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

FCMGT (scalar, S)

Test 1: uops

Code:

  fcmgt s0, s0, s1
  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)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
100420371515611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
10042037153611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
10042037160611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371515611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
10042037150611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371548611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371515611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
10042037150611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371524611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
100420371551611687251000100010002646802018203720371572318951000100020002037203711100110000073116111787100020382038203820382038

Test 2: Latency 1->2

Code:

  fcmgt s0, s0, s1
  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)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)5e60696d6emap 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)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204200371503961196872510100100100001001000050028476801120018200372003718422318745101002001000020020000200372003711102011009910010010000100000071011611197910100001002003820085200382003820038
1020420037150061196872510100100100001001000050028476800020018200372003718422318745101002001000020020000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
1020420037150061196872510100100100001001000050028476800020018200372003718422318745101002001000020020000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
1020420037150061196872510100100100001001000050028476800020018200372003718422318745101002001000020020000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
1020420037150961196872510100100100001001000050028476800020018200372003718422318745101002001000020020000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
1020420037150061196872510100100100001001000050028476800020018200372003718422318818101002001000020020000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
10204200371500536196872510100100100001001000050028476800120018200372003718422318745101002001000020020000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
1020420037150961196872510100100100001001000050028476800020018200372003718422318745101002001000020020000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
1020420037150661196872510100100100001001000050028476800020018200372003718422318745101002001000020020000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
1020420037150061196872510100100100001001000050028476800020018200372003718422318745101002001000020020000200372003711102011009910010010000100100071011611197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03091e3f4e51schedule 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)9fl1d tlb miss (a1)l1d cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
100242003715000611968725100101010000101000050284768020018200372003718444318767100102010000202000020037200371110021109101010000100200640216221978510000102003820038200382003820038
1002420037150009431968725100101010000101000050284768020018200372003718444318767100102010000202000020037200371110021109101010000100000640216221978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476802001820037200371844431876710010201000020200002003720037111002110910101000010000126640216221978510000102003820038200382003820038
100242003715000611968725100101010000101000050284768020018200372003718444318767100102010000202000020037200371110021109101010000100003640216221978510000102003820038200382003820038
100242003715000611968725100101010000101000050284768020018200372003718444318767100102010000202000020037200371110021109101010000100000640216221978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476802001820037200371844431876710010201000020200002003720037111002110910101000010020168640216221978510000102003820038200382003820038
1002420037150006119687251001010100001010000502847680200182003720037184443187671001020100002020000200372003711100211091010100001000099640216221978510000102003820038200382003820038
100242003715001326119687251001010100001010000722847680200182003720037184443187671001020100002020000200372003711100211091010100001000075640216221978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476802001820037200371844431876710010201000020200002003720037111002110910101000010000153640216221978510000102003820038200382003820038
100242003715000611968725100101010000101000050284768020018200372003718444318767100102010000202000020084200371110021109101010000100203640216221978510000102003820038200382003820038

Test 3: Latency 1->3

Code:

  fcmgt s0, s1, s0
  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? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020420037150611968725101001001000010010000500284768012001820037200371842203187451010020010000200200002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
10204200371506119687251010010010000100100005002847680020018200372003718422031874510100200100002002000020037200371110201100991001001000010001571011611197910100001002003820038200382003820038
1020420037150611968725101001001000010010000500284768002001820037200371842203187451010020010000200200002003720037111020110099100100100001001371011611197910100001002003820038200382003820038
1020420037150611968725101001001000010010000500284768002001820037200371842203187451010020010000200200002003720037111020110099100100100001005071023711197910100001002003820038200382003820038
1020420037150611968725101001001000010010000500284768002001820037200371842203187451010020010000200200002003720037111020110099100100100001001071011611197910100001002003820038200382003820038
1020420037150611968725101001001000010010000500284768002001820037200371842203187451010020010000200200002003720037111020110099100100100001003071011611197910100001002003820038200382003820038
1020420037150611968725101001001000010010000500284768002001820037200371842203187451010020010000200200002003720037111020110099100100100001001071011611197910100001002003820038200382003820038
1020420037150611968725101001001000010010000500284768002001820037200371842203187451010020010000200200002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
10204200371506119687251010010010000116100005002847680020018200372003718422031874510100200100002002000020037200371110201100991001001000010009671011611197910100001002003820038200382003820038
1020420037150611968725101001001000010010000500284768002001820037200371842203187451010020010000200200002003720037111020110099100100100001000671011611197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03l2 tlb miss data (0b)191e3f4e51schedule 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? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
100242003715000061196872510010101000010100005028476801200180200372003718444318767100102010000202000020037200371110021109101010000105406402162219785010000102003820038200382003820038
10024200371500006119687251001010100001010000502847680120018020037200371844431876710010201000020200002003720037111002110910101000010136402162219785010000102003820038200382003820038
10024200371500006119687251001010100001010000502847680120018020037200371844431876710010201000020200002003720037111002110910101000010166402162219785010000102003820038200382003820038
10024200371500006119687251001010100001010000502847680120018020037200371844431876710010201000020200002003720037111002110910101000010006402162219785010000102003820038200382003820038
1002420037150000611968725100101010000101000050284768012001802003720037184443187671001020100002020000200372003711100211091010100001045876402162219785010000102008520038200382003820038
10024200371500006119687251001010100001010000502847680120018020037200371844431876710010201000020200002003720037111002110910101000010106402162219785010000102003820038200382003820038
10024200371500006119687251001010100001010000502847680120018020037200371844431876710010201000020200002003720037111002110910101000010006402162219785010000102003820038200382003820038
100242003715000061196872510010101000010100005028476801200180200372003718444318767100102010000202000020037200371110021109101010000101006402162219785010000102003820038200382003820038
10024200371500006119687251001010100001010000502847680120018020037200371844431876710010201000020200002003720037111002110910101000010106402162219785010000102003820038200382003820038
100242003715000061196872510010101000010100005028476801200180200372003718444318767100102010000202000020037200371110021109101010000104806402162219785010000102003820038200382003820038

Test 4: throughput

Count: 8

Code:

  fcmgt s0, s8, s9
  fcmgt s1, s8, s9
  fcmgt s2, s8, s9
  fcmgt s3, s8, s9
  fcmgt s4, s8, s9
  fcmgt s5, s8, s9
  fcmgt s6, s8, s9
  fcmgt s7, s8, s9
  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)030918191e3f51schedule 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)acc2cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042006015000004025801001008000011180000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001001300511021611200350800001002003920039200392003920039
802042003815000004025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000000511011611200350800001002003920039200392003920039
802042003815000004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001001000511011611200350800001002003920039200392003920039
80204200381500000402580100100800001008000050064000012001920038200389973399968010020080000200160000200382003811802011009910010080000100049820511011611200350800001002003920039200392003920039
802042003815000004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001001000511011611200350800001002003920039200392003920039
802042003815000004025801001008000010080000500640000120019200852003899733999680100200800002001600002003820038118020110099100100800001004812300511011611200350800001002003920039200392003920039
802042003815000004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000000511011611200350800001002003920039200392003920039
802042003815000004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000000511011611200350800001002003920039200392003920039
802042003815000004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001001000511011611200350800001002003920039200392003920039
802042003815000004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000001511011611200350800001002003920039200392003920039

1000 unrolls and 10 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)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
800242004715039258001010800001080000506400001200190200382003899963100188001020800002016000020038200381180021109101080000100050201116222003580000102003920039200392003920039
800242003815039258001010800001080000506400001200190200382003899963100188001020800002016000020038200381180021109101080000103165020616222003580000102003920039200392003920039
80024200381503925801971080000108000050640000120019020038200389996310018800102080000201600002003820038118002110910108000010235020216632003580000102003920039200392003920039
80024200381503925800101080000108000050640000120019020038200389996310018800102080000201600002003820038118002110910108000010005020616622003580000102003920039200392003920039
80024200381503925800101080000108000050640000120019020038200389996310018800102080000201600002003820038118002110910108000010005020216222003580000102003920039200392003920039
80024200381503925800101080000108000050640000120019020038200389996310018800102080000201600002003820038118002110910108000010005020216262003580000102003920039200392003920039
80024200381503925800101080000108000050640000120019020038200389996310018800102080000201600002003820038118002110910108000010005020616622003580000102003920039200392003920039
80024200381503925800101080000108000050640000120019020038200389996310018800102080000201600002003820038118002110910108000010005020216222003580000102003920039200392003920039
80024200381503925800101080000108000050640000120019020038200389996310018800102080000201600002003820038118002110910108000010005020216222003580000102003920039200392003920039
80024200381503925800101080000108000050640000120019020038200389996310018800102080000201600002003820038118002110910108000010005020216262003580000102003920039200392003920039