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, 4H, lsl)

Test 1: uops

Code:

  movi v0.4h, #3, lsl #8

(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)60696d6emap 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
10042882040251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
10042882045251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289

Test 2: throughput

Count: 8

Code:

  movi v0.4h, #3, lsl #8
  movi v1.4h, #3, lsl #8
  movi v2.4h, #3, lsl #8
  movi v3.4h, #3, lsl #8
  movi v4.4h, #3, lsl #8
  movi v5.4h, #3, lsl #8
  movi v6.4h, #3, lsl #8
  movi v7.4h, #3, lsl #8

(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)0f18191e1f3a3f51schedule 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)ld unit uop (a6)l1d cache writeback (a8)a9aaacc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042005815500000000149258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000030511021622200350800001002003920039200392003920039
80204200381550000000040258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000020000511021622200350800001002003920039200392003920039
802042003815600000000230258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511021622200350800001002003920039200392003920039
802042003815500000000635258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511021622200350800001002003920039200392003920039
802042003815600000120063258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511021622200350800001002003920039200392003920039
802042003815500000000302258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511021622200350800001002003920039200392003920039
802042003815500000000759258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511021622200350800001002003920039200392003920039
802042003815500000000235258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511021622200350800001002003920039200392003920039
80204200381560000000040258010010080000100800005005600000200192003820038997339996801002008009720020038200381180201100991001008000010000000000511021622200350800001002003920039200392003920039
80204200381560040000082258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511021622200350800001002003920039200392003920039

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)l2 tlb miss instruction (0a)l2 tlb miss data (0b)181e1f3a3f51schedule 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 cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242004715511000014725800101080000108000050560000120019200382003899963100188001020800002020038200381180021109101080000100050222163320035080000102003920039200392003920039
8002420038155110000181325800101080000108000050560000020019200382003899963100188001020800002020038200381180021109101080000100050223162320035080000102003920039200392003920039
8002420038155110000191525800101080000108000050560000020019200382003899963100188001020800002020038200381180021109101080000100050223163320035080000102003920039200392003920039
8002420038155110000193925800101080000108000050560000120019200382003899963100188001020800002020038200381180021109101080000100050223163320035080000102003920039200392003920039
8002420038155110000193425800101080000108000050560000120019200382003899963100188001020800002020038200381180021109101080000100050223163220035080000102003920039200392003920039
8002420038155110000192025800101080000108000050560000120019200382003899963100188001020800002020038200381180021109101080000100050222163320035080000102003920039200392003920039
800242003815511000014725800101080000108000050560000120019200382003899963100188001020800002020038200381180021109101080000100050222163320035080000102003920039200392003920039
800242003815511000014725800101080000108000050560000120019200382003899963100188001020800002020038200381180021109101080000100050223163320035080000102003920039200392003920039
8002420038156110000115425800101080000108000050560000120019200382003899963100188001020800002020038200381180021109101080000100050223163320035080000102003920039200392003920039
800242003815511000014525800101080000108000050560000120019200382003899963100188001020800002020038200381180021109101080000100050223163320035080000102003920039200392003920039