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, 64-bit, 2D)

Test 1: uops

Code:

  movi v0.2d, #0xff00

(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)033f51schedule 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
1004288240251000100010007000126928828812331461000100028828811100110000073116112851000289289289289289
1004288240251000100010007000126928828812331461000100028828811100110000073116112851000289289289289289
1004288240251000100010007000126928828812331461000100028828811100110000073116112851000289289289289289
1004288240251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
1004288240251000100010007000126928828812331461000100028828811100110000073116112851000289289289289289
1004288240251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
1004288240251000100010007000126928828812331461000100028828811100110000073116112851000289289289289289
1004288240251000100010007000126928828812331461000100028828811100110000073116112851000289289289289289
1004288240251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
1004288340251000100010007000126928828812331461000100028828811100110000073116112851000289289289289289

Test 2: throughput

Count: 8

Code:

  movi v0.2d, #0xff00
  movi v1.2d, #0xff00
  movi v2.2d, #0xff00
  movi v3.2d, #0xff00
  movi v4.2d, #0xff00
  movi v5.2d, #0xff00
  movi v6.2d, #0xff00
  movi v7.2d, #0xff00

(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)03l2 tlb miss data (0b)191e3f51schedule 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)9fl1d tlb access (a0)l1d cache writeback (a8)acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042003815500040258010010080000100800005005600002001920038200899973399968010020080000200200382003811802011009910010080000100000000511021622200350800001002003920039200392003920039
802042003815500040258010010080000100800005005600002001920038200389973399968010020080098200200382003811802011009910010080000100000000514621622200350800001002003920039200392003920039
802042003815500082258010010080000100800005005600002001920038200389973399968010020080000200200382003811802011009910010080000100000000511021622200350800001002003920039200392003920039
802042003815500040258010010080000100800005005600002001920038200389973399968010020080000200200382003811802011009910010080000100000000511021622200350800001002003920039200912003920039
802042003815600040258010010080000100800005005600002001920038200389973399968010020080000200200382003811802011009910010080000100000000511021622200350800001002003920039200392003920039
802042003815500040258010010080000100800005005600002001920038200389973399968010020080000200200882003811802011009910010080000100000000511021622200350800001002003920039200392003920039
802042003815500061258030712180000100800005005600002001920038200389973399968010020080000200200382003811802011009910010080000100000000511054400200350800001002003920039200392003920039
802042003815600029258010810080008100800205005601282009720038200389987699898033620280032200200382003811802011009910010080000100000111511801600200350800001002003920039200392003920039
802042003815600029258010810080008100800205005601282001920038200389977699898012020080032200200382003811802011009910010080000100010111511801600200350800001002003920039200392003920039
8020420038155003409258010810080008100800205005601282001920038200389977699898012020080032200200382003811802011009910010080000100200111511802800200350800001002003920039200392003920039

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)mmu table walk data (08)l2 tlb miss data (0b)181e1f3f5051schedule 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 cache writeback (a8)a9acc2branch cond mispred nonspec (c5)branch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0ea? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420040155000000390258001010800001080000505600001200192003820038999631001880010208000020200382003811800211091010800001000000005020101664200353680000102003920039200392003920039
800242003815500000039025800101080000108000050560000120019200382003899963100188001020800002020038200381180021109101080000100000200502061612520035080000102003920039200392003920039
80024200381550000003902580010108000010800005056000002001920038200389996310018800102080000202003820038118002110910108000010000000050206166620035080000102003920039200392003920039
800242003815631000039025800101080000108000050560000020019200382003899963100188001020800002020038200381180021109101080000100103000502061641020035080000102003920039200392003920039
8002420038155000000683025800101080000108000050560000120019200382003899963100188001020800002020038200381180021109101080000100000000502041651020035080000102003920039200392003920039
800242003815600000081025800101080000108000050560000120019200382003899963100188001020800002020038200381180021109101080000100000000502011166520035080000102003920039200392003920039
80024200381550010003902580010108000010800005056000012001920038200389996310018800102080000202003820038118002110910108000010000000050566166520035080000102003920039200392003920039
800242003815600000039025800101080000108000050560000120019200382003899963100188001020800002020038200381180021109101080000100001195000502041655200352080000102003920039200392003920039
80024200381550000003902580010108000010800005056000002001920038200389996310018800102080000202003820038118002110910108000010000114000502051651120035080000102003920039200392003920039
80024200381550000003902580010108000010800005056000012001920038200389996310018800102080000202003820038118002110910108000010000000050204164920035080000102003920039200392003920039