043003722500000612954725101001001000010010000500427716013006603003730037282643287451010020010000200200003003730037111020110099100100100001000000000071011611296330100001003003830038300383003830038

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)9fl1d cache writeback (a8)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
100243003722406129547251001010100001010000504277160300180300373003728286328767100102010000202000030037300371110021109101010000100640316222962910000103003830038300383003830038
100243003722506129547251001010100001010000554277160300180300373003728286328767100102010000202000030037300371110021109101010000100640216222962910000103003830038300383003830038
100243003722506129547251001010100001010000504277160300180300373003728286328767100102010000202000030037300371110021109101010000100640216222962910000103003830038300383003830038
100243003722506129547251001010100001010000504277160300180300373003728286328767100102010000202000030037300371110021109101010000100640216222962910000103003830038300383003830038
100243003722506129547251001010100001010000504277160300180300373003728286328767100102010000202000030037300371110021109101010000100640216222962910000103003830038300383003830038
100243003722506129547251001010100001010000504277160300180300373003728286328767100102010000202000030037300371110021109101010000100640216222962910000103003830038300383003830038
100243003722506129547251001010100001010000504277160300180300373003728286328767100102010000202000030037300371110021109101010000100640216222962910000103003830038300383003830038
100243003722506129547251001010100001010000504277160300180300373003728286328767100102010000202000030037300371110021109101010000100640216222962910000103003830038300383003830038
100243003722506129547251001010100001010000504277160300180300373003728286328767100102010000202000030037300371110021109101010000100640216222962910000103003830038300383003830038
100243008422506129547251001010100001010000504277160300180300373003728286328767100102010000202000030037300371110021109101010000100640216222962910000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  addv s0, v8.4s
  addv s1, v8.4s
  addv s2, v8.4s
  addv s3, v8.4s
  addv s4, v8.4s
  addv s5, v8.4s
  addv s6, v8.4s
  addv s7, v8.4s
  movi v8.16b, 9

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

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

retire uop (01)cycle (02)031e3f51schedule 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)696d6emap 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)branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)fetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420058150633025801081008000810080020500640132200202003920039997769990801202008003220016006420039200391180201100991001008000010001115118016020036800001002004020040200402004020040
802042003915003025801081008000810080020500640132200202003920039997769990801202008003220016006420039200391180201100991001008000010001115118016020036800001002004020040200402004020040
80204200391504653025801081008000810080020500640132200202003920039997769990801202008003220016006420039200391180201100991001008000010001115118016020036800001002004020040200402004020040
8020420039150060025801081008000810080020500640132200202003920039997769990801202008003220016006420039200391180201100991001008000010001115118016020036800001002004020040200402004020040
802042003915003025801081008000810080020500640132200202003920039997769990801202008003220016006420039200391180201100991001008000010001115118016020036800001002004020040200402004020040
802042003915003025801081008000810080020500640132200202003920039997769990801202008003220016006420039200391180201100991001008000010001115118016020036800001002004020040200402004020040
8020420039150665125801081008000810080020500640132200202003920039997769990801202008003220016006420039200391180201100991001008000010001115118016020036800001002004020040200402004020040
802042003915003025801081008000810080020500640132200202003920039997769990801202008003220016006420039200391180201100991001008000010001115118016020036800001002004020040200402004020040
8020420039150213025801081008000810080020500640132200202003920039997769990801202008003220016006420039200391180201100991001008000010001115118016020036800001002004020040200402004020040
802042003915003025801081008000810080020500640132200202003920039997769990801202008003220016006420039200391180201100991001008000010001115118016020036800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)031e3f51schedule 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)5f60696d6emap 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 access (a0)l1d tlb miss (a1)l1d cache writeback (a8)c2cfd0d2l1i cache miss demand (d3)d5map dispatch bubble (d6)d9dadbddfetch restart (de)e0eaeb? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200391500402580010108000010800005064000001200202003920039999631001980010208000020160000200392003911800211091010800001000005020000121600022200360080000102004020040200402004020040
80024200391492740258001010800001080000506400000120020200392003999963100198001020800002016000020039200391180021109101080000100000502000021600022200360080000102004020040200402004020040
800242003915027705258001010800001080000506400001120020200392003999963100198001020800002016000020039200391180021109101080000100000502000021600062200360080000102004020040200402004020040
80024200391504540258001010800001080000506400000120020200392003999963100198001020800002016000020039200391180021109101080000100000502000021600026200360080000102004020040200402004020040
8002420039150040258001010800001080000506400000120020200392003999963100198001020800002016000020039200391180021109101080000100000502000061600022200360080000102004020040200402004020040
80024200391504540258001010800001080000506400000120020200392003999963100198001020800002016000020039200391180021109101080000100000502000021600022200360080000102004020040200402004020040
80024200391502140258001010800001080000506400000120020200392003999963100198001020800002016000020039200391180021109101080000100000502000061600062200360680000102004020040200402004020040
8002420039150040258001010800001080000506400000120020200392003999963100198001020800002016000020039200391180021109101080000100000502000021600122200360080000102004020040200402004020040
80024200391503940258001010800001080000506400000120020200392003999963100198001020800002016000020039200391180021109101080000100000502001021600022200860080000102004020040200402004020040
8002420039149040258001010800001080000506400000120020200392003999963100198001020800002016000020039200391180021109101080000100010502000021600026200360080000102004020040200402004020040