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

FCMLE (vector, zero, 4S)

Test 1: uops

Code:

  fcmle v0.4s, v0.4s, #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)l1d cache writeback (a8)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
10042037150611686251000100010002645210201820372037157131895100010001000203720371110011000073216111786100020382038203820382038
10042037160611686251000100010002645211201820372037157131895100010001000203720371110011000073116111786100020382038203820382038
10042037150611686251000100010002645210201820372037157131895100010001000203720371110011000073116111786100020382038203820382038
10042037150611686251000100010002645210201820372037157131895100010001000203720371110011000073116111786100020382038203820382038
100420371601031686251000100010002645211201820372037157131895100010001000203720371110011000073116111786100020382038203820382038
10042037150611686251000100010002645211201820372037157131895100010001000203720371110011000073116111786100020382038203820382038
1004203715162611686251000100010002645211201820372037157131895100010001000203720371110011000073116111786100020382038203820382038
10042037150611686251000100010002645211201820372037157131895100010001000203720371110011000073116111786100020382038203820382038
10042037150611686251000100010002645211201820372037157131895100010001000203720371110011000073116111786100020382038203820382038
10042037160611686251000100010002645210201820372037157131895100010001000203720371110011000073116111786100020382038203820382038

Test 2: Latency 1->2

Code:

  fcmle v0.4s, v0.4s, #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)091e3f4e51schedule 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020420037150110251196862510100100100001001000060828475210200182003720037184213187451010020610000200100002003720037111020110099100100100001002371011611197910100001002003820038202312003820038
102042003715000285103196862510100130100001001000050028475210200182003720037184213187451010020010000200100002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
102042003715000186103196862510100100100001001000050028475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
102042003715000061196862510100100100001001000050028475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000071021611197910100001002003820038200382003820038
102042003715000061196862510100100100001001015259228475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
10204200371500023761196862510100100100001001000050028475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
102042003715000661196862510100100100001001000050028475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
1020420037150002761196862510100100100001001000050028475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
1020420037150002161196862510100100100001001000050028475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000071011611197910100001002008720038200382003820038
102042003715000061196862510100100100001001000050028475211200182003720037184217187451010020010000200100002003720037111020110099100100100001000071011611197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)0318191e3a3f4e51schedule 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002420037150004506119686251001010100001010000502847521200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
100242003715000006119686251001010100001010000502847521200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
100242003715000006119686251001010100001010000502847521200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
1002420037150002706119686251001010100001010000502847521200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
100242003715000006119686251001010100001010000502847521200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
100242003715000006119686251001010100001010000502847521200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
1002420037150002106119686251001010100001010000502847521200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
1002420037150008406119686251001010100001010000502847521200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
100242003715000006119686251001010100001010000502847521200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
1002420037150000072619686251001010100001010000502847521200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  fcmle v0.4s, v8.4s, #0
  fcmle v1.4s, v8.4s, #0
  fcmle v2.4s, v8.4s, #0
  fcmle v3.4s, v8.4s, #0
  fcmle v4.4s, v8.4s, #0
  fcmle v5.4s, v8.4s, #0
  fcmle v6.4s, v8.4s, #0
  fcmle v7.4s, v8.4s, #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)0318191e3f51schedule 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)9fa9branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042005915000122925801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100011151180160020035800001002003920039200392003920086
802042003815000635225802121008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100011151180160020035800001002003920039200392003920039
80204200381501162925801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100011151180160020035800001002003920039200392003920039
80204200381500002925801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100011151180161120035800001002003920039200392003920039
80204200381500002925801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100011151180160020035800001002003920039200392003920039
802042003815000242925801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100011151180170020035800001002003920039200392003920039
80204200381500020112425801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100011151180160020035800001002003920039200392003920039
80204200381500032925801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100011151180160020035800001002003920039200392003920039
802042003815000122925801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100011151180160020035800001002003920039200392003920039
80204200381500002925801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100011151180160020035800001002003920039200392003920039

1000 unrolls and 10 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)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)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420124150333602580010108000010800005064000012001920038200389996310018801092080000208000020038200381180021109101080000100005020221611142003580000102003920039200392003920039
8002420038150153925800101080000108000050640000120019200382003899963100188001020800002080000200382003811800211091010800001000050207165102003580000102003920039200392003920039
800242003815003925800101080000108000050640000120019200382003899963100188001020800002080000200382003811800211091010800001000050209169112003580000102003920039200392003920039
800242003815006025800101080000108000050640000120019200382003899963100188001020800002080000200382003811800211091010800001000050201016962003580000102003920039200392003920039
8002420038150039258001010800001080000506400001200192003820038999631004680010208000020800002003820038118002110910108000010000502010161072003580000102003920039200392003920039
8002420038150039258001010800001080000506400001200192003820038999631001880010208000020800002003820038118002110910108000010000502010167102003580000102003920039200392003920039
800242003815003925800101080000108000050640000120019200382003899963100188001020800002080000200382003811800211091010800001000050209161072003580000102003920039200392003920039
800242003815002292580010108000010800005064000002001920038200389996310018800102080000208000020038200381180021109101080000100005020516772003580000102003920039200392003920039
800242003815015392580010108000010800005064000002001920038200389996310018800102080000208000020038200381180021109101080000100005020716582003580000102003920039200392003920039
80024200381500392580010108000010800005064000002001920038200389996310018800102080000208000020038200381180021109101080000100005020816872003580000102003920039200392003920039