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

FMOV (scalar, immediate, D)

Test 1: uops

Code:

  fmov d0, #1.0

(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)03mmu table walk instruction (07)1e3a3f51schedule 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)accfmap dispatch bubble (d6)e0? simd retires (ee)f5f6f7f8fd
100428821014025100010001000700026928828812331461000100028828811100110000073162851000289289289289289
100428830004025100010001000700026928828812331461000100028828811100110000073162851000289289289289289
100428831004025100010001000700026928828812331461000100028828811100110000073162851000289289289289289
100428821004025100010001000700026928828812331461000100028828811100110000073162851000289289289289289
100428830004025100010001000700026928828812331461000100028828811100110000073162851000289289289289289
100428821904025100010001000700026928828812331461000100028828811100110000073162851000289289289289289
100428831004025100010001000700026928828812331461000100028828811100110000073162851000289289289289289
100428821005425100010001000700026928828812331461000100028828811100110000073162851000289289289289289
100428831004025100010001000700026928828812331461000100028828811100110000073162851000289289289289289
100428831004025100010001000700026928828812331461000100028828811100110000073162851000289289289289289

Test 2: throughput

Count: 8

Code:

  fmov d0, #1.0
  fmov d1, #1.0
  fmov d2, #1.0
  fmov d3, #1.0
  fmov d4, #1.0
  fmov d5, #1.0
  fmov d6, #1.0
  fmov d7, #1.0

(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 instruction (07)mmu table walk data (08)l2 tlb miss instruction (0a)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)696d6emap 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)st unit uop (a7)l1d cache writeback (a8)a9acc2branch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420059161000000004025801001008000010080000500560000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511011611200350800001002003920039200392003920039
8020420038161000000004025801001008000010080000500560000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511011611200350800001002003920039200392003920039
8020420038161000000004025801001008000010080000500560000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511011611200350800001002003920039200392003920039
80204200381601000003306125801001008000010080000500560000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511011611200350800001002003920039200392003920039
8020420038161100000304025801001008000010080000500560000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511011611200350800001002003920039200392003920039
80204200381611000001204025801001008000010080000500560000200192003820038997339996801002008000020020038200381180201100991001008000010000000300511011611200350800001002003920039200392003920039
8020420038161000000006125801001008000010080000500560000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511011611200350800001002003920039200392003920039
80204200381611000000070525801001008000010080000500560000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511011611200350800001002003920039200392003920039
8020420038161100000004045802091218009512080096500560000200572003820088997339996801002028000020020038200381180201100991001008000010000000000511011611200350800001002003920039200392003920039
80204200381610000002404025801001008000010080000500560000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511011611200350800001002003920039200392003920039

1000 unrolls and 10 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)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 tlb access (a0)l1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)a9acbranch mispred nonspec (cb)cfd2d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242004716100000093258001010800001080000505600000020019200382003899963100188001020800002020038200381180021109101080000100000051050200131613620035080000102003920039200392003920039
800242003816100000081258001010800001080000505600000020019200382003899963100188001020800002020038200381180021109101080000100000000502001316131320035080000102003920039200392003920039
80024200381610000003925800101080000108000050560000002001920038200389996310018800102080000202003820038118002110910108000010000100050200616131320035080000102003920039200392003920039
80024200381610000003925800101080000108000050560000002001920038200389996310018800102080000202003820038118002110910108000010000000050200131681320035080000102003920039200392003920039
80024200381610000303925800101080000108000050560000002001920038200389996310018800102080000202003820038118002110910108000010000000050200716141420035080000102003920039200392003920039
80024200381600000152643925800101080000108000050560000002001920038200389996310018800102080000202003820038118002110910108000010000000050200616111220035080000102003920039200922003920039
800242003816100000039258001010800001080000505600000020019200382003899963100188001020800002020038200381180021109101080000100000000502001316121320035080000102003920039200392003920039
80024200381610000008125800101080000108000050560000002001920038200389996310018800102080000202003820038118002110910108000010000000050200131613620035080000102003920039200392003920039
800242003816000000039258001010800001080000505600000020019200382003899963100188001020800002020038200381180021109101080000100001000502001416131320035080000102003920039200392003920039
80024200381600000003925800101080000108000050560000002001920038200389996310018800102080000202003820038118002110910108000010000000050200131613620035080000102003920039200392003920039