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, 2S, lsl)

Test 1: uops

Code:

  movi v0.2s, #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)031e1f3f51schedule 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
100428820040251000100010007000126928828812331461000100028828811100110000073316222851000289289289289289
100428820040251000100010007000026928828812331461000100028828811100110000073216222851000289289289289289
100428820040251000100010007000026928828812331461000100028828811100110000073216222851000289289289289289
100428820040251000100010007000126928828812331461000100028828811100110000073216222851000289289289289289
100428820040251000100010007000126928828812331461000100028828811100110001073216222851000289289289289289
100428820040251000100010007000026928828812331461000100028828811100110000073216222851000289289289289289
100428820040251000100010007000126928828812331461000100028828811100110000073216222851000289289289289289
1004288212040251000100010007000126928828812331461000100028828811100110000073216222851000289289289289289
100428820040251000100010007000126928828812331461000100028828811100110000073216222851000289289289289289
100428820040251000100010007000126928828812331461000100028828811100110000073216222851000289289289289289

Test 2: throughput

Count: 8

Code:

  movi v0.2s, #3, lsl #8
  movi v1.2s, #3, lsl #8
  movi v2.2s, #3, lsl #8
  movi v3.2s, #3, lsl #8
  movi v4.2s, #3, lsl #8
  movi v5.2s, #3, lsl #8
  movi v6.2s, #3, lsl #8
  movi v7.2s, #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)0309l2 tlb miss instruction (0a)181e3f51schedule 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)5e60696d6emap 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)acc2branch cond mispred nonspec (c5)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0ea? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200591550000402580100100800001008000050056000000200192003820038997339996801002008000020020038200381180201100991001008000010000000511051622200350800001002003920039200392003920039
80204200381550000402580100100800001008000050056000000200192003820038997339996801002008000020020038200381180201100991001008000010000000511021622200350800001002003920039200392003920039
8020420038155000010912580100100800001008000050056000000200192003820038997339996801002008000020020038200381180201100991001008000010000000511021622200351800001002003920039200392003920039
80204200381560000402580100100800001008000050056000000200192003820038997339996801002008000020020038200381180201100991001008000010000000511021622200350800001002003920039200392003920039
80204200381560000402580100100800001008000050056000000200192003820038997339996801002008000020020038200381180201100991001008000010000000511021622200350800001002003920039200392003920039
80204200381550000402580100100800001008000050056000000200192003820038997339996801002008000020020038200381180201100991001008000010000000511021622200350800001002003920039200392003920039
80204200381560000402580100100800001008000050056000000200192003820038997339996801002008000020020038200381180201100991001008000010000000511021622200350800001002003920039200392003920039
80204200381550000402580100100800001008000050056000000200192003820038997339996801002008000020020038200381180201100991001008000010000000511021622200350800001002003920039200392003920039
80204200381550000932580100100800001008000050056000000200192003820038997339996801002008000020020038200381180201100991001008000010000000511021622200350800001002003920039200392003920039
80204200381550000402580100100800001008000050056000000200192003820038997339996801002008000020020038200381180201100991001008000010000000511021622200350800001002003920039200392003920039

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)0918191e1f3f51schedule 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)60696b6d6emap 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)accfd0d2l1i cache miss demand (d3)d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420048155000000039258001010800001080000505600001200190200382003899963100188001020800002020038200381180021109101080000100050200057166520035080000102003920039200392003920039
8002420038155000000039258001010800001080000505600001200190200382003899963100188001020800002020038200381180021109101080000100050200057167720035080000102003920039200392003920039
8002420038156000000039258001010800001080000505600001200190200382003899963100188001020800002020038200381180021109101080000100050200056166720035080000102003920039200392003920039
8002420038156000000083258001010800001080000505600001200190200382003899963100188001020800002020038200381180021109101080000100050200067165720035080000102003920039200392003920039
8002420038155000000039258001010800001080000505600001200190200382003899963100188001020800002020038200381180021109101080000100350200065166620035080000102003920039200392003920039
80024200381560000000392580010108000010800005056000012001902003820038999631001880010208000020200382003811800211091010800001009050200056166520035080000102003920039200392003920039
8002420038155000000039258001010800001080000505600001200190200382003899963100188001020800002020038200381180021109101080000100050200056166520035080000102003920039200392003920039
8002420038155000000039258001010800001080000505600001200190200382003899963100188001020800002020038200381180021109101080000100050200056167520035080000102003920039200392003920039
80024200381550000000392580010108000010800005056000012001902003820038100043100188001020800002020038200381180021109101080000100050200067165620035080000102003920039200392003920039
8002420038155000000039258001010800001080000505600001200190200382003899963100188001020800002020038200381180021109101080000100050200067168720035080000102003920039200392003920039