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 (scalar, B)

Test 1: uops

Code:

  uqshl b0, b0, b1
  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)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)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100420371506116872510001000100026468020182037203715723189510001000200020372037111001100000094116111787100020382038203820382038
100420371566116872510001000100026468020182037203715723189510001000200020372037111001100000073116111787100020382038203820382038
1004203715010316872510001000100026468020182037203715723189510001000200020372037111001100000073116111787100020382038203820382038
100420371506116872510001000100026468020182037203715723189510001000200020372037111001100003073116111787100020382038203820382038
100420371506116872510001000100026468020182037203715723189510001000200020372037111001100000073116111787100020382038203820382038
100420371606116872510001000100026468020182037203715723189510001000200020372037111001100000073116111787100020382038203820382038
100420371506116872510001000100026468020182037203715723189510001000200020372037111001100003073116111787100020382038203820382038
100420371506116872510001000100026468020182037203715723189510001000200020372037111001100000073116111787100020382038203820382038
100420371506116872510001000100026468020182037203715723189510001000200020372037111001100000073116111787100020382038203820382038
100420371606116872510001000100026468020182037203715723189510001000200020372037111001100003073116111787100020382038203820382038

Test 2: Latency 1->2

Code:

  uqshl b0, b0, b1
  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)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)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)9fl1d cache writeback (a8)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020420037150061196872510100100100001001000050028476802001820037200371842231874510100200100002002000020037200371110201100991001001000010000071011612197910100001002003820038200382003820038
10204200371500145196872510100100100001001000050028476802001820037200371842231874510100200100002002000020037200371110201100991001001000010000071011611197910100001002003820038200382003820038
1020420037150061196872510100100100001001000050028476802001820037200371842231874510100200100002002000020037200371110201100991001001000010013071011611197910100001002003820038200382003820038
1020420037150061196872510100100100001001000050028476802001820037200371842231874510100200100002002000020037200371110201100991001001000010000071011611197910100001002003820038200382003820038
10204200371500128196872510100100100001001000050028476802001820037200371842231874510100200100002002000020037200371110201100991001001000010000071011611197910100001002003820038200382003820038
1020420037150061196872510100100100001001000050028476802001820037200371842231874510100200100002002000020037200371110201100991001001000010000071011611197910100001002003820038200382003820038
1020420037150061196872510100100100001001000050028476802001820037200371842231874510100200100002002000020037200371110201100991001001000010000071011611197910100001002003820038200382003820038
10204200371502182196872510100100100001001000050028476802001820037200371842231874510100200100002002000020037200371110201100991001001000010000071011611197910100001002003820038200382003820038
1020420037150061196872510100100100001001000050028476802001820037200371842231874510100200100002002000020037200371110201100991001001000010000071011611197910100001002003820038200382003820038
1020420037150061196872510100100100001001000050028476802001820037200371842231874510100200100002002000020037200371110201100991001001000010000071011611197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03mmu table walk data (08)l2 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)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)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024200371500000003401968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000000006403162219785010000102003820038200382003820038
1002420037150000000711968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000000006402162219785010000102003820038200382003820038
1002420037150000000611968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000000006402162219785010000102003820038200382003820038
10024200371500000001451968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000000306402162219785010000102003820038200382003820038
1002420037150000000611968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000000006402162219785010000102003820038200382003820038
1002420037150000000611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000000006402162219785010000102003820038200382003820038
1002420037150000000611968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000000006402162219785010000102003820038200382003820038
10024200371500000001111968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000000006402162219785010000102003820038200382003820038
10024200371500000001721968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000010006402162219785010000102003820038200382003820038
1002420037150001118009661966543100231110024111030455284896302009020084200861844891880310163221016920206742008520085211002110910101000010024004224026833323219824110000102008620086200852008620085

Test 3: Latency 1->3

Code:

  uqshl b0, b1, b0
  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)03mmu table walk data (08)09l2 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)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204200371500000000023719687251010010010000100100005002847680020018200372003718422318745101002001000020020000200372003711102011009910010010000100000000071011611197910100001002003820038200382003820038
1020420037150000000006119687251010010010000100100005002847680020018200372003718422318765101002001000020020000200372003711102011009910010010000100000000071011611197910100001002003820038200852003820038
1020420037150000000006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000000071011611197910100001002003820038200382003820038
10204200371500000000024319687251010010010000100100005002847680020018200372003718422318745101002001000020020000200372003711102011009910010010000100000100071011611197910100001002003820038200382003820038
10204200371500000000028119687251010010010000100100005002847680020018200372003718422318745101002001000020020000200372003711102011009910010010000100000000071011611197910100001002003820038200382003820038
1020420037150000000006119687251010010010000100100005002847680020018200372003718422318745101002001000020020000200372003711102011009910010010000100000200071011611197910100001002003820038200382003820038
1020420037150000000006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000000071011611197910100001002003820038200382003820038
1020420037150000000006119687251010010010000100100005002847680020018200372003718422318745101002001000020020000200372003711102011009910010010000100000000071011611197910100001002003820038200382003820038
10204200371500000000053619687251010010010000100100005002847680020018200372003718422318745101002001000020020000200372003711102011009910010010000100000000071011611197910100001002003820038200382003820038
1020420037150000000006119687251010010010000100100005002847680020018200372003718422318745101002001000020020000200372003711102011009910010010000100000000071011611197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

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)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 tlb access (a0)l1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)a9acc2branch mispred nonspec (cb)cfd0d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024200371500000000145196872510010101000010100005028476801220018200372003718444318767100102010000202000020037200371110021109101010000100000000064003163319785010000102003820038200382003820038
1002420037150000000082196872510010101000010100005028476800220018200372003718444318767100102010000202000020037200371110021109101010000100000000064003163419785010000102003820038200382003820038
10024200371500000000145196872510010101000010100005028476801220018200372003718444318767100102010180202000020037200371110021109101010000100000000064003163419785010000102003820038200382003820038
1002420037150000000061196872510010101000010100005028476800020018200372003718444318767100102010000202000020037200371110021109101010000100000000064023163419785010000102003820038200382003820038
10024200371500000000124196872510010101000010100005028476800020018200372003718444318767100102010000202000020037200371110021109101010000100000000064003163319785010000102003820038200382003820038
10024200371500000000726196872510010101000010100005028476800220018200372003718444318767100102010000202000020037200371110021109101010000100000000064023163419785010000102003820038200382003820038
1002420037150000000061196872510010101000010100005028476801020018200372003718444318767100102010000202000020037200371110021109101010000100000000064023163419785010000102003820038200382003820038
1002420037150000000061196872510010101000010100005028476801020018200372003718444318767100102010000202000020037200371110021109101010000100000000064003163319785010000102003820038200382003820038
1002420037150000000061196872510010101000010100005028476800020018200372003718444318767100102010000202000020037200371110021109101010000100000000064003163319785010000102003820038200382003820038
1002420037150000000061196872510010101000010100005028476800020018200372003718444318767100102010000202000020037200371110021109101010000100000000064003163319785010000102003820038200382003820038

Test 4: throughput

Count: 8

Code:

  uqshl b0, b8, b9
  uqshl b1, b8, b9
  uqshl b2, b8, b9
  uqshl b3, b8, b9
  uqshl b4, b8, b9
  uqshl b5, b8, b9
  uqshl b6, b8, b9
  uqshl b7, b8, b9
  movi v8.16b, 9
  movi v9.16b, 10

(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)03mmu table walk data (08)l2 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? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042005815000000050258010810080008100800205006401320200192003820038997769989801202008003220016006420038200381180201100991001008000010000100111511801600200350800001002003920039200392003920039
802042003815000000071258010810080008100800205006401320200192003820038997769989801202008003220016006420038200381180201100991001008000010000002111511801600200350800001002003920039200392003920039
802042003815000001202452580108100800081008002050064013212001920038200389977610070801202008032720016006420038200381180201100991001008000010000000111511801600200770800001002003920039200392003920039
8020420038150000000291028010810080008100800205006401321200192003820038997769989801202008003220016006420038200381180201100991001008000010000100111511801600200350800001002003920039200392003920039
8020420038150000012029258010810080008100800205006401320200192003820038997769989801202008003220016006420038200381180201100991001008000010000000000511011621200350800001002003920039200392003920039
80204200381500000120402580100100800001008000050064000012001920038200389973310077801002008000020016000020038200381180201100991001008000010000000000511011611200350800001002003920039200392003920039
802042003815000000040258010010080000100800005006400000200612003820038997339996801002008000020016000020038200381180201100991001008000010000000000511011611200350800001002009920039200392003920039
802042003815000000040258010010080000100800005006400001200192003820038997339996801002008000020016000020038200381180201100991001008000010000000000511011611200350800001002003920039200392003920039
8020420038150000012040258010010080000100800005006400001200192003820038997339996801002008000020016000020038200381180201100991001008000010000000000511011611200350800001002003920039200392003920039
8020420038149000039040258010010080000100800005006400000200192003820038997339996801002008000020016000020038200381180201100991001008000010000000000511011611200350800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03l2 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)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)9fcfd5map dispatch bubble (d6)d9ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200471500039258001010800001080000506400002001920038200389996310018800102080000201600002003820038118002110910108000010502041612222003580000102003920039200392003920039
80024200381500039258001010800001080000506400002001920038200389996310018800102080000201600002003820038118002110910108000010502011610112003580000102003920039200392003920039
80024200381500039258001010800001080000506400002001920038200389996310018800102080000201600002003820038118002110910108000010502011610122003580000102003920039200392003920039
80024200381500039258001010800001080000506400002001920038200389996310018800102080000201600002003820038118002110910108000010502011610222003580000102003920039200392003920039
80024200381500014825800101080000108000050640000200192003820038999631001880010208000020160000200382003811800211091010800001050201168212003580000102003920039200392003920039
80024200381500039258001010800001080000506400002001920038200389996310018800102080000201600002003820038118002110910108000010502011610212003580000102003920039200392003920039
80024200381500039258001010800001080000506400002001920038200389996310018800102080000201600002003820038118002110910108000010502011610112003580000102003920039200392003920039
8002420038150003925800101080000108000050640000200192003820038999631001880010208000020160000200382003811800211091010800001050201168212003580000102003920039200392003920039
80024200381500041925800101080000108000050640000200192003820038999631001880010208000020160000200382003811800211091010800001050201168112003580000102003920039200392003920039
8002420038150003925800101080000108000050640000200192003820038999631001880010208000020160000200382003811800211091010800001050201168222003580000102003920039200392003920039