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

USUBL2 (vector, 2D)

Test 1: uops

Code:

  usubl2 v0.2d, 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 uop (01)cycle (02)03mmu table walk data (08)l2 tlb miss instruction (0a)1e3f4e51schedule 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)l1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
1004203716000611687251000100010002646801201820372037157231895100010002000203720371110011000000073216321787100020382038203820382038
1004203716000611687251000100010002646801201820372037157231895100010002000203720371110011000000073216221787100020382038203820382038
1004203715000611687251000100010002646800201820372037157231895100010002000203720371110011000000073216221787100020382038203820382038
1004203716000611687251000100010002646800201820372037157231895100010002000203720371110011000000073216221787100020382038203820382038
1004203716000611687251000100010002646801201820372037157231895100010002000203720371110011000000073216221787100020382038203820382038
1004203716000611687251000100010002646801201820372037157231895100010002000203720371110011000000073216221787100020382038203820382038
1004203715000611687251000100010002646800201820372037157231895100010002000203720371110011000000073216221787100020382038203820382038
1004203716000611687251000100010002646800201820372037157231895100010002000203720371110011000000073216221787100020382038203820382038
1004203715000611687251000100010002646800201820372037157231895100010002000203720371110011000000073216221787100020382038203820382038
1004203716000611687251000100010002646800201820372037157231895100010002000203720371110011000000073216221787100020382038203820382038

Test 2: Latency 1->2

Code:

  usubl2 v0.2d, 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 uop (01)cycle (02)03091e3f4e51schedule 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
1020420037156206119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037156006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100007101251119791100001002003820038200382003820038
1020420037156006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037155006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
10204200371550010319687251010010010000100100005002848963120018200372003718422318745101002001000020020000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037155006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037156006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
10204200371550012419687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037156006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037155006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100007101161119791100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)0318191e203f4e51schedule 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)9faccfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002420037150000022919687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100640316221978510000102003820038200612003820038
100242003715600006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100640216221978510000102003820038200382003820038
100242003715000006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100640216221978510000102003820038200382003820038
100242003715000006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100640216221978510000102003820038200382003820038
100242003714900006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100640216221978510000102003820038200382003820038
1002420037150000072619687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100640216221978510000102003820038200382003820038
100242003715000006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100640216221978510000102003820038200382003820038
100242003715000006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100640216221978510000102003820038200382003820038
100242003716000006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100640216221978510000102003820038200382003820038
100242003715000006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100640216221978510000102003820038200382003820038

Test 3: Latency 1->3

Code:

  usubl2 v0.2d, 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 uop (01)cycle (02)03mmu table walk data (08)l2 tlb miss data (0b)18191e1f3a3f4e51schedule 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)l1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715500000006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000000071011611197910100001002003820038200382003820038
102042003715500000006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000000071011611197910100001002003820038200382003820038
102042003715500000006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000000071011611197910100001002003820038200382003820038
102042003715500003006119687251010010010000100100005002847680120018200372003718422318745101002081000020020000200372003711102011009910010010000100000000071011611197910100001002003820038200382003820038
102042003715500000006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000000071011611197910100001002003820038200382003820038
1020420037155000000036719687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000000071011611197910100001002003820038200382003820038
102042003715500000006119687251010010010000100100005002847680020018200372003718422318745101002001000020020000200372003711102011009910010010000100000000071011611197910100001002003820038200382003820038
102042003715500000006119687251010010010000100100005002847680020018200372003718422318745101002001000020020000200372003711102011009910010010000100000000071011611197910100001002003820038200382003820038
102042003715500000006119687251010010010000100100005002847680020018200372003718422318745101002001000020020000200372003711102011009910010010000100000000071011611197910100001002003820038200382003820038
102042003715500000006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000100071011611197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03181e1f3f4e51schedule 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)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002420037155000611968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000640416331978510000102003820038200382003820038
1002420037156000611968725100101010000101000050284768002001820037200371844431876710010201000020200002003720078111002110910101000010010640316331978510000102003820038200382003820038
1002420037155000611968725100101010000101000050284768012001820037200371844431876710010201067020200002003720037111002110910101000010000640316331978510000102003820038200382003820038
1002420037155000611968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010003640316331978510000102003820038200382003820038
1002420037155000611968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010010640316331978510000102003820038200382003820038
1002420037156000611968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000640316331978510000102003820038200382003820038
100242003715501201561968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000640316331978510000102003820038200382003820038
1002420037156000611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000640316331978510000102003820038200382003820038
1002420037155000611968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000640316331978510000102003820038200382003820038
1002420037155000821968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000640316331978510000102003820038200382003820038

Test 4: throughput

Count: 8

Code:

  usubl2 v0.2d, v8.4s, v9.4s
  usubl2 v1.2d, v8.4s, v9.4s
  usubl2 v2.2d, v8.4s, v9.4s
  usubl2 v3.2d, v8.4s, v9.4s
  usubl2 v4.2d, v8.4s, v9.4s
  usubl2 v5.2d, v8.4s, v9.4s
  usubl2 v6.2d, v8.4s, v9.4s
  usubl2 v7.2d, 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 uop (01)cycle (02)03mmu table walk data (08)18191e1f3f51schedule 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)60696b6d6emap 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)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420057156000351068258010010080000100800005006400000200190200382003899733999680100200800002001600002003820038118020110099100100800001000000000511021611200350800001002003920039200392003920039
80204200381560000040258010010080000100800005006400000200190200382003899733999680100200800002001600002003820038118020110099100100800001000000000511011611200350800001002003920039200392003920039
80204200381560000040258010010080000100800005006400001200190200382003899733999680100200800002001600002003820038118020110099100100800001000000000511011611200350800001002003920039200392003920039
802042003815600021040258010010080000100800005006400001200190200382003899733999680100200800002001600002003820038118020110099100100800001000000000511011611200350800001002003920039200392003920039
802042014115510072040258010010080000100800005006400000200190200382003899733999680100200800002001600002003820038118020110099100100800001000000000511011611200350800001002003920039200392003920039
802042003815500039040258010010080000100800005006400000200190200382003899733999680305200800002001600002003820038118020110099100100800001000000000511021611200350800001002003920039200392003920039
802042003815500039040258010010080000100800005006400000200190200382003899733999680100200800002001600002003820038118020110099100100800001000000000511011612200350800001002003920039200392003920039
802042003815600015068258010010080000100800005006400001200190200382003899733999680100200800002001600002003820038118020110099100100800001000000100511011611200350800001002003920039200392003920039
802042003815500075040258010010080000100800005006400000200190200382003899733999680100200800002001600002003820038118020110099100100800001000000000511011611200350800001002003920039200392003920039
8020420038155000189029258010810080008100800205006401320200190200382003899776998980100200800002001600002003820038118020110099100100800001000002000511011611200350800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03mmu table walk data (08)0e1e3f51schedule 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)simd prf full (72)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)9faccfd0d2d5map dispatch bubble (d6)dbddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420039155000392580010108000010800005064000000200192003820038999603100188001020800002016000020038200381180021109101080000100502000121601042003580000102003920039200392003920039
80024200381550003925800101080000108000050640000002001920038200389996031001880010208000020160000200382003811800211091010800001005020005160452003580000102003920039200392003920039
80024200381550003925800101080000108000050640000002001920038200389996031001880010208000020160000200382003811800211091010800001005020005160952003580000102003920039200392003920039
8002420038156000514258001010800001080000506400000020019200382003899960310018800102080000201600002003820038118002110910108000010050200011160462003580000102003920039200392003920039
80024200381550003925800101080000108000050640000002001920038200389996031001880010208000020160000200382003811800211091010800001005020006160562003580000102003920039200392003920039
80024201101550003925800101080000108000050640000002001920038200389996031001880010208000020160000200382003811800211091010800001005020004160352003580000102003920039200392003920039
8002420038155000392580010108000010800005064000000200192003820038999603100188001020800002016000020038200381180021109101080000100502000101605112003580000102003920039200392003920039
800242003815500039258001010800001080000506400000020019200382003899960310018800102080000201600002003820038118002110910108000010050200051601052003580000102003920039200392003920039
80024200381550006025800101080000108011250640000152001920038200389996031001880010208000020160000200382003811800211091010800001005020054160662003580000102003920039200392003920039
800242003815500039258001010800001080000506400001520019200382003899960310018804032080000201600002003820038118002110910108000010050205011160742003580000102003920039200392003920039