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

STR (signed offset, Q)

Test 1: uops

Code:

  str q0, [x6, #0x10]
  mov x0, 0

(no loop instructions)

1000 unrolls and 1 iteration

Retires: 1.000

Issues: 1.000

Integer unit issues: 0.000

Load/store unit issues: 1.000

SIMD/FP unit issues: 0.000

retire uop (01)cycle (02)031e1f223f46494f51schedule uop (52)schedule ldst uop (55)dispatch ldst uop (58)simd uops in schedulers (5a)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map ldst uop (7d)map ldst uop inputs (80)8283flush restart other nonspec (84)85inst all (8c)inst simd store (99)inst ldst (9b)l1d tlb access (a0)l1d cache miss st (a2)a4ld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)acafbcl1d cache miss st nonspec (c0)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? ldst retires (ed)f5f6f7f8fd
10055424031528161652510001000100022472151854354335534001000100020005425431110011000100010004200100202100224273116115391000544544543543543
10045424030528161612510001000100022472151854254235534011000100020005425431110011000100010004200100202100224273116115391000543543543555543
10045424030527161612510001000100022448151754254235534001000100020005425421110011000100010004200100202100224273116115391000543543543543543
10045424030527161602510001000100022472151754254235534001000100020005425421110011000100010004200100202100224273116115391000543543543543543
10045424030527161652510001000100022448151754354335534001000100020005425421110011000100010004200100202100224273116115391000543543555543543
10045424030527161602510001000100022448151754254235634001000100020005435431110011000100010004200100202100224273116115511000543555543543543
10045424030527161612510001000100022448151754254235534001000100020005425421110011000100010004200100202100224273116115391000543543543544544
10045424030527161612510001000100022448151754254235534011000100020005425421110011000100010004200100202100224273116115391000543543543543543
10045424030527161602510001000100022448151754254235534001000100020005425431110011000100010004200100202100224273116115391000543543543543543
10045544030527161602510001000100022448151754254235534001000100020005435431110011000100010004200100202100224273116115391000543543543543543

Test 2: throughput

Count: 8

Code:

  str q0, [x6, #0x10]
  str q0, [x6, #0x10]
  str q0, [x6, #0x10]
  str q0, [x6, #0x10]
  str q0, [x6, #0x10]
  str q0, [x6, #0x10]
  str q0, [x6, #0x10]
  str q0, [x6, #0x10]
  mov x7, x6
  mov x8, x6
  mov x9, x6
  mov x10, x6
  mov x11, x6
  mov x12, x6
  mov x13, x6

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.5005

retire uop (01)cycle (02)03mmu table walk data (08)l2 tlb miss data (0b)18191e1f22233f46494f51schedule uop (52)schedule int uop (53)schedule ldst uop (55)dispatch int uop (56)dispatch ldst uop (58)int uops in schedulers (59)simd uops in schedulers (5a)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map ldst uop (7d)map int uop inputs (7f)map ldst uop inputs (80)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 store (99)inst ldst (9b)9fl1d tlb access (a0)l1d cache miss st (a2)ld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)acafbcl1d cache miss st nonspec (c0)cfd5map dispatch bubble (d6)ddfetch restart (de)dfe0? ldst retires (ed)? int retires (ef)f5f6f7f8fd
80205400503000000091040036160025801001008000010080000500183942404001540042400402995533000080100200800002001600004004240042118020110099100100800008000010080000340800020280002234511211612240037800001004004340043400434004340052
802044004229900000310400351616025801001008000010080000500185060204002640042400423032433000080100200800002001600004004240464118020110099100100800008000010080000340800020280002234511211611240037800001004004340043400434005040043
802044004230000000600400271616025801001008000010080000500183978404001740050400422996233000080100200800002001600004004040049118020110099100100800008000010080000340800000280002234511211611240039800001004004340604400434005140043
802044004030000000610400271616325801001008000010080000500183942404001740040400422995333000880100200800002001600004032140182118020110099100100800008000010080000340800620280002234511211611240048800001004004340043400524004340043
80204400423000000031040036016025801001008000010080000500183935204001740042400512996433000080100200800002001600004004040042118020110099100100800008000010080000340800020280002234511211611240039800001004004340043400434005040043
80204400423000000091040027161602580100100800001008000050018394240400154004240040299553300098010020080000200160000400424004211802011009910010080000800001008000000800020280002234511211611240039800001004004340051400434004340598
802044005130000000300400341616025801001008000010080000500183942424001740042400512995532999880100200800002001600004004040042118020110099100100800008000010080000340800000280002034511211611240039800001004004140041400414004140041
802044004030000000300400251616025801001008000010080000500183983204001740049400492995333000080100200800002001600004004040042118020110099100100800008000010080000340800020280002234511211611240039800001004005140041400514004140041
8020440042300000003004002701602580100100800001008000050018393520400174004040050299633300008010020080000200160000400494004211802011009910010080000800001008006234080002108000200511211613240039800001004004340041400434004340043
80204400403000000031040025161602580100100800001008000050018398560400174004240050299643299988010020080000200160000400514004211802011009910010080000800001008000000800023280002234511211611240039800001004004340041400434005040043

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.5007

retire uop (01)cycle (02)03l1d tlb fill (05)mmu table walk data (08)09l2 tlb miss data (0b)18191e1f2223243a3f46494f51schedule uop (52)schedule int uop (53)schedule ldst uop (55)dispatch int uop (56)dispatch ldst uop (58)int uops in schedulers (59)simd uops in schedulers (5a)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map ldst uop (7d)map int uop inputs (7f)map ldst uop inputs (80)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 store (99)inst ldst (9b)9fl1d tlb access (a0)l1d tlb miss (a1)l1d cache miss st (a2)a4ld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)a9acafbcl1d cache miss st nonspec (c0)l1d tlb miss nonspec (c1)c2cfd5map dispatch bubble (d6)d9ddfetch restart (de)e0? int output thing (e9)? ldst retires (ed)? int retires (ef)f5f6f7f8fd
800254005829910110001910014004316168425800101080000108000050183969204003540052400582999433003880010208000020160000400524005211800211091010800008000010800141536018001600188000216361405020716010640050080000104006140060400514005940060
8002440052299111000017100140032160225800101080000108000050183981204003340058400502998533003280010208000020160000400604005111800211091010800008000010800151536018001612208000016361405020616081240045080000104005940048400604005240053
800244006030011100001910014004401682580010108000010800005018401990400274005940059299933300318001020800002016000040059400611180021109101080000800001080015143601800141019800001401405020616061040044080000104005240060400534005940051
80024400473001001000200001400321516125800101080000108000050184031604002740057400472998233003380010208000020160000400474004711800211091010800008000010800161534008001602188000216361415020616071040055080000104004840060400534005940061
80024400582991010000171001400350160258001010800001080000501840340040027400574004729996330032800102080000201600004004740047118002110910108000080000108001514360180016011480002163614050201016010640055080000104006040053400484005340059
800244005030011010001410014003516162992580010108000010800005018403160400274005740060299823300278001020800002016000040058400471180021109101080000800001080014160208001600188000216014150201016010640054080000104005440059400524006040061
8002440059300111000018100140045016625800101080000108021650184022104015640205400612999333003280010208000020160000400574006011800211091010800008000010800151436018001402188000214361415020616061040055080000104004840048400534004840061
8002440047300111100019000140032016525800101080000108000050183969204003340053400582998733003880010208000020160000400474005811800211091010800008000010800151536018001600208000016361405020616010640044080000104005240059400484006040048
80024400593001001000141001400430162258001010800001080000501840340040022400574006029996330027800102080000201600004005940049118002110910108000080000108001515360180014001480002163614150201016010640049080000104004840059400484004840059
80024400593001010000190001400321616925800101080000108000050183988404003340060400522998633003980010208000020160000400504004711800211091010800008000010800151536028001610208000216361405020716061040044080000104005340048400604005140053