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, S)

Test 1: uops

Code:

  fmov s0, #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)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
1004288204025100010001000700026928828812331461000100028828811100110000073116012851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000073116022851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000073216022851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000073116212851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000073116012851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000073216012851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000073216012851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110001073116012851000289289289289289
10042882124025100010001000700026928828812331461000100028828811100110000073116122851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000073116012851000289289289289289

Test 2: throughput

Count: 8

Code:

  fmov s0, #1.0
  fmov s1, #1.0
  fmov s2, #1.0
  fmov s3, #1.0
  fmov s4, #1.0
  fmov s5, #1.0
  fmov s6, #1.0
  fmov s7, #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)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)9fld unit uop (a6)l1d cache writeback (a8)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042004816100000082258010010080000100800005005600000020019200382003899733999680100200800002002003820038118020110099100100800001000000511021611200350800001002003920039200392003920039
8020420038161000012061258010010080000100800005005600000020019200382003899733999680100200800002002003820038118020110099100100800001000000511011621200350800001002003920039200392003920039
802042003816100000040258010010080000100800005205600000020019200382003899733999680100200800952002003820038118020110099100100800001000030511011613200350800001002003920039200392003920089
8020420038161000000922580100100800001008000050056000000200192003820038997339996802202008000020020038200381180201100991001008000010000005110116212003512800001002003920345202982003920039
8020420038160000012040258010010080000100800005005600000020019200382003899733999680100200800002002003820038118020110099100100800001000000511011621200350800001002003920039200392003920039
802042003816100000096258010010080000100800005005600000020019200382003899733999680100200800002002003820038118020110099100100800001000000511021612200350800001002003920039200392003920039
8020420038160000012068258010010080000100800005005600000020019200382003899733999680100200800002002003820038118020110099100100800001000000511011611200350800001002003920039200392003920039
802042003816100000040258010010080000100800005005600000020019200382003899733999680100200800002002003820038118020110099100100800001000100511021612200350800001002003920039200392003920039
802042003816100000040258010010080000100800005005600000020019200382003899733999680100200800002002003820038118020110099100100800001000130511011611200350800001002003920039200392003920039
802042003816100000040258010010080000100800005005600000020019200382003899733999680100200800002002003820038118020110099100100800001000000511011612200350800001002003920039200392003920039

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)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
8002420047161000000157258001010800001080000505600001200192003820038999631001880010208000020200382003811800211091010800001000000050207167620035080000102003920039200392003920039
800242003816100000081258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000000050207166520035080000102003920039200392003920039
8002420038161000000556258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000003050206166620035080000102003920039200392003920039
8002420038161000012039258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000100250206166520035080000102003920039200392003920039
800242003816100000039258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000000050206166620035080000102003920039200392003920039
8002420038161000000116258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000100050206166620035080000102003920091200392003920039
80024200381610000132039258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000000050205166620035080000102003920039200392003920039
8002420038161000000635648010511801881280193555606700201002008820089100147100728020920800002020089201373180021109101080000102202935050385266420113180000102014020039200922014220090
800242008716211122648839258001010800001080000505600000200192003820038999631001880010208000020200382003821800211091010800001000100050206165720074080000102008820039200392003920039
8002420038161001000333448001010800001080000505600000200572003820038999631001880010208000020200892003811800211091010800001000006050206165620035080000102003920039200392003920039