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

SADDL2 (vector, 4S)

Test 1: uops

Code:

  saddl2 v0.4s, v0.8h, v1.8h
  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)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
100420371506116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371506116872510001000100026468002018203720371572318951000100020002037203711100110001073216221787100020382038203820382038
100420371508216872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371506116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371506116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
1004203715126116872510001000100026468002018203720371572318951000100020002037203711100110000673216221787100020382038203820382038
100420371506116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371506116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371506116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371506116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038

Test 2: Latency 1->2

Code:

  saddl2 v0.4s, v0.8h, v1.8h
  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)1e3f4e51schedule 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 miss (a1)acbranch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715013557196872510100105100001051015250028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001002216007101161119825100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715001261196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715002161196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715001561196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715000441196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101241119791100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03191e3f4e51schedule 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)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002420037150006119687251001010100001010000502847680200182003720037184443187671001020100002020000200372003711100211091010100001006403163319785010000102003820038200382003820038
10024200371500017019687251001010100001010000502847680200182003720037184443187671001020100002020000200372003711100211091010100001006403163319785010000102003820038200382003820038
1002420037150006119687251001010100001010000502847680200182003720037184443187671001020100002020000200372003711100211091010100001006403163319785010000102003820038200382003820038
10024200371500014719687251001010100001010000502847680200182003720037184443187671001020100002020000200372003711100211091010100001006403163319785110000102003820038200382003820038
1002420037150006119687431001011100001010000502847680200182003720037184443187671001020100002020000200372003711100211091010100001006403163319785010000102003820038200382003820038
1002420037150006119687251001010100001010000502847680200182003720037184443187671001020100002020000200372003711100211091010100001006403163319785010000102003820038200382003820038
10024200371500012619687251001010100001010000502847680200182003720037184443187671001020100002020000200372003711100211091010100001006403163319785010000102003820038200382003820038
100242003715000122319687251001010100001010000502847680200182003720037184443187671001020100002020000200372003711100211091010100001006403163319785010000102003820038200382003820038
1002420037150006119687251001010100001010000502847680200182003720037184443187671001020100002020000200372003711100211091010100001006403243319785010000102003820038200382003820038
1002420037150006119687251001010100001010000602847680200182003720037184443187671001020100002020000200372003711100211091010100001006403163319785010000102003820038200382003820038

Test 3: Latency 1->3

Code:

  saddl2 v0.4s, v1.8h, v0.8h
  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)033f4e51schedule 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)9faccdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715061196872510100100100001001000050028476800200182003720037184223187651010020010000200200002003720037111020110099100100100001000071021622197910100001002003820038200382003820038
1020420037149214196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000071021622197910100001002003820038200382003820038
102042003715061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000071021622197910100001002003820038200382003820038
1020420037150170196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000071021622197910100001002003820038200382003820038
10204200371501261968725101001001000010010000500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010000712216221979112100001002003820038200382003820038
102042003715061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000071021622197910100001002003820038200382003820038
102042003715084196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000071021622197910100001002003820038200382003820038
102042003715061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000071021622197910100001002003820038200382003820038
102042003715061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000071021622197910100001002003820038200382003820038
102042003715084196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000071021622198980100001002003820038200382003820038

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)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002420037150000611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000640716541978510000102003820038200382003820038
1002420037150000611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000640516541978510000102003820038200382003820038
1002420037150000611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010004640516451982310000102003820038200382003820038
1002420037150000611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000640516551978510000102003820038200382003820038
1002420037150000611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000640516541978510000102003820038200382003820038
1002420037150000611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000640450451978510000102003820038200382003820038
10024200371500006211967625100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000640516551978510000102003820038200382003820038
1002420084150110611968725100101010000101000050284896312001820037200371844431876710010201000020200002003720037111002110910101000010000640416541978510000102008520038200382003820038
100242003715000156611968725100101010012101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000640516551978510000102003820038200382003820038
1002420037150000611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000640516551978510000102003820038200382003820038

Test 4: throughput

Count: 8

Code:

  saddl2 v0.4s, v8.8h, v9.8h
  saddl2 v1.4s, v8.8h, v9.8h
  saddl2 v2.4s, v8.8h, v9.8h
  saddl2 v3.4s, v8.8h, v9.8h
  saddl2 v4.4s, v8.8h, v9.8h
  saddl2 v5.4s, v8.8h, v9.8h
  saddl2 v6.4s, v8.8h, v9.8h
  saddl2 v7.4s, v8.8h, v9.8h
  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)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)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
8020420060150000004025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000000000511021611200350800001002003920039200392003920039
802042003815000000386625801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000000000511011612200350800001002003920039200392003920039
8020420038150000004025801251258000012580000500640000020019200382003899733999580100200800002001600002003820038118020110099100100800001000000030511011611200350800001002003920039200392003920039
8020420038150000004025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000000000511011611200350800001002003920039200392003920039
8020420038150000004025801001008000010080000500640000020019200382003899733999580125200800002001600002003820038118020110099100100800001000000000511011621200350800001002003920039200392003920039
8020420038151000003925801001008000010080000500640000020019200382003899733999580100200800002001600002003820038118020110099100100800001000000000511011611200350800001002003920039200392003920039
80204200381500000022925801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000000000511011611200350800001002003920039200392003920039
8020420038150000004025801001008000010080000590640000120019200382003899733999580100200800002001600002008520038118020110099100100800001000000000511011711200350800001002003920039200392003920039
8020420038150000004025801001008000010080000626640000020019200382003899733999580100200800002001600002003820038118020110099100100800001000000000511011611200350800001002003920039200392003920039
8020420038149000004025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000000100511011611200350800001002003920039200392003920039

1000 unrolls and 10 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)5f60696d6emap 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
80024200391500000003925800101080000108000050640000002001920038200389996310018800102080000201600002003820038118002110910108000010000000050202216171720035080000102003920039200392003920039
80024200381500000003925800101080000108000050640000002001920038200389996310018800102080000201600002003820038118002110910108000010000000050201516181420035080000102003920039200392003920039
80024200381500000003925800101080000108000050640000002001920038200389996310018800102080000201600002003820038118002110910108000010000000050201516171520035080000102003920039200392003920039
80024200381500000003948800101080000108000050640000002001920038200389996310018800102080000201600002003820038118002110910108000010000000050201816181820035080000102003920039200392003920039
80024200381500000003925800101080000108000050640000002001920038200389996310018800102080000201600002003820038118002110910108000010000000050201816151820035080000102003920039200392003920039
80024200381500000003925800101080000108000050640000002001920038200389996310018800102080000201600002003820038118002110910108000010000000050201716171720035080000102003920039200392003920039
80024200381500000003925800101080000108000050640000002001920038200389996310018800102080000201600002003820038118002110910108000010000000050201816171720035080000102003920039200392003920039
80024200381500000003925800101080000108000050640000002001920038200389996310018800102080000201600002003820038118002110910108000010000000050201916181520035080000102003920039200392003920039
80024200381500000003925800101080000108000050640000002001920038200389996310018800102080000201600002003820038118002110910108000010000000050201816151820035080000102003920039200392003920039
80024200381500000003925800101080000108000050640000002001920038200389996310018800102080000201600002003820038118002110910108000010000000050201816151820035080000102003920039200392003920039