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

URSHR (vector, 8H)

Test 1: uops

Code:

  urshr v0.8h, v0.8h, #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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100430372306125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372206125472510001000100039816013018303730372414328951000100010003037303711100110001073116112629100030383038303830383038
100430372206125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372206125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372206125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372206125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372206125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303723061254725100010001000398160130183037303724143289510001000100030373037111001100001873116112629100030383038303830383038
100430372306125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  urshr v0.8h, v0.8h, #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)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)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)9fld 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
1020430037225100061295472510100104100001241000050042785123001830037301332826432876110100200101672001016730277300371110201100991001001000010000012071013311296330100001003003830038300383003830038
102043003722510423010329547251010010010000100100005004277160300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
102043003722500360612954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100000109071011611296330100001003003830038301313013330038
10204300842261121601432295472510112100100001001000050042771603001830037300372826421287451010020010000200100003003730037111020110099100100100001000020071011611296330100001003003830038300383003830038
1020430037225007506129547251010010010000100100005004277160300183003730037282643287451010020010000200100003003730037111020110099100100100001000100271011611296330100001003003830038300383003830038
1020430037225002406129547251010010010000100100005004277160300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
10204300372240066010329547251010010010000100100005004277160300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
1020430037225002706129547251010010010000100100005004277160300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
102043003722500477016629547251010010010000100100005004277160300183003730037282643287451010020010000200100003003730037411020110099100100100001000000071011611296330100001003003830038300383003830038
1020430037225001506129547251010010010000100100005004277160300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038

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)18191e1f3a3f4e5051schedule 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)l1d cache writeback (a8)a9acc2branch 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
100243003722500000006129547300212510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000000000006403163329629010000103003830038300383003830038
1002430037225000044100612954702510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000000000006403163329629010000103003830038300383003830038
1002430037225000054300612954702510010101000010100005042771600300183003730037282863287671001020101632010000300373003711100211091010100001000000000006403163329629010000103003830038300383003830038
100243003722500000002512954702510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000000000006403163329629010000103003830038300383003830038
100243003722500000005362954702510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000000000006403163329629010000103003830038300383003830038
10024300372250000000612954702510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000000000006403163329629010000103003830038300383003830038
1002430037225000000061295470251001010100001010000504277160030018300373003728286328767100102010000201000030037300371110021109101010000100000013500006403163329629010000103003830038300383003830038
10024300372250000000612954702510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000000000006403163329629010000103003830038300383003830038
1002430037225000031200612954702510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000000000006403163329629010000103003830038300383003830038
1002430037225000037200842954702510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000000000006403163329629010000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  urshr v0.8h, v8.8h, #3
  urshr v1.8h, v8.8h, #3
  urshr v2.8h, v8.8h, #3
  urshr v3.8h, v8.8h, #3
  urshr v4.8h, v8.8h, #3
  urshr v5.8h, v8.8h, #3
  urshr v6.8h, v8.8h, #3
  urshr v7.8h, v8.8h, #3
  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
802042003915033302580108100800081008002050064013202002020039200399977699908054020080032200800322003920039118020110099100100800001000011151180160020036800001002004020105200402004020040
80204200391500302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
8020420039150030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100047511151180160020078800001002004020040200402004020040
80204200901500304480212100800081008002050064013202002020039200399977699908012020080032200801382003920039118020110099100100800001000011151180160020075800001002004020040200402004020040
802042003915033025801081008000810080020500640132020020200392003999776100148012020080032200800322003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
80204200391500302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
8020420039150231302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001001011151180160020036800001002004020040200402004020040
80204200391500302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
80204200391500302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
80204200391500302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000011151180160020036800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03mmu table walk data (08)l2 tlb miss instruction (0a)18191e1f3a3f51schedule 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)simd prf full (72)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)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200511500000000402580010108000010800005064000002002020039200399996031001980010208000020800002003920039118002110910108000010000050201816852003680000102004020040200402004020040
80024200391500000000402580010108000010800005064000002002020039200399996031004480010208000020800002003920039118002110910108000010000050208161182003680000102004020040200402004020040
8002420039150000000040258001010800001080000506400001200202003920039999603100198001020800002080000200392003911800211091010800001000005020716752003680000102004020040200402004020040
80024200391500000000402580010108000010800005064000012002020039200399996031001980010208000020800002003920039118002110910108000010000050209167102003680000102004020040200402004020040
8002420039150000000040258001010800001080000506400001200202003920039999603100198001020800002080000200922003911800211091010800001000005020416682003680000102004020040200402004020040
8002420039150000000040258001010800001080000506400001200202003920039999603100198001020800002080000200392003911800211091010800001000005020716952003680000102004020040200402004020040
8002420039150000000040258001010800001080000506400000200202003920039999603100198001020800002080000200392003911800211091010800001000005020716862003680000102004020040200402004020040
8002420039150000000040258001010800001080000506400000200202003920039999603100198001020800002080000200392008911800211091010800001000005020816792003680000102004020040200402004020040
80024200391500000000402580010108000010800005064000012002020039200399996031001980010208000020800002003920039118002110910108000010000050206166112003680000102004020040200402004020040
80024200391500000000402580010108000010800005064000012002020039200391000603100198001020800002080000200392003911800211091010800001000005020716682003680000102004020040200402004020040