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

CLS (vector, 8B)

Test 1: uops

Code:

  cls v0.8b, v0.8b
  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)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
1004203715016616862510001000100026452102018203720371571318951000100010002037203711100110000073316221786100020382038203820382038
100420371506116862510001000100026452102018203720371571318951000100010002037203711100110000073316331786100020382038203820382038
100420371506116862510001000100026452112018203720371571318951000100010002037203711100110000073316331786100020382038203820382038
100420371506116862510001000100026452102018203720371571318951000100010002037203711100110000073316331786100020382038203820382038
100420371506116862510001000100026452102018203720371571318951000100010002037203711100110000073316331786100020382038203820382038
100420371506116862510001000100026452102018203720371571318951000100010002037203711100110000073316331786100020382038203820382038
100420371506116862510001000100026452102018203720371571318951000100010002037203711100110001073416331786100020382038203820382038
100420371506116862510001000100026452102018203720371571318951000100010002037203711100110000073316331786100020382038203820382038
100420371606116862510001000100026452102018203720371571318951000100010002037203711100110000073316331786100020382038203820382038
100420371506116862510001000100026452102018203720371571318951000100010002037203711100110001073316331786100020382038203820382038

Test 2: Latency 1->2

Code:

  cls v0.8b, v0.8b
  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)03191e3f4e51schedule 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)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
1020420037150006119686251010010010000100100005002847521200182003720037184210318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037150006119686251010010010000100100005002847521200182003720037184210318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037150006119686251010010010000100100005002847521200182003720037184210318765101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037150006119686251010010010000100100005002847521200182003720037184210318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820085
1020420037150006119686251010010010000100100005002847521200182003720037184210318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037150006119686251010010010000100100005002847521200182003720037184210318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
10204200371500061196862510100100100001001000050028475212001820037200371842102618745101002001000020010000200372003711102011009910010010000100107101161119791100001002003820038200382003820038
1020420078150006119686251010010010000100100005002847521200182003720037184210318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037150006119686251010010010000100100005002847521200182003720037184210318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037150006119686251010010010000100100005002847521200182003720037184210318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038

1000 unrolls and 10 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)st unit uop (a7)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024200371500000000611968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010000000006403163319786010000102003820038200382003820038
10024200371500000000611968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010000000006403163319786010000102003820038200382003820038
10024200371500000000611968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010000000006402163319786010000102003820038200382003820038
10024200371500000000611968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010000000006403163319786010000102003820038200382003820038
10024200371500000000611968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010000000006403163319786010000102003820038200382003820038
10024200371500000000611968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010000000006403163319786010000102003820038200382003820038
100242003715000000001031968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010000000306403163319848010000102003820038200382003820085
100242003715000000001451968625100101010012101015250284752112001820084200841844331876710010201000020100002003720037111002110910101000010000010006403163319786010000102003820038200382003820038
10024200371500000000611968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010000010306403163319786010000102003820038200382003820038
10024200371500000000611968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010000000006403163319786010000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  cls v0.8b, v8.8b
  cls v1.8b, v8.8b
  cls v2.8b, v8.8b
  cls v3.8b, v8.8b
  cls v4.8b, v8.8b
  cls v5.8b, v8.8b
  cls v6.8b, v8.8b
  cls v7.8b, v8.8b
  movi v8.16b, 9

(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)l2 tlb miss instruction (0a)1e3a3f51schedule 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)9facbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200591502202362580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000111512210169920035800001002003920039200392003920039
80204200381502202362580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000111512291612920035800001002003920039200392003920039
8020420038150220236258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100011151224164920035800001002003920039200392003920039
80204200381502202769258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100011151224164920035800001002003920039200392003920039
80204200381502202773258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100011151229169920035800001002003920039200392003920039
8020420038150220236258010810080008100800205006401321200192003820038997769989801202008003220080032200382003821802011009910010080000100011151229169920035800001002003920039200392003920039
80204200381502202362580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000111512291610920035800001002003920039200392003920039
80204200381502202362580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000111513891610920035800001002003920039200392003920039
8020420038150220236258010811480008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100011151229169920035800001002003920039200392003920039
8020420038150220236258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100011151229169920035800001002003920039200392003920039

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)l2 tlb miss data (0b)0f18191e1f3f51schedule 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)a9acc2cfd0d2l1i cache miss demand (d3)d5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242005115000200003925800101080000108000050640000020019200382003899963100188001020800002080000200382003811800211091010800001000000005020090116112003580000102003920039200392003920039
800242003815000000008125800101080000108000050640000020019200382003899963100188001020800002080000200382003811800211091010800001000000005020070116112003580000102003920039200392003920039
800242003815000000003925800101080000108000050640000020019200382003899963100188001020800002080000200382003811800211091010800001000000005020070116112003580000102003920039200392003920039
800242003815000000003925800101080000108000050640000020019200382003899963100188001020800002080132200382003811800211091010800001000010005020080116112003580000102003920039200392003920039
800242003815000000003925800101080000108000050640000120019200382003899963100188001020800002080000200382003811800211091010800001000000305020070116112003580000102003920039200392003920039
800242003815000000003925800101080000108000050640000120019200382003899963100188001020800002080000200382003811800211091010800001000000005020091116112003580000102003920039200392003920039
800242003815000000003925800101080000108000050640000120019200382003899963100188001020800002080000200382003811800211091010800001000000005020070116112003580000102003920039200392003920039
800242003815000000003925800101080000108000050640000020019200382003899963100188001020800002080000200382003811800211091010800001000000005020081116112003580000102003920039200392003920039
8002420038150000000033125800101080000108000050640000020019200382003899963100188001020800002080000200382003811800211091010800001000000005020080116112003580000102003920039200392003920039
800242003815000000003925800101080000108000050640000020019200382003899963100188001020800002080000200382003811800211091010800001000000005020080116112003580000102003920039200392003920039