Apple Microarchitecture Research by Dougall Johnson

M1/A14 P-core (Firestorm): Overview | Base Instructions | SIMD and FP Instructions
M1/A14 E-core (Icestorm):  Overview | Base Instructions | SIMD and FP Instructions

USHL (vector, 2S)

Test 1: uops

Code:

  ushl v0.2s, v0.2s, v1.2s
  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 uop (01)cycle (02)031e3f4e51schedule uop (52)schedule simd uop (54)dispatch simd uop (57)ldst uops in schedulers (5b)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map simd uop (7e)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst simd alu (9a)ld unit uop (a6)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100420371606116872510001000100026468012018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371606116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371606116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371606116872510001000100026468012018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371606116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371706116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371606116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371606116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371608416872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038
100420371606116872510001000100026468002018203720371572318951000100020002037203711100110000073216221787100020382038203820382038

Test 2: Latency 1->2

Code:

  ushl v0.2s, v0.2s, v1.2s
  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 uop (01)cycle (02)031e3f4e51schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd alu (9a)9fl1d cache writeback (a8)acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020420037155061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071021611197910100001002003820038200382003820038
10204200371550441196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
10204200371550611968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010000000710116111979117100001002003820038200382003820038
1020420037155061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
1020420037155061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
1020420037155061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
1020420037156661196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000300071011611197910100001002003820038200382003820038
1020420037155061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
10204200371610103196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
10204200371560131196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03l2 tlb miss data (0b)1e3f4e51schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd alu (9a)9fl1d tlb access (a0)ld unit uop (a6)l1d cache writeback (a8)acbccdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002420037155006119687251001010100001010000502847680120018200372003718444318767100102010000202000020037200371110021109101010000100000006406165519785010000102003820038200382003820038
1002420037150006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100000006405165519785010000102003820038200382003820038
1002420037150006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100000006406164419785010000102003820038200382003820038
10024200371500025119687251001010100001010000502847680120018200372003718444318767100102010000202000020037200371110021109101010000100000006405166519785010000102003820038200382003820038
1002420037155008919687251001010100001010000502847680120018200372003718444318767100102010000202000020037200371110021109101010000100000006404164619785010000102003820038200382003820086
1002420037150006119687251001010100001010000502847680120018200372003718444318767100102010000202000020037200371110021109101010000100000006405165519785010000102003820038200382008520038
100242003715002761196872510010101000010100005028476801200182003720037184441418767100102010000202000020037200371110021109101010000100000006405166519785010000102003820038200382003820038
100242003715004416119687251001010100001010000502847680120018200372003718444318767100102010000202000020037200371110021109101010000100000006405165519785010000102003820038200382003820038
100242003715004326119687251001010100001010000502847680120018200372003718444318767100102010000202000020037200371110021109101010000100000006405164519785010000102003820038200382003820038
1002420037150006119687251001010100001010000502847680120018200372003718444318767100102010000202000020037200371110021109101010000100000006405165519785010000102003820038200382003820038

Test 3: Latency 1->3

Code:

  ushl v0.2s, v1.2s, v0.2s
  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 uop (01)cycle (02)03mmu table walk data (08)191e3f4e51schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd alu (9a)9fl1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715500061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000006973531622197910100001002003820038200382003820038
10204200371550006119687251010010010000100100005002847680020018200372008518422318745101002001000020020000200372003711102011009910010010000100000071021622197910100001002003820038200382003820038
10204200371550006119687251010010010000100100005002847680020018200372003718422318745101002001000020020000200372003711102011009910010010000100000071021622197910100001002003820038200382003820038
10204200371560006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000071021622197910100001002003820038200382003820038
1020420037155000611968725101001001000010010000500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010000015071021622197910100001002003820038200382003820038
1020420037155001596119687251010013510000100100005002847680020018200372003718422318745101002001000020020000200372003711102011009910010010000100200595171021722197910100001002003820038200382003820038
10204200371550006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000071021622197910100001002003820038200382003820038
10204200371551006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000071021622197910100001002003820038200382003820038
10204200371550006119687251010010010000100100005002847680020018200372003718422318745101002001000020020000200372003711102011009910010010000100000071021622197910100001002003820038200382003820087
10204200371550008219687251010010010000100100005002847680020018200372003718422318745101002001000020020000200372003711102011009910010010000100000071021622197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)031e1f3f4e51schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)6061696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd alu (9a)9fl1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)accfd0d2d5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002420037149006119687251001010100001010000502847680102001820037200371844431876710010201000020200002003720037111002110910101000010000064000216221978510000102003820038200382003820038
1002420037150006119687251001010100001010000502847680002001820037200371845931876710160201000020200002003720037111002110910101000010000064000216221978510000102003820038200382003820038
1002420037150006119687251001010100001010000502847680002001820037200371844431876710010201000020200002003720037111002110910101000010000064000216221978510000102003820038200382003820038
1002420037150606119687251001010100001010000502847680002001820037200371844431876710010201000020200002003720037111002110910101000010000064000216221978510000102003820038200382003820038
1002420037150006119687251001010100001010000502847680002001820037200371844831876710010201000020200002003720037111002110910101000010020064000216221978510000102003820038200382003820038
1002420037150006119687251001010100001010000502847680002001820037200371844431876710010201000020200002003720037111002110910101000010000064000216221978510000102008620086200852008520038
10024200831501328857619687251001010100001010000502847680102001820037200371844431876710010201000020200002008320085211002110910101000010400066200216221978510000102003820038200382003820038
1002420037150006119687251001010100001010000502847680002001820037200371844431876710010201000020200002003720037111002110910101000010000064000216221978510000102003820038200382003820038
1002420037150006119687251001010100001010000502847680002001820037200371844431876710010201000020200002003720037111002110910101000010000064000216221978510000102003820038200382003820038
1002420037150006119687251001010100001010000502850246002001820037200371844431876710010201000020200002003720037111002110910101000010000064000216221978510000102003820038200382003820038

Test 4: throughput

Count: 8

Code:

  ushl v0.2s, v8.2s, v9.2s
  ushl v1.2s, v8.2s, v9.2s
  ushl v2.2s, v8.2s, v9.2s
  ushl v3.2s, v8.2s, v9.2s
  ushl v4.2s, v8.2s, v9.2s
  ushl v5.2s, v8.2s, v9.2s
  ushl v6.2s, v8.2s, v9.2s
  ushl v7.2s, v8.2s, v9.2s
  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 uop (01)cycle (02)03mmu table walk instruction (07)1e3f51schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd alu (9a)9fl1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420060156004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001001051103162220035800001002003920039200392003920039
8020420038155004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000351102162220035800001002003920039200392003920039
8020420038155004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000051102162220035800001002003920039200392003920039
8020420038155004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000051102162220035800001002003920039200392003920039
8020420038156004025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000051102162220035800001002003920039200392003920039
8020420038155004025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001001051102162220035800001002003920039200392003920039
8020420038156006825801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001002051102162220035800001002003920039200392003920039
8020420038155094025801001008000010080000500640000020019200382003899733999680100200800962001600002003820038118020110099100100800001001351102162220035800001002003920039200392003920039
80204200381550184025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000051102162220035800001002003920039200392003920039
80204200381550023025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000051102162220035800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03l2 tlb miss instruction (0a)l2 tlb miss data (0b)18191e1f3a3f51schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)5f60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd alu (9a)9fl1d tlb access (a0)l1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)daddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200391550000000324258001010800001080000506400000120019200382003899963100188001020800002016000020038200381180021109101080000100000000502011160111020035080000102003920039200392003920039
8002420038160000000039258001010800001080000506400001120019200382003899963100188001020800002016000020038200381180021109101080000100000000502011160131220035080000102003920039200392003920039
800242003815500000003925800101080000108000050640000012001920038200389996310018800102080000201600002003820038118002110910108000010000001650502013160111120035080000102003920039200392003920039
80024200381550000000392580010108000010800005064000001200192003820038999631001880010208000020160000200382003811800211091010800001000010990502012160111220035080000102003920039200392003920039
8002420038155000000039258001010800001080000606400000120019200382008799963100188001020800002016000020038200381180021109101080000100000000502012160121320035080000102003920039200392003920039
8002420038155000000039258001010800001080000506400000120019200382003899963100188001020800002016000020038200381180021109101080000100000030502011160121320035080000102003920039200392003920039
8002420038155000000039258001010800001080000506400000120019200382003899963100188001020800002016000020038200381180021109101080000100000090502012160121320035080000102003920039200392003920039
8002420038155000000039258001010800001080000506400000120019200382003899963100188001020800002016000020038200381180021109101080000100000030502010160111320035080000102003920039200392003920039
8002420038156000000039258001010800001080000506400000120019200382003899963100188001020800002016000020038200381180021109101080000100000030502012160131120035080000102003920039200392003920039
8002420038155000000039258001010800001080000506400000120019200382003899963100188001020800002016000020038200381180021109101080000100001000502012160121220035080000102003920039200392003920039