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, 4H)

Test 1: uops

Code:

  fcmge v0.4h, v0.4h, #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)03mmu table walk data (08)191e3f4e51schedule 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
100420371500010516862510001000100026452102018203720371571318951000100010002037203711100110000073216221786100020382038203820382038
100420371600061168625100010001000264521120182037203715713189510001000100020372084111001100002473216221786100020382038203820382038
100420371501186116862510001000100026452112018203720371571318951000100010002037203711100110000073216221786100020382038203820382038
10042037150006116862510001000100026452112018203720371571318951000100010002037203711100110000073216221786100020382038203820382038
10042037150006116862510001000100026452112018203720371571318951000100010002037203711100110000073216221852100020382038203820382038
100420371500156116862510001000100026452112018203720371571318951000100010002037203711100110000073216221786100020382038203820382038
10042037150006116862510001000100026452112018203720371571318951000100010002037203711100110000373216221786100020382038203820382038
10042037160006116862510001000100026452112018203720371571318951000100010002037203711100110000073216221786100020382038203820382038
100420371500156116862510001000100026452112018203720371571318951000100010002037203711100110000073216221786100020382038203820382038
10042037150096116862510001000100026452102018203720371571318951000100010002037203711100110000073216221786100020382038203820382038

Test 2: Latency 1->2

Code:

  fcmge v0.4h, v0.4h, #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)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 tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)a9accdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715000300611968625101001001000010010000500284752112001820037200371842131874510100200100002001000020037200371110201100991001001000010000000007102161119791100001002003820038200382003820038
10204200371500000611968625101001001000010010000500284752102001820037200371842131874510100200100002001000020037200371110201100991001001000010000000007101161119791100001002003820038200382003820038
10204200371500000611968625101001001000010010000500284752112001820037200371842131874510100200100002001000020037200371110201100991001001000010000000007101161119791100001002003820038200382003820038
10204200371500000611968625101001001000010010000500284752112001820037200371842131874510100200100002001000020037200371110201100991001001000010000000007101161119791100001002003820038200382003820038
10204200371500090611968625101001001000010010000500284752102001820037200371842131874510100200100002001000020037200371110201100991001001000010000000007101161119791100001002003820038200382003820038
10204200371500000611968625101001001000010010000500284752112001820037200371842131874510100200100002001000020037200371110201100991001001000010000000007101161119791100001002003820038200382003820038
10204200371500000611968625101001001000010010000500284752102001820037200371842131874510100200100002001000020037200371110201100991001001000010000000007101161119791100001002003820038200382003820038
10204200371500000611968625101001001000010010000500284752112001820037200371842131874510100200100002001000020037200371110201100991001001000010000000007101161119791100001002003820038200382003820038
10204200371500000611968625101001001000010010000500284752102001820037200371842131874510100200100002001000020037200371110201100991001001000010000000007101161119791100001002003820038200382003820038
10204200371500000611968625101001001000010010000500284752102001820037200371842131874510100200100002001000020037200371110201100991001001000010000000007101161119791100001002003820038200382003820038

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
1002420037150061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640616661978610000102003820038200382003820038
1002420037150061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640616651978610000102003820038200382003820038
1002420037150061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640616461978610000102003820038200382003820038
1002420037150061196862510010121001210100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640516551978610000102003820038200382003820038
1002420037150061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640616561978610000102003820038200382003820038
1002420037150061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640516651978610000102003820038200382003820038
1002420037150061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640516641978610000102003820038200382003820038
1002420037150061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640616561978610000102003820038200382003820038
10024200371500611968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010015640516541978610000102003820038200382003820038
100242003715038761196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640516561978610000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  fcmge v0.4h, v8.4h, #0
  fcmge v1.4h, v8.4h, #0
  fcmge v2.4h, v8.4h, #0
  fcmge v3.4h, v8.4h, #0
  fcmge v4.4h, v8.4h, #0
  fcmge v5.4h, v8.4h, #0
  fcmge v6.4h, v8.4h, #0
  fcmge v7.4h, v8.4h, #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)03mmu table walk data (08)191e3a3f5051schedule 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)acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfmap dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042006115000002920022258010810080008100800205006401320200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118160020035800001002003920039200392003920039
80204200381500000290258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118160120035800001002003920039200392003920039
80204200381500000290258010810080008100800205006401320200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118160020035800001002003920039200392003920039
80204200381500000290258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118160020035800001002003920039200392003920039
80204200381491000290258010810080008100800205006409201200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118160020035800001002003920039200392003920039
80204200381500000290258010810080008100800205006401320200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118160020035800001002003920039200392003920039
80204200381500000290258010810080008100800205006401320200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118160020035800001002003920039200392003920039
80204200381500000290258010810080008100800205006401320200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118160020035800001002003920039200392003920039
80204200381500000290258010810080008100800205006401320200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118160020035800001002003920039200392003920039
80204200381500000290258010810080008100800205006401320200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118160020035800001002003920039200392003920039

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)091e3f51schedule 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)accfl1i cache miss demand (d3)d5map dispatch bubble (d6)ddfetch restart (de)e0eb? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420039150020392580010108000010800005064000012001920038200389996310018800102080000208000020038200381180021109101080000103657502003162320035080000102003920039200392003920039
80024200381500003925800101080000108000050640000120019200382003899963100188001020800002080000200382003811800211091010800001000502004162320035080000102003920039200392003920039
80024200381500003925800101080000108000050640000120019200382003899963100188001020800002080000200382003811800211091010800001000502002162220035080000102003920039200392003920039
800242003815000039258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010351502002162220035080000102003920039200392003920039
80024200381500003925800101080000108000050640000120019200382003899963100188001020800002080000200382003811800211091010800001010502002163420035080000102003920039200392003920039
8002420038150001239258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010153502002162220035080000102003920039200392003920039
800242003815000039258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010353502002162320035080000102003920039200392003920039
800242003815000039258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010160502002164220035080000102003920039200392003920039
800242003815000039258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010260502002164420035080000102003920039200392003920039
800242003815000039258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010263502003162220035080000102003920088200392003920039