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, 4H)

Test 1: uops

Code:

  fcmeq 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)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)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
10042037165161168625100010001000264521120182037203715713189510001000100020372037111001100073116111786100020382038203820382038
1004203715061168625100010001000264521020182037203715713189510001000100020372037111001100073116111786100020382038203820382038
1004203716061168625100010001000264521020182037203715713189510001000100020372037111001100073116111786100020382038203820382038
100420371511161168625100010001000264521120182037203715713189510001000100020372037111001100073116111786100020382038203820382038
1004203716061168625100010001000264521020182037203715713189510001000100020372037111001100073116111786100020382038203820382038
10042037159961168625100010001000264521020182037203715713189510001000100020372037111001100073116111786100020382038203820382038
1004203715061168625100010001000264521120182037203715713189510001000100020372037111001100073116111786100020382038203820382038
1004203715061168625100010001000264521020182037203715713189510001000100020372037111001100073116111786100020382038203820382038
1004203716061168625100010001000264521120182037203715713189510001000100020372037111001100073116111786100020382038203820382038
1004203715061168625100010001000264521020182037203715713189510001000100020372037111001100073116111786100020382038203820382038

Test 2: Latency 1->2

Code:

  fcmeq 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)03mmu table walk data (08)l2 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)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 tlb access (a0)l1d tlb miss (a1)ld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)a9acc2branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd0d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715000001500611968625101001001000010010000500284752120018200372003718428231874110100200100082001000820037200371110201100991001001000010000000002111718001600198010100001002003820038200382003820038
1020420037150000000061196862510100100100001001000050028475212001820037200371842871874010100200100082001000820037200371110201100991001001000010000000000111718001600198000100001002003820038200382003820038
1020420037150000000061196862510100100100001001000050028475212001820037200371842871874010100200100082001000820037200371110201100991001001000010000000000111717001600198000100001002003820038200382003820038
1020420037150000000061196862510100100100001001000050028475212001820037200371842861874010100200100082001000820037200371110201100991001001000010000000000111718001600198000100001002003820038200382003820038
1020420037150000000061196862510100100100001001000050028475212001820037200371842131874510100200100002001000020037200371110201100991001001000010000000000000710011611197910100001002003820038200382003820038
1020420037150000000061196862510100100100001001000050028475212001820228200371842131874510100200100002001000020037200371110201100991001001000010000000000000710011611197910100001002003820038200382003820038
1020420037150000000061196862510100100100001001000050028475212001820037200371842131874510100200100002001000020037200371110201100991001001000010000000000000710011611197910100001002003820038200382003820038
1020420037150000000061196862510100100100001001000050028475212001820037200371842131874510100200100002001000020037200371110201100991001001000010000000000000710011611197910100001002003820038200382003820038
1020420037150000000061196862510100100100001001000050028475212001820037200371842131874510100200100002001000020037200371110201100991001001000010000000000000710011611197910100001002003820038200382003820038
1020420037150000000061196862510100100100001001000050028475212001820037200371842131874510100200100002001000020037200371110201100991001001000010000000000000710011611197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03l2 tlb miss data (0b)181e1f3f4e51schedule 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)a9acbranch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
100242003715000006119686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100000006402162219786010000102003820038200382003820038
100242003715000006119686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100000006402162219786010000102003820038200382003820038
1002420037150000034619686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100000006402162219786110000102003820038200382003820038
100242003716000006119686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100000006402162219786010000102003820038200382003820038
100242003715000006119686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100000006402162219786010000102003820038200382003820038
100242003715000006119686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100000199506402162219786010000102003820038200382003820038
10024200371510012886119686251001010100001010000502847521120018200372003718443318767101632010000201000020037200371110021109101010000100010906402162219786210000102003820038200382003820038
1002420037149009071119686251001010100121010000502848785120018200372003718443318785100102010000201000020037200371110021109101010000100410306402162219786010000102008520038200382003820038
1002420037150011206119686251001010100001110000502847521120018200372003718443318767101662010000201000020037200371110021109101010000100010006402162219786210000102003820038200382003820038
1002420037150103006119686251003710100121010000502847521120018200372003718443318767100102010000201000020084200371110021109101010000100000006402162219786010000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  fcmeq v0.4h, v8.4h, #0
  fcmeq v1.4h, v8.4h, #0
  fcmeq v2.4h, v8.4h, #0
  fcmeq v3.4h, v8.4h, #0
  fcmeq v4.4h, v8.4h, #0
  fcmeq v5.4h, v8.4h, #0
  fcmeq v6.4h, v8.4h, #0
  fcmeq 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)03l1i tlb fill (04)mmu table walk data (08)09l2 tlb miss data (0b)18191e1f3f51schedule 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)acc2branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200591500000000088425801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010000000111511821622200350800001002003920039200392003920039
8020420038150000000002925801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010000000111511811621200350800001002003920039200392003920039
8020420038150000000005025801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010000000111511831621200350800001002003920039200392003920039
8020420038150000000002925801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010000000111511811612200350800001002003920039200392003920039
8020420038150000000002925801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010000000111511821612200350800001002003920039200392003920039
8020420038150000000602925801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010000000111511821612200350800001002003920039200392003920039
8020420038150000000002925801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010000000111511821621200350800001002003920039200392003920039
80204200381500000000050425801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010000000111511821612200350800001002003920039200392003920039
8020420038150000000002925801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010000100111511811612200350800001002003920039200392003920039
8020420038150000000002925801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010000000111511811621200350800001002003920039200392003920039

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.2505

retire uop (01)cycle (02)03191e3a3f51schedule 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)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)daddfetch restart (de)e0ea? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420039150000392580010108000010800005064000002001902003820038999631001880010208000020800002003820038118002110910108000010000502011601120035080000102003920039200392003920039
8002420038150000392580010108000010800005064000012001902003820038999631001880010208000020800002003820038118002110910108000010000502011601120035080000102003920039200392003920039
8002420038150000392580010108000010800005064000002001902003820038999631001880010208000020800002003820038118002110910108000010000502011601120035080000102003920039200392003920039
8002420038150000392580010108000010800005064000002001902003820038999631001880010208000020800002003820038118002110910108000010400502011601120035080000102003920039200392003920039
80024200381501003925800101080188108009750640000120019020038200381000431004580010208009620800002003820038118002110910108000010000502011601120035080000102003920039200392003920039
8002420038150000392580010108000010800005064000002001902003820038999631001880010208000020800002003820038118002110910108000010000502011601120035080000102003920039200392003920039
8002420038150000392580010108000010800005064000002001902003820038999631001880010208000020800002003820038118002110910108000010000502011601120035080000102003920039200392003920039
8002420038150090392580010108000010800005064000012001902003820038999631001880010208000020800002003820038118002110910108000010000502011601120035080000102003920039200392003920039
8002420038150000392580010108000010800005064000002001902003820038999631001880010208000020800002003820038118002110910108000010000502011601120035080000102003920039200392003920039
8002420038150000392580010108000010800005064000012001902003820038999631001880010208000020800002003820038118002110910108000010000502011601120035080000102003920039200392003920039