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

UQSUB (scalar, B)

Test 1: uops

Code:

  uqsub b0, b0, b1
  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 data (08)l2 tlb miss data (0b)18191e1f3a3f4e51schedule 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)91inst simd alu (9a)l1d tlb access (a0)l1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
10043037220000000612548251000100010003983133018303730372415328951000116820003037303711100130211000000000073116112630100030383038303830383038
100430372200007500612548251000100010003983133018303730372415328951000100020003037303711100130211000000000073116112630100030383038303830383038
100430372300009300612548251000100010003983133018303730372415328951000100020003037303711100130211000000000073116112630100030383038303830383038
100430372300007200612548251000100010003983133018303730372415328951000100020003037303711100101000000000073116112630100030383038303830383038
10043037230000000612548251000100010003983133018303730372415328951000100020003037303711100101000000000073116112630100030383038303830383038
10043037230000000612548251000100010003983133018303730372415328951000100020003037303711100101000000009073116112630100030383038303830383038
10043037220000000612548251000100010003983133018303730372415328951000100020003037303711100101000000000073116112630100030383038303830383038
10043037220000000612548251000100010003983133018303730372415328951000100020003037303711100101000000000073116112630100030383038303830383038
100430372200000002102548251000100010003983133018303730372415328951000100020003037303711100101000000000073116112630100030383038303830383038
100430372300003000612548251000100010003983133018303730372415328951000100020003037303711100101000000000073116112630100030383038303830383038

Test 2: Latency 1->2

Code:

  uqsub b0, b0, b1
  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)031e1f3f4e51schedule 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0ec? simd retires (ee)? int retires (ef)f5f6f7f8fd
102043003722500612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000071011611296340100001003003830038300383003830038
102043003722500612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000071011611296340100001003003830038300383003830038
102043003722500612952125101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000071011611296340100001003003830038300383003830038
1020430037225008282954844101001001000010010000500427731313001830086300372826932874510100200100002002000030037300371110201100991001001000010000071011611296340100001003003830038300383003830038
102043003722500612954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000071011611296340100001003003830038300383003830038
102043003722500612954825101001001000010010000500427731313001830037300372826532874510100200100002002036030037300371110201100991001001000010000071011611296340100001003003830038300383003830038
102043003722500612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000071011611296340100001003003830038300383003830038
102043003722500612954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000071011611296340100001003003830038300383003830038
102043003722500612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010003071011611296340100001003003830038300383003830038
102043003722500612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010001071011611296340100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03l2 tlb miss data (0b)18191e1f3a3f4e51schedule 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)ld unit uop (a6)l1d cache writeback (a8)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024300372250001800612954825100101010000101000050427731303001830037300372828732876710010201000020200003003730037111002110910101000010000006402162229630010000103003830038300383003830038
10024300372250005100612954825100101010000101000050427731303001830037300372828732884010010201000020200003003730037111002110910101000010000006402162229630010000103003830038300383003830038
1002430037225000000612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000006402162229630010000103003830038300383003830038
1002430037225000000612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000006402162229630010000103003830038300383003830038
1002430037225000000612954825100101010000101000050427731303001830037300372828732876710010201000020200003003730037111002110910101000010000006402162229630010000103003830038300383003830038
100243003722500000061295482510010101000010100005042773131300183003730037282873287671001020100002020000300373003711100211091010100001000017406402163329630010000103003830038300383003830038
1002430037225000000612954825100101010000101014950427731303001830037300372828732876710010201000020200003003730037111002110910101000010000906402162229630010000103003830038300383003830038
1002430037224000000612954825100101010000101000050427731303001830037300372828732876710010201000020200003003730037111002110910101000010000906402162229630010000103003830038300383003830038
10024300372250000006129548251001010100001010000504277313130018300373003728287328767100102010000202000030037300371110021109101010000100008406402162229630010000103003830038300383003830038
1002430037225000000612954825100101010000101000050427731313001830037300372828732876710010201000020200003003730037111002110910101000010000306402162229630010000103003830038300383003830038

Test 3: Latency 1->3

Code:

  uqsub b0, b1, b0
  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)03191e3f4e51schedule 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)l1d cache writeback (a8)a9acbranch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
102043003722500662954825101001001000010010000500427731313001830037300372826532874510100208100002002000030037300371110201100991001001000010000000071011611296340100001003003830038300383003830038
102043003722500612954825101001001000010010000500428274113001830037300372826532874510100200100002002000030037300371110201100991001001000010000000071011611296340100001003003830038300383003830038
102043003722500612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000000071011611296340100001003003830038300383003830038
102043003722500612954825101001001000010010000500427731313001830037300372826532874510100200104942002000030037300371110201100991001001000010000000071011611296340100001003003830038300383003830038
102043003722500612951125101001001000010010000500427731313001830037300372826532874510100200104962002000030037300371110201100991001001000010000000071011611296340100001003003830038300383003830038
102043003722500612954825101001001000010010000500427731303001830037300372826532874510100200100002002000030037300371110201100991001001000010000000071011611296340100001003003830038300383003830038
102043003722500612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000000071011611296340100001003003830038300383003830038
102043003722500612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010000000071014111296340100001003003830038300383003830038
102043003722500612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010022000071011611296340100001003003830038300383003830038
102043003722500612954825101001001000010010000500427731313012630037300372826532874510100200100002002000030037300371110201100991001001000010000000071011611296340100001003003830038300383003830038

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)18191e1f3a3f4e51schedule 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)ld unit uop (a6)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002430037225000030006129548251001010100001010000504277313130018300373003728287328767100102010000202000030037300371110021109101010000100000006407166629630010000103003830038300383003830038
100243003722500000006129548251001010100001010000504277313130018300373003728287328767100102010000202000030037300371110021109101010000100000006406166629630010000103003830038300383003830038
100243003722500000006129548251001010100001010000504277313130018300373003728287328767100102010000202000030037300371110021109101010000100000006406166729630010000103003830038300383003830038
100243003722500000006129548251001010100001010000504277313030018300373003728287328767100102010000202000030037300371110021109101010000100010006406166629630010000103003830038300383003830038
100243003722500000008929548251001010100001010000504277313130018300373003728287328767100102010000202000030037300372110021109101010000100000006406166629630010000103003830038300383003830038
100243003722500000006129548251001010100001110000504277313130018300373003728287328767100102010000202000030037300371110021109101010000100030006406166729630010000103003830038300383003830038
100243003722500000006129548251001010100001010000504277313130018300373003728287328767100102010000202000030037300371110021109101010000100000006407166729630010000103003830038300383003830038
100243003722500000006129548251001010100001010000504277313030018300373003728287328767100102010000202000030037300371110022109101010000100000006405166729630010000103003830038300383003830038
100243003722500000006129539251001010100001010000504277313030018300373003728287328767100102010000202000030037300372110021109101010000100000006406166629630010000103003830038300383003830038
100243003722500000006129548251001010100001010000504277313030018300373003728287328767100102010000202000030037300371110021109101010000100000006407166729630010000103003830038300383003830038

Test 4: throughput

Count: 8

Code:

  uqsub b0, b8, b9
  uqsub b1, b8, b9
  uqsub b2, b8, b9
  uqsub b3, b8, b9
  uqsub b4, b8, b9
  uqsub b5, b8, b9
  uqsub b6, b8, b9
  uqsub b7, b8, b9
  movi v8.16b, 9
  movi v9.16b, 10

(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)l2 tlb miss instruction (0a)l2 tlb miss data (0b)191e1f3a3f51schedule 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)ld unit uop (a6)l1d cache writeback (a8)a9acbranch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042005815011000021242580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100000000511411161011200360800001002004020040200402004020040
80204200391501100002482580100100800001008000050064000012002020039200399973399978010020080000200160000200392003911802011009910010080000100000030511481688200360800001002004020040200402004020040
80204201031501100002482580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100003000511410161011200360800001002004020040200402004020040
8020420039150110000248258010010080000100800005006400000200202003920039997339997801002008000020016000020039200391180201100991001008000010000000051141116810200360800001002004020040200402004020040
802042003915011000024825801001008000010080000500640000020020200392003999733999780100200800002001600002003920039118020110099100100800001000000005114516116200360800001002004020040200402004020040
802042003915011000024825801001008000010080000500640000020020200392003999733999780100200800002001600002003920039118020110099100100800001000000005114616116200360800001002004020040200402004020040
802042003915011000024825801001008000010080000500640000120020200392003999733999780100200800002001600002003920039118020110099100100800001000000005114816105200360800001002004020040200402004020040
80204200391501100002482580100100800001008000050064000012002020039200399973399978010020080000200160000200392003911802011009910010080000100000000511411161111200360800001002004020040200402004020040
80204200391501100002482580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100000000511410161110200360800001002004020040200402004020040
8020420039150110000248258010010080000100800005006400000200202003920039997339997801002008000020016000020039200391180201100991001008000010000000051141016510200360800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)033f51schedule 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)acc2cfd0d5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242003915040258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000050200116112003680000102004020040200402004020040
800242003915040258001010800001080000506400000200202003920039999631001980010208000020160000200392003911800211091010800001000050200116112003680000102004020040200402004020040
8002420039150515258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000050200116112003680000102004020040200402004020040
800242003915040258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000050200116112003680000102004020040200402004020040
800242003915040258001010800001080000506400000200202003920039999631001980010208000020160000200392003911800211091010800001000050200116112003680000102004020040200402004020040
800242003915040978001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000050200116112003680000102004020040200402004020040
800242003915040258001010800001080000506400000200202003920039999631001980010208000020160000200392003911800211091010800001000050200116112003680000102004020040200402004020040
800242003915040258001010800001080000506400000200202003920039999631001980010208000020160000200392003911800211091010800001000050200116112003680000102004020040200402004020040
8002420039150325258001010800001080000506400000200202003920039999631001980010208000020160000200392003911800211091010800001000050200116112003680000102004020040200402004020040
800242003915061258001010800001080000506400000200202003920039999631001980010208000020160000200392003911800211091010800001000050200116112003680000102004020040200402004020040