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

FCMEQ (vector, zero, 2S)

Test 1: uops

Code:

  fcmeq v0.2s, v0.2s, #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)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)acc3cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100420371506116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
1004203715216116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
1004203715156116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
1004203715156116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
1004203715126116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
100420371536116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
100420371506116862510001000100026452112018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
100420371506116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
100420371506116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
100420371506116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038

Test 2: Latency 1->2

Code:

  fcmeq v0.2s, v0.2s, #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)03mmu table walk data (08)09l2 tlb miss data (0b)18191e1f3a3f4e51schedule 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)a9acc2branch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204200371500000000061196862510100100100001001000050028475210200182003720037184213187451010020010000200100002003720037111020110099100100100001000000000071021622197910100001002003820038200382003820038
1020420037150000000176061196862510100100100001001000050028475210200182003720037184213187451010020010000200100002003720037111020110099100100100001000000000071021622197910100001002003820038200382003820038
10204200371500000000061196862510100100100001001000050028475210200182003720037184213187451010020010000200100002003720037111020110099100100100001000000000071021622197910100001002003820038200382003820038
10204200371500000000061196862510100100100001001000050028475210200182003720037184213187451010020010000204100002003720037111020110099100100100001000000000071021622197910100001002003820038200382003820038
10204200371500000000161196862510100100100001001000050028475210200182003720037184213187451010020010000200100002003720037111020110099100100100001000000000071021622197910100001002003820038200382003820038
102042003715000000000840196862510100100100001001000050028475210200182003720037184213187451010020010000200100002003720037111020110099100100100001000000000071021622197910100001002003820038200382003820038
102042003715000000000105196862510100100100001001000050028475210200182003720037184213187451010020010000200100002003720037111020110099100100100001000000000071021622197910100001002003820038200382003820038
10204200371500000000082196862510100100100001001000050028475210200182003720037184217187451010020010000200100002003720037111020110099100100100001000000000071021622197910100001002003820038200382003820038
102042003715000000750061196862510100100100001001000050028475210200182003720037184213187451010020010000200100002003720037111020110099100100100001000000000071021622197910100001002003820038200382003820038
10204200371500000000061196862510100100100001001000050028475210200182003720037184213187451010020010000200100002003720037111020110099100100100001000000000071021622197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03191e3f4e51schedule 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)ld unit uop (a6)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
100242003715005710319686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100000640316331978610000102003820038200382003820038
10024200371500186119686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000104313913640316331978610000102003820038200382003820038
10024200371501126119686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100000640316331978610000102003820038200382003820038
10024200371500053619686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100000640316331978610000102003820038200382003820038
1002420037150006119686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100000640316331978610000102003820038200382003820038
100242003715001561196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000250640316331978610000102003820038200382003820038
10024200371501156119686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100000640316331978610000102003820038200382003820038
1002420037150006119686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100000640316331978610000102003820038200382003820038
10024200371500186119686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100000640316331978610000102003820038200382003820038
1002420037150066119686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100000640316331978610000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  fcmeq v0.2s, v8.2s, #0
  fcmeq v1.2s, v8.2s, #0
  fcmeq v2.2s, v8.2s, #0
  fcmeq v3.2s, v8.2s, #0
  fcmeq v4.2s, v8.2s, #0
  fcmeq v5.2s, v8.2s, #0
  fcmeq v6.2s, v8.2s, #0
  fcmeq v7.2s, v8.2s, #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 instruction (07)l2 tlb miss instruction (0a)1e1f3f51schedule 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)acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420049150114502925801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010000011151181161120035800001002003920039200392003920039
80204200381501120102925801081008000810080020500640132120019200382003899776998980120200800322008003220038200381180201100991001008000010000011151181162120035800001002003920039200392003920039
802042003815011002925801081008000810080112500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010000011151181161120035800001002003920039200392003920039
802042003815011005225801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010000011151181161120035800001002003920039200392003920039
802042003815011002925801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010000011151181161120035800001002003920039200392003920039
802042003815011002925801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010000011151181161120035800001002003920039200392003920039
8020420038150113302925801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010000011151181161120035800001002003920039200392003920039
80204200381501128502925801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010000011151181161120035800001002003920039200392003920039
802042003815011902925801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010002011151181161120035800001002003920039200392003920039
8020420038150110069425801961008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010000011151181161120035800001002003920039200392003920039

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)acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cfd5map dispatch bubble (d6)daddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242005115000213925800101080000108000050640000020019200382003899963100188001020800002080000200382003811800211091010800001000005020916022112003580000102003920039200392003920039
80024200381500003925800101080000108000050640000020019200382003899963100188001020800002080000200382003811800211091010800001000005020111609222003580000102003920039200392003920039
800242003815000039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010000050201016022102003580000102003920039200392003920039
800242003815000039258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010000050201116022102003580000102003920039200392003920039
800242003815000039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010000050202216022222003580000102003920039200392003920039
800242003815000039258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010000050202216011222003580000102003920039200392003920039
800242003815000012325800101080000108000050640000020019200382003899963100188001020800002080000200382003811800211091010800001000005020916022112003580000102003920039200392003920039
80024200381500003925800101080000108000050640000020019200382003899963100188001020800002080000200382003811800211091010800001000005020111609222003580000102003920039200392003920039
800242003815000039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010000050201116011222003580000102003920039200392003920039
800242003815000039258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010000050202216011222007480000102003920039200392003920039