Apple M1 Microarchitecture Research by Dougall Johnson

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

FCMEQ (vector, 4S)

Test 1: uops

Code:

  fcmeq v0.4s, v0.4s, v1.4s
  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)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)a8accfd5d6ddinst fetch restart (de)e0? fp/simd (ee)f5f6f7f8fd
10042037150611687251000100010002646802018203720371572318951000100020002037203711100110000073316221787100020382038203820382038
10042037150611687251000100010002646802018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
10042037150611687251000100010002646802018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
10042037150611687251000100010002646802018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
10042037150611687251000100010002646802018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
10042037150611687251000100010002646802018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
10042037150821687251000100010002646802018203720371572318951000100020002037203711100110001073216221787100020382038203820382038
10042037150611687251000100010002646802018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
10042037160611687251000100010002646802018203720371572318951000100020002037203711100110000090216221787100020382038203820382038
10042037150611687251000100010002646802018203720371572318951000100020002037203711100110002073216221787100020382038203820382038

Test 2: Latency 1->2

Code:

  fcmeq v0.4s, v0.4s, v1.4s
  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)031e3a3f4e51inst 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)9fa0a1a8acc5branch mispredict (cb)cdcfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
1020420037150001471968725101001001000010010000500284768002001820037200371842961874110100200100082002001620037200371110201100991001001000010000001117180160019801100001002003820038200382003820038
102042003715000611968725101001001000010010000500284768012001820037200371842961874110100200100082002001620037200371110201100991001001000010000001117170160019802100001002003820038200382003820038
102042003714900611968725101001001000010010000500284768002001820037200371842971874010100200100082002001620037200371110201100991001001000010000001117180160019801100001002003820038200382003820038
102042003715000611968725101001001000010010000500284768002001820037200371842971874110100200100082002001620037200371110201100991001001000010000131117170160019802100001002003820038200382003820038
1020420037150002341968725101001001000010010000500284768002001820037200371842971874010100200100082002001620037200371110201100991001001000010000000007101161119791100001002003820038200382003820038
102042003715100821968725101001001000010010000500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010000000007101161119791100001002003820038200382003820038
102042003715000611968725101001001000010010000500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010000000007101161119791100001002003820038200382003820038
1020420037150302351968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010000000007101161119791100001002003820038200382003820038
102042003715000611968725101001001000010010000500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010000030007101161119791100001002003820038200852003820038
1020420037150914791967625101001001000011810600500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010000030007101161119791100001002003820038200382003820038

1000 unrolls and 10 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)696d6edispatch 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)9fa8acc5cdcfd5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
10024200371500189196872510010101000010100005028476802001820037200371844403187671001020100002020000200372003711100211091010100001010006403162219785010000102003820038200382003820038
1002420037150061196872510010101000010100005028476802001820037200371844403187671001020100002020000200372003711100211091010100001000006402162219785010000102003820038200382003820038
10024200371500103196872510010101000010100005028476802001820037200371844403187671001020100002020000200372003711100211091010100001003006402162219785010000102003820038200382003820038
1002420037150061196872510010101000010100005028476802001820037200371844403187671001020100002020000200372003711100211091010100001000006402162219785010000102003820038200382003820038
10024200371500135196872510010101000010100005028476802001820037200371844403187671001020100002020000200372003711100211091010100001010006402162219785010000102003820038200382003820038
1002420037150082196872510010101000010100005028476802001820037200371844403187671001020100002020000200372003711100211091010100001010006402162219785010000102003820038200382003820038
1002420037150061196872510010101000010100005028476802001820037200371844403187671001020100002020000200372003711100211091010100001000106402162219785010000102003820038200382003820038
1002420037150082196872510010101000010100005028476802006520037200371844403187671001020100002020000200372003711100211091010100001000006402162219785010000102003820038200382003820038
1002420037150061196872510010101000010100005028476802001820037200371844403187671001020100002020000200372003711100211091010100001000006402162219785010000102003820038200382003820038
1002420037150061196872510010101000010100005028476802001820037200371844403187671001020100002020000200372003711100211091010100001000006402162219785010000102003820038200382003820038

Test 3: Latency 1->3

Code:

  fcmeq v0.4s, v1.4s, v0.4s
  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)033a3f4e51inst 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)6061696d6edispatch 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)9fa8accfd0d5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
1020420037150061196872510100100100001001000050028476800020018200372003718422031874510100200100002002000020037200371110201100991001001000010000710011611197910100001002003820038200382003820038
1020420037150061196872510100100100001001000050028476800020018200372003718422031874510100200100002002000020037200371110201100991001001000010000710011611197910100001002003820038200382003820038
1020420037150061196872510100100100001001000050028476800020018200372003718422031874510100200100002002000020037200371110201100991001001000010000710011611197910100001002003820038200382003820038
1020420037150082196872510100100100001001000050028476800020018200372003718426031874510100200100002002000020037200371110201100991001001000010000710011611197910100001002003820038200382003820038
1020420037150061196872510100100100001001000050028476800020018200372003718422031874510100200100002002000020037200371110201100991001001000010000710011611197910100001002003820038200382003820038
1020420037150061196872510100100100001001000050028476800020018200372003718422031874510100200100002002000020037200371110201100991001001000010000710011611197910100001002003820038200382003820038
1020420037150061196872510100100100001001000050028476800020018200372003718422031874510100200100002002000020037200371110201100991001001000010010710011611197910100001002003820038200382003820038
10204200371500841968725101001001000010010000500284768000200182003720037184220318745101002001000020020000200372003711102011009910010010000100007100116111979126100001002003820038200382003820038
10204200371500425196872510100100100001001000050028476800020018200372003718422031874510100200100002002000020037200371110201100991001001000010000710011611197910100001002003820038200382003820038
1020420037150061196872510100100100001001000050028476800020018200372003718422031874510100200100002002000020037200371110201100991001001000010000710011611197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire (01)cycle (02)03080b18191e3a3f4e51inst 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)9fa8accfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
1002420037150000015061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
1002420037150000000685196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
1002420037150000000688196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
100242003715000000061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
100242003715000000061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
100242003715000006061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
100242003715000000061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
100242003715000000061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
100242003715000000061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
100242003715000000061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038

Test 4: throughput

Count: 8

Code:

  fcmeq v0.4s, v8.4s, v9.4s
  fcmeq v1.4s, v8.4s, v9.4s
  fcmeq v2.4s, v8.4s, v9.4s
  fcmeq v3.4s, v8.4s, v9.4s
  fcmeq v4.4s, v8.4s, v9.4s
  fcmeq v5.4s, v8.4s, v9.4s
  fcmeq v6.4s, v8.4s, v9.4s
  fcmeq v7.4s, v8.4s, v9.4s
  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)030b18191e3f51inst 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)9fa1a8a9accfd5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
802042003815000004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000000511031622200350800001002003920039200392003920039
802042003815000004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000000511021622200350800001002003920039200392003920039
802042003815000004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000000511021622200350800001002003920039200392003920039
802042003815000004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000000511021622200350800001002003920039200392003920039
802042003815000004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000000511026622200350800001002003920039200392003920039
802042003815000004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000000511021622200350800001002003920039200392003920039
802042003815000004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000000511021622200350800001002003920039200392003920039
802042003815512213232525801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000000511021622200350800001002003920039200392003920039
802042003815000004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000000511021622200350800001002003920039200392003920039
802042003815000004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000000511031622200350800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire (01)cycle (02)03181e3f51inst 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)60696b6d6edispatch 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)9faccfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
8002420047150003925800101080000108000056640000020019020038200389996031001880010208000020160000200382003811800211091010800001005020116112003580000102003920039200392003920039
8002420038150103925800101080000108000050640000020019020038200389996031001880010208000020160000200382003811800211091010800001005020116112003580000102003920039200392003920039
80024200381500051425800101080000108000050640000020019020038200389996031001880010208000020160000200382003811800211091010800001005020116112003580000102003920039200392003920039
8002420038150003925800101080000108000050640000020019020038200389996031001880010208000020160000200382003811800211091010800001005020116112003580000102003920039200392003920039
8002420038150003925800101080000108000050640000020019020038200389996031001880010208000020160000200382003811800211091010800001005020116112003580000102003920039200392003920039
8002420038150003925800101080000108000050640000020019020038200389996031001880010208000020160000200382003811800211091010800001005020116112003580000102003920039200392003920039
8002420038150003925800101080000108000050640000020019020038200389996031001880010208000020160000200382003811800211091010800001005020116112003580000102003920039200392003920039
8002420038150003925800101080000108000050640000020019020038200389996031001880010208000020160000200382003811800211091010800001005020116112003580000102003920039200392003920039
8002420038150003925800101080000108000050640000020019020038200389996031001880010208000020160000200382003811800211091010800001035020116112003580000102003920039200392003920039
8002420038150003925800101080000108000050640000020019020038200389996031001880010208000020160000200382003811800211091010800001005020116112003580000102003920039200392003920039