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 (8B)

Test 1: uops

Code:

  addv b0, v0.8b
  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)031e1f3f4e51schedule 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100430372300612547251000100010003981603018303730372414328951000100020003037303711100110000073216222629100030383038303830383038
100430372230612547251000100010003981603018303730372414328951000100020003037303711100110000073216222629100030383038308630383038
100430372200612547251000100010003981603018303730372414328951000100020003037303711100110000073216222629100030383038303830383038
100430372200612547251000100010003981603018303730372414328951000100020003037303711100110000073216222629100030383038303830383038
100430372200612547251000100010003981603018303730372414328951000100020003037303711100110000073216222629100030383038303830383038
10043037231410612547251000100010003981603018303730372414328951000100020003037303711100110000073216222629100030383038303830383038
100430372200612547251000100010003981603018303730372414328951000100020003037303711100110000073216222629100030383038303830383038
100430372230612547251000100010003981603018303730372414328951000100020003037303711100110000073216222629100030383038303830383038
1004303723150612547251000100010003981603018303730372414328951000100020003037303711100110000073216222629100030383038303830383038
100430372200612547251000100010003981603018303730372414328951000100020003037303711100110000073216222629100030383038303830383038

Test 2: Latency 1->2

Code:

  addv b0, v0.8b
  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)181e1f3f4e51schedule 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 access (a0)l1d cache writeback (a8)acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020430037225000061295474510100100100001001000050042771600300183003730037282643287451027220210168200200003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
1020430037225005370726295472510100100100001001000050042771601300183003730037282643287451010020010000200200003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
1020430037225005100251295472510100100100001001000050042771601300183003730037282643287451010020010000200200003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
102043003722500513061295472510100100100001001000050042771601300183003730037282643287451010020010000200200003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
1020430037225000061295472510100100100001001000050042771601300183003730037282643287451010020010000200200003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
1020430037225000061295472510100100100001001000050042771600300183008430037282643287451010020010000200200003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
10204300372250000103295474410100100100001001000050042771600300183003730037282643287451010020010000200200003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
1020430037225000061295472510100100100001001000050042771600300183003730037282643287451010020010000200200003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
1020430037225000061295472510100100100001001000050042771600300183003730037282643287451010020010000200200003003730037111020110099100100100001000001071011611296330100001003003830038300383003830038
1020430037225000061295472510100100100001001000050042771601300183003730037282643287451010020010000200200003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03mmu table walk data (08)18191e1f3f4e51schedule 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)9facc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
100243003722500000612954725100101010000101000050427716013001830037300372828632876710010201000020200003003730037111002110910101000010006402162229629010000103003830038300383003830038
10024300372250005250612954725100101010000101000050427716003001830037300372828632876710010201000020200003003730037211002110910101000010006402162229629010000103003830038300383003830038
10024300372250002370612954725100101010000101000050427716013001830037300372828632876710010201000020200003003730037111002110910101000010006402162229629010000103003830038300383003830038
100243003722500000612954725100101010000101000050427716003001830037300372828632876710010201000020200003003730037111002110910101000010006402162229629010000103003830038300383003830038
100243003722500000612954725100101010000101000050427716003001830037300372828632876710010201000020200003003730037111002110910101000010006402162229629010000103003830038300383003830038
100243003722500000612954725100101010000101000050427716003001830037300372828632876710010201000020200003003730037111002110910101000010006402162229629010000103003830038300383003830038
100243003722500000612954725100101010000101000050427716003001830037300372828632876710010201000020200003003730037111002110910101000010006402162229629010000103003830038300383003830038
100243003722500000612954725100101010000101000050427716003001830037300372828632876710010201000020200003003730037111002110910101000010006402162229629010000103003830038300383003830038
10024300372250008490612954725100101010000101000050427716003001830037300372828632876710010201000020200003003730037111002110910101000010006402162229629010000103003830038300383003830038
100243003722500000612954725100101010000101000050427716003001830037300372828632876710010201000020200003003730037111002110910101000010006402162229629010000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  addv b0, v8.8b
  addv b1, v8.8b
  addv b2, v8.8b
  addv b3, v8.8b
  addv b4, v8.8b
  addv b5, v8.8b
  addv b6, v8.8b
  addv b7, v8.8b
  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)03mmu table walk instruction (07)181e3a3f51schedule 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 cache writeback (a8)acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200601500000302580108100800081008002050064013202002002003920039997769990801202008003220016006420039200391180201100991001008000010000111511811600200360800001002009220040200402004020040
80204200391500000302580108100800081008002050064013202002002003920039997769990801202008003220016006420039200391180201100991001008000010000111511801600200360800001002004020040200402004020040
80204200391500000952580108100800081008002050064013202002002003920039997769990801202008003220016006420039200391180201100991001008000010000111511801600200860800001002004020040200402004020040
80204200391500000302580108100800081008002050064013202002002003920039997769990801202008003220016006420039200391180201100991001008000010000111511801600200360800001002004020040200402004020040
80204200391500000302580108100800081008002050064013202002002003920039997769990801202008003220016006420039200391180201100991001008000010000111511801600200360800001002004020040200402004020040
80204200391500000302580108100800081008002050064013202002002003920039997769990801202008003220016006420039200391180201100991001008000010000111511801600200360800001002004020040200402004020040
80204200391500000302580108100800081008002050064013212002002003920039997769990801202008003220016006420039200391180201100991001008000010000111511801600200360800001002004020040200402004020040
8020420039150000030258010810080008100800205006401321200200200392003999776999080120200800322001600642003920039118020110099100100800001000536111511801600200360800001002004020040200402004020040
80204200391500000302580108100800081008002050064013212002002003920039997769990801202008003220016006420039200391180201100991001008000010000111511801600200360800001002004020040200402004020040
8020420039150003690302580108100800081008002050064013212002002003920039997769990801202008003220016006420039200391180201100991001008000010000111511801600200360800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03181e3f51schedule 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)9fld unit uop (a6)l1d cache writeback (a8)accfl1i cache miss demand (d3)d5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242004015000402580010108000010800005064000001200202003920039999631001980010208000020160000200392003911800211091010800001000050200416442003680000102004020040200402004020040
80024200391500361292580010108000010800005064000001200202003920039999631001980010208000020160000200392003911800211091010800001000050200416422003680000102004020040200402004020040
800242003915000402580010108000010800005064000001200202003920039999631001980010208000020160000200392003911800211091010800001000050200416422003680000102004020040200402004020040
800242003915006402580010108009710800005064000001200202003920039999631001980010208000020160000200392003911800211091010800001000050200216242003680000102004020040200402004020040
800242003915000402580010108000010800005064075601200202003920039999631001980010208000020160000200392003911800211091010800001000050200216422003680000102004020040200402004020040
800242003915000402580010108000010800005064000001200202003920039999631001980010208000020160000200392003911800211091010800001000050200416422003680000102004020040200402004020040
800242003915000402580010108000010800005064000001200202003920039999631001980010208000020160000200392003911800211091010800001000050200216442003680000102004020040200402004020040
8002420039150004392580010108000010800005064000001200202003920039999631001980010208000020160000200392003911800211091010800001000050200216442003680000102004020040200402004020040
80024200391500040258001010800001080000506400000120020200392003999963100198001020800002016000020039200391180021109101080000100052550200416442003680000102004020040200402004020040
800242003915000402580010108000010800005064000001200202003920039999631001980010208000020160000200392003911800211091010800001000050200216422003680000102004020040200402004020040