Apple M1 Microarchitecture Research by Dougall Johnson

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

UQSHL (vector, 2D)

Test 1: uops

Code:

  uqshl v0.2d, v0.2d, v1.2d
  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)031e1f3f4e51inst 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
100420371600611687251000100010002646802018203720371572318951000100020002037203711100110000373116111787100020382038203820382038
100420371500611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371500611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371500611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371500611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371500611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371500611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371500611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371500611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371500611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038

Test 2: Latency 1->2

Code:

  uqshl v0.2d, v0.2d, v1.2d
  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)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)9fa8a9acc2c5cfd0d5d6ddinst fetch restart (de)e0eb? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
102042003715006119687251010010010000100100005002847680002001820037200371842231874510100200100002002000020037200371110201100991001001000010000000710511611197910100001002003820038200382003820038
102042003715006119687251010010010000100100005002847680152001820037200371842231874510100200100002002000020037200371110201100991001001000010000000710511611197910100001002003820038200382003820038
1020420037150032919687251010010010000100100005002847680002001820037200371842231874510100200100002002000020037200371110201100991001001000010000000710511611197910100001002003820038200382003820038
102042003715006119687251010010010000100100005002847680002001820037200371842231874510100200100002002000020037200371110201100991001001000010000000710511611197910100001002003820038200382003820038
102042003715006119687251010010010000100100005002847680152001820084200371842231874510100200100002002000020037200371110201100991001001000010000000710511611197910100001002003820038200382003820038
102042003715008419687251010010010000100100005002847680102001820037200371842231874510100200100002002000020037200371110201100991001001000010000000710511611197910100001002003820038200382003820038
102042003715006119687251010010010000100100005002847680152001820037200371842231874510100200100002002000020037200371110201100991001001000010000000710511611197910100001002003820038200382003820038
102042003715006119687251010010010000100100005002847680102001820037200371842231874510100200100002002000020037200371110201100991001001000010000000710511611197910100001002003820038200382003820038
102042003714906119687251010010010000100100005002847680102001820037200371842231874510100200100002002000020037200371110201100991001001000010000000710511611197910100001002003820038200382003820038
1020420037150053619687251010010010000100100005002847680052001820037200371842231874510100200100002002000020037200371110201100991001001000010000000710511611197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire (01)cycle (02)030818191e1f3f4e51inst 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)9fa0a1a6a7a8a9acc2cfd5d6daddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
100242003715000000275196211331008512100721510912882847680020234203192032118444318767100102010000202000020037200371110021109101010000100000000064021602219785010000102003820038200382003820038
100242003715000079235282196872510010101000010100005028476800200182003720037184443187671001020100002021338203192003771100211091010100001022300212115064021602219785010000102003820038200382003820038
10024200371490000017019676122100241010000131091256285537802023420358203921846032188741108022111672022324203692036771100211091010100001020211013993081127204320091410000102013220370203752041920367
10024203691531772676163914196218010099181008415111516028515290202702037320133184663187671001020100002020000200372003711100211091010100001040201014035280821602220073310000102008520369203702037120417
10024203681530872675283419196651331006216100721410152762854095020162203682008318454718879110762010163202234220229203228110021109101010000100000000064032402219824510000102027620133201782027520321
100242017915105667217682196872510010101000010100006028566610200182003720037184442618787104682410613222219420217203703110021109101010000100020125995070154803220022410000102003820038200382003820038
100242003715000000611967625100101010072101091260285409502001820037200371844431876710010201000020200002003720037111002110910101000010000000006402161072219785010000102003820038200382003820038
1002420037150000006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100000000064021602219785010000102003820038200382003820038
1002420037150000006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100000000064021602219785010000102003820038200382003820038
1002420037150000006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100000000064021602219785010000102003820038200382003820038

Test 3: Latency 1->3

Code:

  uqshl v0.2d, v1.2d, v0.2d
  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)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)9fa1a6a7a8accfd5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
102042003715006310319687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011621197910100001002003820038200382003820038
1020420037150006119687251010010010000100100005002847680200542003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
1020420037150006119687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
1020420037150006119687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
10204200371500048319687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
10204200371500012419687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
1020420037150006119687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
1020420037150006119687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
1020420037150006119687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
1020420037150006119687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire (01)cycle (02)0307080a1e3a3f4e51inst 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)9fa8accfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
1002420037150101926819687251001010100001010000502847680200182003720037184443187671001020100002020000200372003711100211091010100001000644101610111978510000102003820038200382003820038
1002420037150101026819687251001010100001010000502847680200182003720037184443187671001020100002020000200372003711100211091010100001000644101610101978510000102003820038200382003820038
1002420037149101026819687251001010100001010000502847680200182003720037184443187671001020100002020000200372003711100211091010100001000644101610101978510000102003820038200382003820038
100242003715010102681968725100101010000101000050284768020018200372003718444318767100102010000202000020037200371110021109101010000100064410161051978510000102003820038200382003820038
1002420037150101026819687251001010100001010000502847680200182003720037184443187671001020100002020000200372003711100211091010100001000644101612101978510000102003820038200382003820038
1002420037150101026819687251001010100001010000502847680200182003720037184443187671016320100002020000200372003711100211091010100001000644101610101978510000102003820038200382003820038
10024200371501010273319687251001010100001010000502847680200182003720037184443187671001020100002020000200372003711100211091010100001000644111610101978510000102003820038200382003820038
1002420037150101026819687251001010100001010000502847680200182003720037184443187671001020100002020000200372003711100211091010100001000644101610101978510000102003820038200382003820038
100242003715010102681968725100101010000101000050284768020018200372003718444318767100102010000202000020037200371110021109101010000100064410161051978510000102003820038200382003820038
100242003715010102681968725100101010000101000050284768020018200372003718444318767100102010000202000020037200371110021109101010000100064410165101978510000102003820038200382003820038

Test 4: throughput

Count: 8

Code:

  uqshl v0.2d, v8.2d, v9.2d
  uqshl v1.2d, v8.2d, v9.2d
  uqshl v2.2d, v8.2d, v9.2d
  uqshl v3.2d, v8.2d, v9.2d
  uqshl v4.2d, v8.2d, v9.2d
  uqshl v5.2d, v8.2d, v9.2d
  uqshl v6.2d, v8.2d, v9.2d
  uqshl v7.2d, v8.2d, v9.2d
  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)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)9fa6a8acc5branch mispredict (cb)cdcfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
8020420038150029258010810080008100800205006401320200192003820038997769989801202008003220016006420038200381180201100991001008000010000011151180160020035800001002003920039200392003920039
8020420038150029258010810080008100800205006401320200192003820038997769989801202008003220016006420038200381180201100991001008000010010011151180161020035800001002003920039200392003920039
8020420038150040258010010080000100800005006400000200192003820038997339996801002008000020016000020038200381180201100991001008000010000000051101161120035800001002003920039200392003920039
8020420038150040258010010080000100800005006400000200192003820038997339996801002008000020016000020038200381180201100991001008000010000000051101161120035800001002003920039200392003920039
8020420038150040258010010080000100800005006400000200192003820038997339996801002008000020016000020038200381180201100991001008000010000000051101161220035800001002003920039200392003920039
8020420038150040258010010080000100800005006400000200192003820038997339996801002008000020016000020038200381180201100991001008000010000000051101161220035800001002003920039200392003920039
8020420038150040258010010080000100800005006400000200192003820038997339996801002008000020016000020038200381180201100991001008000010000000051101161120035800001002003920039200392003920039
8020420038150061258010010080000100800005006400000200192003820038997339996801002008000020016000020038200381180201100991001008000010000000051101161120035800001002003920039200392003920039
8020420038150040258010010080000100800005006400000200192003820038997339996801002008000020016000020038200381180201100991001008000010000000051101161120035800001002003920039200392003920039
8020420038150040258010010080000100800005006400000200192003820038997339996801002008000020016000020038200381180201100991001008000010000000051101161120035800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire (01)cycle (02)03070a3a3f51inst 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? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
800242004715011271425800101080000108000050640000020019200382003899963100188001020800002016000020038200381180021109101080000100050241316141420035080000102003920039200392003920039
80024200381501124925800101080000108000050640000020019201882003899963100188001020800002016000020038200381180021109101080000100050241816162020035080000102003920039200392003920039
80024200381501124925800101080000108000050640000020019200382003899963100188001020800002016000020038200381180021109101080000100050242016181820035080000102003920039200392003920039
8002420038150112492580010108000010800005064000002001920038200389996310018800102080000201600002019020038118002110910108000010005024131691620035080000102003920039200392003920039
80024200381501124925800101080000108000050640000120019200382003899963100188001020800002016000020038200381180021109101080000100050241616171820035080000102003920039200392003920039
80024200381501124925800101080000108000050640000020019200382003899963100188011020800002016000020038200381180021109101080000100050241616161620035080000102003920039200392003920039
800242008715011249258001010800001080000506400001200192003820038999617100188001020800002016000020038200381180021109101080000100050411316151820035080000102003920039200392003920039
80024200381501124925800101080000108000050640000120019200382003899963100188001020800002016000020038200381180021109101080000100050241516151320035080000102003920039200392003920039
80024200381501124925800101080000108000050640000120019200382003899963100188001020800002016000020038200381180021109101080000100050241816151620035080000102003920039200392003920039
80024200381501124925800101080000108000050640000020019200382003899963100188001020800002016000020038200381180021109101080000100050241416181620035080000102003920039200392003920039