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

TST (register, lsl, 64-bit)

Test 1: uops

Code:

  tst x0, x1, lsl #17
  mov x0, 1
  mov x1, 2

(no loop instructions)

1000 unrolls and 1 iteration

Retires: 1.000

Issues: 2.000

Integer unit issues: 2.000

Load/store unit issues: 0.000

SIMD/FP unit issues: 0.000

retire uop (01)cycle (02)031e3f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)606d6emap stall dispatch (70)flags prf full (73)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst int alu (97)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)f5f6f7f8fd
100470950611000304252000200010004087717097094982135611000100020007097811100110000073122116842000710710710710710
100470950611000304252000200010004087717097094982535611000100020007097811100110001073122116842000710710710710710
100470950611000304252000200010004087717097094982535611000100020007097811100110000073122116842000710710710710710
100470950611000304252000200010004087717097094982535611000100020007097811100110000073122116842000710710710710710
100470950611000304252000200010004087717097094982135611000100020007097811100110000073122116842000710710710710710
100470950611000304252000200010004087717097094982135611000100020007097811100110000073122116842000710710710710710
100470950611000304252000200010004087717097094982135611000100020007097811100110000073122116842000710710710710710
100470950611000304252000200010004087717097094982535611000100020007097811100110000073122116842000710710710710710
100470960611000304252000200010004087717097094982135611000100020007097811100110000073122116842000710710710710710
100470950611000304252000200010004087717097094982535611000100020007097811100110000073122116842000710710710710710

Test 2: Latency 3->1

Chain cycles: 1

Code:

  tst x0, x1, lsl #17
  cset x0, cc
  mov x0, 1
  mov x1, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code, minus 1 chain cycle): 2.0035

retire uop (01)cycle (02)033f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)696a6d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)9fl1d cache writeback (a8)accfd0d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
2020430035225520100002989325301003010020100195619849269553003530035273693274782010020200302003003514511202011009910020100101000013101231222995430000101003003630036300363003630036
2020430035225789100002989331301003010020100195619849269553003530035273693274782010020200302003003514511202011009910020100101000013101231222995430000101003003630036300363003630036
2020430035225126100002989325301003010020100195619849269553003530035273693274782010020200302003003514511202011009910020100101000013101231222995430066101003003630036300363003630036
2020430035225685100002989325301003010020100195619849269553003530035273693274782010020200302003003514511202011009910020100101000013101231222995430000101003003630036300363003630036
2020430035225810100002989325301003010020100195619849269553003530035273693274782010020200302003003514511202011009910020100101000013101231222995430000101003003630036300363003630036
2020430035225145100002989325301003010020100195619849269553003530035273693274782010020200302003003514511202011009910020100101000013101231222995430000101003003630036300363003630036
2020430035225145100002989325301003010020100195619849269553003530035273693274782010020200302003003514511202011009910020100101000013101231222995430000101003003630036300363003630036
2020430035225126100002989325301003010020100195619849269553003530035273693274782010020200302003003514511202011009910020100101000013101231322995430000101003003630036300363003630036
2020430035225251100002989325301003010020100195619849269553003530035273693274782010020200302003003514511202011009910020100101000013101231222995430000101003003630036300363003630036
2020430035225124100002989325301003010020100195619849269553003530035273693274782010020200302003003514511202011009910020100101000013101231222995430000101003003630036300363003630036

1000 unrolls and 10 iterations

Result (median cycles for code, minus 1 chain cycle): 2.0035

retire uop (01)cycle (02)031e1f3f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)696a6b6d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)9fl1d cache writeback (a8)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
200243003522500359710000298912530010300102001019562894926955030035300352739132749820010200203002030035145112002110910200101001001270233242995830000100103003630036300363003630036
2002430035225006110000298912530012300122001219562874926955030035300352739132749820012200203002030035156112002110910200101001001270233222995830000100103003630036300363003630036
2002430035225006110000298912530010300102001019562894926955030035300352739132749820010200203002030035145112002110910200101001001270233222995830000100103003630036300363003630036
2002430035225006110000298912530010300102001219562894926955030035300352739132749820012200203002030035145112002110910200101001001270233222995830000100103003630036300363003630036
2002430035225006110000298912530010300102001019562894926955030035300352739132749820010200203002030035145112002110910200101001001270233222995830000100103003630036300363003630036
2002430035224006110000298912530010300102001019562894926955030035300352739132749820010200203002030035145112002110910200101001001270233222995830000100103003630036300363003630036
2002430035225006110000298912530012300122001019562894926955030035300352739132749820010200203002030035145112002110910200101001001270233222995830000100103003630036300363003630036
2002430035224006110000298912530010300102001019562894926955030035300352739132749820010200203002030035145112002110910200101001001270233122995830000100103003630036300363003630036
2002430035225006110000298912530010300102001019562894926955030035300352739132749820010200203002030035145112002110910200101001001270233322995830000100103003630036300363003630036
2002430035225006110000298912530010300102001019562894926955030035300352739132749820010200203002030035145112002110910200101001001270233222995830000100103003630036300363003630036

Test 3: Latency 3->2

Chain cycles: 1

Code:

  tst x0, x1, lsl #17
  cset x1, cc
  mov x0, 1
  mov x1, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code, minus 1 chain cycle): 2.0035

retire uop (01)cycle (02)031e3f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)60696a6d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)9fc2cfd0d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
20204300352250168100002989325301003010020100195619814926955300353003527369327478201002020030200300351451120201100991002010010100013101331242995430000101003003630036300363003630036
20204300352250145100002989325301003010020100195619814926955300353003527369327478201002020030200300351451120201100991002010010100013101231222995430000101003003630036300363003630036
20204300352250145100002989325301003010020100195619814926955300353003527369327478201002020030200300351451120201100991002010010100013101231222995430000101003003630036300363003630036
20204300352240166100002989325301003010020100195619814926955300353003527369327478201002020030200300351451120201100991002010010100013101231222995430000101003003630036300363003630036
20204300352240124100002989325301003010020100195619814926955300353003527369327478201002020030200300351451120201100991002010010100013101231222995430000101003003630036300363003630036
20204300352250166100002989325301003010020100195619814926955300353003527369327478201002020030200300351451120201100991002010010100013101231222995430000101003003630036300363003630036
20204300352250166100002989325301003010020100195619814926955300353003527369327478201002020030200300351451120201100991002010010100013101231222995430000101003003630036300363003630036
20204300352250852100002989325301003010020100195619814926955300353003527369327478201002020030200300351451120201100991002010010100013101231222995430000101003003630036300363003630036
20204300352240643100002989325301003010020100195619814926955300353003527369327478201002020030200300351451120201100991002010010100013101331322995430000101003003630036300363003630036
20204300352250601100002989325301003010020100195619814926955300353003527369327478201002020030200300351451120201100991002010010100013101231222995430000101003003630036300363003630036

1000 unrolls and 10 iterations

Result (median cycles for code, minus 1 chain cycle): 2.0035

retire uop (01)cycle (02)03191e1f3f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)5f60696a6d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)9facbranch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
2002430035225000611000029891253001030010200101956289014926955300353003527391327498200102002030020300351451120021109102001010010001270133112995830000100103003630036300363003630036
2002430035225000611000029891253001030010200101956289014926955300353003527391327498200102002030020300351451120021109102001010010001270133112995830000100103003630036300363003630036
2002430035225000611000029891253001030010200101956289014926955300353003527391327498200102002030020300351451120021109102001010010001270133112995830000100103003630036300363003630036
2002430035225000611000029891253001030010200101956289014926955300353003527391327498200102002030020300351451120021109102001010010001270133112995830000100103003630036300363003630036
2002430035225000611000029891253001030010200101956289014926955300353003527391327498200102002030020300351451120021109102001010010001270133112995830000100103003630036300363003630036
2002430035225000611000029891253001030010200101956289014926955300353003527391327498200102002030020300351451120021109102001010010001270133112995830000100103003630036300363003630036
2002430035225000611000029891253001030010200101956289014926955300353003527391327498200102002030020300351451120021109102001010010001270133112995830000100103003630036300363003630036
2002430035225000611000029891253001030010200101956289014926955300353003527391327498200102002030020300351451120021109102001010010001270133112995830022100103003630036300363003630036
2002430035225000611000029891253001030010200101956289014926955300353003527391327498200102002030020300351451120021109102001010010001270133112995830000100103003630036300363003630036
2002430066225000611000029891253001030010200101956289014926955300353003527391327498200102002030020300351451120021109102001010010001270133112995830000100103003630036300363003630036

Test 4: throughput

Count: 8

Code:

  tst x0, x1, lsl #17
  tst x0, x1, lsl #17
  tst x0, x1, lsl #17
  tst x0, x1, lsl #17
  tst x0, x1, lsl #17
  tst x0, x1, lsl #17
  tst x0, x1, lsl #17
  tst x0, x1, lsl #17
  mov x0, 1
  mov x1, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.6676

retire uop (01)cycle (02)03mmu table walk data (08)09l2 tlb miss data (0b)18191e1f3f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)60696a6d6emap stall dispatch (70)flags prf full (73)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)9fl1d tlb access (a0)l1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
802045347340100000006180000487412516010016010080100344000514950330534105341043298206334336080100802001602005341078118020110099100801001000001200511022412533921600001005341153411534115341153411
802045341039900000006180000487412516010016010080100344000514950544534105341043298206334336080100802001602005341078118020110099100801001000000030511012421533921600001005341153411534115341153411
802045362340000000006180000487412516010016010080100344000514950330534105341043298206034336080100802001602005341078118020110099100801001000000000511012411533921600001005341153411534115341153411
802045341040000000008280000487412516010016010080100344000514950330534105341043298206334336080100802001602005341078118020110099100801001000000000511012411533921600001005341153411534115341153411
802045341040000000006180000487412516010016010080100344000514950330534105341043298206034336080100802001602005341078118020110099100801001000000000511012411533921600001005341153411534115341153411
802045341040000000006180000487412516010016010080100344000514950330534105341043298205034336080100802001602005341078118020110099100801001000000000511012411533921600001005341153411534115341153411
802045341040000000006180000487412516010016010080100344000514950330534105341043298206034336080100802001602005341078118020110099100801001000000000511012411533921600001005341153411534115341153411
802045341040000000006180000487412516010016010080100344000514950330534105341043298206334336080100802001602005341078118020110099100801001000001030511012411533921600001005341153411534115341153576
802045341040000000006180000487412516010016010080100344000514950330534105341043298206334336080100802001602005341078118020110099100801001000000000511012411533921603651005341153411534115341153411
8020453410400000001206180000487412516010016010080100344000514950330534105341043298206034336080100802001602005341078118020110099100801001000000000511012411533921602871005341153411534115341153411

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.6673

retire uop (01)cycle (02)03l2 tlb miss data (0b)1e3f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)696a6d6emap stall dispatch (70)flags prf full (73)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)9fl1d tlb access (a0)l1d tlb miss (a1)l1d cache writeback (a8)accfd5map dispatch bubble (d6)dbddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
800245340239909618000047946251600101600108001034381304950300533805338043290270734335280010800201600205338078118002110910800101000018502012401153359160000105338153381533815338153381
8002453380400002378000047946251600101600108001034381304950300533805338043290270734335280010800201600205338078118002110910800101000027502012401153359160000105338153381533815338153381
800245338040003618000047946251600101600108001034381304950300533805338043290270734335280010800201600205338078118002110910800101000021502012401153359160000105338153381533815338153381
80024533804000061800004794625160010160010800103438130495030053380533804329027073433528001080020160020533807811800211091080010100019502012401153359160000105338153381533815338153381
8002453380400006180000479462516001016001080010343813049503005338053380432902707343352800108002016002053380781180021109108001010000138502012401153359160000105338153381533815338153381
800245338039900618000047946251600101600108001034381304950300533805338043290270734335280010800201600205338078118002110910800101000018502012401153359160000105338153381533815338153381
80024533804000061800004794625160010160010800103438130495030053380533804329025623433528001080020160020533807811800211091080010100000502012401153359160000105338153381534255338153381
800245338040000618000047946251600101600108001034381304950300533805338043290270734335280010800201600205338078118002110910800101000024502012401153359160000105338153381533815338153381
800245338040000618000047946251600101600108001034381304950300533805338043290256234335280010800201600205338078118002110910800101000021502012401153359160000105338153381533815338153381
80024533804000061800004794625160010160010800103438130495030053380533804329027073433528001080020160020533807811800211091080010100009502012411153359160000105338153381533815338153381