Apple M1 Microarchitecture Research by Dougall Johnson

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

ZIP1 (vector, 16B)

Test 1: uops

Code:

  zip1 v0.16b, v0.16b, v1.16b
  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)03080b1e3a3f4e51inst 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
100420371600006116872510001000100026468012018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371500008216872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
1004203716000012416872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371600006116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371600006116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
1004203715000015616872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371600006116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371600006116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371700006116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371600016116872510001000100026468002018203720841572318951000100020002037203721100110000073216221787100020382038203820382038

Test 2: Latency 1->2

Code:

  zip1 v0.16b, v0.16b, v1.16b
  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)03181e3f4e51inst 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)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)9fa8acc2cfd0d5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
10204200371550696119687251010010010000100100005002847680102001820037200371842231874510100200100002002000020037200371110201100991001001000010003071001161119791100001002003820038200382003820038
1020420037155006119687251010010010000100100005002847680102001820037200371842231874510100200100002002000020037200371110201100991001001000010000071001161119791100001002003820038200382003820038
1020420037155006119687251010010010000100100005002847680102001820037200371842231874510100200100002002000020037200371110201100991001001000010000071001161119791100001002003820038200382003820038
1020420037155006119687251010010010000100100005002847680102001820037200371842231874510100200100002002000020037200371110201100991001001000010000071001161119791100001002003820038200382003820038
1020420037155006119687251010010010000100100005002847680102001820037200371842231874510100200100002002000020037200371110201100991001001000010000071001161119791100001002003820038200382003820038
1020420037155006119687251010010010000100100005002847680102001820037200371842231874510100200100002002000020037200371110201100991001001000010010071001161119791100001002003820038200382003820038
1020420037155006119687251010010010000100100005002847680102001820037200371842231874510100200100002002000020037200371110201100991001001000010000071001161119791100001002008620038200382003820038
1020420037155006119687251010010010000100100005002847680102001820037200371842231876310100200100002002000020037200371110201100991001001000010000071001161119791100001002003820038200382003820038
10204200371550126119687251010010010000100100005002847680102001820037200371842231874510100200100002002000020037200371110201100991001001000010010071001161119791100001002003820038200382003820038
10204200371550015619687251010010010000100100005002847680102001820037200371842231874510100200100002002000020037200371110201100991001001000010000071001161119791100001002003820038200382003820038

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)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)9fa8cfd5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
10024200371557861196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001006402162219785010000102003820038200382003820038
1002420037155661196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001006402162219785010000102003820038200382003820038
1002420037155061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001006402162219785010000102003820038200382003820038
1002420037155361196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001006402162219785010000102003820038200382003820038
1002420037155961196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001006402162219785010000102003820038200382003820038
1002420037155061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001006402162219785010000102003820038200382003820038
1002420037155061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001006402162219785010000102003820038200382003820038
1002420037155061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001006402162219785010000102003820038200382003820038
10024200371550536196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001006402162219785010000102003820038200382003820038
1002420037156061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001006402162219785010000102003820038200382003820038

Test 3: Latency 1->3

Code:

  zip1 v0.16b, v1.16b, 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)03081e1f3f4e51inst 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)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)9fa6a7a8acc2cfd0d5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
102042003715500061196872510100100100001001000050028476801020018200372003718422318745101002001000020020000200372003711102011009910010010000100002930710011611197910100001002003820038200382003820038
10204200371550006119687251010010010000100100005002847680002001820037200371842231874510100200100002002000020037200371110201100991001001000010000100710011611197910100001002003820038200382003820038
1020420037155000726196872510100100100001001000050028476801020018200372003718422318745101002001000020020000200372003711102011009910010010000100004400710011611197910100001002003820038200382003820038
10204200371550006119687251010010010000100100005002847680042001820037200371842231874510100200100002002000020037200371110201100991001001000010000200710011611197910100001002003820038200382003820038
10204200371550006119687251010010010000100100005002847680002001820037200371842231874510100200100002002000020037200371110201100991001001000010000000710011611197910100001002003820038200382003820038
10204200371550008919687251010010010000100100005002847680002001820037200371842231874510100200100002002000020037200371110201100991001001000010000100710011611197910100001002003820038200382003820038
102042003715500010319687251010010010000100100005002847680002001820037200371842231874510100200100002002000020037200371110201100991001001000010000200710011611197910100001002003820038200382003820038
10204200371550006119687251010010010000100100005002847680002001820037200371842231874510100200100002002000020037200371110201100991001001000010000100710011611197911100001002003820038200382003820038
102042003715500013119687251010010010000100100005002847680042001820037200371842231874510100200100002002000020037200371110201100991001001000010000100710011611197910100001002003820038200382003820038
10204200371550006119687251010010010000100100005002847680002001820037200371842231874510100200100002002000020037200371110201100991001001000010000130710011611197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire (01)cycle (02)030a1e3f4e51inst 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)9fa6a7a8abacc2cfd2d5d6ddinst fetch restart (de)e0ec? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
100242003715500107196872510023101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000000064003163319785010000102003820038200382003820038
10024200371550061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000000064003163319785010000102003820038200382003820038
100242003715500611968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010010093064003163319785010000102003820038200382003820038
10024200371560061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000200064003163319785010000102003820038200382003820038
100242003715500103196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000000064003163319785010000102003820038200382003820038
10024200371550061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000009064003163319785010000102003820038200382003820038
10024200371560061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000109064003163319785010000102003820038200382003820038
1002420037161206119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100000150064003163319785010000102003820038200382003820038
10024200371552061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000000064003163319785010000102003820038200382003820038
10024200371552061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000000064003163319785010000102003820038200382003820038

Test 4: throughput

Count: 8

Code:

  zip1 v0.16b, v8.16b, v9.16b
  zip1 v1.16b, v8.16b, v9.16b
  zip1 v2.16b, v8.16b, v9.16b
  zip1 v3.16b, v8.16b, v9.16b
  zip1 v4.16b, v8.16b, v9.16b
  zip1 v5.16b, v8.16b, v9.16b
  zip1 v6.16b, v8.16b, v9.16b
  zip1 v7.16b, v8.16b, v9.16b
  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)030818191e1f3f51inst 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)9fa0a1a6a8a9acc2cficache miss (d3)d5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
8020420038155000006325801001008000010080000500640766120019200382003899733999680100200800002001600002003820038118020110099100100800001000000000511002161120035800001002003920092200392003920039
8020420038155000004025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000000000511001161120035800001002003920039200392003920039
8020420038155000004025801001008009210080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000000000511001161120035800001002003920039200392003920039
802042003815500100283425801001208000010080000500640000120019200382003899733999680100200800002001600002003820038218020110099100100800001000000000511001161120035800001002003920039200392003920039
8020420038156000006325801001008000010080000500640000020059200382003899733999680100200800002001600002003820038118020110099100100800001002200000511001161120035800001002003920039200392003920039
8020420038156100004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000000030511001161120035800001002009220039200392003920039
8020420038155000004025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000020000511001161120076800001002003920039200392003920039
8020420038156000004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000000000511001161120035800001002003920039200392003920039
80204200381550006040258010010080000100800005006400000200192003820038997331002380100200800002001600002003820038118020110099100100800001000000000511001161120035800001002003920039200392003920039
802042003815500090402580100100800001008000050064000012001920038200389973399968010020080000200160000200382003811802011009910010080000100000004680511001161120035800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire (01)cycle (02)0308191e3f51inst 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)9fa0a1a6a8a9accfd5d6dbddinst fetch restart (de)e0? int output thing (e9)ea? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
80024200471560003925800121280000108000060640000120019200382003899963100188001020800002016000020038200381180021109101080000100000005020316111200350080000102201520041200392003920039
80024200381550003925800101080000108000050640000020019200382003899963100188001020800002016000020038200381180021109101080000100000005020216023200352080000102003920039200392003920039
80024200381550003925800101080000128000050640000020019200382003899963100188001020800002016000020038200381180021109101080000100000005020116011200350080000102003920039200392003920039
800242003815500041925800101080000108000050640000020019200382003899963100188001020800002016000020038200381180021109101080000100000005020116011200970080000102003920039200392003920039
80024200381550003925800101080000108000050640000020019200382003899963100188001020800002016000020038200381180021109101080000100000005020116021200350080000102003920039200392003920039
80024200381550003925800101080000108000050640000020019200382003899963100188001020800002016000020038200381180021109101080000100000005020116011200350080000102003920039200392003920039
800242003815600039258001010800001080000506400000200192003820038999631001880010208000020160000200382003811800211091010800001000000050201160112003501780000102003920039200392003920039
80024200381550003925800101080000108000050640000020019200382003899963100188001020800002016000020038200381180021109101080000100000005020116011200350080000102003920039200392003920039
800242003815500123925800101080000108000050640000020019200382003899963100188001020800002016000020038200381180021109101080000100000005020116011200350080000102003920039200392003920039
800242003815600060925800121080000108000050640000020019200382003899963100188001020800002016000020038200381180021109101080000100001005020116011200350080000102003920039200392003920039