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

UQSHL (immediate, vector, 4S)

Test 1: uops

Code:

  uqshl v0.4s, v0.4s, #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)03mmu table walk data (08)1e3f4e51schedule 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)inst simd alu (9a)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
1004203715001701686251000100010002645212018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
100420371506611686251000100010002645212018203720371571318951000100010002037203711100110000073116111860100020382038203820382038
100420371500611686251000100010002645212018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
100420371500611686251000100010002645212018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
1004203715015611686251000100010002645212018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
100420371500611686251000100010002645212018203720371571318951000100010002037203711100110000073124111786100020382038203820382038
100420371500611686251000100010002645212018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
100420371503611686251000100010002645212018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
100420371500611686251000100010002645212018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
100420371500611686251000100010002645212018203720371571318951000100010002037203711100110000073116111786100020382038203820382038

Test 2: Latency 1->2

Code:

  uqshl v0.4s, v0.4s, #3
  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03l2 tlb miss data (0b)18191e1f3f4e51schedule 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)9facc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042027915215689752861196862510100100100001001000050028475210200182003720037184210318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
102042003715000024061196862510100100100001001000050028475210200182003720037184217318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037150000489061196862510100100100001001000050028475210200182003720037184210318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
10204200371500000061196862510137100100001001000050028475210200182003720037184210318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
102042003715000000215196862510100100100001001000050028475211200182003720037184210318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
10204200371500000061196862510100100100001001000050028475211200182003720037184210318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
10204200371500000061196862510100100100001001000050028475211200182003720037184210318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
10204200371500000061196862510100100100001001000050028475210200182003720037184210318745101002001000020010000200372003711102011009910010010000100027101161119791100001002003820038200382003820038
102042003715000021061196862510100100100001001000050028475211200182003720037184210318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
102042003715000021061196862510100100100001001000050028475211200182003720037184210318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)0318191e3f4e51schedule 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002420037150001861196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001010640216221978610000102003820038200382003820038
100242003715000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
100242003715000061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
100242003715000061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
10024200371500058261196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
100242003715000061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
1002420037150003061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
1002420037150006553196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
100242003715000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
100242003715000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  uqshl v0.4s, v8.4s, #3
  uqshl v1.4s, v8.4s, #3
  uqshl v2.4s, v8.4s, #3
  uqshl v3.4s, v8.4s, #3
  uqshl v4.4s, v8.4s, #3
  uqshl v5.4s, v8.4s, #3
  uqshl v6.4s, v8.4s, #3
  uqshl v7.4s, v8.4s, #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)03l2 tlb miss data (0b)18191e1f3f51schedule 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)acc2branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420059151000120292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000000011151181161120035800001002003920039200392003920039
802042003815000000292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000000011151181161120035800001002003920039200392003920039
802042003815000000292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000000011151181161120035800001002003920039200392003920039
802042003815000000292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000000011151181161120035800001002003920039200392003920039
802042003814900000292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000000411151181161120035800001002003920039200392003920039
8020420038150000150292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000000011151181161120035800001002003920039200392003920039
802042003815000000292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000000011151181161120035800001002003920039200392003920039
8020420038155000001282580180100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000000011151181161120035800001002003920039200392003920039
802042003815000000292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000000011151181161120035800001002003920039200392003920039
802042003815000000292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000000011151181161120035800001002003920039200392003920039

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)mmu table walk data (08)l2 tlb miss instruction (0a)l2 tlb miss data (0b)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)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)a9acc2cfd2d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420050150000000300039258001010800001080097506400001200192003820038100043100188001020800002080000200902009111800211091010800001000000000502001616171220035080000102003920039200392003920039
8002420038150000000000392580010108000010800005064000012001920099200389996310018801092080000208000020038200381180021109101080000100000006050200716171720035080000102003920039200392003920039
8002420038150000000000392580010108000010800005064000012001920038200389996310018800102080000208000020038200381180021109101080000100000000050200171617620035080000102003920039200392003920039
8002420038150000000000354258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010000000005020081617820035080000102003920039200392003920039
80024200381500000000009201228038510804671280487506430941201702028220238100402510124804042080486208048720289202386180021109101080000102200022340051050157281420190080000102029520289202452028620295
800242029215201014539944019631178047510804681080484506438361202132028620288100411610151804972080483208048420290200387180021109101080000102420122088050200181661720035080000102003920039200902003920039
800242003815000000018001077118804801080557108048761643816120215202442028410040261015280496208048822800002024120286618002110910108000010000104468251060187381720229080000102034520394203402039520394
8002420340153210176951528011831578038010806551080582506438681202872034220349100473410208805972080682208058420411203887180021109101080000101000022805051240102891320419180000102044520444204942039420447
80024202421582021875557040403258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010007002281025140059792120035080000102003920039200392003920039
8002420038156000079118835202024161805741080559108068350644612120019200382003810012310018800102080099208000020038200871180021109101080000100000023753050200835171420082080000102034420538203002044420293