Apple M1 Microarchitecture Research by Dougall Johnson

Firestorm: Overview | Base Instructions | SIMD and FP Instructions
Icestorm:  Overview | Base Instructions | SIMD and FP Instructions

FRINT64Z (vector, 4S)

Test 1: uops

Code:

  frint64z v0.4s, v0.4s
  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 (01)cycle (02)031e3f4e51inst issue (52)~issue fp/simd (54)~dispatch fp/simd (57)huge thing fp/simd (5b)60696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op fp/simd (7e)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst neon or fp (9a)a8accfd5d6ddinst fetch restart (de)e0? fp/simd (ee)f5f6f7f8fd
100430372406125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303724010325472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372406125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303724010325472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372406125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303724025125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372406125472510001000100039816013018303730372414328951000100010003037303711100110002073116112629100030383038303830383038
100430372406125472510001000100039816013018303730372414328951000100010003037303711100110001073116112629100030383038303830383038
100430372536125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  frint64z v0.4s, v0.4s
  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 3.0037

retire (01)cycle (02)0308090b18191e1f3a3f4e51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)6061696d6edispatch stall (70)72scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa0a1a6a8a9acc2cfd0d2d5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
102043003723300000210061295472510100100100001001000050042771600530018300373003728264032874510100200100002001000030037300371110201100991001001000010000000007100011611296330100001003003830038300383003830038
10204300372320000000061295472510100100100001001000050042771600030018300373003728264032874510100200100002001000030037300371110201100991001001000010000010007105011611296330100001003003830038300383003830038
102043003723300003180061295472510100100100001001000050042771600030018300373003728264032874510100200100002001000030037300371110201100991001001000010000000007100011611296330100001003003830038300383003830038
10204300372320000000061295472510100100100001001000050042771600030018300373003728264032874510100200100002001000030037300371110201100991001001000010000000007100011611296330100001003003830038300383003830038
10204300372330000000061295472510100100100001001000050042771601530018300373003728264032874510100200100002001000030037300371110201100991001001000010000000007100111611296330100001003003830038300383003830038
10204300372330000000061295472510100100100001001000050042771601530018300373003728264032874510100200100002001000030037300371110201100991001001000010000000007100011611296330100001003003830038300383003830038
1020430037233000003300536295472510100100100001001000050042771601530018300373003728264032874510100200100002001000030037300371110201100991001001000010000000007105111611296330100001003003830038300383003830038
102043003723300003300061295472510100100100001001000050042771600030018300373003728264032874510100200100002001000030037300371110201100991001001000010000010007105111611296330100001003003830038300383003830038
10204300372330000000061295472510100100100001001000050042771600030018300373003728264032874510100200100002001000030037300371110201100991001001000010000000007105111611296330100001003003830038300853003830038
10204300372320000000061295472510100100100001001000050042771600030018300373003728264032874510100200100002001000030037300371110201100991001001000010000000007105111611296330100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire (01)cycle (02)03080b18191e3f4e51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)60696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa0a8accfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
100243003722500000612954725100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010000640216222962910000103003830038300383003830038
100243003722500000612952925100101010000101015072427716013001830037300372828632876710462201000020100003003730037111002110910101000010000640216222962910000103003830038300383003830038
1002430037225000007262954725100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010000640216222962910000103003830038300383003830038
100243003722500009612954725100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010000640216222962910000103003830038300383003830038
100243003723200000612954725100101010000101000050427716013001830178300372828632876710010201048820100003003730037111002110910101000010010640216222962910000103003830038300383003830038
100243003722500000612954725100101010000101000050427716013001830037300372828632876710010201000022100003003730037111002110910101000010000640216222977310000103003830038300383003830038
10024300372251000121032954796100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010003640216222962910000103003830038300383003830038
100243003722500006612954725100201010000101000060427716013001830037300372828632876710010201016220100003003730037111002110910101000010000640216222962910000103003830038300383003830038
100243003722500000612954725100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010010640216222962910000103003830038300383003830038
1002430037225000012612954725100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010000640216222962910000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  frint64z v0.4s, v8.4s
  frint64z v1.4s, v8.4s
  frint64z v2.4s, v8.4s
  frint64z v3.4s, v8.4s
  frint64z v4.4s, v8.4s
  frint64z v5.4s, v8.4s
  frint64z v6.4s, v8.4s
  frint64z v7.4s, v8.4s
  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 (01)cycle (02)030e181e3f51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)6061696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa8acc5branch mispredict (cb)cdcfd0d2d6dde0ea? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
802042003915600030258010810080008100800205006401321520020200392003999776999080120200800322008003220039200391180201100991001008000010000111511851160200360800001002004020040200402004020040
802042003915500072258010810080008100800205006401321520020200392003999776999080120200800322008003220039200391180201100991001008000010000111511851160200360800001002004020040200402004020040
802042003915500030258010810080008100800205006401321520020200912003999776999080120200800322008003220039200391180201100991001008000010000111511851160200360800001002004020040200402004020040
802042003915500030258010810080008100800205006401321520020200392003999776999080120200800322008003220039200391180201100991001008000010000111511851160200360800001002004020040200402004020040
802042003915500030258010810080008100800205006401321520020200392003999776999080120200801382008003220039200391180201100991001008000010000111511801160200360800001002004020040200402004020040
802042003915500030258010810080008100800205006401321520020200392003999776999080120200800322008003220039200391180201100991001008000010000111511851160200360800001002004020040200402004020040
802042003915500030258010810080008100800205006401321520020200392003999776999080120200800322008003220039200391180201100991001008000010000111513451160200360800001002004020040200402004020040
8020420039155001230258010810080008100800205006401321520020200392003999776999080120200800322008003220039200391180201100991001008000010000111511851160200360800001002004020040200402004020040
802042003916100030258010810080008100800205006401321020020200392003999776999080120200800322008003220039200391180201100991001008000010010111511851160200360800001002004020040200402004020040
8020420090155001230258010810080008100800205006401321020020200392003999776999080120200800322008003220039200391180201100991001008000010000111511801160200360800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire (01)cycle (02)03080b18191e1f3a3f4651inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)60696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa1a6a7a8a9acc2cfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
80024200511550000000515025800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000000005020516332003680000102004020040200402004020040
8002420039155000000040025800101080000108000050640000120020200392003999963100198001020800002080000200392003911800211091010800001000000005020316322003680000102004020040200402004020040
8002420039156000000040025800101080000108000050640000120020200392003999963100198001020800002080000200392003911800211091010800001000000005020316232003680000102004020040200402004020040
8002420039155000000040025800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000000005020316332003680000102004020040200402004020040
8002420039155000000040025800101080000108000050640000120022200392003999963100198001020800002080000200392003911800211091010800001000000005020216232003680000102004020040200402004020040
8002420039155000000040025800101080000108000050640000120020200392003999963100198001020800002080000200392003911800211091010800001000000005020316232003680000102004020040200402004020040
8002420039155000000040025800101080000108000050640000120020200392003999963100198001020800002080000200392003911800211091010800001000000005020316322003680000102004020040200402004020040
8002420039155000000040025800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000000005020316332007880000102004020040200402004020040
8002420039155000060040025800101080097108000050640000120020200392003999963100198001020803072080624203022034871800211091010800001022010283805124480442027580000102024620397203452034220343
800242034015801268046160306308280700128058510806235064490802025920354202911005228101778065020804152080732204012034771800211091010800001020000333005020316322003680000102004020040200402011520040