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

NEG (vector, 8B)

Test 1: uops

Code:

  neg v0.8b, v0.8b
  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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100420371506116862510001000100026452112018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
100420371506116862510001000100026452112018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
1004203715846116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
100420371506116862510001000100026452102018203720371571318951000100010002037203711100110003073116111786100020382038203820382038
100420371506116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
1004203715082168625100010001000264521020182037203715713189510001000100020372037111001100001273116111786100020382038203820382038
100420371506116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
1004203716082168625100010001000264521020182037203715713189510001000100020372037111001100010073116111786100020382038203820382038
100420371506116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038
1004203715276116862510001000100026452102018203720371571318951000100010002037203711100110000073116111786100020382038203820382038

Test 2: Latency 1->2

Code:

  neg v0.8b, v0.8b
  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)1e3f4e51schedule 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)accfd0d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715000611968625101001001000010010000500284752102001820037200371842131874510100200100002001000020037200371110201100991001001000010000710011611197910100001002003820038200382003820038
102042003715000611968625101001001000010010000500284752102001820037200371842131874510100200100002001000020037200371110201100991001001000010000710011611197910100001002003820038200382003820038
1020420037150001511968625101001001000010010000500284752102001820037200371842131874510100200100002001000020037200371110201100991001001000010013710011611197910100001002003820038200382003820038
102042003715000611968625101001001000010010000500284752112001820037200371842131874510100200100002001000020037200371110201100991001001000010000710011611197910100001002003820038200382003820038
102042003715000611968625101001001000010010000500284752102001820037200371842131874510100200100002001000020037200371110201100991001001000010000710011611197910100001002003820038200382003820038
102042003715000611968625101001001000010010000500284752112001820037200371842131874510100200100002001000020037200371110201100991001001000010000710011611197910100001002003820038200382003820038
102042003715000611968625101001001000010010000500284752112001820037200371842131874510100200100002001000020037200371110201100991001001000010000710011611197910100001002003820038200382003820038
102042003715000611968625101001001000010010000500284752102001820037200371842131874510100200100002001000020037200372110201100991001001000010000710011611197910100001002003820038200382003820038
1020420037150001381968625101001001000010010000500284752112001820037200371842131874510100200100002001000020037200371110201100991001001000010000710011611197910100001002003820038200382003820038
102042003715000841968625101001001000010010000500284752102001820037200371842131874510100200100002001000020037200371110201100991001001000010000710011611197910100001002003820038200382003820038

1000 unrolls and 10 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)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
1002420037150000000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000000306402162219786010000102003820038200382003820038
100242003716100001200268196864510010101000010100005028487850200182003720037184473187851001020100002010000200372003711100211091010100001000000006402162219856010000102003820085200382003820038
1002420037150000000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000000306402162219786010000102003820038200382003820038
1002420037150000000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000000306402162219786010000102003820038200382003820038
10024200371500000000103196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000000006402162219786010000102003820038200382003820038
1002420037157000000061196864510010111000010100005028475210200182003720037184433187671001020100002010000200372003721100211091010100001000010006402162219910010000102003820038200382003820038
10024200371500000000611968610410010101000010101525028500490200182003720037184433187671001020100002010000200372003711100211091010100001000000006402162219790010000102003820038200382003820038
1002420037150000000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000000006402162219786010000102003820038200382003820038
100242003715000000001844196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000000006402162219786010000102003820038200382003820038
1002420037150000000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000000006402162219786010000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  neg v0.8b, v8.8b
  neg v1.8b, v8.8b
  neg v2.8b, v8.8b
  neg v3.8b, v8.8b
  neg v4.8b, v8.8b
  neg v5.8b, v8.8b
  neg v6.8b, v8.8b
  neg v7.8b, v8.8b
  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)9facbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfmap dispatch bubble (d6)fetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200571500292580108100800081008002050064013202001920038200389977699898012020080032200800322008920038118020110099100100800001000111511816020035800001002003920039200392003920039
80204200381500292580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000111511816020035800001002003920039200392003920039
80204200381500292580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000111511816020035800001002003920039200392003920039
80204200381500522580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000111511816020035800001002003920039200392003920039
802042003815002832580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000111511816020035800001002003920039200392003920039
80204200381500292580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000111511816020035800001002003920039200392003920039
802042003815001022580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000111511816020035800001002003920039200392003920039
802042003815001152580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000111511816020035800001002003920039200392003920039
80204200381500292580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000111511816020035800001002003920039200392003920039
80204200381500292580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000111511816020035800001002003920039200392003920039

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)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)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242005015000392580010108000010800005064000020019200382003899963100188001020800002080000200382003811800211091010800001005020416112003580000102003920039200392003920039
800242003815000392580010108000010800005064000020019200382003899963100188001020800002080000200382003811800211091010800001005020216222003580000102003920039200392003920039
800242003815000392580010108000010800005064000020019200382003899963100188001020800002080000200382003811800211091010800001005020216332003580000102003920039200392003920039
800242003815090392580010108000010800005064000020019200382003899963100188001020800002080000200382003811800211091010800001005020116112003580000102003920039200392003920039
800242003814900392580010108000010800005064000020019200892003899963100188001020800002080000200382003811800211091010800001005020216112003580000102003920039200392003920039
800242003815000392580010108000010800005064000020019200382003899963100188001020800002080000200382003811800211091010800001005020117112003580000102003920039200392003920039
800242003815000392580010108000010800005064000020019200382003899963100188001020800002080000200382003811800211091010800001005020116112003580000102003920039200392003920039
800242003815000572580010108000010800005064000020019200382003899963100188001020800002080000200382003811800211091010800001005020116222003580000102003920039200392003920039
800242003815000392580010108000010800005064000020019200382003899963100188001020800002080000200382003811800211091010800001005020116112003580000102003920039200392003920039
800242003815000392580010108000010800005064000020019200382003899963100188001020800002080000200382003811800211091010800001005020116222003580000102003920039200392003920039