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, 64-bit, D)

Test 1: uops

Code:

  movi d0, #0xff00

(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
10042882040251000100010007000026928828812331461000100028828811100110000073216222851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073216222851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073216222851000289289289289289
10042882061251000100010007000026928828812331461000100028828811100110000073216222851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000373216222851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073216222851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073216222851000289289289289289
10042883040251000100010007000026928828812331461000100028828811100110000073216222851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073216222851000289289289289289
100428821240251000100010007000026928828812331461000100028828811100110000073216222851000289289289289289

Test 2: throughput

Count: 8

Code:

  movi d0, #0xff00
  movi d1, #0xff00
  movi d2, #0xff00
  movi d3, #0xff00
  movi d4, #0xff00
  movi d5, #0xff00
  movi d6, #0xff00
  movi d7, #0xff00

(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)0309l2 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)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)acbranch 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
8020420058155000000029258010810080008100800205005601280200192003820038997769989801202008003220020038200381180201100991001008000010000111511801600200350800001002003920039200392003920039
8020420038155000000029258010810080008100800205005601281200192003820038997739996801002008000020020038200381180201100991001008000010000000511021622200350800001002003920039200392003920039
8020420038155000000040258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000511021622200350800001002003920039200392003920039
8020420038155000000040258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000511021622200350800001002003920039200392003920039
8020420038155000000040258010010080000100800005005600001200192003820038997339996801002008000020020038200381180201100991001008000010000000511021622200350800001002003920039200392003920039
8020420038155000000040258010010080000100800005005600001200192003820038997339996801002008000020020038200381180201100991001008000010000000511021622200350800001002003920039200392003920039
8020420038155000000040258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000511021622200350800001002003920039200392003920039
8020420038156000000040258010010080000100800005005600001200192003820038997339996801002008000020020038200381180201100991001008000010000000511021622200350800001002003920039200392003920039
8020420038156000000040258010010080000100800005005600001200192003820038997339996802152008000020020038200381180201100991001008000010000000511021622200350800001002003920039200392003920039
8020420038155000000040258010010080000100800005005600001200192003820038997339996801002008000020020038200381180201100991001008000010000000511021622200350800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03191e3a3f51schedule 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 cache writeback (a8)cfl1i cache miss demand (d3)d5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200391550003925800101080000108000050560000200190200382003899963100188001220800002020038200381180021109101080000100050201116112003580000102003920039200392003920039
80024200381550003925800101080000108000050560000200190200382003899963100188001020800002020038200381180021109101080000100050200116112003580000102003920039200392003920039
80024200381550003925800101080000108000050560000200190200382003899963100188001020800002020038200381180021109101080000100050200116112003580000102003920039200392003920039
80024200381560003925800101080000108000050560000200190200382003899963100188001020800002020038200381180021109101080000100050200116112003580000102003920039200392003920039
80024200381550003925800101080000108000050560000200190200382003899963100188001020800002020038200381180021109101080000100050200116112003580000102003920039200392003920039
80024200381550003925800101080000108000050560000200190200382003899963100188001020800002020038200381180021109101080000100050200116112003580000102003920039200392003920039
80024200381550003925800101080000108000050560000200190200382003899963100188001020800002020038200381180021109101080000100050200116112003580000102003920039200392003920039
800242003815600051425800101080000108000050560000200190200382003899963100188001020800002020038200381180021109101080000100050200116112003580000102003920039200392003920039
80024200381550003925800101080000108000050560000200190200382003899963100188001020800002020038200381180021109101080000100050200116112003580000102003920039200392003920039
80024200381550003925800101080000108000050560000200190200382003899963100188001020800002020038200381180021109101080000100050200116112003580000102003920039200392008820039