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, 8B)

Test 1: uops

Code:

  cmhs 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)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
100420371606116872510001000100026468002018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371506116872510001000100026468012018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371506116872510001000100026468002018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371506116872510001000100026468002018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371506116872510001000100026468002018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371506116872510001000100026468012018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371508416872510001000100026468002018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371506116872510001000100026468012018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371506116872510001000100026468002018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371506116872510001000100026468012018203720371572318951000100020002037203711100110000073116111787100020382038203820382038

Test 2: Latency 1->2

Code:

  cmhs 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)033f4e51schedule 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
102042003715061196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100207101161119791100001002003820038200382003820038
102042003715061196872510100100100001001000050028476800200182003720037184220318765101002001000020020000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
102042003715061196872510100100100001001000050028476800200182003720037184220318745101002001000020020000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
102042003715061196872510100100100001001000050028476800200182003720037184220318745101002001000020020000200372003711102011009910010010000100007101161119791100001002003820132200382003820038
102042003715061196872510100100100001001000050028476800200182003720037184220318745101002001000020020000200372003711102011009910010010000100207101161119791100001002003820038200382003820038
10204200371506119687251010010010000100100005002847680020018200372003718422031874510100200100002002000020037200371110201100991001001000010001027101161119791100001002003820038200382003820038
1020420037150611968725101001001000010010000500284768002001820037200371842203187451010020010000200200002003720037111020110099100100100001000907101161119791100001002003820038200382003820038
1020420037150611968725101001001000010010000500284768002001820037200371842203187451010020010000200200002003720037111020110099100100100001000397101161119791100001002003820038200382003820038
102042003715061196872510100100100001001000050028476800200182003720037184220318745101002001000020020000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
102042003715061196872510100100100001001000050028476800200182003720037184220318745101002001000020020000200372003711102011009910010010000100007101171119825100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03mmu table walk data (08)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)9fld unit uop (a6)l1d cache writeback (a8)a9acc2branch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024200371500000611968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000000640216221978510000102003820038200382003820038
10024200371500000611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000000640216221978510000102003820038200382003820038
10024200371500000611968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000000640216221978510000102003820038200382003820038
10024200371500000611968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000000640216221978510000102003820038200382003820038
100242003715010001031968725100101010000101000050284768012001820083200371844431876710010201000020200002003720037111002110910101000010000000640216221978510000102003820038200382003820038
100242003715000004411968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000000640216221978510000102003820038200382003820038
10024200371500000611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010040000640216221978510000102003820038200382003820038
10024200371500000611968725100101010000101000050284768012001820037200371844471876710010201000020200002003720037211002110910101000010000000640216221978510000102003820038200382003820038
10024200371500000611968744100221010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010002196800640216221982410000102003820038200382003820038
10024200371500000611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000000640216221978510000102003820038200382003820038

Test 3: Latency 1->3

Code:

  cmhs 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)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 miss (a1)ld unit uop (a6)l1d cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204200371500000061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
10204200371500000061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
102042003715000000251196872510100100100001001000050028489630200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
1020420037150000204061196872510100100100001001000050028476801200182003720037184223187451028020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
1020420037150000291061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000000371011611197910100001002003820038200382003820038
1020420037150000678061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
1020420037150000249061196872510100100100001001000050028476800200182003720037184223187451010020010000200203322003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
10204200371500000061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
10204200371500000061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000030071011611197910100001002003820038200382003820038
10204200371500000061196652510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000000371011611197910100001002003820038200382003820038

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)18191e3f4e51schedule 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)accdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002420037150000039611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000640216221978510000102003820038200382003820038
1002420037150000015611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010030640216221978510000102003820038200382003820038
100242003715000000611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000640216221978510000102003820038200382003820038
100242003715000000611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010002640216221978510000102003820038200382003820038
100242003715000000611968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000640216221978510000102003820038200382003820083
1002420037150000015611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000640216221978510000102003820038200382003820038
1002420037150000012611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000640216221978510000102003820038200382003820038
100242003715000000861968725100101010000101000050284768002001820037200371844431878810010201000020200002003720037111002110910101000010000640216221978510000102003820038200382003820038
100242003715000000611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037211002110910101000010000640216221978510000102007420038200382003820086
100242003715000000611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000640216221978510000102003820038200382003820038

Test 4: throughput

Count: 8

Code:

  cmhs v0.8b, v8.8b, v9.8b
  cmhs v1.8b, v8.8b, v9.8b
  cmhs v2.8b, v8.8b, v9.8b
  cmhs v3.8b, v8.8b, v9.8b
  cmhs v4.8b, v8.8b, v9.8b
  cmhs v5.8b, v8.8b, v9.8b
  cmhs v6.8b, v8.8b, v9.8b
  cmhs 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)03191e3f51schedule 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 cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200381500040258010010080000100800005006400000200190200382003899733999680100200800002001600002003820038118020110099100100800001000051103163220044800001002003920039200392003920039
80204200381500040258010010080000100800005006400000200190200382003899733999680100200800002001600002003820038118020110099100100800001000051102162220035800001002003920039200392003920039
802042003815001540258010010080000100800005006400000200190200382003899733999680100200800002001600002003820038118020110099100100800001000051102162220035800001002003920039200392003920039
80204200381500040258010010080000100800005006400000200190200382003899733999680100200800002001600002003820038118020110099100100800001000051102162220035800001002003920039200392003920039
802042003815002140258010010080000100800005006400000200190200382003899733999680100200800002001600002003820038118020110099100100800001000051102162220035800001002003920039200392003920039
80204200381500040258010010080000100800005006400000200190200882003899733999680100200800002001600002003820038118020110099100100800001000051102162220035800001002003920039200392003920039
80204200381500040258010010080000100800005006400000200190200382003899733999680100200800002001600002003820038118020110099100100800001000051352162220035800001002003920039200392003920039
80204200381500040528010010080000100800005006400000200190200382003899733999680100200800002001600002003820038118020110099100100800001000051102162220035800001002003920039200392003920039
80204200381500040528010010080000100800005006400000200190200382003899733999680100200800002001600002003820038118020110099100100800001000051102162220035800001002003920039200392003920039
80204200381500040258010010080000100800005006400000200190200382003899733999680100200800002001600002003820038118020110099100100800001000051102162220035800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03mmu table walk instruction (07)181e3f51schedule 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
8002420047150000392580010108000010800005064000020019200382003899960310018800102080000201600002003820038118002110910108000010005020416242003580000102003920039200392003920039
80024200381500015392580010108000010800005064000020019200382003899960310018800102080000201600002003820038118002110910108000010005020216422003580000102003920039200392003920039
8002420038150000392580010108000010800005064000020019200382003899960310046800102080000201600002003820038118002110910108000010005020416442003580000102003920039200392003920039
8002420038150000392580010108000010800005064000020019200382003899960310018800102080000201600002003820038118002110910108000010005020216242003580000102003920039200392003920039
80024200381500004192580010108000010800005064000020019200382003899960310018800102080000201600002003820038118002110910108000010005020416422003580000102003920039200392003920039
8002420038150000392580010108000010800005064000020019200382003899960310018800102080000201600002003820038118002110910108000010005020416422003580000102003920039200392003920039
8002420038149000392580010108000010800005064000020019200382003899960310018800102080000201600002003820038118002110910108000010005020416422003580000102003920039200392003920039
8002420038150000392580010108000010800005064000020019200382009799960310018800102080000201600002003820038118002110910108000010005020416242003580000102003920039200392003920039
8002420038150000392580010108000010800005064000020019200382003899960310018800102080000201600002003820038118002110910108000010005020416422003580000102003920039200392003920039
80024200381500018442580010108000010800005064000020019200382003899960310018800102080000201600002003820038118002110910108000010005020216422003580000102003920039200392003920039