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

MVNI (vector, 4H, lsl)

Test 1: uops

Code:

  mvni 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
10042882040251000100010007000126928828812331461000100028828811100110001073116112851000289289289289289
10042882940251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000373116112851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
10042883040251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289

Test 2: throughput

Count: 8

Code:

  mvni v0.4h, #3, lsl #8
  mvni v1.4h, #3, lsl #8
  mvni v2.4h, #3, lsl #8
  mvni v3.4h, #3, lsl #8
  mvni v4.4h, #3, lsl #8
  mvni v5.4h, #3, lsl #8
  mvni v6.4h, #3, lsl #8
  mvni 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)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)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)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
80204200601550000001262580100100800001008000050056000012001920038200389973399968010020080000200200382003811802011009910010080000100000000511021622200350800001002003920039200392003920039
8020420038155000090402580100100800001008000050056000002001920038200389973399968010020080000200200382003811802011009910010080000100000000511021622200350800001002003920039200392003920039
8020420038155000000402580100100800001008000050056000002001920038200389973399968010020080000200200382003811802011009910010080000100000000511021622200350800001002003920039200392003920039
8020420038155000000402580100100800001008000050056000002001920038200389973399968010020080000200200382003811802011009910010080000100000000511021622200350800001002003920039200392003920039
80204200381550000001052580100100800001008000050056000002001920038200389973399968010020080000200200382003811802011009910010080000100000000511021622200350800001002003920039200392003920039
80204200381550000001032580100100800001008000050056000012001920038200389973399968010020080000200200382003811802011009910010080000100000000511021622200350800001002003920039200392003920039
8020420038156000000402580100100800001008000050056000002001920038200389973399968010020080000200200382003811802011009910010080000100000000511021622200350800001002003920039200392003920039
8020420038156000030682580100100800001008000050056000002001920038200389973399968010020080000200200382003811802011009910010080000100000000511021622200350800001002003920039200392003920039
8020420038155000000432580100100800001008000050056000002001920038200389973399968010020080000200200382003811802011009910010080000100000000511021622200350800001002003920039200392003920039
8020420038155000000452580100100800001008000050056000002001920038200389973399968010020080000200200382003811802011009910010080000100000030511011622200350800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)031e3f51schedule 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)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? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420048155041425800101080000108000050560000052001920038200389996310018800102080000202003820038118002110910108000010105020516662003580000102003920039200392003920039
8002420038155024325800101080000108000050560000152001920038200389996310018800102080000202003820038118002110910108000010105020616662003580000102003920039200392003920039
800242003815506025800101080000108000050560000002001920038200389996310018800102080000202003820038118002110910108000010005020716782003580000102003920039200392003920039
8002420038155026725800101080000108000050560000002001920038200389996310018800102080000202003820038118002110910108000010105020616782003580000102003920039200392003920039
8002420038155123925800101080000108000050560000102001920038200389996310018800102080000202003820038118002110910108000010105020616662003580000102003920039200392003920039
8002420038156123925800101080000108000050560000102001920038200389996310018800102080000202003820038118002110910108000010005020616772003580000102003920039200392003920039
80024200381551226725800101080000108000050560000102001920038200389996310018800102080000202003820038118002110910108000010005020616672003580000102003920039200392003920039
8002420038155017125800101080000108000050560000102001920038200389996310018800102080000202003820038118002110910108000010005020616782003580000102003920039200392003920039
8002420038155010625800101080000108000050560000102001920038200389996310018800102080000202003820038118002110910108000010005020716872003580000102003920039200392003920039
800242003815603925800101080000108000050560000102001920038200389996310018800102080000202003820038118002110910108000010105020716782003580000102003920039200392003920039