Apple M1 Microarchitecture Research by Dougall Johnson

Firestorm: Overview | Base Instructions | SIMD and FP Instructions
Icestorm:  Overview | Base Instructions | SIMD and FP Instructions

MVNI (vector, 8H)

Test 1: uops

Code:

  mvni v0.8h, #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 (01)cycle (02)031e1f3f51inst issue (52)~issue fp/simd (54)~dispatch fp/simd (57)huge thing fp/simd (5b)60696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op fp/simd (7e)8283pipeline redirect (84)85inst all (8c)inst neon or fp (9a)accfd5d6ddinst fetch restart (de)e0? fp/simd (ee)f5f6f7f8fd
10042882008225100010001000700012692882881233146100010002882881110011000073116112851000289289289289289
10042882004025100010001000700002692882881233146100010002882881110011000073116112851000289289289289289
10042882308225100010001000700002692882881233146100010002882881110011000073116112851000289289289289289
10042882004025100010001000700002692882881233146100010002882881110011000073116112851000289289289289289
10042882004025100010001000700002692882881233146100010002882881110011000073116112851000289289289289289
10042882004025100010001000700012692882881233146100010002882881110011000073116112851000289289289289289
10042882004025100010001000700002692882881233146100010002882881110011000073116112851000289289289289289
10042882004025100010001000700002692882881233146100010002882881110011000073116112851000289289289289289
10042882004025100010001000700012692882881233146100010002882881110011000073116112851000289289289289289
10042882004025100010001000700012692882881233146100010002882881110011000073116112851000289289289289289

Test 2: throughput

Count: 8

Code:

  mvni v0.8h, #3
  mvni v1.8h, #3
  mvni v2.8h, #3
  mvni v3.8h, #3
  mvni v4.8h, #3
  mvni v5.8h, #3
  mvni v6.8h, #3
  mvni v7.8h, #3

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

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

retire (01)cycle (02)0309181e3f51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)60696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa1a6a8acc5branch mispredict (cb)cdcfd5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
80204200601550004025801001008000010080000500560000120019200382003899733999680100200800002002003820038118020110099100100800001000000000511022822200350800001002003920039200392003920039
80204200381550004025801001008000010080000500560000020019200382003899733999680100200800002002003820038118020110099100100800001000000000511021622200350800001002003920039200392003920039
80204200381550004025801001008000010080000500560000120019200382003899733999680100200800002002003820038118020110099100100800001000000000511021622200350800001002003920039200392003920039
80204200381550004025801001008000010080000500560000120019200382003899733999680100200800002002003820038118020110099100100800001000000000511021622200350800001002003920039200392003920039
802042003815500124025801001008000010080000500560000020019200382003899733999680100200800002002003820038118020110099100100800001000000000511021622200350800001002003920039200392003920039
80204200381550004025801001008000010080000500560000120019200382003899733999680100200800002002003820038118020110099100100800001000000000517921622200350800001002003920039200392003920039
80204200381550004025801001008000010080000500560000120019200382003899733999680100200800002002003820038118020110099100100800001000000000512621622201130800001002003920039200392003920039
802042003815500070525801001008000010080000610560000020019200382003899733999680100200800002002003820038118020110099100100800001000000000511026222200840800001002003920039200392003920039
80204200381550004025801001008000010080000500560000120019200382003899733999680201200800002002003820089118020110099100100800001000003000513421622200350800001002003920039200392003920039
80204200381550004025801001008000010080000500560000120019200382003899733999680100200800002002003820038118020110099100100800001000000000511021622200350800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire (01)cycle (02)03080918191e3f51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)60696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa8accdcfd0d5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
80024200471500000039258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000050350316762003580000102003920039200392003920039
80024200381500000039258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001006050300716432003580000102003920039200392003920039
8002420038149000013539258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000050320416762003580000102003920039200392003920039
80024200381500000039258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000050320616662003580000102003920039200392003920039
80024200381500000039258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000050320816672003580000102003920039200392003920039
80024200381500000039258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000050320416462003580000102003920039200392003920039
80024200381500000039258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000050320716762003580000102003920039200392003920039
80024200381490000039258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000050320416672003580000102003920039200392003920039
800242003815000000704258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000050320416442003580000102003920039200392003920039
80024200381500000039258001010800001080000505600000200192003820038999631001880010208000020200382003811800211091010800001000050320416432003580000102003920039200392003920039