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

CMEQ (zero, 2S)

Test 1: uops

Code:

  cmeq 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)03mmu table walk data (08)09l2 tlb miss data (0b)18191e1f3a3f4e51schedule 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)ld unit uop (a6)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
1004203715000000006116862510001000100026452120182037203715713189510001000100020372037111001100000000073116111786100020382038203820382038
1004203715000003006116862510001000100026452120182037203715713189510001000100020372037111001100000000073116111786100020382038203820382038
1004203715000000006116862510001000100026452120182037203715713189510001000100020372037111001100000000073116111786100020382038203820382038
1004203715000003006116862510001000100026452120182037203715713189510001000100020372037111001100000000073116111786100020382038203820382038
1004203716000000006116862510001000100026452120182037203715713189510001000100020372037111001100000000073116111786100020382038203820382038
1004203715000000006116862510001000100026452120182037203715713189510001000100020372037111001100000000073116111786100020382038203820382038
1004203716000000006116862510001000100026452120182037203715713189510001000100020372037111001100000000073116111786100020382038203820382086
1004203715000000006116862510001000100026452120182037203715713189510001000100020372037111001100000000073116111786100020382038203820382038
1004203715000000006116862510001000100026452120182037203715713189510001000100020372037111001100000000073116111786100020382038203820382038
1004203715000000006116862510001000100026452120182037203715713189510001000100020372037111001100000000073116111786100020382038203820382038

Test 2: Latency 1->2

Code:

  cmeq 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)03l2 tlb miss data (0b)1e1f3a3f4e51schedule 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? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020420037150000061196862510100100100001001000050028475210200182003720037184213187451010020010000200100002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
1020420037150000061196862510100100100001001000050028475210200182003720037184213187451010020010000200100002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
1020420037150000061196862510100100100001001000050028475210200542003720037184213187451010020010000200100002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
1020420037150000061196862510100100100001001000050028475210200182003720037184213187451010020010000200100002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
1020420037150000061196862510100100100001001000050028475210200182003720037184243187451010020010000200100002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
1020420037149000061196862510100100100001001000050028475210200182003720037184213187451010020010000200100002003720037111020110099100100100001000371011611197910100001002003820038200382003820038
1020420037150000061196862510100100100001001000050028475210200182003720037184213187451010020010000200100002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
1020420037150000061196862510100100100001001000050028475210200182003720037184213187451010020010000200100002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
1020420037150000061196862510100100100001001000050028475210200182003720037184213187451010020010000200100002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
1020420037149000061196862510100100100001001000050028475210200182003720037184213187451010020010000200100002003720037111020110099100100100001000071011611197910100001002003820038200382003820038

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)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024200371500611968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010000640216221978610000102003820038200382003820038
10024200371500611968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010000640216221978610000102003820038200382003820038
10024200371500611968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010000640216221978610000102003820038200382003820038
10024200371500611968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010002640216221978610000102003820038200382003820038
10024200371500611968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010000640216221978610000102003820038200382003820038
10024200371500611968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010000640216221978610000102003820038200382003820038
1002420037150012221968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010060640216221978610000102003820038200382003820038
100242003715006119686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100120640216221978610000102003820038200382003820038
10024200371500611968625100101010000101000050284752112001820179200371844331876710010201000020100002003720037111002110910101000010000640216221978610000102003820038200382003820038
10024200371500611968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010030640216231978610000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  cmeq v0.2s, v8.2s, #0
  cmeq v1.2s, v8.2s, #0
  cmeq v2.2s, v8.2s, #0
  cmeq v3.2s, v8.2s, #0
  cmeq v4.2s, v8.2s, #0
  cmeq v5.2s, v8.2s, #0
  cmeq v6.2s, v8.2s, #0
  cmeq 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)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)acbranch 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
802042006715002925801081008000810080020500640132120019200382003899776998980120200800322008003220038200381180201100991001008000010000111511821622200350800001002003920039200392003920039
802042003815002925801081008000810080020500640132120019200382003899776998980120200800322008003220038200381180201100991001008000010013111511811612200350800001002003920039200392003920039
8020420038150029258010810080008100800205006401321200192003820038997761002480120200800322008003220038200381180201100991001008000010000111511821622200350800001002003920039200392003920039
802042003815002925801081008000810080020500640132120019200382003899776998980120200800322008003220038200381180201100991001008000010020111511821621200350800001002003920039200392003920039
80204200381500292580108100800081028002050064013202001920038200389977119989801202008003220080032200382003811802011009910010080000100460111511821621200350800001002003920039200392003920039
802042003815002925801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010000111511821622200350800001002003920039200392003920039
802042003815002925801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010020111511811621200350800001002003920039200392003920039
802042008815002925801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010020111511811612200350800001002003920039200392003920039
802042003815002925801081008000810080020500640132120019200382003899776998980120200800322008003220038200381180201100991001008000010000111511821621200350800001002003920039200392003920039
8020420038150029828010810080008100800205006401320200192003820038997769989801202008003220080032200382003811802011009910010080000100383111511821621200350800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)031e3a3f51schedule 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)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)9fld unit uop (a6)l1d cache writeback (a8)a9acc2cfd0d5map dispatch bubble (d6)ddfetch restart (de)e0eaeb? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200501500021125800101080000108000050640000002001920038200389996031001880010208000020800002003820038118002110910108000010000005037031633200350080000102003920039200392003920039
8002420038150003925800101080000108000050640000012001920038200389996031001880010208000020800002003820038118002110910108000010000005020031632200350080000102003920039200392003920039
80024200381500014425800101080000108000050640000012001920038200389996031001880010208000020800002003820038118002110910108000010000005037031633200350080000102003920039200392003920039
80024200381500016925800101080000108000050640000012001920038200389996731001880010208000020800002003820038118002110910108000010000005020021623200350080000102003920039200392003920039
80024200381501809825800101080000108000050640000002001920038200389996031001880010208000020800002003820038118002110910108000010000005020031633200350080000102003920039200392003920039
8002420038150006025800101080000108000050640000012001920038200389996031001880010208000020800002003820038118002110910108000010000005020031632200350080000102003920039200392003920039
8002420038150003925800101080000108000050640000002001920038200389996031001880010208000020800002003820038118002110910108000010000005020031672200350080000102003920039200392003920039
80024200381500053825800101080000108000050640000012001920038200389996031001880010208000020800002003820038118002110910108000010000005020031643200350080000102003920039200392003920039
8002420038150003925800101080000108000050640000012001920038200389996031001880010208000020800002003820038118002110910108000010000005020021633200350080000102003920039200392003920039
8002420038150003925800101080000108000050640000002001920038200389996031001880010208000020800002003820038118002110910108000010000005020021643200350080000102003920039200392003920039