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, 4H)

Test 1: uops

Code:

  movi v0.4h, #3

(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)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
10042882040251000100010007000269288288123314610001000288288111001100073216112851000289289289289289
10042882040251000100010007000269288288123314610001000288288111001100073116112851000289289289289289
10042882040251000100010007000269288288123314610001000288288111001100073116112851000289289289289289
10042882040251000100010007000269288288123314610001000288288111001100073116112851000289289289289289
10042882040251000100010007000269288288123314610001000288288111001100073116112851000289289289289289
10042882040251000100010007000269288288123314610001000288288111001100073116112851000289289289289289
10042882040251000100010007000269288288123314610001000288288111001100073116112851000289289289289289
10042882040251000100010007000269288288123314610001000288288111001100073116112851000289289289289289
10042882040251000100010007000269288288123314610001000288288111001100073116112851000289289289289289
10042882340251000100010007000269288288123314610001000288288111001100073116112851000289289289289289

Test 2: throughput

Count: 8

Code:

  movi v0.4h, #3
  movi v1.4h, #3
  movi v2.4h, #3
  movi v3.4h, #3
  movi v4.4h, #3
  movi v5.4h, #3
  movi v6.4h, #3
  movi v7.4h, #3

(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)03181e3f51schedule 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)9fld unit uop (a6)l1d cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042003815600402580100100800001008000050056000002001920038200389973399968010020080000200200382003811802011009910010080000100042951102162220035800001002003920039200392003920039
802042003815600402580100100800001008000050056000012001920038200389973399968010020080000200200382003811802011009910010080000100000651102162220035800001002003920039200392003920039
802042003816103402580773100800001008000050056000002001920038200389973399968010020080000200200382003811802011009910010080000100000051102162220035800001002003920039200392003920039
80204200381560040258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010003901551102162220035800001002003920039200392003920039
802042003815500402580100100800001008000050056000002001920038200389973399968010020080000200200382003811802011009910010080000100000051102162220035800001002003920039200392003920039
802042003815500402580100100800001008000050056000002001920038200389973399968010020080000200200382003811802011009910010080000100000651102162220035800001002003920039200392003920039
802042003815500402580100100800001008000050056000002001920086200389973399968010020080000200200382003811802011009910010080000100010351102162220035800001002003920039200392003920039
802042003815500402580100100800001008000050056000002001920038200389973399968010020080000200200382003811802011009910010080000100010051102162220035800001002003920039200392003920039
8020420038155004025801001008000010080000500560000020019200382003899733999680100200800002002003820038118020110099100100800001000101251102162220035800001002003920039200392003920039
802042003815600402580100100800001008000050056000012001920038200389973399968010020080000200200382003811802011009910010080000100080051102162220035800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03l1i tlb fill (04)mmu table walk instruction (07)mmu table walk data (08)09l2 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)696d6emap 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 access (a0)l1d tlb miss (a1)ld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)dbddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242004715600000000000392580010108000010800005056000020019200382024299960310018800102080000202003820038118002110910108000010000000150502022160242420035080000102003920039200392003920039
80024200381610000000000039258001010800001080000505600002001920038200389996031001880010208000020200382003811800211091010800001000003090502025160252520035080000102003920039200392003920039
80024200381610000000052800392580010108000010800005056000020019200382003899960310018800102080000202003820038118002110910108000010000000780502027160262620035080000102003920039200392003920039
800242003816000000000000392580010108000010800005056000020019200382003899960310018800102080000202003820038118002110910108000010000000210502012160271620035080000102003920039200392003920039
80024200381600000000000039258001010800001080000505600002001920038200389996031001880010208000020200382003811800211091010800001000004000502016160271620035080000102003920039200392003920039
800242003816100000000000392580010108000010800005056000020019200382003899960310018800102080000202003820038118002110910108000010000000720502026160152720035080000102003920039200392003920039
80024200381610000000000039258001010800001080000505600002001920038200389996031001880010208000020200382003811800211091010800001000000060502017160272720035080000102003920039200392003920039
80024200381610120000000001016258001010800001080000505600002001920038200389996031001880010208000020200382003811800211091010800001000006030502025160202520035080000102003920039200392004220039
800242003816100000000000392580010108000010800005056000020019200382003899960310018800102080000202003820038118002110910108000010000000390502028160152520035080000102003920039200392003920039
80024200381610000000000039258001010800001080000505600002001920038200389996031001880010208000020200382003811800211091010800001000001030502027160152720035080000102003920039200392003920039