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

SADDLP (vector, 4S)

Test 1: uops

Code:

  saddlp v0.4s, v0.8h
  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)031e1f3f4e51schedule 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 cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
1004203715006116862510001000100026452120182037203715713189510001000100020372037111001100000373216221786100020382038203820382038
1004203715006116862510001000100026452120182037203715713189510001000100020372037111001100000073216221786100020382038203820382038
1004203715006116862510001000100026452120182037203715713189510001000100020372037111001100000073216221786100020382038203820382038
1004203715906116862510001000100026452120182037203715713189510001000100020372037111001100000073216221786100020382038203820382038
100420371515606116862510001000100026452120182037203715713189510001000100020372037111001100000073216221786100020382038203820382038
1004203715006116862510001000100026452120182037203715713189510001000100020372037111001100002073216221786100020382038203820382038
1004203715006116862510001000100026452120182037203715713189510001000100020372037111001100000073216221786100020382038203820382038
1004203715006116862510001000100026452120182037203715713189510001000100020372037111001100000073216221786100020382038203820382038
1004203715006116862510001000100026452120182037203715713189510001000100020372037111001100000073216221786100020382038203820382038
1004203715006116862510001000100026452120182037203715713189510001000100020372037111001100000073216221786100020382038203820382038

Test 2: Latency 1->2

Code:

  saddlp v0.4s, v0.8h
  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)03181e1f3f4e51schedule 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)9fl1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715000020819686251010010010000100100005002847521200180200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
10204200371500008219686251010010010000100100005002847521200180200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
102042003715000047619686251010010010000100100005002847521200180200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
10204200371500006119686251010010010000100100005002847521200180200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037150000106619686251010010010000100100005002847521200180200372003718421318745101002001000020010000200372003711102011009910010010000100107101161119791100001002003820038200382003820038
102042003715000097919686251010010010000100100006422847521200180200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
10204200371500006119686251010010010000100100005002847521200180200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
102042003715000018919686251010010010000100100005002847521200180200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
10204200371500006119686251010010010000100100005002847521200180200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
102042003715000014919686251010010010000100100005002847521200180200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)031e1f3f4e51schedule 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)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
100242003715000107196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000006402162219786010000102003820038200382003820038
10024200371500061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001005006402162219786010000102003820038200382003820038
10024200371500061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000006402162219786010000102003820038200382003820038
10024200371500061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000006402162219786010000102003820038200382003820038
10024200371500061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000006402162219786010000102003820038200382003820038
10024200371500061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000006402162219786210000102003820038200382003820038
100242003715000124196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000006402162219786010000102003820038200382003820038
1002420037150001619196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001002006402162219786010000102003820038200382003820038
10024200371500061196862510010101000010100005028475210200182003720037184433187671016320100002010000200372003711100211091010100001000006402162319786010000102003820038200382003820038
10024200371500061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001020006402162219854210000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  saddlp v0.4s, v8.8h
  saddlp v1.4s, v8.8h
  saddlp v2.4s, v8.8h
  saddlp v3.4s, v8.8h
  saddlp v4.4s, v8.8h
  saddlp v5.4s, v8.8h
  saddlp v6.4s, v8.8h
  saddlp v7.4s, v8.8h
  movi v8.16b, 9

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.2506

retire uop (01)cycle (02)03mmu table walk data (08)l2 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)l1d tlb miss (a1)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
8020420057150000000134258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100000000111511811600200350800001002003920039200392003920039
802042003815000000029258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100000000111511801600200350800001002003920039200392003920039
802042003815000000029258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100000000111511801600200350800001002003920115200392011420039
802042003815000000029258010810080008100800205006401320200192003820038997769989801202008003220080032200382003811802011009910010080000100000000111511801600200350800001002003920039200392003920039
802042003815000000029258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100000000111511801601200350800001002003920039200392003920039
802042003815000000029258010810080008100800205006401320200192003820038997769989801202008003220080032200382003811802011009910010080000100000000111511801600200350800001002003920039200392003920039
8020420038150000000446258010810080008100800205006401320200192003820038997769989801202008003220080032200382003811802011009910010080000100000000111511801600200350800001002003920039200392003920039
8020420038150000000292580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000001800111511801600200350800001002003920039200392003920039
802042003815000000029258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100000000111511801601200350800001002003920039200392003920039
802042003815000000029258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100000000111511801600200350800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03l2 tlb miss data (0b)18191e3a3f51schedule 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 tlb access (a0)ld unit uop (a6)l1d cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242003915000000392580010108000010800005064000012001902003820038999631001880010208000020800002003820038118002110910108000010000005020216362003580000102003920039200392003920039
800242003815000000602580010108000010800005064000012001902003820038999631001880010208000020800002003820038118002110910108000010000005020316332003580000102003920039200392003920039
8002420038150000001692580010108000010800005064000012001902003820038999631001880010208000020800002003820038118002110910108000010000005020316342003580000102003920039200392003920039
800242003815000000622580010108000010800005064000012001902003820038999631001880010208000020800002003820038118002110910108000010000005020216232003580000102003920039200392003920039
800242003815001000392580092108000010800005064000012001902003820038999631001880010208000020800002003820038118002110910108000010000005020316352003580000102003920039200392003920039
800242003815000000392580010108000010800005064000012001902003820038999631001880010208000020800002003820038118002110910108000010000005020316232003580000102003920039200392003920039
800242003815000000392580010108000010800005064000012001902003820038999631001880010208000020800002003820038118002110910108000010000005020216332003580000102003920039200392003920039
8002420038150000006342580010108000010800005064000012001902003820038999631001880010208000020800002003820038118002110910108000010000005020316342003580000102003920039200392003920039
800242003815000000392580010108000010800005064000012001902003820038999631001880010208000020800002003820038118002110910108000010000005020316242003580000102003920039200392003920039
800242003815000000392580010108000010800005064000012001902003820038999631001880010208000020800002003820038118002110910108000010000005020316342003580000102003920039200392003920039