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

FMIN (scalar, S)

Test 1: uops

Code:

  fmin 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)03mmu table walk instruction (07)l2 tlb miss instruction (0a)3a3f4e51schedule 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 tlb access (a0)l1d tlb miss (a1)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100420371511268168725100010001000264680201820372037157231895100010002000203720371110011000000077316441787100020382038203820382038
100420371511268168725100010001000264680201820372037157231895100010002000203720371110011000000377416441787100020382038203820382038
10042037161126816872510001000100026468020182037203715723189510001000200020372037111001100000075577416441787100020382038203820382038
100420371511268168725100010001000264680201820372037157231895100010002000203720371110011000000077416441787100020382038203820382038
100420371511268168725100010001000264680201820372037157231895100010002000203720371110011000000077416441787100020382038203820382038
100420371511268168725100010001000264680201820372037157231895100010002000203720371110011000000077416441787100020382038203820382038
100420371511268168725100010001000264680201820372037157231895100010002000203720371110011000000077416441787100020382038203820382038
100420371611268168725100010001000264680201820372037157231895100010002000203720371110011000000377316441787100020382038203820382038
100420371511268168725100010001000264680201820372037157231895100010002000203720371110011000000077416441787100020382038203820382038
100420371511268168725100010001000264680201820372037157231895100010002000203720371110011000000077416441787100020382038203820382038

Test 2: Latency 1->2

Code:

  fmin 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)03mmu table walk data (08)3f4e51schedule 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)696b6d6emap 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 mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715009019687251010010010000100100005002847680200180200372003718422318745101002001000020020000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
1020420037150017019687251010010010000100100005002847680200180200372003718422318745101002001016420020000200372003711102011009910010010000100003071011611197910100001002003820038200382003820038
102042003715006119687251010010010000100100005002847680200180200372003718422318745101002001000020020000200372003711102011009910010010000100010071011611197910100001002003820038200382003820038
102042003715006119687251010010010000100100005002847680200180200372003718422318745101002001000020020000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
1020420037150012319687251010010010000100100005002847680200180200372003718422318745101002001000020020000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
1020420037150061196872510100100100001001000050028476802001802003720037184223187451010020010000200200002003720037111020110099100100100001000000710116111979126100001002003820038200382003820038
102042003715009419687251010010010000100100005002847680200180200862003718422318745101002001000020020000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
1020420037149017419687251010010010000100100005002847680200180200372003718422318745101002001000020020000200372003711102011009910010010000100000071011611197912100001002003820038200382003820038
1020420037150010319676431013210010000100100005002847680200180200372003718422318745101002001000020020000200372003711102011009910010010000100000071011621197918100001002003820038200382003820038
1020420037150110319687251010010010000100100005002847680200180200372003718422318745101002001000020020000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03mmu table walk instruction (07)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)60696b6d6emap 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 tlb access (a0)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002420037150000001031968725100101010000101000050284768012001802003720037184440318767100102010000202000020037200371110021109101010000100066402162219785210000102003820038200382003820038
100242003715000000611968725100101010000101000050284768012001802003720037184440318767100122010000202000020037200371110021109101010000100106402164419785010000102003820038200382003820085
100242003715010000821968725100101010000101000050284768012001802003720037184440318767100102010000202000020037200371110021109101010000100006402162219785010000102003820038200382003820038
100242003715000000611968725100101010000101000050284768012001802003720037184440318767100102010000202000020037200371110021109101010000100006402162219785010000102003820038200382003820038
100242003715000000611968725100101010000101000050284768012001802003720037184440318767100122010000202000020037200371110021109101010000100006402162219785010000102003820038200382003820038
1002420037150000001181968725100101010000101000050284768012001802003720037184440318767100102010000202000020037200371110021109101010000100106402162219785010000102003820038200382003820038
1002420037150000005361968725100101010000101000050284768012001802003720037184440318767100102010000202000020037200371110021109101010000100006402162219785210000102003820038200382003820038
100242003715000000821968725100101010000101000050284768012001802003720037184440318767100102010000202000020037200371110021109101010000100106402162219787210000102003820038200382003820038
1002420037150000001241968725100101010000101000050284768012001802003720037184440318767100102010000202000020037200371110021109101010000100006402162219785010000102003820038200382003820038
100242003715000000611968725100101010000101000050284768012001802003720037184440318767100102010000202000020037200371110021109101010000100106402162219785010000102003820038200382003820038

Test 3: Latency 1->3

Code:

  fmin 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)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)9faccfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715002631968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010007101161119791100001002003820038200382003820038
10204200371500611968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010007101161119791100001002003820038200382003820038
102042003715001471968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010007101161119791100001002003820038200382008620038
102042003715004051968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010007101161119791100001002003820038200382003820038
10204200371500611968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010007101161119791100001002003820038200382003820038
10204200371500611968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010007101161119791100001002003820038200382003820038
10204200371500611968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010007101161119791100001002003820038200382003820038
102042003715003871968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010007101161119791100001002003820038200382003820038
102042003715004871968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010007101161119791100001002003820038200382003820038
10204200371500611968725101001001000010010000500284768012001820037200371842231874510100200100002002000020037200371110201100991001001000010007101161119791100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03mmu table walk instruction (07)mmu table walk data (08)l2 tlb miss instruction (0a)l2 tlb miss data (0b)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 access (a0)l1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024200371500000000061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000000006402162219785010000102003820038200382003820038
1002420037150000000393061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000000006402162219785010000102003820038200382003820038
100242003715000000069061196672510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000000006402162219785010000102003820038200382003820038
100242003714900000012061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000000006402162219785010000102003820038200382003820038
10024200371500000000061196872510010101000010100005028476801200182003720037184447187671001020100002020000200372003711100211091010100001000000006402162219785010000102003820038200382003820038
100242003715000000024061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000000006402162219785010000102003820038200382003820038
10024200371500000000061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000000006402162219785010000102003820038200382003820038
1002420037150000000225061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000000006402162219785010000102003820038200382003820038
10024200371500000000061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000000006402162219785010000102003820038200382003820038
10024200371500000000061196872510010121000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000000006402162219785010000102003820038200382003820038

Test 4: throughput

Count: 8

Code:

  fmin s0, s8, s9
  fmin s1, s8, s9
  fmin s2, s8, s9
  fmin s3, s8, s9
  fmin s4, s8, s9
  fmin s5, s8, s9
  fmin s6, s8, s9
  fmin 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)03l2 tlb miss data (0b)1e3f51schedule 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 cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200561500040258010010080000100800005006400002001920038200389973399968010020080000200160000200382003811802011009910010080000100000511031611200350800001002003920039200392003920039
80204200381500040258010010080000100800005006400002001920038200389973399968010020080000200160000200382003811802011009910010080000100000511011611200350800001002003920039200392003920039
80204200381500940258010010080000100800005006400002001920038200389973399968010020080000200160000200382003811802011009910010080000100000511011610200350800001002003920039200392003920039
80204200381500061258010010080000100800005006400002001920038200389973399968010020080000200160000200382003811802011009910010080000100000511011611200350800001002003920039200392003920039
80204200381500040258010010080000100800005006400002001920038200389973399968010020080000200160000200382003811802011009910010080000100000511011611200350800001002003920039200392003920039
802042003815001240258010010080093100800005006400002001920038200389973399968010020080000200160000200382003811802011009910010080000100000511011611200350800001002003920039200392003920039
80204200381500040258010010080000100800005006400002001920038200389973399968010020080000200160000200382003811802011009910010080000100000511011611200350800001002003920039200392003920039
802042003815001240258010010080000100800005006400002001920038200389973399968010020080000200160000200382003811802011009910010080000100000511011611200350800001002003920039200392003920039
80204200381500040258010010080000100800005006400002001920038200389973399968010020080000200160000200382003811802021009910010080000100000511011611200350800001002003920039200392003920039
802042003815002440258010010080000100800005006400002001920038200389973399968010020080000200160000200382003811802011009910010080000100000511011611200350800001002003920039200392003920039

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)1e3f51schedule 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 cache writeback (a8)accfd0d2d5map dispatch bubble (d6)d9dadbddfetch restart (de)e0eaeb? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242004715001239258001010800001080000506400001020019200382003899963100188001020800002016000020038200381180021109101080000100050200021600024200350080000102003920039200392003920039
80024200381500039258001010800001080000506400000020019200382003899963100188001020800002016000020038200381180021109101080000100050200041600042200350080000102003920039200392003920039
80024200381501039258001010800001080000506400001120019200382003899963100188001020800002016000020038200381180021109101080000100050200021600024200350080000102003920039200392003920039
80024200381500039258001010800001080000506400000020019200382003899963100188001020800002016000020038200381180021109101080000100050200041600024200350080000102003920039200392003920039
8002420038155033514258001010800001080000506400000020019200382003899963100188001020800002016000020038200381180021109101080000100050200021600077200350080000102003920039200392003920039
80024200381500039258001010800001080000506400000020019200382003899963100188001020800002016000020038200381180021109101080000100050200041600042200350080000102003920039200392003920039
80024200381500039258001010800001080000506400000020019200382003899963100188001020800002016000020038200381180021109101080000100050200041600042200350080000102003920039200392003920039
80024200381500039258001010800001080000506400000020019200382003899963100188001020800002016000020038200381180021109101080000100050200021600067200350080000102003920039200392003920039
80024200381500039258001010800001080000506400000020019200382003899963100188001020800002016000020038200381180021109101080000100050200041600044200350080000102003920039200392003920039
80024200381500039258001010800001080000506400000020019200382003899963100188001020800002016000020038200381180021109101080000100050200021600043200350080000102003920039200392003920039