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, 8H, lsl)

Test 1: uops

Code:

  movi v0.8h, #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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
10042882040251000100010007000126928828812331461000100028828811100110000073416332851000289289289289289
10042882040251000100010007000126928828812331461000100028828811100110000073316332851000289289289289289
10042882040251000100010007000126928828812331461000100028828811100110000073316332851000289289289289289
10042882040251000100010007000126928828812331461000100028828811100110000073316322851000289289289289289
10042882040251000100010007000126928828812331461000100028828811100110000073316332851000289289289289289
10042882040251000100010007000126928828812331461000100028828811100110000073316322851000289289289289289
10042883040251000100010007000126928828812331461000100028828811100110000073316332851000289289289289289
10042882040251000100010007000126928828812331461000100028828811100110000073316332851000289289289289289
10042883040251000100010007000126928828812331461000100028828811100110000073316322851000289289289289289
10042882040251000100010007000126928828812331461000100028828811100110000073316332851000289289289289289

Test 2: throughput

Count: 8

Code:

  movi v0.8h, #3, lsl #8
  movi v1.8h, #3, lsl #8
  movi v2.8h, #3, lsl #8
  movi v3.8h, #3, lsl #8
  movi v4.8h, #3, lsl #8
  movi v5.8h, #3, lsl #8
  movi v6.8h, #3, lsl #8
  movi v7.8h, #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)03mmu table walk data (08)l2 tlb miss data (0b)18191e1f3f51schedule 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 tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)a9acc2branch 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
8020420060156000000402580100100800001008000050056000020019200382003899733999680100200800002002003820038118020110099100100800001000000000000511021622200350800001002003920039200392003920039
8020420038155000000402580100100800001008000050056000020019200382003899733999680100200800002002003820038118020110099100100800001000000000000511021622200350800001002003920039200392003920039
8020420038155000000402580100100800001008000050056000020019200382003899733999680100200800002002003820038118020110099100100800001000000000000511021622200350800001002003920039200392003920039
8020420038155000000402580100100800001008000050056000020019200382003899733999680100200800002002003820038118020110099100100800001000000000111511811600200350800001002003920039200392003920039
8020420038155000000292580108100800081008002050056012820019200382003899776998980120200800322002003820038118020110099100100800001000000000111511801600200350800001002003920039200392003920039
8020420038155000000292580108100800081008002050056012820019200382003899776998980120200800322002003820038118020110099100100800001000000000000511021622200350800001002003920039200392003920039
8020420038155000000402580100100800001008000050056000020019200382003899733999680100200800002002003820038118020110099100100800001000000000000511021622200350800001002003920039200392003920039
80204200381560000264884025801001138009211380192500560000200192009020038998313999680100200801952002014120090118020110099100100800001000000000000511022722200350800001002003920039200392003920141
8020420038156100000402580100100800001008000050056000020019200382003899733999680406200800002002003820038118020110099100100800001000000000000511021622200350800001002003920039200392003920039
802042003815500431320402580100100800001008000050056000020019200382003899733999680100200800002002009320144118020110099100100800001000000000000511031622200760800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03191e1f3f51schedule 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 cache writeback (a8)accfl1i cache miss demand (d3)d5map dispatch bubble (d6)d9daddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420039155000392580010108000010800005056000012001920038200389996310018800102080000202003820038118002110910108000010005020021600812003580000102003920039200392003920039
8002420038155000392580010108000010800005056000012001920038200389996310018800102080000202003820038118002110910108000010005020011600512003580000102003920039200392003920039
8002420038155000392580010108000010800005056000012001920038200389996310018800102080000202003820038118002110910108000010005020011600312003580000102003920039200392003920039
8002420038155000392580010108000010800005056000002001920038200389996310018800102080000202003820038118002110910108000010005020011600612003580000102003920039200392003920039
8002420038155000392580010108000010800005056000012001920038200389996310018800102080000202003820038118002110910108000010005020011600512003580000102003920039200392003920039
80024200381560003925800101080000108000050560000020019200382003899963100188001020800002020038200381180021109101080000101050200116001012003580000102003920039200392003920039
8002420038155000392580010108000010800005056000002001920038200389996310018800102080000202003820038118002110910108000010065020011600112003580000102003920039200392003920039
8002420038155000392580010108000010800005056000002001920038200389996310018800102080000202003820038118002110910108000010005020011600112003580000102003920039200392003920039
8002420038155000392580010108000010800005056000002001920038200389996310018800102080000202003820038118002110910108000010105020011600112003580000102003920039200392003920039
8002420038155000392580010108000010800005056000002001920038200389996310018800102080000202003820038118002110910108000010005020011600112003580000102003920039200392003920039