Apple M1 Microarchitecture Research by Dougall Johnson

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

FRINT32Z (scalar, D)

Test 1: uops

Code:

  frint32z d0, d0
  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)03080b18191e1f3f4e51inst 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)a0a1a6a7a8a9acc2cfd0d5d6ddinst fetch restart (de)e0? fp/simd (ee)f5f6f7f8fd
1004303724000000612547251000100010003981601301830373037241432895100010001000303730371110011000000000001040231222761100030383131308530383158
1004313324001226401772538431008101611504008641309030853084242111292612881387133130373132211001100000001243050880233222712100031343038315130383085
10043131240112264176835253843100810001300400864130903157308424316293213001210116131203132211001100000200228630790232222674100030853132308530853134
100431312410201441767452529251016100810003995121301830853133243212291010001242116131303084311001100000002028480950232222700100031693074312030743133
100431322410122648861254725100010001000398160030183037303724143289510001000100030373037111001100000000000730216222629100030383038303830383038
1004303723000012061254725100010001000398160030183037303724143289510001000100030373037111001100000010258650940224222696100030853038308631223122
1004308523000227617621472529421024100813003981600309031323168242012294510321162116231313167311001100000000028400940245222701100031333074307431333085
1004307324011326488572253825100810081150399512130183084313324148291410641322133031213085311001100004020030250940224222658100030383038308630863038
1004308424101114488867253843100810081150399512030543084308524147291410751162116130833085211001100000000230102940216222664100030853086308630853086
100430732411111328882253844100810081150399512030543085308524147291511501161100030373037111001100000000000730216222629100030383038303830383038

Test 2: Latency 1->2

Code:

  frint32z d0, d0
  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)031e3f4e51inst 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)9fa8accdcfd2d5d6ddinst fetch restart (de)e0ea? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
102043003723306129547251010010010000100100005004277160030018300373003728271728740101002001000820010008300373003711102011009910010010000100001739001600296460100001003003830038300383003830038
102043003723306129547251010010010000100100005004277160130018300373003728271628740101002001000820010008300373003711102011009910010010000100000710011611296330100001003003830038300383003830038
102043003723306129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100000710011611296330100001003003830038300383003830038
102043003723208929547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100000710011611296330100001003003830038300383003830038
102043003723306129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100000710011611296330100001003003830038300383003830038
102043003723206129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100000710011611296333100001003003830038300383003830038
1020430037233072629547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100000710011611296330100001003003830038300383003830038
102043003723306129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000710011611296330100001003003830038300383003830038
102043003723306129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373008411102011009910010010000100000710011611296330100001003003830038300723003830038
102043003723206129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000710011611296330100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire (01)cycle (02)030b1e3f4e51inst 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)9fa0a8acc2c5cfd5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
100243003722500612954725100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010000006402162229629010000103003830038300383003830038
100243003722500612954725100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010000006402162229629010000103003830038300383003830038
100243003722500612954725100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010000006402162229695010000103003830038300383003830038
100243003722500612954725100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010000006402162229629010000103003830038300383003830038
1002430037224006129547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100030006402162229629010000103003830038300383003830038
100243003722500612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000006402162229629010000103003830038300383003830038
100243003722500612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000006402162229629010000103003830038300383003830038
100243003722500612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000006403162229629010000103003830038300383003830038
100243003722500612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000006402162229629010000103003830038300383003830038
100243003722500612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000006402162229629010000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  frint32z d0, d8
  frint32z d1, d8
  frint32z d2, d8
  frint32z d3, d8
  frint32z d4, d8
  frint32z d5, d8
  frint32z d6, d8
  frint32z d7, d8
  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)0318191e1f3f51inst 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)696b6d6edispatch 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)cdcfd5d6e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
802042006115500003025801081008000810080020500640132200200200392003999776999080120200800322008003220039200391180201100991001008000010000111511801620036800001002004020040200402004020040
802042003915500003025801081008000810080020500640132200200200392003999776999080120200800322008003220039200391180201100991001008000010000111511801620036800001002004020040200402004020040
802042003915500003025801081008000810080020500640132200200200392003999776999080120200800322008003220039200391180201100991001008000010000111511801620036800001002004020040200402004020040
80204200391610010803025801081008000810080020500640132200200200392003999776999080120200800322008003220039200391180201100991001008000010000111511801620036800001002004020040200402004020040
802042003915500003025801081008000810080020500640132200200200392003999776999080120200800322008003220039200391180201100991001008000010000111511801620036800001002004020040200402004020040
802042003915500003025801081008000810080020500640132200200200392003999776999080120200800322008003220039200391180201100991001008000010000111511801620036800001002004020040200402004020040
8020920039155002703025801081008000810080020500640132200200200392003999776999080120200800322008003220039200391180201100991001008000010020111511801620036800001002004020040200402004020040
802042003915500003025801081008000810080020500640132200200200392003999776999080120200800322008003220039200391180201100991001008000010000111511801620036800001002004020040200402004020040
802042003915500003025801081008000810080020500640132200203200392003999776999080120200800322008003220039200391180201100991001008000010000111511801620036800001002004020040200402004020040
8020420039161000050525801081008000810080020500640132200200200392003999776999080120200800322008003220039200391180201100991001008000010000111511801620036800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire (01)cycle (02)031e1f3f51inst 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)9fa1a8accdcfd2icache miss (d3)d5d6d9daddinst fetch restart (de)e0ea? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
8002420051155150402580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100100502000116001120036080000102004020040200402004020040
800242003915500402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100000502000116001120036080000102004020040200402004020040
8002420039155120402580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100000502000116001120036080000102004020040200402004020040
800242003915600402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100000502000116001120036080000102004020040200402004020040
80024200391559264462580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100000502000116201120036080000102004020040200402004020040
8002420039155304025800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001002005020001160011200361580000102004020040200402004020040
800242003915500402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100000502000116001120036080000102004020040200402004020040
80024200391554320402580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100000502000116001120036080000102004020040200402004020040
800242003915500402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100000502000116001120036080000102004020040200402004020040
80024200391552730402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100000502000116001120036080000102004020040200402004020040