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, H)

Test 1: uops

Code:

  fmov h0, #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)cfmap dispatch bubble (d6)dde0? simd retires (ee)f5f6f7f8fd
1004288204025100010001000700026928828812331461000100028828811100110000731602851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000731602851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000731602851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000731602851000289289289289289
1004288304025100010001000700026928828812331461000100028828811100110000731602851000289289289289289
1004288264025100010001000700026928828812331461000100028828811100110000731602851000289289289289289
1004288205125100010001000700026928828812331461000100028828811100110000731602851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000731602851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000731602851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000731602851000289289289289289

Test 2: throughput

Count: 8

Code:

  fmov h0, #1.0
  fmov h1, #1.0
  fmov h2, #1.0
  fmov h3, #1.0
  fmov h4, #1.0
  fmov h5, #1.0
  fmov h6, #1.0
  fmov h7, #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)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 cache writeback (a8)a9acc2cfd2d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420367161100100004025801001008000010080096500560000002031420038200389973399968010020080097200200382003811802011009910010080000100010005110021645200350800001002003920039200392003920039
8020420038155101000240122625801001008000010080000500560000002001920038200389973399968010020080000200200382003811802011009910010080000100010305112021644200350800001002003920039200392003920039
8020420038155000000908425801001008000010080000500560000002001920038200389973399968010020080000200200382003811802011009910010080000100020005112041634200350800001002003920039200392003920039
80204200381551010001204225801001008000010080000500560000002001920038200389973399968010020080000200200382003811802011009910010080000100010005110051623200350800001002003920039200392003920039
8020420038155101000004225801001248000010080000521560000002006020038200389973399968010020080000200200382003811802011009910010080000100010005112031644200350800001002003920039200392003920039
80204200381560010000042258010010080000100800005005600000020019200382003899733999680100200800002002003820038118020110099100100800001000001505112031652200350800001002003920039200392003920039
80204200381550010001204225801001008000010080000500560000002001920038200389973399968010020080000200200382003811802011009910010080000100030005110021642200350800001002003920039200392003920039
8020420038156101000004125801001008000010080000625560000002001920038200389973399968010020080000200200382003811802011009910010080000100030305112031631200350800001002003920039200392003920039
8020420086155001000904125801001008000010080000500560000002001920038200389973399968010020080000200200382003811802011009910010080000100000005112031631200350800001002003920039200392003920039
802042003815610100000414580100100800001008000050056000000200192003820038997339996801002008000020020038200381180201100991001008000010003046505112031642200350800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03mmu table walk instruction (07)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)l1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)a9acc2branch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)eb? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420047161000008839458001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000000000502091658200350080000102003920039200392003920039
80024200381610000301026280010108000010800005056000002001920038200389996310018800102080000202003820038118002110910108000010000103005020816510200350080000102003920039200392003920039
8002420038161000030229258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000000000502081685200350080000102003920039200392003920039
8002420038161000012039258001010800001080000565600000200192003820038999631001880010208000020200382003811800211091010800001000010000502081685200350080000102003920039200392003920039
8002420038161000012067258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000000000502091698200350080000102003920039200392003920039
8002420038161000012081258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000010000502082885200350080000102003920039200392003920039
8002420038161000012039258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000000300502081658200350080000102003920039200392003920039
800242003816100001208125800101080000108000050560000020019200382003899963100188001020800002020038200381180021109101080000100000047500502081685200350080000102003920039200392003920039
8002420038161000000109258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000010300502051695200350080000102003920039200392003920039
80024200381610000150725258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000000000502081695200350080000102003920039200392003920039