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

MOVI (vector, 4S, lsl)

Test 1: uops

Code:

  movi v0.4s, #3, lsl #8

(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)60696d6emap 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)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
1004288204025100010001000700012692882881233146100010002882881110011000073216222851000289289289289289
1004288204025100010001000700002692882881233146100010002882881110011000073216222851000289289289289289
1004288204925100010001000700012692882881233146100010002882881110011000073216222851000289289289289289
1004288294025100010001000700002692882881233146100010002882881110011000073216222851000289289289289289
1004288304025100010001000700002692882881233146100010002882881110011000073216222851000289289289289289
1004288304025100010001000700012692882881233146100010002882881110011000073216222851000289289289289289
1004288204025100010001000700002692882881233146100010002882881110011000073216222851000289289289289289
1004288204025100010001000700012692882881233146100010002882881110011000073216222851000289289289289289
1004288204025100010001000700012692882881233146100010002882881110011000073216222851000289289289289289
1004288204025100010001000700012692882881233146100010002882881110011000073216222851000289289289289289

Test 2: throughput

Count: 8

Code:

  movi v0.4s, #3, lsl #8
  movi v1.4s, #3, lsl #8
  movi v2.4s, #3, lsl #8
  movi v3.4s, #3, lsl #8
  movi v4.4s, #3, lsl #8
  movi v5.4s, #3, lsl #8
  movi v6.4s, #3, lsl #8
  movi v7.4s, #3, lsl #8

(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)03191e3a3f51schedule 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)simd prf full (72)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 miss (a1)ld unit uop (a6)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200381500004025801001008000010080000500560000020019200382003899730399968010020080000200200382003811802011009910010080000100000051104163520035800001002003920039200392003920039
80204200381500004025801001008000010080000500560000120019200382003899730399968010020080000200200382003811802011009910010080000100000051105165320035800001002003920039200392003920039
80204200381500004025801001008000010080000500560000120019200382003899730399968010020080000200200382003811802011009910010080000100002951106165620035800001002003920039200392003920039
8020420038150024040258010010080000100800005005600001200192003820038997303999680100200800002002003820038118020110099100100800001000024051106166320035800001002003920039200392003920039
80204200381500004025801001008000010080000500560000020019200382003899730399968010020080000200200382003811802011009910010080000100000051105165520035800001002003920039200392003920039
80204200381500004025801001008000010080000500560000020019200382003899730399968010020080000200200382003811802011009910010080000100000051105165520035800001002003920039200392003920039
80204200381500004025801001008000010080000500560000020019200382003899730399968010020080000200200382003811802011009910010080000100000651105165520035800001002003920039200392003920039
80204200381490004025801001008000010080000500560000020019200382003899730399968010020080000200200382003811802011009910010080000100001651105165320035800001002003920039201122003920039
80204200381500004025801001008000010080000500560000020019200382003899730399968010020080000200200382003811802011009910010080000100003951106165520035800001002003920039200392003920039
80204200381500004025801001008000010080000500560000020019200382003899730399968010020080000200200382003811802011009910010080000100000351106165520035800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)0318191e1f3f51schedule 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)9faccfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200481550096039258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001005020316222003580000102003920039200392003920039
80024200381560084039258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001005020216222003580000102003920039200392003920039
8002420038156000039258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001005020216222003580000102003920039200392003920039
80024200381550075039258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001005020216222003580000102003920039200392003920039
8002420038155000039258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001005020216222003580000102003920039200392003920039
8002420038156000039258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001005020316222003580000102003920039200392003920039
8002420038155000060258001010800001080000555600001200192003820038999631001880010208000020200382003811800211091010800001035020216222003580000102003920039200392003920039
800242003815500303039258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001005020216222003580000102003920039200392003920039
8002420038155003930392580010108000010800005056000002001920038200381000931001880010208000020200382003811800211091010800001005020216222003580000102003920039200392003920039
800242003815500354039258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001005020316222003580000102003920039200392003920039