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

URSRA (vector, 4H)

Test 1: uops

Code:

  ursra v0.4h, v1.4h, #3
  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)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
10043037230612548251000100010003983131301830373037241532895100010002000303730371110011000143073216112783100030383038303830383038
1004303723061254825100010001000398313130183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
1004303722061254825100010001000398313130183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
1004303722061254825100010001000398313130183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
1004303723061254825100010001000398313130183037303724153289510001000200030373037111001100010073116112630100030383038303830383038
10043037230103254825100010001000398313130183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
1004303723061254825100010001000398313130183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
10043037230612548251000100010003983131301830373037241532895100010002000303730371110011000015073116112630100030383038303830383038
1004303722061254825100010001000398313130183037303724153289510001000200030373037111001100000073116112630100030383038303830383038
1004303723061254825100010001000398313130183037303724153289510001000200030373037111001100000073116112630100030383038303830383038

Test 2: Latency 1->1

Code:

  ursra v0.4h, v1.4h, #3
  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)l2 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)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 tlb access (a0)l1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
102043003722500047002954810410100100100001001000050042773133001830037300372826532874510100200100002002000030037300371110201100991001001000010000010071011611296340100001003003830038300383003830038
102043003722500061295482510100100100001001000050042773133001830037300372826532874510100200100002002000030037300371110201100991001001000010000000075411610296340100001003003830038300383003830038
102043003722500061295482510100100100001001000050042773133001830037300372826532874510100200100002002000030037300371110201100991001001000010000000071011611296340100001003003830038300383003830038
1020430037225000232295482510100100100001001000050042773133001830037300372826532874510100200100002002000030037300371110201100991001001000010000000071011611296340100001003003830038300383003830038
102043003722500061295482510100100100001001000050042773133001830037300372826532874510100200100002002000030037300371110201100991001001000010000000071011611296340100001003003830038300383003830038
102043003722500061295302510100100100001001000050042773133001830037300372826532874510100200100002002000030037300371110201100991001001000010000010071011611296340100001003003830038300383003830038
102043003722400061295482510100100100001001000050042773133001830037300372826532874510100200100002002000030037300371110201100991001001000010000001071011611296340100001003003830038300383003830038
102043003722500061295482510100100100001001000050042773133001830037300372826532874510100200100002002000030037300371110201100991001001000010000010071012511296340100001003003830038300383003830038
102043003722400061295482510100100100001001000050042773133001830037300372826532874510100200100002002000030037300371110201100991001001000010000000071011611296340100001003003830038300383003830038
102043003722500061295482510100100100001001000050042773133001830037300372826532874510100200100002002000030037300371110201100991001001000010000000071011611296340100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)0318191e1f3f4e51schedule 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 tlb miss (a1)ld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0eb? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024300372240000251295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
1002430037225000061295482510010101000010100005042773131300183003730037282873287671001020100002020000300373003711100211091010100001000003006402162229630010000103003830038300383003830038
1002430037225000061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
1002430037224000061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
10024300372250000612954810210010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
10024300372240000726295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
1002430037225009061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000004006402162229630010000103003830038300383003830038
1002430037225000061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
10024300372250000726295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
100243003722500004412954865100101010000101000050427731303001830037300372828732876710010201000020200003003730037111002110910101000010000029036402162229630010000103003830038300383003830038

Test 3: Latency 1->2

Code:

  ursra v0.4h, v0.4h, #3
  movi v0.16b, 1

(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)l2 tlb miss data (0b)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)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 access (a0)l1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)a9acc2branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020430037225000000612954725101001001000010010000500427716003001803003730037282716287401010020010008200200163003730037111020110099100100100001000000030111718016296450100001003003830038300383003830038
102043003722500001201032954725101001001000010010000500427716003001803003730037282717287411010020010008200200163003730037111020110099100100100001000001000111717016296460100001003003830038300383003830038
1020430037225000000612954725101001001000010010000500427716013001803003730037282717287401010020010008200200163003730037111020110099100100100001000000000111717016296450100001003003830038300383003830038
1020430037225000000612954725101001001000010010000500427716013001803003730037282716287411010020010008200200163003730037111020110099100100100001000000000111718016296450100001003003830038300383003830038
1020430037225000000612954725101001001000010010000500427716003001803003730037282717287411010020010008200200163003730037111020110099100100100001000000000111718016297160100001003003830038300383003830038
10204300372250000002032954725101001001000010010000500427716013001803003730037282717287411010020010008200200163003730037111020110099100100100001000000000111718016296460100001003003830038300383003830038
10204300372250000006129547251010010010000100101505004277160030018030037300372827112287941010020010008200200163003730037111020110099100100100001000000000111741016296460100001003003830038300383003830038
10204300372250000120612953825101001001000010010150500427716013001803003730037282717287411010020010008200200163003730084111020110099100100100001000000000111717016296450100001003003830038300383003830038
1020430037225000000822954725101001001000010010000500427716003001803003730037282716287411010020010008200200163003730037111020110099100100100001000000000111718016296460100001003003830038300383003830038
10204300372250000601032954725101001001000010010000500427716003001803003730037282717287411010020010008200200163003730037111020110099100100100001000000000111717016296460100001003003830038300383003830038

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)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
1002430037225061295472510010101000010100005042771600300183003730037282863287671001020100002020000300373003711100211091010100001000640416342962910000103003830038300383003830038
1002430037225061295472510010101000010100005042771600300183003730037282863287671001020100002020000300373003711100211091010100001000640316342962910000103003830038300383003830038
100243003722501114295472510010101000010100005042771600300183003730037282863287671001020100002020000300373003711100211091010100001000640416432962910000103003830038300383003830038
1002430037225061295472510010101000010100005042771600300183003730037282863287671001020100002020000300373003711100211091010100001040640416342962910000103003830038300383003830038
1002430037225061295472510010101000010100005042771600300183003730037282863287671001020100002020000300373003711100211091010100001020640416342962910000103003830038300383003830038
1002430037225061295472510010101000010100005042771600300183003730037282863287671001020100002020000300373003711100211091010100001000640316342962910000103003830038300383003830038
1002430037225061295472510010101000010100005042771600300183003730037282863287671001020100002020000300373003711100211091010100001000640416342962910000103003830038300383003830038
1002430037225061295472510010101000010100005042771600300183003730037282863287671001020100002020000300373003711100211091010100001000640416442962910000103003830038300383003830038
1002430037225061295472510010101000010100005042771600300183003730037282863287671001020100002020000300373003711100211091010100001000640416442962910000103003830038300383003830038
10024300372250612954725100101010000101000050427716003001830037300372828632876710010201000020200003003730037111002110910101000010018640316442962910000103003830038300383003830038

Test 4: throughput

Count: 8

Code:

  movi v0.16b, 0
  ursra v0.4h, v8.4h, #3
  movi v1.16b, 0
  ursra v1.4h, v8.4h, #3
  movi v2.16b, 0
  ursra v2.4h, v8.4h, #3
  movi v3.16b, 0
  ursra v3.4h, v8.4h, #3
  movi v4.16b, 0
  ursra v4.4h, v8.4h, #3
  movi v5.16b, 0
  ursra v5.4h, v8.4h, #3
  movi v6.16b, 0
  ursra v6.4h, v8.4h, #3
  movi v7.16b, 0
  ursra v7.4h, v8.4h, #3
  movi v8.16b, 9

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.2508

retire uop (01)cycle (02)031e1f3f51schedule 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 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)a9acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0ec? simd retires (ee)? int retires (ef)f5f6f7f8fd
160204200891500029258011610080016100800285006401961200452006520065612801282008002820016005620065200651116020110099100100160000100009011110120216222006201600001002006620066200662006620066
160204200651500069425801161008001610080028500640196020045200652006561280128200800282001600562006520065111602011009910010016000010000011110120216212006201600001002006620066200662006620066
16020420065150002925801161008001610080028500640196120045200652006561280128200800282001600562006520065111602011009910010016000010000011110121116222006201600001002006620066200662006620066
16020420065151002925801161008001610080028500640196120045200652006561280128200800282001600562006520065111602011009910010016000010010011110121216122006201600001002006620066200662006620066
16020420065151002925801161008001610080028500640196020045200652006561280128200800282001600562006520065111602011009910010016000010000011110120216222006201600001002006620066200662006620066
16020420065150002925801161008001610080028500640196120045200652006561280128200800282001600562006520065111602011009910010016000010000011110121216222006201600001002006620066200662006620066
16020420065150002925801161008001610080028500640196120045200652006561280128200800282001600562006520065111602011009910010016000010000011110121216222006201600001002006620066200662006620066
160204200651500029258011610080016100800285006401961200452006520065612801282008002820016005620065200651116020110099100100160000100006611110120116212006201600001002006620066200662006620066
16020420065150002925801161008001610080028500640196120045200652006561280128200800282001600562006520065111602011009910010016000010000011110121216212006201600001002006620066200662006620066
16020420065150002925801161008001610080028500640196120045200652006561280128200800282001600562006520065111602011009910010016000010000011110121216222006201600001002006620066200662006620066

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03l2 tlb miss data (0b)3f51schedule 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)5f6061696d6emap 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)d9dadbddfetch restart (de)e0? int output thing (e9)eaec? simd retires (ee)? int retires (ef)f5f6f7f8fd
1600242008915004527800101080000108000050640000115200322005120051322800102080000201600002005120051111600211091010160000100010027821325211342004802053160000102005220052200522005220052
16002420051150045278001010800001080000506400001052003220051200513228001020800002016000020051200511116002110910101600001059310028821525211342004802037160000102005220052200522005220052
16002420051150045278001010800001080000506400001152003220051200513228001020800002016000020051200511116002110910101600001006310027821525211542004802040160000102005220052200522005220052
1600242005115104568800101080000108000050640000105200322005120051322800102080000201600002005120051111600211091010160000101010027821425211442004802043160000102005220052200522005220052
1600242005115004527800101080000108000050640000100200322005120051322800102080000201600002005120051111600211091010160000100010027821425211442004802052160000102005220052200522005220052
1600242005115004527800101080000108000050640000115200322005120051322800102080000201600002005120051111600211091010160000100010025821425211442004802047160000102005220052200522005220052
1600242005115004527800101080000108000050640000115200322005120051322800102080000201600002005120051111600211091010160000100010027821325211472004802055160000102005220052200522005220052
160024200511500452780010108000010800005064000011520032200512005132280010208000020160000200512005111160021109101016000010096100278214251911442004802050160000102005220052200522005220052
1600242005115004527800101080000108000050640000115200322005120051322800102080000201600002005120051111600211091010160000100010028821425211342004802063160000102005220052200522005220052
1600242005115004527800101080000108000050640000115200322005120051322800102080000201600002005120051111600211091010160000100010027821425211342004802042160000102006120061200612006120061

Test 5: throughput

Count: 16

Code:

  ursra v0.4h, v16.4h, #3
  ursra v1.4h, v16.4h, #3
  ursra v2.4h, v16.4h, #3
  ursra v3.4h, v16.4h, #3
  ursra v4.4h, v16.4h, #3
  ursra v5.4h, v16.4h, #3
  ursra v6.4h, v16.4h, #3
  ursra v7.4h, v16.4h, #3
  ursra v8.4h, v16.4h, #3
  ursra v9.4h, v16.4h, #3
  ursra v10.4h, v16.4h, #3
  ursra v11.4h, v16.4h, #3
  ursra v12.4h, v16.4h, #3
  ursra v13.4h, v16.4h, #3
  ursra v14.4h, v16.4h, #3
  ursra v15.4h, v16.4h, #3
  movi v16.16b, 17

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.2502

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)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)acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)fetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
16020440058299003025160108100160008100160020500128013214002040039400391997761999016012020016003220032006440039400391116020110099100100160000100000111101182160400361600001004004040040400404004040040
16020440039300003025160108100160008100160020500128013204002040039400391997761999016012020016014120032006440039400391116020110099100100160000100000111101181160400361600001004004040040400404004040040
16020440039303003025160108100160008100160020500128013204002040039400391997761999016012020016003220032006440039400391116020110099100100160000100000111101181160400361600001004004040040400404004040040
160204400393000183025160108100160008100160020500128013204002040039400391997761999016012020016003220032006440039400391116020110099100100160000100010111101182160400361600001004004040040400404004040040
16020440039300005125160108100160008100160020500128013204002040039400391997761999016012020016003220032006440039400391116020110099100100160000100000111101181160400361600001004004040040400404004040040
160204400392990069525160108100160008100160020500128013204002040039400391997761999016012020016003220032006440039400391116020110099100100160000100000111101181160400361600001004004040040400404004040040
16020440039300003025160108100160008100160020500128013204002040039400391997761999016012020016003220032006440039400391116020110099100100160000100003111101181160400361600001004004040040400904004040040
16020440039300003025160108100160008100160020500128013204002040039400391997761999016012020016003220032006440039400391116020110099100100160000100000111101182160400361600001004004040040400404004040040
16020440039301003025160108100160008100160020500128013204002040039400391997761999016012020016003220032006440039400391116020110099100100160000100000111101182160400361600001004004040040400404004040040
16020440039300033025160108100160008100160020500128013204002040039400391997761999016012020016003220032006440039400391116020110099100100160000100000111101181160400361600001004004040040400404004040040

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.2502

retire uop (01)cycle (02)0318191e1f3f51schedule 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)5f6061696d6emap 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)a9acbranch cond mispred nonspec (c5)cfd0d2l1i cache miss demand (d3)d5map dispatch bubble (d6)d9dadbddfetch restart (de)e0eaeb? simd retires (ee)? int retires (ef)f5f6f7f8fd
1600244003930100007172516001010160000101600005012800000154002040039400391999632001916001020160000203200004035040166311600211091010160000100000010022114151621120940036406160000104004040040400404004040040
1600244003929900926455242516001010160000101600005012800001154002040039400391999632001916001020160000203200004003940039111600211091010160000100000010022831416211820400362012160000104004040040400404004040102
1600244024230000132881092516001010160098101600005012800001154002040039400391999632001916001020160000203200004003940039111600211091010160000100003010022831161621119940036206160000104004040040400404004040040
1600244003930000120258251600101016000010160000501283236115400204003940039199963200191600102016000020320000400394003911160021109101016000010040001002283154921118940036206160000104004040040400404004040040
16002440091300000088251600101016000010160000501280000115400204003940039199963200191600102016000020320000400394003911160021109101016000010010301002283141621118740036206160000104004040040402464004040040
160024400393000000469716001010160000101600005012800001154002040039400391999632001916001020160000203200004003940039111600211091010160000100000010022831151621118940036206160000104004040040400404004040040
1600244003930000120692516001010160000101600005012800001154002040039400391999632001916001020160000203200004003940039111600211091010160000100000010022831161621117840036206160000104004040040400404019540040
160024400392990021046251600101016000010160000501280000115400204003940039199963200191600102016000020320000400394003911160021109101016000010000001002283131621191740036206160000104004040040400404004040040
160024400393000000462516001010160000101600005012800001154002040039400391999632001916001020160000203200004003940039111600211091010160000100000010023831416211202140036206160000104004040040400404004040040
16002440039299000352462516001010160000101600005012800001154002040039400391999632001916001020160000203200004003940039111600211091010160000100000010022831416211222140036206160000104004040040400404004040040