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

MVNI (vector, 4S)

Test 1: uops

Code:

  mvni v0.4s, #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)03183f51schedule 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
10042882040251000100010007000026928828812331461000100028828811100110000073216222851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073216222851000289289289289289
10042882040251000100010007000126928828812331461000100028828811100110000073216222851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073216222851000289289289289289
10042882040251000100010007000126928828812331461000100028828811100110000073216222851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073216222851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073216222851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073216222851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073216222851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073216222851000289289289289289

Test 2: throughput

Count: 8

Code:

  mvni v0.4s, #3
  mvni v1.4s, #3
  mvni v2.4s, #3
  mvni v3.4s, #3
  mvni v4.4s, #3
  mvni v5.4s, #3
  mvni v6.4s, #3
  mvni v7.4s, #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)9fl1d tlb access (a0)l1d tlb miss (a1)ld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)acc2branch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200471550940258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511041644200350800001002003920039200392003920039
80204200381550040258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000001000511041644200350800001002003920039200392003920039
80204200381550068258010010080000100800005005600001200192003820038997339996801002008000020020038200381180201100991001008000010000000000511041644200350800001002003920039200392003920039
802042003815600230258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511041644200350800001002003920039200392003920039
80204200381550040258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000300511041644200350800001002003920039200392003920039
80204200381550040258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000301511041644200350800001002003920039200392003920039
802042003815501240258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511041644200350800001002003920039200392003920039
80204200381550040258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000300511041644200350800001002003920039200392003920039
80204200381560040258010010080000100800005005600000200192003820038997339996801002008000020020038200381180201100991001008000010000000000511041644200350800001002003920039200392003920039
80204200381560040258010010080000100800005005600001200192003820038997339996801002008000020020038200381180201100991001008000010000000000511041644200350800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03l2 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)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)accfl1i cache miss demand (d3)d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)eaebec? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420048155000000812580010108000010800005056000002001920038200389996310018800102080000202003820038118002110910108000010010502001161120035000080000102003920039200392003920039
8002420038155000000392580010108000010800005056000002001920038200389996310018800102080000202003820038118002110910108000010000502001161120035000080000102003920039200392003920039
8002420038155000000392580010108000010800005056000012001920038200389996310018800102080000202003820038118002110910108000010020502001161120035000080000102003920039200392003920039
8002420038155000000392580010108000010800005056000002001920038200389996310018800102080000202003820038118002110910108000010000502001161120035000080000102003920039200392003920110
80024200381550001202392580010108000010800005056000002001920038200389996310018800102080000202003820038118002110910108000010003502001161120035000080000102003920039200392003920039
8002420038156000000392580010108000010800005056000002001920038200389996310018800102080000202003820038118002110910108000010000502001161120035000080000102003920039200392003920039
8002420038156000000442580010108000010800005056000002001920038200389996310018800102080000202003820038118002110910108000010000502001161120035000080000102003920039200392003920039
8002420038155000000392580010108000010800005056000012001920038200389996310018800102080000202003820038118002110910108000010000502001161120035000080000102003920039200392003920039
8002420038155000000392580010108000010800005056000002001920038200389996310018800102080000202003820038118002110910108000010000502001161120035000080000102003920039200392003920039
80024200381550000007042580010108000010800005056000002001920038200389996310018800102080000202003820038118002110910108000010000502001161120035000080000102003920039200392003920039