Apple M1 Microarchitecture Research by Dougall Johnson

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

UZP1 (vector, 4H)

Test 1: uops

Code:

  uzp1 v0.4h, v0.4h, v1.4h
  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
100420371606116872510001000100026468002018203720371572318951000100020002037203711100110000073316221829100020382038203820382038
1004203716126116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371606116872510001000100026468002018203720371572318951000100020002037203711100110000073224221787100020382038203820382038
100420371606116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371606116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
1004203716010316872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371606116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371506116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371606116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371606116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038

Test 2: Latency 1->2

Code:

  uzp1 v0.4h, v0.4h, v1.4h
  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)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)9fa0a6a8acbranch mispredict (cb)cfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
1020420037155061196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
1020420037155061196872510100100100001001000050028476800200182003720037184220318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
1020420037156061196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382007620038
1020420037161061196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
10204200371550251196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100400007101161119791100001002003820038200382003820038
1020420037155061196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
1020420037155061196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
1020420037155061196872510100100100001001000054628476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
1020420037155061196872510100100100001001000050028476800200182003720037184220318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
1020420037155061196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038

1000 unrolls and 10 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)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)9fa0a1a8acc5cfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
10024200371500061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000000640316221978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000000640216221978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000000640216221978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000031640216321978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000000640216221978510000102003820038200382003820038
1002420037150006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100002490640216221978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000000640216221978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000000640216221978510000102003820038200382003820038
100242003715021321887196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000000640216221978510000102003820038200382003820038
100242003715000536196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000000640216221978510000102003820038200382003820038

Test 3: Latency 1->3

Code:

  uzp1 v0.4h, v1.4h, v0.4h
  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)9fa8acc5cfd5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
10204200371550611968725101001001000010010000500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010000071011611197910100001002003820038200382003820038
10204200371560611968725101001001000010010000500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010000071011611197910100001002003820038200382003820038
102042003715506119687251010010010000100100005002847680020018200372003718422318745101002001000020020000200372003711102011009910010010000100057071011611197910100001002003820038200382003820038
10204200371550611968725101001001000010010000500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010010071011611197910100001002003820038200382003820038
102042003715606119687251010010010000100100005002847680020018200372003718422318745101002001000020020000200372003711102011009910010010000100069071011611197910100001002003820038200382003820038
1020420037155397261968725101001001000010010000500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010000071011611197910100001002003820038200382003820038
10204200371550611968725101001001000010010000500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010000071011611197910100001002003820038200382003820038
10204200371560611968725101001001000010010000500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010000071011611197910100001002003820038200382003820038
10204200371550611968725101001001000010010000500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010000071011611197910100001002003820038200382003820038
10204200371560611968725101001001000010010000500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010000071011611197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire (01)cycle (02)03080b18191e1f3f4e51inst 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)9fa0a1a6a8acc2cdcfd5d6ddinst fetch restart (de)e0? int output thing (e9)eb? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
1002420037155000000871968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000000064021622197850010000102003820038200382003820038
10024200371550000001561968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000000064021622197850010000102003820038200382003820038
100242003715500000045121968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000000064021622197850010000102003820038200382003820038
1002420037156000000611968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000000164021622197850010000102003820038200382003820038
1002420037155000000611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000030064021622197850010000102003820038200382003820038
1002420037155000000611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000100064021622197850010000102003820038200382003820038
1002420037155000000611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000000064021622197850010000102003820038200382003820038
1002420037155000000611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000000064021622197850010000102003820038200382003820038
1002420037156000000611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000000064021622197850010000102003820038200382003820038
1002420037155000000611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000000064021622197850010000102003820038200382003820038

Test 4: throughput

Count: 8

Code:

  uzp1 v0.4h, v8.4h, v9.4h
  uzp1 v1.4h, v8.4h, v9.4h
  uzp1 v2.4h, v8.4h, v9.4h
  uzp1 v3.4h, v8.4h, v9.4h
  uzp1 v4.4h, v8.4h, v9.4h
  uzp1 v5.4h, v8.4h, v9.4h
  uzp1 v6.4h, v8.4h, v9.4h
  uzp1 v7.4h, v8.4h, v9.4h
  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)0307081e3f51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing ld/st (5a)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)9fa1a8accfd5d6ddinst fetch restart (de)e0ea? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
80204200381560004025801001008000010080000500064000012001920038200389973399968010020080000200160000200382003811802011009910010080000100013511041644200350800001002003920039200392003920039
802042003815600061025801001008000010080000500064000012001920038200389973399968010020080000200160000200382003811802011009910010080000100003511041654200350800001002003920039200392003920039
802042003815500010725801001008000010080000500064000012001920038200389973399968010020080000200160000200382003811802011009910010080000100093511041635200350800001002003920039200392003920039
802042003815500039258010010080000100800005000641648020019200382003899733999680100200800002001600002003820038118020110099100100800001000087511051612200350800001002003920039200392003920039
80204200381550002925801081008000810080020500064013202001920038200389973399968010020080000200160000200382003811802011009910010080000100013511051645200350800001002003920039200392003920039
80204200381550004025801001008000010080000500064000002001920038200389973399968010020080000200160000200382003811802011009910010080000100010511051645200350800001002003920039200392003920039
80204200381550004025801001008000010080000500064000002001920038200389973399968010020080000200160000200382003811802011009910010080000100010511041645200350800001002003920039200392003920039
80204200381560004025801251008000010080000500064000002001920038200389973399968010020080000200160000200382003811802011009910010080000100016511031635200350800001002003920039200392003920039
80204200381551004025801001008009510080000500064000012001920038200389973399968010020080000200160000200382003811802011009910010080000100006511251655200350800001002003920039200392003920039
80204200381551004025801251258000010080000500064000012001920038200389973399968010020080000200160000200382003811802011009910010080000100020511041655200350800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire (01)cycle (02)031e3f51inst 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)9fa8accfd0d5d6ddinst fetch restart (de)e0ec? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
800242004715503925800101080000108000050640000020019200382003899963100188001020800002016000020038200381180021109101080000102305020512163520035080000102003920039200392003920039
800242003815512392580010108000010800005064000012001920038200389996310018800102080000201600002003820038118002110910108000010440502004164320035080000102003920039200392003920039
800242003815503925800101080000108000050640000120019200382003899963100188001020800002016000020135200381180021109101080000105712502003163320035080000102003920039200392003920039
8002420038155039258001010800001080000506400001200192003820038999631001880010208000020160000200382003811800211091010800001020502004164420035080000102003920039200392003920039
8002420038155039258001010800001080000506400001200192003820038999631001880010208000020160000200382003811800211091010800001060502005165520035080000102003920039200392003920039
8002420038155039258001010800001080000506400001200192003820038999631001880010208000020160000200382003811800211091010800001040502005164220035080000102003920039200392003920039
80024200381560609258001010800001080000506400001200192003820038999631001880010208000020160000200382003811800211091010800001050502005163520035080000102003920039200392003920039
8002420038156039258001010800001080000506400001200192003820038999631001880010208000020160000200382003811800211091010800001049502004165320035080000102003920039200392003920039
80024200381550392580010108000010800005064000012001920038200389996310018800102080000201600002003820038118002110910108000010024502005163320035080000102003920039200392003920039
80024200381550392580010108000010800005064000012001920038200389996310018800102080000201600002003820038118002110910108000010240502004164320035080000102003920039200392003920039