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

UADDLP (vector, 4H)

Test 1: uops

Code:

  uaddlp v0.4h, 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)03l1i tlb fill (04)1e3a3f4e51schedule 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
10042037150026216862510001000100026452102018203720371571318951000100010002037203711100110000077416441786100020382038203820382038
10042037150026216862510001000100026452102018203720371571318951000100010002037203711100110000077416441786100020382038203820382038
10042037160026216862510001000100026452102018203720371571318951000100010002037203711100110000077416441786100020382038203820382038
10042037150026216862510001000100026452102018203720371571318951000100010002037203711100110000077416441786100020382038203820382038
10042037150026216862510001000100026452102018203720371571318951000100010002037203711100110000077416441786100020382038203820382038
10042037150026216862510001000100026452102018203720371571318951000100010002037203711100110000077416441786100020382038203820382038
10042037160026216862510001000100026452102018203720371571318951000100010002037203711100110000377416441786100020382038203820382038
10042037150026216862510001000100026452102018203720371571318951000100010002037203711100110000077416441786100020382038203820382038
10042037150026216862510001000100026452102018203720371571318951000100010002037203711100110000077416441786100020382038203820382038
10042037160026216862510001000100026452102018203720371571318951000100010002037203711100110000077416441786100020382038203820382038

Test 2: Latency 1->2

Code:

  uaddlp v0.4h, 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)03mmu table walk instruction (07)l2 tlb miss data (0b)191e1f3f4e51schedule 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)st unit uop (a7)l1d cache writeback (a8)acbranch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204200371500000061196862510100100100001001000062628475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000020071011611197910100001002003820038200382003820038
102042003715000000611968625101001001000010010000500284752102001820037200371842131874510100200100002001000020037200371110201100991001001000010000018071011611197910100001002003820038200382003820038
10204200371500000061196862510100100100001001000050028475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
10204200371500000061196862510100100100001001000050028475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
10204200371500000061196752510100100100001001000050028475211200182003720037184213187441010020010000200100002003720037111020110099100100100001000006071011611197910100001002003820038200382003820038
10204200371500000061196862510100100100001001000050028475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000006071011611197910100001002003820038200382003820038
10204200371500000061196862510100100100001001000050028475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000009071011611197910100001002003820038200382003820038
102042003715000000611968625101001251000010010000500284752112001820037200371842131874510100200100002001000020037200371110201100991001001000010000018071011611197910100001002003820038200382003820038
102042003715000000611968625101001001000010010000500284752112001820037200371842131874510100200100002001000020037200371110201100991001001000010000100710116111979125100001002003820038200382003820038
10204200371500000061196862510100100100001001000050028475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)0318191e1f3f4e51schedule 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)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024200371500000611968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010000006402162219786010000102003820038200382003820038
10024200371500000611968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010000006402162219786010000102003820038200382003820038
1002420037150002160611968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010000306402162219786010000102003820038200382003820038
10024200371500000611968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010004006402162219786010000102003820038200382003820038
10024200841500000611968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010000006402162219786010000102003820038200382003820038
10024200371500000611968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010000006402162219786010000102003820038200382003820038
10024200371500000611968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010000006402162219786010000102003820038200382003820038
10024200371500000611968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010000006402162219786010000102003820038200382003820038
10024200371500000611968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010000006402162219786010000102003820038200382003820038
10024200371500000611968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010000306402162219786010000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  uaddlp v0.4h, v8.8b
  uaddlp v1.4h, v8.8b
  uaddlp v2.4h, v8.8b
  uaddlp v3.4h, v8.8b
  uaddlp v4.4h, v8.8b
  uaddlp v5.4h, v8.8b
  uaddlp v6.4h, v8.8b
  uaddlp v7.4h, 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)031e3f51schedule 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)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042003815002925801081008008010080020500640132120019200382003899776998980120200800322008003220038200381180201100991001008000010000111511801620035800001002003920039200392003920039
802042003815032925801081008000810080020500640132120019200382003899776998980120200800322008003220038200381180201100991001008000010010111511801620035800001002003920039200392003920039
802042003815002925801081008000810080020500640132120019200382003899776998980120200800322008003220038200381180201100991001008000010000111511801620035800001002003920039200392003920039
802042003815002925801081008000810080020500640132120019200382003899776998980120200800322008012820038200381180201100991001008000010000111511801620035800001002003920039200392003920039
802042003815002925801081008000810080020500640132120019200382003899776998980120200800322008003220038200381180201100991001008000010000111511801620035800001002003920039200392003920039
802042003815002925801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010030111511801620035800001002003920039200392003920039
802042003815002925801081008000810080020500640132120019200382003899776998980120200800322008003220038200381180201100991001008000010000111511801620035800001002003920039200392003920039
802042003815002925801081008000810080020500640132120019200382003899776998980120200800322008003220038200381180201100991001008000010000111511801620035800001002003920039200392003920039
802042003815005025801081008000810080020500640132120019200382003899776998980120200800322008003220038200381180201100991001008000010000111511801620035800001002003920039200392003920039
802042003815002925801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010000111511801620035800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03l1i tlb fill (04)09l2 tlb miss data (0b)1e1f3f51schedule 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)a9acc2cfd2l1i tlb miss demand (d4)d5map dispatch bubble (d6)daddfetch restart (de)e0eaeb? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420039150110009342580010108000010800005064000002001920038200389996310018800102080000208000020038200381180021109101080000100000502101101601815200350080000102003920039200392003920039
8002420038155110002102580010108000010800005064000002001920038200389996310018800102080000208000020038200381180021109101080000100000502101141601711200350080000102003920039200392003920039
800242003815011000852580010108000010800005064000002001920038200389996310018800102080000208000020038200381180021109101080000100000502101161601417200350080000102003920039200392003920039
800242003815011000852580010108000010800005064000002001920038200389996310018800102080000208000020038200381180021109101080000100000502000171609162003521080000102003920039200392003920039
8002420038150110001312580010108000010800005064000002001920038200389996310018800102080000208000020038200381180021109101080000102500050210113160179200350080000102003920039200392003920039
800242003815011000448258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010000050210117160179200350080000102003920039200392003920039
80024200381501110085425800101080000108000050640000020019200382003899963100188001020800002080000200382003811800211091010800001014000502101171601717200350080000102003920039200392003920039
800242003815011000852580010108000010800005064000002001920038200389996310018800102080000208000020038200381180021109101080000100000502101171601716200350080000102003920039200392003920039
80024200381501100085258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010000050210181601714200350080000102003920039200392003920039
800242003815011000852580010108000010800005064000002001920038200389996310044800102080000208000020038200381180021109101080000100000502101171601717200350080000102003920039200392008920039