Apple M1 Microarchitecture Research by Dougall Johnson

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

AESIMC

Test 1: uops

Code:

  aesimc v0.16b, v0.16b
  movi v0.16b, 1
  movi v1.16b, 2

(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)031e3f4e51inst 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)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst neon or fp (9a)a8accfd5d6ddinst fetch restart (de)e0? fp/simd (ee)f5f6f7f8fd
100420371566116862510001000100026452112018203720371571318951000100010002037203711100110000073316331786100020382038203820382038
100420371506116862510001000100026452112018203720371571318951000100010002037203711100110000073316331786100020382038203820382038
100420371506116862510001000100026452112018203720371571318951000100010002037203711100110000073316331786100020382038203820382038
100420371506116862510001000100026452112018203720371571318951000100010002037203711100110000073316331786100020382038203820382038
100420371506116862510001000100026452112018203720371571318951000100010002037203711100110000073316331786100020382038203820382038
100420371536116862510001000100026452112018203720371571318951000100010002037203711100110000073316331786100020382038203820382038
100420371506116862510001000100026452112018203720371571318951000100010002037203711100110000073316331786100020382038203820382038
100420371506116862510001000100026452112018203720371571318951000100010002037203711100110000073316221786100020382038203820382038
100420371506116862510001000100026452112018203720371571318951000100010002037203711100110000073316331786100020382038203820382038
100420371506116862510001000100026452112018203720371571318951000100010002037203711100110000073316331786100020382038203820382038

Test 2: Latency 1->2

Code:

  aesimc v0.16b, v0.16b
  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 2.0037

retire (01)cycle (02)0308090b181e1f3a3f4e51inst 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)696b6d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)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)9fa0a1a6a8a9acc2cfd5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
1020420037155000000014519686251010010010000100100005002847521200180200372008418421318745101002001000020010000200372003711102011009910010010000100000000071021622197910100001002003820038200382003820038
102042003715500000006119686251010010010000100100005002847521200180200372003718421318745101002001000020010000200372003721102011009910010010000100000000071021622197910100001002003820038200382003820038
102042003715500000006119686251013510010000100100005002847521200180200372003718421718745101002001000020010000200372003711102011009910010010000100000000071021622197910100001002003820038200382003820038
102042003715600000006119686251010010010000100100005002847521200180200372003718421318745101002001000020010000200372003711102011009910010010000100000000071021622197910100001002003820085200382003820038
1020420037155000000061196862510100100100001001000050028475212001802003720037184213187451010020010000200100002003720037111020110099100100100001000004603071021622197910100001002008620038200382003820038
102042003715500000006119686251010010010000121100005002847521200180200372003718421318745101002001000020010000200372003711102011009910010010000100000000071021622198600100001002003820038200382003820038
102042003715500000006119686251010010010000100100005002847521200180200372003718421318745101002001000020010000200372003711102011009910010010000100020000071021622197910100001002003820038200382003820038
102042003715600000006119686251010010010000100100005002847521200180200372003718421318745101002001000020010000200372003711102011009910010010000100000000071021622198620100001002003820038201332008520038
102042003715500000006119686251010010010000100100005002847521200180200372003718421318745101002001000020010000200372003711102011009910010010000100000000071021622197910100001002003820038200382003820038
10204200371550000000113119686451010010010024117100005002847521200180200372003718421318745101002001033120010000200372003711102011009910010010000100000000071021622197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire (01)cycle (02)0308090b18191e1f3a3f4e51inst 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)~map lookup fp/simd (81)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)9fa0a1a6a7a8acc2cfd5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
10024200371560000000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000000006402162219786010000102013320038200382003820038
10024200371550000000061196862510010101000010100005028475210200182003720037184438187671001020100002010000200372003711100211091010100001000000006402162219786010000102003820038200382003820038
10024200371550000000061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000000006402162219786010000102003820038200382003820038
10024200371560000000161196862510010101000010100005028500490200182003720037184433187671001020100002010000200372003711100211091010100001000000006402162219786010000102003820038200382003820038
1002420037155000010320061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000001006402162219786010000102003820038200382003820038
10024200371550000000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000000006402162219786010000102003820038200382003820038
10024200371550000000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001002000006402162219786010000102003820038200382003820038
10024200371550000000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000000006402162219786010000102003820038200382003820038
10024200371550010000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000000006402162219786010000102003820038200382003820038
10024200371560000000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001020200611506402162219786010000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  aesimc v0.16b, v8.16b
  aesimc v1.16b, v8.16b
  aesimc v2.16b, v8.16b
  aesimc v3.16b, v8.16b
  aesimc v4.16b, v8.16b
  aesimc v5.16b, v8.16b
  aesimc v6.16b, v8.16b
  aesimc v7.16b, v8.16b
  movi v8.16b, 9

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

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

retire (01)cycle (02)03080b18191e1f3f51inst 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)~map lookup fp/simd (81)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)9fa1a6a8a9acc2c5branch mispredict (cb)cdcfd5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
8020420059155010100436258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100000000111511801600200350800001002003920039200392003920039
802042003815600000029258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100000000111511801600200350800001002003920039200392003920039
8020420038155000000138258010810080008100800205006401321200192003820094997769989801202008003220080135200382003811802011009910010080000100000000111511801600200350800001002003920039200392003920039
80204200381550020007392580108100800081008002050064013212001920038200381000469989801202008003220080032200382003811802011009910010080000100000004111513701600200350800001002003920039200392003920039
802042003815600000052258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100000000111511801600200350800001002003920039200392003920039
802042003815500000132151258010810080008100800205006401320200192003820038997769989801202008003220080032200382003811802011009910010080000100000004111511801600200350800001002003920039200392003920039
8020420038155000000136258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100000000111511801600200350800001002003920039200392003920039
8020420038155000000136258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100001000111511823000200350800001002003920039200392003920039
8020420038156000000918258010810080008100800205006401321200192003820138997769989801202008003220080032200382003811802011009910010080000100000000111511801600200350800001002003920039200392003920039
802042010815600000092258010810080008100800205006401321200192003820087998569989801202008003220080032200382003811802011009910010080000100000000111511801600200350800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire (01)cycle (02)0304080b18191e1f3a3f51inst 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)~map lookup fp/simd (81)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)9fa1a6a8a9acc2cfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
800242005115600000000872580102108009310800005064000012001920038200389996310018800102080000208000020038200381180021109101080000100000005020216552003580000102003920039201072003920039
800242003815600000000392580010108000010800005064000012001920038200389996310018800102080000208000020038200382180021109101080000100000005020416342003580000102003920039200392003920039
800242003815600000000398280010108018710800005064000012007620038200889996310018800102080097208009820038200381180021109101080000100000005020316332003580000102003920039200392003920112
8002420038155001001328802922580010108000010800005064000002001920038200389996310018800102080000208000020038200381180021109101080000100000005020416452003580000102003920039200392003920039
8002420038155001200001232580010108000010800005064000002001920038200389996310071800102080000208000020038200381180021109101080000100000005020716342003580000102003920089200392003920039
800242003815500000000392580010108000010800005064000002001920038200909996310018801072080000208000020038200381180021109101080000100000005020216552003580000102003920039200392003920039
800242003815500000000392580198108000010800975064000002001920038200389996310018800102080000208000020038200381180021109101080000100000005020416442003580000102003920088200392003920039
800242003815600000000606080010108000010800005064000002001920038200389996310018800102080000208000020038200381180021109101080000100000005020440342003580000102003920039200392003920039
800242003815500000000832580010108000010800005064000012001920038200389996310018800102080000208000020038200381180021109101080000100202005020316552003580000102003920039200392003920039
8002420038155000000007292580010108000010800005064000002001920038200389996310018800102080000208000020109200381180021109101080000100000005020316442003580000102003920039200392003920039