Apple M1 Microarchitecture Research by Dougall Johnson

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

EXT (vector, 16B)

Test 1: uops

Code:

  ext v0.16b, v0.16b, v1.16b, #3
  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)030b1e3f4e51inst issue (52)~issue fp/simd (54)~dispatch fp/simd (57)huge thing fp/simd (5b)696d6edispatch 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)a8cfd5d6ddinst fetch restart (de)e0? fp/simd (ee)f5f6f7f8fd
100420371504861168725100010001000264680201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
100420371501261168725100010001000264680201820372037157231895100010002000203720371110011000073116111830100020382038203820382038
10042037150061168725100010001000264680201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
10042037150061168725100010001000264680201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
10042037150061168725100010001000264680201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
10042037150361168725100010001000264680201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
10042037150061168725100010001000264680201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
10042037150361168725100010001000264680201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
100420371502461168725100010001000264680201820372037157231895100010002000203720371110011000073116111787100020382038203820382038
10042037150061168725100010001000264680201820372037157231895100010002000203720731110011000073116111787100020382038203820382038

Test 2: Latency 1->2

Code:

  ext v0.16b, v0.16b, v1.16b, #3
  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)03081e3f4e51inst 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)72scheduler 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)9fa8a9accfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
1020420037150002081968725101001001000010010000500284768002001820037200371842203187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715000611968725101001001000010010000500284768012001820037200371842503187451010020010000204206622008520037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715000611968725101001001000010010000500284768012001820037200371842203187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715000611968725101001001000010010000500284768012001820037200371842203187451010020010000200200002003720037111020110099100100100001000037101161119791100001002003820038200382003820038
102042003715000611968725101001001000010010000500284768012001820037200371842203187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715000611968725101001001000010010000500284768012001820037200371842203187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715000611968725101001001000010310000500284768012001820037200371842203187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715000611968725101001001000010010000500284768012001820037200371842203187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715000611968725101001001000010010000500284768002001820037200371842203187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715000611968725101001001000010010000500284768012001820037200371842203187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire (01)cycle (02)03081e3f4e51inst 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)9fa0a6a8a9acc2c5cfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
1002420037150006119687251001010100001010000502847680120018200372003718444318767100102010000202000020037200371110021109101010000100000000640216221978510000102003820038200382003820038
1002420037150008219687251001010100001010000502847680120018200372003718444318767100102010000202000020037200371110021109101010000100000000640216221978510000102003820038200382003820038
1002420037150006119687251001010100001010000502847680120018200372003718444318767100102010000202000020037200371110021109101010000100000020640216221978510000102003820038200382003820038
1002420037150006119687251001010100001010000502847680120018200372003718444318767100102010000202000020037200371110021109101010000100000000640216221978510000102003820038200382003820038
1002420037150006119687251001010100001010000502847680120018200372003718444318767100102010000202000020037200371110021109101010000100000000640216221978510000102003820038200382003820038
1002420037150006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100000000640216221978510000102003820038200382003820038
1002420037150006119687251001010100001010000502847680120018200372003718444318767100102010000202000020037200371110021109101010000100000000640216221978510000102003820038200382003820038
10024200371500012119687251001010100001010000502847680120018200372003718444318767100102010000202000020037200371110021109101010000100000001640216221978510000102003820038200382003820038
1002420037150006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100000000640216221978510000102003820038200382003820038
1002420037150006119687251001010100001010000502847680120018200372003718444318767100102010000202000020037200371110021109101010000100000000640216221978510000102003820038200382003820038

Test 3: Latency 1->3

Code:

  ext v0.16b, v1.16b, v0.16b, #3
  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)031e3f4e51inst 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)9faccfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
102042003715045611968725101001001000010010000500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010007101161119791100001002003820038200382003820038
102042003715024611968725101001001000010010000500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010007101161119791100001002003820038200382003820038
102042003715001561968725101001001000010010000500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010007101161119791100001002003820038200382003820038
102042003715075611968725101001001000010010000500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010007101161119791100001002003820038200382003820038
1020420037150210761968725101001001000010010000500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010007101161119791100001002003820038200382003820038
102042003715030611968725101001001000010010000500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010007101161119791100001002003820038200382003820038
102042003715027611968725101001001000010010000500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010007101161119791100001002003820038200382003820038
1020420037150275361968725101001001000010010000500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010007101161119791100001002003820038200382003820038
10204200371500611968725101001001000010010000500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010007101161119791100001002003820038200382003820038
10204200371490611968725101001001000010010000500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010007101161119791100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire (01)cycle (02)031e1f3f4e51inst 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)72scheduler 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)9fa0a1a6a8acc2cdcfd5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
100242003715090611968725100101010000101000050284768012001820037200371844403187671001020100002020000200372003711100211091010100001000000006403162219785010000102003820038200382003820038
100242003715000611968725100101010000101000050284768012001820037200371844403187671001020100002020000200372003711100211091010100001000000006402162219785010000102003820038200382003820038
100242003715000611968725100101010000101000050284768002001820037200371844403187671001020100002020000200372003711100211091010100001000000006402162219785010000102003820038200382003820038
100242003715000611968725100101010000101000050284768002001820037200371844403187671001020100002020000200372003711100211091010100001000000006402162219785010000102003820038200382003820038
1002420037150003631968725100101010000101000050284768012001820037200371844403187671001020100002020000200372003711100211091010100001000000206402162219785010000102003820038200382003820038
100242003715000611968725100101010000101000050284768012001820037200371844403187671001020100002020000200372003711100211091010100001000000006402162219785010000102003820038200382003820038
100242003715000611968725100101010000101000050284768012001820037200371844403187671001020100002020000200372003711100211091010100001000000006402162219785010000102003820038200382003820038
100242003715000611968725100101010000101000050284768012001820037200371844403187671001020100002020000200372003711100211091010100001000000006402162219785010000102003820038200382003820038
100242003715000611968725100101010000101000050284768012001820037200371844403187671001020100002020000200372003711100211091010100001000000006402162219785010000102003820038200382003820038
100242003715000611968725100101010000101000050284768012001820037200371844403187671001020100002020000200372003711100211091010100001000000006402162219785010000102003820038200382003820038

Test 4: throughput

Count: 8

Code:

  ext v0.16b, v8.16b, v9.16b, #3
  ext v1.16b, v8.16b, v9.16b, #3
  ext v2.16b, v8.16b, v9.16b, #3
  ext v3.16b, v8.16b, v9.16b, #3
  ext v4.16b, v8.16b, v9.16b, #3
  ext v5.16b, v8.16b, v9.16b, #3
  ext v6.16b, v8.16b, v9.16b, #3
  ext v7.16b, v8.16b, v9.16b, #3
  movi v8.16b, 9
  movi v9.16b, 10

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

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

retire (01)cycle (02)030b1e3f51inst 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)9fcfd5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
8020420058150004025801001008000010080000500640000020019200382003899733100228010020080000200160000200382003811802011009910010080000100511031611200350800001002003920039200392003920039
802042003815006402580100100800001008000050064000012001920038200389973399968010020080000200160000200382003811802011009910010080000100511011611200350800001002003920039200392003920039
802042003815000402580100100800001008000050064000002001920038200389973399968010020080000200160000200382003811802011009910010080000100511011611200350800001002003920039200392003920039
802042003815000402580100100800001008000050064000002001920038200389973399968010020080000200160000200382003811802011009910010080000100511011611200350800001002003920039200392003920039
802042003815006402580100100800001008000050064000012001920038200389973399968010020080000200160000200382003811802011009910010080000100511011611200350800001002003920039200392003920039
8020420038150167052580100100800001008000050064000012001920038200389973399968010020080000200160000200382003811802011009910010080000100511011611200350800001002003920039200392003920039
802042003815000402580100100800001008000050064000012001920038200389973399968010020080000200160000200382003811802011009910010080000100511011611200350800001002003920039200392003920039
802042003815000402580100100800001008000050064000012001920038200389973399968010020080000200160000200382003811802011009910010080000100511011611200350800001002003920039200392003920039
802042003815000402580100100800001008000050064000012001920038200389973399968010020080000200160000200382003811802011009910010080000100511011611200350800001002003920039200392003920039
802042003815000402580100100800001008000050064000012001920038200389973399968010020080000200160000200382003811802011009910010080000100511011711200350800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire (01)cycle (02)031e3a3f51inst 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)696d6edispatch 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)9fa6a8accfd0d5d6ddinst fetch restart (de)dfe0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
800242003915001452580010108000010800005064000020019200382003899963100188001020800002016000020038200381180021109101080000100018502265164222003580000102003920039200392003920039
800242003815001452580010108000010800005064000020019200382003899963100188001020800002016000020038200381180021109101080000100024502262162422003580000102003920039200392003920039
800242003815001425258001010800001080000506400002001920038200389996310018800102080000201600002003820038118002110910108000010000502262162422003580000102003920039200392003920039
80024200381500145258001010800001080000506400002001920038200389996310018800102080000201600002003820038118002110910108000010000502264164422003580000102008920039200392003920039
80024200381500145258001010800001080000506400002001920038200389996310018800102080000201600002003820038118002110910108000010000502264162422003580000102003920039200392003920039
80024200381500145258001010800001080000506400002001920038200389996310018800102080000201600002003820038118002110910108000010000502264162422003580000102003920039200392003920039
80024200381500145258001010800001080000506400002001920038200389996310018800102080000201600002003820038118002110910108000010000502264164222003580000102003920039200392003920039
800242003815001330258001010800001080000506400002001920038200389996310018800102080000201600002003820038118002110910108000010000502262164422003580000102003920039200392003920039
80024200381500145258001010800001080000506400002001920038200389996310018800102080000201600002003820038118002110910108000010000502262164422003580000102003920039200392003920039
80024200381500145258001010800001080000506400002001920038200389996310018800102080000201600002003820038118002110910108000010000502264164222003580000102003920039200392003920039