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

SADDLV (vector, 4H)

Test 1: uops

Code:

  saddlv s0, 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)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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100430372306125472510001000100039816013018303730372414328951000100020003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816013018303730372414328951000100020003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816013018303730372414328951000100020003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816013018303730372414328951000100020003037303711100110000073116112629100030383038303830383038
100430372206125472510001000100039816013018303730372414328951000100020003037303711100110000073116112629100030383038303830383038
100430372206125472510001000100039816013018303730372414328951000100020003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816013018303730372414328951000100020003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816013018303730372414328951000100020003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816013018303730372414328951000100020003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816013018303730372414328951000100020003037303711100110000373116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  saddlv s0, 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)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)6061696d6emap 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)accfd0d2d5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102043003722506129547251010010010000100100005004277160053001830037300372826432874510100200100002002000030037300371110201100991001001000010000710511161129633100001003003830038300383003830038
102043003722506129547251010010010000100100005004277160053001830037300372826432874510100200100002002000030037300371110201100991001001000010000710001161129633100001003003830038300383003830038
102043003722506129547251010010010000100100005004277160003001830037300372826432874510100200100002002000030037300371110201100991001001000010000710001161129633100001003003830038300383003830038
102043003722506129547251010010010000100100005004277160003001830037300372826432874510100200100002002000030037300371110201100991001001000010000710511161129633100001003003830038300383003830038
102043003722506129547251010010010000100100005004277160003001830037300372826432874510100200100002002000030037300371110201100991001001000010010710001161129633100001003003830038300383003830038
1020430037225516129547991010010010000100100005004277160053001830037300372826482876310100200100002002000030037300371110201100991001001000010010710001161129633100001003003830038300383003830038
102043003722566129547251010010010000100100005004277160103001830037300372826432874510100200100002002000030037300371110201100991001001000010000710001161129633100001003003830038300383003830038
102043003722506129547251010010010000100100005004277160003001830037300372826432874510100200100002002000030037300372110201100991001001000010000710001161129633100001003003830038300383003830038
102043003722506129547251010010010000100100005004277160003001830037300372826432874510100200100002002000030037300371110201100991001001000010000710001161129633100001003003830038300383003830038
102043003722506129547251010010010000100100005004277160053001830037300372826432874510100200100002002000030037300371110201100991001001000010016710001161129633100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03mmu table walk data (08)l2 tlb miss data (0b)191e3f4e51schedule 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)9fld unit uop (a6)l1d cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
100243003722500006129547251001010100001010000504277160130018300373003728286328767100102010000202000030037300371110021109101010000100000640216222962910000103003830038300383003830038
10024300372240002761295472510010101000010100005042771601300183003730037282863287671001020100002020000300373003711100211091010100001000021640216222962910000103003830038300383003830038
100243003722500006129547251001010100001010000504277160130018300373003728286328767100102010000202000030037300371110021109101010000100000640216222962910000103003830038300383003830038
100243003722500006129547251001010100001010000504277160130018300373003728286328767100102010000202000030037300371110021109101010000100000640216222962910000103003830038300383003830038
100243003722500006129547251001010100001010000504277160130018300373003728286328767100102010000202000030037300371110021109101010000100000640216222962910000103003830038300383003830038
100243003722500006129547251001010100001010000504277160130018300373003728286328767100102010000202000030037300371110021109101010000100000640216232962910000103003830038300383003830038
100243003722500006129547251001010100001010000504277160130018300373003728286328767100102010000202000030037300371110021109101010000100020640216222962910000103003830038300383003830038
100243003722400006129547251001010100001010000504277160030018300373003728286328767100102010000202000030037300371110021109101010000100000640216222962910000103003830038300383003830038
100243003722500006129547251001010100001010000504277160130018300373003728286328767100102010000202000030037300371110021109101010000100000640216222962910000103003830038300383003830038
100243003722400006129547251001010100001010000504277160130018300373003728286328767100102010000202000030037300371110021109101010000100000663216222965310000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

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

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

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

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)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)acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042006015003025801081008000810080020500640132120020200392003999776999080120200800322001600642003920039118020110099100100800001000011151183161220036800001002004020040200402004020040
802042003915003025801081008000810080020500640132020020200392003999776999080120200800322001600642003920039118020110099100100800001000011151181161220036800001002004020040200402004020040
802042003915005525801081008000810080020500640132120020200392003999776999080120200800322001600642003920039118020110099100100800001000011151182162220036800001002004020040200402004020040
802042003915005325801081008000810080020500640132020020200392003999776999080120200800322001600642003920039118020110099100100800001000011151182162220036800001002004020040200402004020040
802042003915003025801081008000810080020500640132020020200392003999776999080120200800322001600642003920039118020110099100100800001000011151182162220036800001002004020040200402004020040
802042003915003025801081008000810080020500640132120020200392003999776999080120200800322001600642003920039118020110099100100800001000011151182162220036800001002004020040200402004020040
8020420039150022025801081008000810080020500640132020020200392003999776999080120200800322001600642003920039118020110099100100800001000011151182162220036800001002004020040200402004020040
802042003915003025801081008000810080020500640132120020200392003999776999080120200800322001600642003920039118020110099100100800001001011151182162220036800001002004020040200402004020040
802042003915033025801081008000810080020500640132020020200392003999776999080120200800322001600642003920039118020110099100100800001001011151182161220036800001002004020040200402004020040
802042003915003525801081008000810080020500640132020020200392003999776999080120200800322001600642003920039118020110099100100800001000011151182162120036800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03l2 tlb miss data (0b)191e3f51schedule 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)6061696d6emap 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)accfd0d2l1i cache miss demand (d3)d5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242005115000040258001010800001080000506400001020020200392003999963100198001020800002016000020039200391180021109101080000100050200001016622003680000102004020040200402004020040
80024200391500006125800101080096108000050640000102002020039200399996710019800102080000201600002009920099118002110910108000010105020000316262003680000102004020040200402004020040
80024200391500004025800101080000108000050640000102002020039200399996310019800102080000201600002003920039118002110910108000010105020000216262003680000102004020040200402004020040
80024200391500004025800101080000108000050640000102002020039200399996310019800102080000201600002003920039118002110910108000010005020000616662003680000102004020040200402004020040
80024200391500008225800101080000108000050640000102002020039200399996310019800102080000201600002003920039118002110910108000010005020000216622003680000102004020040200402009120040
80024200391500004025800101080000108000050640000102002020039200399996310019800102080000201600002003920039118002110910108000010005020000616222003680000102004020040200402004020087
80024200391500004025800101080000108000050640000102002020039200399996310019800102080000201600002003920039118002110910108000010005020000616622003680000102004020040200402004020040
80024200391500004025800101080000108000050640000102002020039200399996310019800102080000201600002003920039118002110910108000010005020000216622003680000102004020040200402004020040
80024200391501004025800101080000108000050640000102002020039200399996310019800102080000201600002003920039118002110910108000010005020000216222003680000102004020040200402004020040
80024200391500004025800101080000108000050640000102002020039200399996310019800102080000201600002003920039118002110910108000010005020000216222003680000102004020040200402004020040