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, msl)

Test 1: uops

Code:

  mvni v0.4s, #3, msl #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
10042882040251000100010007000026928828812331461000100028828811100110000073316112851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110001073116112851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289
10042882040251000100010007000026928828812331461000100028828811100110000073116112851000289289289289289

Test 2: throughput

Count: 8

Code:

  mvni v0.4s, #3, msl #8
  mvni v1.4s, #3, msl #8
  mvni v2.4s, #3, msl #8
  mvni v3.4s, #3, msl #8
  mvni v4.4s, #3, msl #8
  mvni v5.4s, #3, msl #8
  mvni v6.4s, #3, msl #8
  mvni v7.4s, #3, msl #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)031e3f51schedule 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)9faccdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042005615506125801001008000010080000500560000120019200382003899733999680100200800002002003820038118020110099100100800001000051102162220035800001002003920039200392003920039
802042003815604025801001008000010080000500560000120019200382003899733999680100200800002002003820038118020110099100100800001003051102162220035800001002003920039200392003920039
802042003815504025801001008000010080000500560000120019200382003899733999680100200800002002003820038118020110099100100800001000051102162220035800001002003920039200392003920039
802042003815608225801001008000010080000500560000120019200382003899733999680100200800002002003820038118020110099100100800001000051102162220035800001002003920039200392003920039
802042003815504025801001008000010080000500560000020019200382003899733999680100200800002002003820038118020110099100100800001000051102162220035800001002003920039200392003920039
802042003815504025801001008000010080000500560000020019200382003899733999680100200800002002003820038118020110099100100800001000051102162220035800001002003920039200392003920039
802042003815534025801001008000010080000500560000020019200382003899733999680100200800002002003820038118020110099100100800001000051102162220035800001002003920039200392003920039
802042003815504025801001008000010080000500560000120019200382003899733999680100200800002002003820038118020110099100100800001000051102162220035800001002003920039200392003920039
802042003815504025801001008000010080000500560000020019200382003899733999680100200800002002003820038118020110099100100800001000051102162220035800001002003920039200392003920039
8020420038155012625801001008000010080000500560000120019200382003899733999680100200800002002003820038118020110099100100800001000051102162220035800001002003920039200392003920039

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)191e1f3f51schedule 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242003915600006082580010108000010800005056000012001920038200389996310018800102080000202003820038118002110910108000010005020516452003580000102003920039200392003920039
800242009716101088622580010108000010800005056000012001920038200389996310018800102080000202003820038118002110910108000010105020516552003580000102003920039200392003920039
80024200381550000392580010108000010800005056000012001920038200389996310018800102080000202003820038118002110910108000010035020616752003580000102003920039200392003920039
80024200381550000392580010108000010800005056000012001920038200389996310018800102080000202008920038118002110910108000010005020616552003580000102003920039200392003920039
800242003815500006182580010108000010800005056000012001920038200389996310018800102080000202003820038118002110910108000010005020616552003580000102003920039200392003920039
800242003815500006102580010108000010800005056000012001920038200389996310018800102080000202003820038118002110910108000010005020516552003580000102003920039200392003920039
800242003815600001042580010108000010800005056000012001920038200869996310044801112080000202003820086118002110910108000010005040616562003580000102003920039200392003920088
800242003815610120812580010108000010800005056000012001920038200389996310018800102080000202003820038118002110910108000010005020616672003580000102003920039200392003920039
800242003815500003172580010108000010800005056000012001920038200389996310018800102080000202003820038118002110910108000010005020616652003580000102003920039200392003920039
800242003815500002682580010108000010800005056000012001920038200389996310018800102080000202003820038118002110910108000010005020516552003580000102003920039200392003920039