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 (vector, immediate, 4H)

Test 1: uops

Code:

  fmov v0.4h, #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)031e3f51schedule 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)accfd5map dispatch bubble (d6)e0? simd retires (ee)f5f6f7f8fd
10042882040251000100010007000269288288123314610001000288288111001100000730162851000289289289289289
10042882040251000100010007000269288288123314610001000288288111001100000730162851000289289289289289
10042882040251000100010007000269288288123314610001000288288111001100000730162851000289289289289289
10042882040251000100010007000269288288123314610001000288288111001100000730162851000289289289289289
10042883040251000100010007000269288288123314610001000288288111001100000730162851000289289289289289
10042882061251000100010007000269288288123314610001000288288111001100000730162851000289289289289289
10042882040251000100010007000269288288123314610001000288288111001100000730162851000289289289289289
10042882040251000100010007000269288288123314610001000288288111001100000730162851000289289289289289
10042882040251000100010007000269288288123314610001000288288111001100000730162851000289289289289289
10042882040251000100010007000269288288123314610001000288288111001100000730162851000289289289289289

Test 2: throughput

Count: 8

Code:

  fmov v0.4h, #1.0
  fmov v1.4h, #1.0
  fmov v2.4h, #1.0
  fmov v3.4h, #1.0
  fmov v4.4h, #1.0
  fmov v5.4h, #1.0
  fmov v6.4h, #1.0
  fmov v7.4h, #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 data (08)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)9fld 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
8020420038161000004025801001008000010080000500560000102001920038200389973310021801002008000020020038200891180201100991001008000010000000512811611200350800001002004220039200392003920039
8020420038161000007052580100100800001008000050056000000200192003820038997339996801002008000020020038200381180201100991001008000010000402511011611200350800001002009020039200392003920039
8020420038161000004025801001008000010080000500560000002001920038200389973310022801002008000020020089200381180201100991001008000010000000511011611200350800001002003920039200392003920039
802042009116100000402580174100800001008000061556000000200192003820038997339996801002008000020020038200381180201100991001008000010000000511031611200350800001002003920039200392003920039
802042003816010000402580100100800001008000050056000000200192003820038997339996802062008000020020038200381180201100991001008000010000000511011611200350800001002009420039200392003920039
802042003816100000402580100100800001008000050056000000200192003820038997339996801002008009920020038200381180201100991001008000010000000511021611200350800001002003920039200392003920039
802042003816100000402580100100800001008000050056000000200192003820038997339996801002008000020020038200381180201100991001008000010000000511011611200350800001002003920039200392003920039
802042003816000000402580100100800001008000050056000000200192003820038997339996801002008000020020038200381180201100991001008000010000000511011611200350800001002003920039200392003920039
802042003816100000402580100100800001008000050056000000200192003820038997339996801002008000020020038200381180201100991001008000010000000511021611200350800001002003920039200392003920039
802042003816100000402580203100800921228000050656067500200192003820038997339996801992008000020020038200381180201100991001008000010000000511011611200350800001002003920039200392003920039

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)09l2 tlb miss data (0b)0e18191e1f3f51schedule 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)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)eaeb? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242004816000030000392580010108000010800005056000002001920038200389996310018800102080000202003820038118002110910108000010000100050206164620035002680000102003920039200392003920039
800242003816000000012060258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000000005020416442003500080000102003920039200392003920039
80024200381610000000039258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000000005020716552003500680000102003920039200392003920039
8002420038161000000150392580010128000010800005056000002001920038200389996310018800102080195202003820038118002110910108000010000000050204164720035003080000102003920039200392003920039
800242003816100000000787258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000000005020516452003500080000102003920039200392003920039
800242003816000000000268258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000000305020416352003500080000102003920039200392003920039
80024200381610000000039258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000010305020416452003500080000102003920039200392003920039
80024200381610000000039258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000000005020416642003500080000102003920039200392003920039
8002420038160000000006025800101080000108000050560000020019200382003899963100188001020800002020038200381180021109101080000100000047005020916462003500080000102003920039200392003920039
800242003816100000090732258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000000005020716862003500080000102003920039200392003920039