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, 2D)

Test 1: uops

Code:

  fmov v0.2d, #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
1004288294025100010001000700026928828812331461000100028828811100110000073116002851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000073016002851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000373016012851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000073016002851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000073016102851000289289289289289
1004288206125100010001000700026928828812331461000100028828811100110000373016112851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000073116012851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000073016012851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000373016002851000289289289289289
1004288204025100010001000700026928828812331461000100028828811100110000073016102851000289289289289289

Test 2: throughput

Count: 8

Code:

  fmov v0.2d, #1.0
  fmov v1.2d, #1.0
  fmov v2.2d, #1.0
  fmov v3.2d, #1.0
  fmov v4.2d, #1.0
  fmov v5.2d, #1.0
  fmov v6.2d, #1.0
  fmov v7.2d, #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)l2 tlb miss instruction (0a)18191e1f3a3f5051schedule 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)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
80204201101611100630118002580207100800001008000050056000020019200382003899733999680100200800002002003820038118020110099100100800001000000512841643200730800001002034520039200392003920039
8020420038161110090127202580100100800001008000050056000020019200382003899733999680100200800002002003820038118020110099100100800001000030511241633200350800001002003920039200392003920039
8020420038155110000119902580100100800001008000050056000020019200382003899733999680100200800002002003820038118020110099100100800001000030511231643200350800001002003920039200392003920039
8020420038156110030112602580100100800001008000050056000020019200382003899733999680100200800002002003820038118020110099100100800001000100511241634200350800001002003920039200392003920039
8020420038156110027019002580100100800001008000050056000020019200382003899733999680100200800002002003820038118020110099100100800001000000511241633200350800001002003920039200392003920039
8020420038155110018014802580100124800001008000050056000020019200382003899733999680100200800002002003820038118020110099100100800001000030511231643200350800001002003920039200392003920039
8020420038157110036016902580100100800001008000050056000020019200382003899733999680100200800002002003820038118020110099100100800001000030511231633200350800001002003920039200392003920039
8020420038155210030014802580100100800001008000050056000020019200382003899733999680100200800002002003820038118020110099100100800001000100511231644200350800001002003920039200392003920039
8020420038155110030014802580100100800001008000050056000020019200382003899733999680100200800002002003820038118020110099100100800001000100511231633200350800001002003920039200392003920039
802042003815511000108148200222580100100800001008000050056000020019200382003899733999680100200800002002003820038118020110099100100800001000230511231643200350800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03l2 tlb miss instruction (0a)l2 tlb miss data (0b)18191e1f3a3f51schedule 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)696b6d6emap 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)acb5c2cfl1i tlb miss demand (d4)d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200471610000990039258001010800001080000505600002001902003820038999631001880010208000020200382003811800211091010800001000001000502001816353520035080000102003920039200392003920039
80024200381610000480039258001010800001080000505600002001902003820038999631001880010208000020200382003811800211091010800001000000300502003316353220035080000102003920039200392003920039
80024200381610000180039258001010800001080000505600002001902003820038999631001880010208000020200382003811800211091010800001000000000502001716351620035080000102003920039200392003920039
8002420038161000000081258001010800001080000505600002001902003820038999631001880010208000020200382003811800211091010800001000000000502003316341720073080000102003920039200912003920039
80024200381610000120081258001010800001080000505600002001902003820038999631001880010208000020200382003811800211091010800001000000000502003416163820035080000102003920039200392003920039
80024200381610000000123258001012800001080000505600002001902003820038999631001880010208000020200382003811800211091010800001000000300502001616363520035080000102003920039200392003920039
8002420038161000000039258001010800001080000505600002001902003820038999631001880010208000020200382003811800211091010800001000000000502004016163720035080000102004220088200392003920039
8002420038161000012003925800101080000108000050560000200190200382003899963100188001020800002020038200381180021109101080000100000147600502001716174120035080000102003920039200392003920039
80024200381610000120039258001010800001080000505600002001902003820038999631001880010208009720200382003811800211091010800001000001300502003516413920035080000102003920039200392003920039
80024200381610000120039258010510800001080000505600002001902003820038999631001880010208000020200382003811800211091010800001000001300502003616343320035080000102003920039200392003920039