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

CMHS (register, 16B)

Test 1: uops

Code:

  cmhs v0.16b, v0.16b, v1.16b
  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)ld unit uop (a6)l1d cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
10042037150611687251000100010002646801201820372037157231895100010002000203720371110011000100073216221787100020382038203820382038
10042037159611687251000100010002646801201820372037157231895100010002000203720371110011000000073216221787100020382038203820382038
10042037150611687251000100010002646801201820372037157231895100010002000203720371110011000000073216221787100020382038203820382038
10042037150611687251000100010002646801201820372037157231895100010002000203720371110011000000073216221787100020382038203820382038
10042037160611687251000100010002646801201820372037157231895100010002000203720371110011000000073216221787100020382038203820382038
100420371506116872510001000100026468012018203720371572318951000100020002037203711100110000015773216221787100020382038203820382038
10042037150611687251000100010002646801201820372037157231895100010002000203720371110011000000073216221787100020382038203820382038
10042037150611687251000100010002646801201820372037157231895100010002000203720371110011000000073216221787100020382038203820382038
10042037153611687251000100010002646801201820372037157231895100010002000203720371110011000000073216221787100020382038203820382038
10042037150611687251000100010002646801201820372037157231895100010002000203720371110011000050073216221787100020382038203820382038

Test 2: Latency 1->2

Code:

  cmhs v0.16b, v0.16b, v1.16b
  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)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)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 tlb access (a0)l1d cache writeback (a8)acbranch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204200371500061196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
10204200371500661196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
102042003715000611968725101001001000010010000500284768012001820037200371842203187451010020010000200200002003720037111020110099100100100001000278071011611197910100001002003820038200382003820038
10204200371500010231968725101001001000010010000500284768012001820037200371842203187451010020010000200200002003720037111020110099100100100001000000710116111979124100001002003820038200382003820038
102042008415000576196872510100100100001001000050028476800200182003720037184220318745101002001000020020000200372003711102011009910010010000100200071011611197910100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476800200182003720037184220318745101002001000020020000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476800200182003720037184220318745101002001000020020000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038

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)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
1002420037150061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
1002420037150061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
1002420217150061196872510010101000010100005028476800200182003720037184443187861001020100002020000200372003711100211091010100001003640216221978510000102003820038200382003820038
10024200371500251196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
1002420037150061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
1002420037150061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
1002420037150061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
1002420037150061196872510010101000010100005028476801200182008420037184443187671001020100002020000200372003711100211091010100001010640216221978510000102003820038200382003820038
1002420037150061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
1002420037150661196872510010101000010100005028476801200182003720037184443187671001020100002020000200842003711100211091010100001020640216221978510000102003820038200382003820038

Test 3: Latency 1->3

Code:

  cmhs v0.16b, v1.16b, v0.16b
  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)031e3a3f4e51schedule 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)696b6d6emap 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? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204200371500061196872510100100100001001000050028476802001802003720037184223187451010020010000200200002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
102042003715000166196872510100100100001001000050028476802001802003720037184223187451010020010000200200002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476802001802003720037184223187451010020010000200200002003720037111020110099100100100001001071011611197910100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476802001802003720037184223187451010020010000200200002003720037111020110099100100100001001371011611197910100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476802001802003720037184223187451010020010000200200002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476802001802003720037184223187451010020010000200200002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476802001802003720037184223187451010020010000200200002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476802001802003720037184223187451010020010000200200002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476802001802003720037184223187451010020010000200200002003720037111020110099100100100001000371011611197910100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476802001802003720037184223187451010020010000200200002003720037111020110099100100100001000071011611197910100001002003820038200382003820038

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)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)st unit uop (a7)l1d cache writeback (a8)a9acc2cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002420037150000000006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100000000006402162219785010000102003820038200382003820038
1002420037150000000006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100000000006402162219785010000102003820038200382003820038
1002420037150000000006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100000000006402162219785010000102003820038200382003820038
1002420037150000000006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100000100006402162219785010000102008520038200382003820038
1002420037150000000006119687251001010100001010000502847680020018200842003718448318767100102010000202000020037200371110021109101010000100000000006402162219785010000102003820038200382003820038
1002420037150000000006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100000000006402162219785010000102003820038200382003820038
1002420037150000000006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100000000006402162219785010000102003820038200382003820038
10024200371500000000010319687491001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100000000006402162219785010000102003820038200382003820038
1002420037150000000006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100000100006402162219785010000102003820038200382003820038
1002420037150000000006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100000000006402162219785010000102003820038200382003820038

Test 4: throughput

Count: 8

Code:

  cmhs v0.16b, v8.16b, v9.16b
  cmhs v1.16b, v8.16b, v9.16b
  cmhs v2.16b, v8.16b, v9.16b
  cmhs v3.16b, v8.16b, v9.16b
  cmhs v4.16b, v8.16b, v9.16b
  cmhs v5.16b, v8.16b, v9.16b
  cmhs v6.16b, v8.16b, v9.16b
  cmhs v7.16b, v8.16b, v9.16b
  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)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)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)a9accdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042004915000402580100100800001008000050064000020019200382003899730399968010020080000200160000200382003811802011009910010080000100000051103162220035800001002003920039200392003920039
802042003815000402580100100800001008000050064000020019200382008999730399968010020080000200160000200382003811802011009910010080000100000051102162220035800001002003920039200392003920039
802042003815000402580100100800001008000050064000020019200382003899730399968010020080000200160000200382003811802011009910010080000100000051103162220035800001002003920039200392003920039
8020420038150002562580100100800001008000050064000020019200382003899730399968010020080000200160000200382003811802011009910010080000100000051102162220035800001002003920039200392003920039
802042003815000402580100100800001008000050064000020019200382003899730399968010020080000200160000200382003811802011009910010080000100000051102162220035800001002003920039200392003920039
802042003815000402580100100800001008000050064000020019200382003899730399968010020080000200160000200382003811802011009910010080000100000051102162220035800001002003920039200392003920039
802042003815000402580100100800001008000050064000020019200382003899730399968010020080288200160000200382003811802011009910010080000100000051102162220035800001002003920039200392003920039
802042003815000402580100100800001008000050064000020019200382003899730399968010020080000200160000200382003811802011009910010080000100000151102162220035800001002003920039200392003920039
802042003815000402580100100800001008000050064000020019200382003899730399968010020080000200160000200382003811802011009910010080000100000051102162320035800001002003920039200392003920039
802042003815000612580100100800001008000050064000020019200382003899730399968010020080000200160000200382003811802011009910010080000100000051102162220035800001002003920039200392003920039

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)191e1f3a3f51schedule 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)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 tlb access (a0)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200471500000039258001010800001080000506400001200190200382003899960310018800102080000201600002003820038118002110910108000010000502010167102003580000102003920039200392003920039
8002420038150000001042580010108000010800005064000012001902003820038999603100188001220800002016000020038200381180021109101080000100005020111612112003580000102003920039200392003920039
80024200381500000039258001010800001080000506400001200190200382003899960310018800122080392201600002003820038118002110910108000010000502091614122003580000102003920039200392003920039
80024200381500000039258001010800001080000506400001200190200382003899960310018800102080000201600002003820038118002110910108000010000502071612112003580000102003920039200392003920039
8002420038150000003925800101080000108000050640000120019020038200389996031001880012208000020160000200382003811800211091010800001000050206167112003580000102003920039200392003920039
8002420038150000880392580010108000010800005064000012001902003820038999603100188001220800002016019620038200381180021109101080000100005020121612112003580000102003920039200392003920039
800242003815000900392580010108000010800005064000002001902003820038999603100188001220800002016000020038200381180021109101080000100005020101611102003580000102003920039200392003920039
80024200381500012008125800101080000108000050640000120019020038200389996031001880010208000020160000200382003811800211091010800001001050206169102003580000102003920039200392003920039
800242003815000000392580010108000010800005664077012001902003820038999603100188001020800002016000020038200381180021109101080000100005020131611112003580000102003920039200392003920039
800242003815000000622580010108000010800005064000012001902003820038999603100188001020800002016000020038200381180021109101080000100005020101611112003580000102003920039200392003920039