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

FCMGE (vector, zero, 8H)

Test 1: uops

Code:

  fcmge v0.8h, v0.8h, #0
  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)031e1f3f4e51schedule 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
1004203715008416862510001000100026452102018203720371571318951000100010002037203711100110000373116111786100020382038203820382038
10042037153908416862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
1004203715006116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
10042037160011016862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
1004203715006116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
10042037154206116862510001000100026452102018203720371571318951000100010002037203711100110000673116111786100020382038203820382038
1004203715006116862510001000100026452112018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
10042037156906116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
10042037152106116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
10042037161506116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038

Test 2: Latency 1->2

Code:

  fcmge v0.8h, v0.8h, #0
  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)03191e1f3f4e51schedule 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)9fst unit uop (a7)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204200371500006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100010007101161119857100001002003820038200382003820038
10204200371510006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
10204200371500006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100000307101161119791100001002003820038200382003820038
10204200371500006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200852003711102011009910010010000100000007101161119791100001002003820038200382003820038
10204200371500006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100025012307101161119791100001002003820038200382003820038
10204200371500006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
102042003715001206119686251010010010000100100005002847521120018200372003718431318745101002001000020010000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
102042003715000050019686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
102042003715001206119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
10204200371500006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100000008011161119791100001002003820038200382003820038

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 tlb access (a0)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024200371500611968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010000640216221978610000102003820038200382003820038
100242003715006119686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100360640216221978610000102003820038200382003820038
10024200371500611968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010090640216221978610000102003820038200382003820038
100242003715024611968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010610640216221978610000102003820038200382003820038
10024200371500611968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010000640216221978610000102003820038200382003820038
10024200371500611968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010000640216221978610000102003820038200382003820038
10024200371500611968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010000640216221978610000102003820038200382003820038
10024200371500611968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010000640216221978610000102003820038200382003820038
10024200371500611968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010000640216221978610000102003820038200382003820038
10024200371500611968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010000640216221978610000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  fcmge v0.8h, v8.8h, #0
  fcmge v1.8h, v8.8h, #0
  fcmge v2.8h, v8.8h, #0
  fcmge v3.8h, v8.8h, #0
  fcmge v4.8h, v8.8h, #0
  fcmge v5.8h, v8.8h, #0
  fcmge v6.8h, v8.8h, #0
  fcmge v7.8h, v8.8h, #0
  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)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)acc2branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420049150029258010810080008100800205006401320200192003820038997706998980120200800322008003220038200381180201100991001008000010000011151180160020035800001002003920039200392003920039
8020420038150029258010810080008100800205006401320200192003820038997706998980120200800322008003220038200381180201100991001008000010000011151180160020035800001002003920039200392003920039
8020420038150029258010810080008100800205006401320200192003820038997706998980120200800322008003220038200381180201100991001008000010000011151180160020035800001002003920039200392003920039
8020420038150029258010810080008100800205006401321200192003820038997706998980120200800322008003220038200381180201100991001008000010000011151180160020035800001002003920039200392003920039
8020420038150029258010810080008100800205006401321200192003820038997706998980120200800322008003220038200381180201100991001008000010006011151180160020035800001002003920039200392003920039
8020420038150029258010810080008100800205006401321200192003820038997706998980120200800322008003220038200381180201100991001008000010010011151180160020035800001002003920039200392003920039
8020420038150029258010810080008100800205006401321200192003820038997706998980120200800322008003220038200381180201100991001008000010000011151180160020035800001002003920039200392003920039
8020420038150029258010810080008100800205006401321200192003820038997706998980120200800322008003220038200381180201100991001008000010000011151180160020035800001002003920039200392003920039
8020420038150029258010810080008100800205006401320200192003820038997706998980120200800322008003220038200381180201100991001008000010000011151180160020035800001002003920039200392003920039
8020420038150029258010810080008100800205006401320200192003820038997706998980120200800322008003220038200381180201100991001008000010000011151180160020035800001002003920039200392003920039

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)mmu table walk data (08)l2 tlb miss data (0b)18191e3f51schedule 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)9fl1d tlb access (a0)l1d cache writeback (a8)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200391500000003925800101080000108000050640000012001920038200389996310018800102080000208000020038200381180021109101080000100000502013168102003580000102003920039200392003920039
800242003815000000039258001010800001080000506400000120019200382003899963100188001020800002080000200382003811800211091010800001000005020101612112003580000102003920039200392003920039
80024200381500000003925800101080000108000050640000112001920038200389996310018800102080000208000020038200381180021109101080000100000502081612122003580000102003920039200392003920039
8002420038150000000392580010108000010800005064000001200192003820038999631001880010208000020800002003820038118002110910108000010000050207168102003580000102003920039200392003920039
8002420038150000000392580010108000010800005064000001200192003820038999631001880010208000020800002003820038118002110910108000010010005020101610102003580000102003920039200392003920039
800242003815000000039258001010800001080000506400000120019200382003899963100188001020800002080000200382003811800211091010800001000005020121610102003580000102003920039200392003920039
800242003815000000039258001010800001080000506400000120019200382003899963100188001020800002080000200382003811800211091010800001000005020101610112003580000102003920039200392003920039
80024200381500000007042580010108000010800005064000001200192003820038999631001880010208000020800002003820038118002110910108000010000050208161072003580000102003920039200392003920039
80024200381500000003925800101080000108000050640000012001920038200389996310018800102080000208000020038200381180021109101080000100000502071610102003580000102003920039200392003920039
800242003815000000039258001010800001080000506400000120019200382003899963100188001020800002080000200382003811800211091010800001000005020121610102003580000102003920039200392003920039