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, 2S)

Test 1: uops

Code:

  urshr v0.2s, v0.2s, #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)03181e3f4e51schedule 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
1004303723006125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303723006125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303723006125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303723006125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037230012625472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303722006125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303723008225472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303723006125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037220014525472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037220014525472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  urshr v0.2s, v0.2s, #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)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)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020430037225061295472510100100100001001000050042771601300183003730037282643287451010020010000200100003003730037111020110099100100100001005007101161129633100001003003830038300383003830038
1020430037225061295472510100100100001001000050042771601300183003730037282643287451010020010000200100003003730037111020110099100100100001005007101161129633100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010042037101161129633100001003003830038300383003830038
1020430037225061295472510115127100001001000050042771601300183008430037282643287451010020010000200100003003730037111020110099100100100001004007101161129633100001003003830038300383003830038
1020430037225061295472510100100100001001000050042771601300183003730037282643287451010020010000200100003003730037111020110099100100100001002007101161129633100001003003830038300383003830038
1020430037225061295472510100100100001001000050042771601300183003730037282643287451010020010000200100003003730037211020110099100100100001000007101161129633100001003003830038300383003830038
1020430037225061295472510100100100001001000050042771601300183003730037282643287451010020010000200100003003730037111020110099100100100001003007101161129633100001003003830038300383003830038
1020430037225061295472510100100100001001000050042771601300183003730037282643287451010020010000200100003003730037111020110099100100100001002007101161129633100001003003830038300383003830038
10204300372250612954725101001001000010010300500427716013001830037300372826432874510100200100002001000030037300371110201100991001001000010010247101161129633100001003003830038300383003830038
1020430037225061295472510100100100001001000050042771601300183003730037282643287451010020010000200100003003730037111020110099100100100001000007101161129633100001003003830038300383003830038

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)l1d tlb miss (a1)ld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)a9acc2branch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
100243003722500000008229547251001010100001010000504277160030018300373003728286328767100102010000201000030037300371110021109101010000100000000006404163329629010000103003830038300383003830038
100243003722500000006129547251001010100001010000504277160030018300373003728286328767100102010000201000030037300371110021109101010000100000000006403163329629010000103003830038300383003830038
100243003722500000006129547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000000006403273329629010000103003830038300383003830038
100243003722500000006129547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000000006403163329629010000103003830038300383003830038
100243003722500000006129547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000000006403163329629010000103003830038300383003830038
100243003722500000006129547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000000006403163329629010000103003830038300383003830038
100243003722500000006129547251001010100001010000504277160030018300373003728286328767100102010000201000030037300371110021109101010000100000000006403163329629010000103003830038300383003830038
100243003722500000006129547251001010100001010000504277160030162300373003728286328767100102010000201000030037300371110021109101010000100000000006403163329629010000103003830038300383003830038
1002430037224000000061295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000201016953207894735329881310000103022830370303213037030324
100243041422701579366160442029482100100691410048121105076428662403027030367303682831234288971106424111492011147303703036881100211091010100001002002019540007945573329629010000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  urshr v0.2s, v8.2s, #3
  urshr v1.2s, v8.2s, #3
  urshr v2.2s, v8.2s, #3
  urshr v3.2s, v8.2s, #3
  urshr v4.2s, v8.2s, #3
  urshr v5.2s, v8.2s, #3
  urshr v6.2s, v8.2s, #3
  urshr v7.2s, v8.2s, #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)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 tlb access (a0)l1d tlb miss (a1)l1d 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
8020420058150842258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000011151184161020036800001002004020040200402004020040
8020420039150968258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000011151180160020036800001002004020040200402004020040
8020420039150302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000024011151180160020036800001002004020040200402004020040
8020420039150806258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000011151180160020036800001002004020040200402004020040
8020420039150141258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000011151180160020036800001002004020040200402004020040
802042003915030798010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000011151180160020036800001002004020040200402004020040
802042003915030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000011151180160020036800001002004020040200402004020040
802042003915030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000011151180160020036800001002004020040200402004020040
802042003915010262580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000023611151180160020036800001002004020040200402004020040
802042003915030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000011151180160020036800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03mmu table walk instruction (07)l2 tlb miss data (0b)1e3f51schedule 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
80024200501500012402580010108000010800005064000010200202003920039999631001980010208000020800002003920039118002110910108000010805020001316232003680000102010020040200402004020040
8002420039151110402580010108000010800005064000000200202003920039999631001980010208000020800002003920039118002110910108000010805020000316442003680000102004020040200402004020040
8002420039150000402580010108000010800005064000000200202003920039999631001980010208000020800002003920039118002110910108000010135020000516532003680000102004020040200402004020040
8002420039150000402580010108000010800005064000000200202003920039999631001980010208000020800002003920039118002110910108000010335020000416442003680000102004020040200402004020040
8002420039150000402580010108000010800005064000000200202003920039999631001980010208000020800002003920039118002110910108000010135020000526442016080000102004020040200402004020040
8002420039150000402580010108000010800005064000010200202003920039999631001980010208000020800002003920039118002110910108000010505020000516332003680000102004020040200402004020040
8002420039150000402580010108000010800005064000000200202003920039999631001980010208000020800002003920039118002110910108000010005020000416422003680000102004020040200402004020040
8002420039150000402580010108000010800005064000000200202003920039999631001980010208000020800002003920039118002110910108000010005020000516442003680000102004020040200402004020040
8002420039150000402580010108000010800005064000000200202003920039999631001980010208000020800002003920039118002110910108000010135020000516552003680000102004020040200402004020040
8002420039150000402580010108000010800005064000000200202003920039999631001980010208000020800002003920039118002110910108000010035020000516322003680000102004020040200402004020040