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

MOVI (vector, 4S)

Test 1: uops

Code:

  movi v0.4s, #3

(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)031e3f51schedule 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)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
1004288204025100010001000700026928828812331461000100028828811100110000073116112851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000073116112851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000073116112851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000073116112851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000073116112851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000073116112851000289289289289289
1004288304025100010001000700026928828812331461000100028828811100110000073116112851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000073116112851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000073116112851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110001073116112851000289289289289289

Test 2: throughput

Count: 8

Code:

  movi v0.4s, #3
  movi v1.4s, #3
  movi v2.4s, #3
  movi v3.4s, #3
  movi v4.4s, #3
  movi v5.4s, #3
  movi v6.4s, #3
  movi v7.4s, #3

(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)09l2 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)696b6d6emap 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)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)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420060155000000040258010010080000100800005005600002001902008920241997339996801002008000020020038200381180201100991001008000010000000330511021622200350800001002003920039200392003920039
8020420038155000000040258010010080000100800005005600002001902003820038997339996801002008000020020038200381180201100991001008000010000000600511021622200350800001002003920039200392003920039
80204200381550000000135258010010080000100800005005600002001902003820038997339996801002008000020020038200381180201100991001008000010000000870511021622200350800001002003920039200392003920039
8020420038155000000040258010010080000100800005005600002001902003820038997339996801002008000020020038200381180201100991001008000010000000900511021622200350800001002003920039200392003920039
802042003815500000004025801001008000010080000500560000200190200382003899733999680100200800002002003820038118020110099100100800001000000000511021622200350800001002003920039200392003920039
802042003815500000004025801001008000010080000500560000200190200382003899733999680100200800002002003820038118020110099100100800001000000000511021622200350800001002003920039200742003920039
802042003815500000004025801001008000010080000500560000200190200382003899733999680100200800002002003820038118020110099100100800001000000000511021622200350800001002003920039200392003920039
8020420038155000000040258010010080000100800005005600002001902003820038997339996801002008000020020038200381180201100991001008000010000000900511021622200350800001002003920039200392003920039
8020420038156000000040258010010080000100800005005600002001902003820038997339996801002008000020020038200381180201100991001008000010000000840511021622200350800001002003920039200392003920039
8020420038155000000040258010010080000100800005005600002001902003820038997339996801002008000020020038200381180201100991001008000010000000780511021622200350800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)0318191e1f3f51schedule 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)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)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242004015500003925800101080000108000050560000020019200382003899963100188001020800002020038200381180021109101080000100000950206165520035080000102003920039200392003920039
800242003815600003925800101080000108000050560000120019200382003899963100188001020800002020038200381180021109101080000100000050206166520035080000102003920039200392003920039
800242003815600003925800101080000108000050560000120019200382003899963100188001020800002020038200381180021109101080000100000050206164520035080000102003920039200392003920039
800242003815500006025800101080000108000050560000120019200382003899963100188001020800002020038200381180021109101080000100003050206165420035080000102003920039200392003920039
800242003815500003925800101080000108000050560000120019200382003899963100188001020800002020038200381180021109101080000100000050205165620035080000102003920039200392003920039
800242003815600003925800101080000108000050560000120019200382003899963100188001020800002020038200381180021109101080000100000050206166520035080000102003920039200392003920039
800242003815500003925800101080000108000050560000120019200382003899963100188001020800002020038200381180021109101080000100000050205165520035080000102003920039200392003920039
800242003815600003925800101080000108000050560000120019200382003899963100188001020800002020038200381180021109101080000100000050205167720035080000102003920039200392003920039
800242003815500003925800101080000108000050560000120019200382003899963100188001020800002020038200381180021109101080000100000050207165720035080000102003920039200392003920039
800242003815500003925800101080000108000050560000120019200382003899963100188001020800002020038200381180021109101080000109010050206165620035080000102003920039200392003920039