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

CMHI (register, 8B)

Test 1: uops

Code:

  cmhi v0.8b, v0.8b, v1.8b
  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)03mmu table walk data (08)1e3f4e51schedule 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
100420371500611687251000100010002646802018203720371572318951000100020002037203711100110000073216111787100020382038203820382038
10042037150061168725100010001000264680201820372037157231895100010002000203720371110011000013273116111787100020382038203820382038
1004203715012611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371500611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371500611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371500611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
1004203715021611687251000100010002646802018203720371572318951000100020002037203711100110001073116111787100020382038203820382038
100420371500611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371506611687251000100010002646802018203720371572318951000100020002037203711100110002073116111787100020382038203820382038
100420371500611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038

Test 2: Latency 1->2

Code:

  cmhi v0.8b, v0.8b, v1.8b
  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)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)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204200371500000611968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010001071011611197910100001002003820038200382003820038
10204200371500001326119687251010010010000100100005002847680020018200372003718422271874510100200100002002000020037200371110201100991001001000010000371011611197910100001002003820038200382003820038
102042003715000001031968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010001071011611197910100001002003820038200382003820038
10204200371500000611968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010000071011611197910100001002003820038200382003820038
1020420037150000010391968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010001371011611197910100001002003820038200382003820038
102042003714900003151968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010000071011611197910100001002003820038200382003820038
102042003715000001451968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010000071011611197910100001002003820038200382003820038
10204200371500000611968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010001071011611197910100001002003820038200382003820038
10204200371500000821968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010000071011611197910100001002003820038200382003820038
10204200371500000611968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010000371011611197910100001002003820038200382003820038

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)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)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
100242003715000479196872510010101000010100005028476800200182003720037184440318767100102010000202000020037200371110021109101010000100640316331978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476801200182003720037184440318767100102010000202000020037200371110021109101010000100640316331978510000102003820038200382003820038
1002420037150013261196872510010101000010100005028476800200182003720037184440318767100102010000202000020037200371110021109101010000100640316331978510000102003820038200382003820038
100242003715000191196872510010101000010100005028476800200182003720037184440318767100102010000202000020037200371110021109101010000100640316331978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476801200182003720037184440318767100102010000202000020037200371110021109101010000100640316331978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476800200182003720037184440318767100102010000202000020037200371110021109101010000100640316331978510000102003820038200382003820038
100242003715000340196872510010101000010100005028476800200182003720037184440318767100102010000202000020037200371110021109101010000100640316331978510000102003820038200382003820038
100242003715000617196872510010101000010100005028476800200182003720037184440318767100102010000202000020037200371110021109101010000100640316331978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476800200182003720037184440318767100102010000202000020037200371110021109101010000100640316331978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476801200182003720037184440318767100102010000202000020037200371110021109101010000100640316331978510000102003820038200382003820038

Test 3: Latency 1->3

Code:

  cmhi v0.8b, v1.8b, 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)03mmu table walk data (08)l2 tlb miss data (0b)1f3f4e51schedule 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)9fld unit uop (a6)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715000061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007102161119791100001002003820038200382003820038
102042003714900061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715000061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
1020420037150000500196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715000061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715000061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715000061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007402161119791100001002003820038200382003820038
1020420037150000103196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
10204200371500010861196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000107101161119791100001002003820038200382003820038
102042003715000061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007102161119791100001002003820038200382003820038

1000 unrolls and 10 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)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)9fst unit uop (a7)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
100242003715000770196872510010101000010100005028476802001820037200371844431876710010201000020200002003720037111002110910101000010000640216221978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476802001820037200371844431876710010201000020200002003720037111002110910101000010000640316221978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476802001820037200371844431876710010201000020200002003720037111002110910101000010000640316221978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476802001820037200371844431876710010201000020200002003720037111002110910101000010000640316221978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476802001820037200371844431876710010201000020200002003720037111002110910101000010000640316221978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476802001820037200371844431876710010201000020200002003720037111002110910101000010000640216221978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476802001820037200371844431876710010201000020200002003720037111002110910101000010000640316221978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476802001820037200371844431876710010201000020200002003720037111002110910101000010000640316221978510000102003820038200382003820038
10024200371500061196872510022101000010100005028476802001820037200371844431876710010201000020200002003720037111002110910101000010000640316221978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476802001820037200371844431876710010201000020200002003720037111002110910101000010000640316221978510000102003820038200382003820038

Test 4: throughput

Count: 8

Code:

  cmhi v0.8b, v8.8b, v9.8b
  cmhi v1.8b, v8.8b, v9.8b
  cmhi v2.8b, v8.8b, v9.8b
  cmhi v3.8b, v8.8b, v9.8b
  cmhi v4.8b, v8.8b, v9.8b
  cmhi v5.8b, v8.8b, v9.8b
  cmhi v6.8b, v8.8b, v9.8b
  cmhi v7.8b, v8.8b, v9.8b
  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)033f51schedule 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)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042003815040258010010080000100800005006400000200192003820038997303999680100200800002001600002003820038118020110099100100800001000051103162220035800001002003920039200392003920039
802042003815040258010010080000100800005006400000200192003820038997303999680100200800002001600002003820038118020110099100100800001000051102162220035800001002003920039200392003920039
802042003815040258010010080000100800005006400000200192003820038997303999680100200800002001600002003820038118020110099100100800001000051102162320035800001002003920039200392003920039
802042003815040258010010080000100800005006400000200192003820038997303999680100200800002001600002003820038118020110099100100800001000051102162220035800001002003920039200392003920039
802042003814982258010010080000100800005006400000200192003820038997303999680100200800002001600002003820038518020110099100100800001000051102162220035800001002003920039200392003920039
8020420038150705258010010080000100800005006400001200192003820038997303999680100200800002001600002003820038118020110099100100800001000051102162220035800001002003920039200392003920039
802042003815040258010010080000100800005006400000200192003820038997303999680100200800002001600002003820038118020110099100100800001000051102162220035800001002003920039200392003920039
802042003815040258010010080000100800005006400000200192003820038997303999680100200800002001600002003820038118020110099100100800001000051102162220035800001002003920039200392003920039
802042003815040258010010080000100800005006400001200192003820038997303999680100200800002001600002003820038118020110099100100800001001051102162220035800001002003920039200392003920039
802042003815040258010010080000100800005006400000200192003820038997303999680100200800002001600002003820038418020110099100100800001000051102162220035800001002003920039200392003920039

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)191e3f51schedule 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)9fbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cfd2d5map dispatch bubble (d6)d9dadbddfetch restart (de)e0eaeb? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200481500003925800101080000108000050640000002001920038200389996310018800102080000201600002003820038118002110910108000010005020071600057200350080000102003920039200392003920039
800242003815000573925800101080000108000050640000002001920038200389996310018800102080000201602642003820038118002110910108000010005020051600077200350080000102003920039200392003920039
800242003815000076725800101080000108000050640000002001920038200389996310018800102080000201600002003820038118002110910108000010005020071600077200350080000102003920039200392003920039
80024200381500003925800101080000108000050640000002001920038200389996310018800102080000201600002003820038118002110910108000010005020071600075200350080000102003920039200392003920039
80024200381500003925800101080000108000050640000002001920038200389996310018800102080000201600002003820038118002110910108000010005020071600077200350080000102003920039200392003920039
80024200381500003925800101080000108000050640000002001920038200389996310018800102080000201600002003820038118002110910108000010005020071600075200350080000102003920039200392003920039
80024200381500003925800101080000108000050640000002001920038200389996310018800102080000201600002003820038118002110910108000010005020071600077200350080000102003920039200392003920039
800242003815000017625800101080000108000050640000002001920038200389996310018800102080000201600002003820038118002110910108000010005037051600057200350080000102003920039200392003920039
80024200381500003925800101080000108000050640000002001920038200389994310018800102080000201600002003820038118002110910108000010005020071600075200350580000102003920039200392003920039
80024200381500003925800101080000108000050640000002001920038200389996310018800102080000201600002003820038118002110910108000010005020051600057200350080000102003920039200392003920039