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, 4S, lsl)

Test 1: uops

Code:

  mvni v0.4s, #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)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100428820402510001000100070001269288288123314610001000288288111001100073116112851000289289289289289
100428820402510001000100070001269288288123314610001000288288111001100073116112851000289289289289289
100428820402510001000100070001269288288123314610001000288288111001100073116112851000289289289289289
100428820402510001000100070001269288288123314610001000288288111001100073116112851000289289289289289
100428830402510001000100070001269288288123314610001000288288111001100073116112851000289289289289289
100428820402510001000100070001269288288123314610001000288288111001100073116112851000289289289289289
1004288212402510001000100070001269288288123314610001000288288111001100073116112851000289289289289289
100428820402510001000100070001269288288123314610001000288288111001100073116112851000289289289289289
100428830402510001000100070001269288288123314610001000288288111001100073116112851000289289289289289
100428820402510001000100070001269288288123314610001000288288111001100073116112851000289289289289289

Test 2: throughput

Count: 8

Code:

  mvni v0.4s, #3, lsl #8
  mvni v1.4s, #3, lsl #8
  mvni v2.4s, #3, lsl #8
  mvni v3.4s, #3, lsl #8
  mvni v4.4s, #3, lsl #8
  mvni v5.4s, #3, lsl #8
  mvni v6.4s, #3, lsl #8
  mvni v7.4s, #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)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)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)st unit uop (a7)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420060156000000040258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000001000511021622200350800001002003920039200392003920039
8020420038155000000040258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511021622200350800001002003920039200392003920039
8020420038155000000040258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511021622200350800001002003920039200392003920039
8020420038155000000040258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511021622200350800001002003920039200392003920039
802042003815500000174061258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511021622200350800001002003920039200392003920039
8020420038155000000040258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511021622200350800001002003920039200392003920039
8020420038155000000040258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511021622200350800001002003920039200392003920039
8020420038155000000040258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511021622200350800001002003920039200392003920039
8020420038155000000040258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511021622200350800001002003920039200392003920039
8020420038155000000040258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511021622200350800001002003920039200392003920039

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)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)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)9fld unit uop (a6)l1d cache writeback (a8)accfd5map dispatch bubble (d6)d9ddfetch restart (de)e0ec? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242003915503925800101080000108000050560000112001920038200389996310018800102080000202003820038118002110910108000010000502051606520035080000102003920039200392003920039
800242003815503925800101080000108000050560000002001920038200389996310018800102080000202003820038118002110910108000010000502061607720035080000102003920039200392003920039
8002420038155021025800101080000108000050560000002001920038200389996310018800102080000202003820038118002110910108000010000502051605720035080000102003920039200392003920039
800242003815503925800101080000108000050560000002001920038200389996310018800102080000202003820038118002110910108000010010502051606520035080000102003920039200392003920039
800242003815503925800101080000108000050560000102001920038200389996310018800102080000202003820038118002110910108000010000502051605520035080000102003920039200392003920039
8002420038155067258001010800001080000505600000020019200382003899963100188001020800002020038200381180021109101080000100005020716076200356580000102003920039200392003920039
8002420038155153925800101080000108000050560000002001920038200389996310018800102080000202003820038118002110910108000010000502071606520035080000102003920039200392003920039
800242003815503925800101080000108000050560000002001920038200389996310018800102080000202003820038118002110910108000010000502061605720035080000102003920039200392003920039
800242003815603925800101080000108000050560000102001920038200389996310018800102080000202003820038118002110910108000010000502061606520035080000102003920039200392003920039
800242003816703925800101080000108000050560000002001920038200389996310018800102080000202003820038118002110910108000010000502071605620035080000102003920039200392003920039