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

USUBL (vector, 2D)

Test 1: uops

Code:

  usubl v0.2d, 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)696d6emap 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 cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
10042037150611687251000100010002646802018203720371572318951000100020002037203711100110000373116111787100020382038203820382038
10042037160941687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
10042037160611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
10042037160611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
10042037150611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371601031687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
10042037160611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
10042037160611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371612611687251000100010002646802018203720371572318951000100020002037203711100110001373116111787100020382038203820382038
10042037160611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038208520382038

Test 2: Latency 1->2

Code:

  usubl v0.2d, 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)03mmu table walk data (08)l2 tlb miss data (0b)18191e1f3f4e51schedule 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)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)ec? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204200371550000006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000000710216221979100100001002003820038200382003820038
102042003715500000025119676251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000000710216221979100100001002003820038200382007120038
102042003716100000040219687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000000710216221979100100001002003820038200382003820038
10204200371560000006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000000710216221979100100001002003820038200382003820038
10204200371550000009919687451010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000000710216221979100100001002003820038200382003820038
1020420037155000000611968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010000000108710216221979100100001002003820038200382003820038
10204200371550000006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000000710216221979100100001002003820038200382003820038
10204200371550000006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000000710216221979100100001002003820038200382003820038
10204200371550000006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000000710216221979100100001002003820038200382003820038
10204200371560000006119687251010010010000100100005502848963120018200372003718422318745101002001000020020000200372003711102011009910010010000100000000710216111979100100001002003820038200382003820038

1000 unrolls and 10 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)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)9fl1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002420037150155551968725100101010000101000050284768012001820037200841844403187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
10024200371500611968725100101010000101000050284768012001820037200371844403187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
10024200371500611968725100101010000101000050284768002001820037200371844403187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
10024200371500611968725100101010000101000050284768012001820037200371844403187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
10024200371500611968725100101010000101000050284768002001820037200371844403187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
10024200371500611968725100101010000101000050284768012001820179200371844403187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
10024200841500611968745100101010000101000050284768012001820037200371844403187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
10024200371500611968725100101010000101000050284768002001820037200371844403187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
10024200371500611968725100101010000101000050284768002001820037200371844403187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
10024200371506611968725100101010000101000050284768002001820037200371844403187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038

Test 3: Latency 1->3

Code:

  usubl v0.2d, 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)l2 tlb miss instruction (0a)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)696d6emap 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)acbranch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715502061196872510100100100001001000050028476802001820037200371842231874510100200100002002000020037200371110201100991001001000010000007102162219791100001002003820038200382003820038
10204200371560221611968725101001001000010010000500284768020018200372003718422318745101002001000020020000200372003711102011009910010010000100005107102162219791100001002003820038200382003820038
102042003716102061196872510100100100001001000050028476802001820037200371842231874510100200100002002000020037200371110201100991001001000010000007102162219791100001002003820038200382003820038
102042003715502061196872510100100100001001000050028476802001820037200371842231874510100200100002002000020037200371110201100991001001000010000007102162219791100001002003820038200382003820038
102042003715602061196872510100100100001001000050028476802001820037200371842231874510100200100002002000020037200371110201100991001001000010000007102162219791100001002003820038200382003820038
102042003715502061196872510100100100001001000050028476802001820037200371842231874510100200100002002000020037200371110201100991001001000010000007102162219791100001002003820038200382003820038
102042003715502061196872510100100100001001000050028476802001820037200371842231874510100200100002002000020037200371110201100991001001000010000007102162219791100001002003820038200382003820038
102042003715602061196872510100100100001001000050028476802001820037200371842231874510100200100002002000020037200371110201100991001001000010000007102162219791100001002003820038200382003820038
102042003715502079196872510100100100001001000050028476802001820037200371842231874510100200100002002000020037200371110201100991001001000010000007102162219791100001002003820038200382003820038
102042003715502061196872510100100100001001000050028476802001820071200371842231874510100200100002002000020037200371110201100991001001000010000007102162219791100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03mmu table walk instruction (07)mmu table walk data (08)l2 tlb miss instruction (0a)l2 tlb miss data (0b)1e3a3f4e51schedule 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
1002420037155101012272196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000644101610101978510000102003820038200382003820038
1002420037156101012272196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000644101611101978510000102003820038200382003820038
10024200371551010926621968725100101110000101000050284768002001820037200371844431876710010201000020200002003720037211002110910101000010006441016581978510000102003820038200382003820038
100242003715610100268196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000644101610101978510000102003820038200382003820038
1002420037155101002638196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000644101610101978510000102003820038200382003820038
100242003715510100268196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000644101610101978510000102003820038200382003820038
10024200371561010026819687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100064451610101978510000102003820038200382003820038
100242003715510110268196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000644101610101978510000102003820038200382003820038
10024200371551010027319687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100064451610101978510000102003820038200382003820038
100242003715510109268196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000644101610101978510000102003820038200382003820038

Test 4: throughput

Count: 8

Code:

  usubl v0.2d, v8.2s, v9.2s
  usubl v1.2d, v8.2s, v9.2s
  usubl v2.2d, v8.2s, v9.2s
  usubl v3.2d, v8.2s, v9.2s
  usubl v4.2d, v8.2s, v9.2s
  usubl v5.2d, v8.2s, v9.2s
  usubl v6.2d, v8.2s, v9.2s
  usubl v7.2d, 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 data (08)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)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)ld unit uop (a6)l1d cache writeback (a8)accfd5map dispatch bubble (d6)dbddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200591560040258010010080000100800005006400000200190200382003899733999680100200800002001600002003820038118020110099100100800001000000511021601120035800001002003920039200392003920039
80204200381550068258010010080000100800005006400000200193200382003899733999680100200800002001600002003820038118020110099100100800001000000511011601120035800001002003920039200392003920039
80204200381550040258010010080000100800005006400000200190200382003899733999680100200800002001600002003820038118020110099100100800001000020511011651120035800001002003920039200392003920039
80204200381550040258010010080000100800005006400000200190200382003899733999680100200800002001600002003820038118020110099100100800001000000511011601120035800001002003920039200392003920039
80204200381550040258010010080000100800005006400001200190200382003899733999680100200800002001600002003820038118020110099100100800001000000511011601120035800001002003920039200392003920039
80204200381550040258010010080000100800005006400001200190200382003899733999680100200800002001600002003820038118020110099100100800001000000511011601120035800001002003920039200392003920039
80204200381550040258010010080000100800005006400000200190200382003899733999680100200800002001600002003820038118020110099100100800001000010511011601120035800001002003920039200392003920039
80204200381550040258010010080000100800005006400000200190200382003899733999680100200800002001600002003820038118020110099100100800001000000511011601120035800001002003920039200392003920039
80204200381550040258010010080000100800005006400000200190200382003899733999680100200800002001600002003820038118020110099100100800001000000511011601120035800001002003920039200392003920039
80204200381550040258010010080000100800005006400000200190200382003899733999680100200800002001600002003820038118020110099100100800001000000511011601120035800001002003920090200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03l2 tlb miss data (0b)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)acbranch mispred nonspec (cb)cfd5map dispatch bubble (d6)daddfetch restart (de)e0ea? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420050156003925800101080000108000050640000020019200382003899963100188001020800002016000020038200381180021109101080000100005020111606220035080000102003920039200392003920039
800242003815500632580010108000010800005064000002001920038200389996310018800102080000201600002003820038118002110910108000010100502061602620035080000102003920039200392003920039
800242003815503392580010108000010800005064000002001920038200389996310018800102080000201600002003820038118002110910108000010060502021602220035080000102003920039200392003920039
800242003815500812580010108000010800005064000002001920038200389996310018800102080000201600002003820038118002110910108000010000502021602220035080000102024220039200392003920039
800242003815500392580010108000010800005064000002001920038200389996310018800102080000201600002003820038118002110910108000010000502021602220035080000102003920039200392003920039
800242003815500392580010108000010800005064000002001920038200389996310018800102080000201600002003820038118002110910108000010000502021606620035080000102003920039200392003920039
800242003815500392580010108000010800005064000002001920038200389996310018800102080000201600002003820038118002110910108000010000502031603620035080000102003920039200392003920039
800242003815500392580010108000010800005064000002001920038200389996310018800102080000201600002003820038118002110910108000010000502061603220035080000102003920039200392003920039
800242003815500392580010108000010800005064000002001920038200389996310018800102080000201600002003820038118002110910108000010000502061603220035080000102003920088200872003920039
800242003815500392580010108000010800005064000002001920038200389996310018800102080000201600002003820038118002110910108000010000502061602620035080000102003920039200392003920039