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

FRINTN (vector, 2D)

Test 1: uops

Code:

  frintn v0.2d, v0.2d
  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)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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
10043037230612547251000100010003981603018303730372414328951000100010003037303711100110001073116112629100030383038303830383038
10043037230612547251000100010003981603018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037230612547251000100010003981603018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037240612547251000100010003981603018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372301032547251000100010003981603018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037240612547251000100010003981603018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037240612547251000100010003981603018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372301032547251000100010003981603018303730372414328951000100010003037303711100110001277073116112629100030383038303830383038
100430372401032547251000100010003981603018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037230612547251000100010003981603018303730372414328951000100010003037303711100110000073116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  frintn v0.2d, v0.2d
  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 uop (01)cycle (02)0318191e3f4e51schedule 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)acc2branch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102043003723200045029547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000007101161129633100001003003830038300383003830038
102043003723200060829547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100000007101161129633100001003003830038300383003830038
102043003723300017429547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100010007101161129633100001003003830038300383003830038
102043003723300016629547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000007101161129633100001003003830038300383003830038
102043003723300044829547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100000007101161129633100001003003830038300383003830038
102043003723210015629547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100000007101161129633100001003003830038300383003830038
102043003723200051929547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000007101161129633100001003003830038300383003830038
102043003723300045929547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100000007101161129633100001003003830038300383003830038
102043003723200010329547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000007101161129633100001003003830038300383003830038
102043003723200016729547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000007101161129633100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

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 tlb miss (a1)l1d cache writeback (a8)acbranch mispred nonspec (cb)cfl1i cache miss demand (d3)d5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002430037232061295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000006400216222962910000103003830038300383003830038
1002430037233061295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000006400216222962910000103003830038300383003830038
1002430037233061295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000006400216222962910000103003830038300383003830038
1002430037233061295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000006610216222962910000103003830038300383003830038
1002430037233061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000006400216222969910000103003830038300383003830038
1002430037233061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001001306400216222962910000103003830038300383003830038
1002430037233061295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000316400216222962910000103003830038300383003830038
1002430037233061295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000006400232232962910000103018130038300383008830038
10024300372331261295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001002006400216222962910000103003830038300383003830038
1002430037232061295472510010101000010102965042771600300543003730037282863287671001020100002010000300373013211100211091010100001003306400253222962910000103003830133300383003830179

Test 3: throughput

Count: 8

Code:

  frintn v0.2d, v8.2d
  frintn v1.2d, v8.2d
  frintn v2.2d, v8.2d
  frintn v3.2d, v8.2d
  frintn v4.2d, v8.2d
  frintn v5.2d, v8.2d
  frintn v6.2d, v8.2d
  frintn v7.2d, v8.2d
  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)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)9facbranch cond mispred nonspec (c5)branch ret indir mispred nonspec (c8)branch mispred nonspec (cb)cdcfmap dispatch bubble (d6)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420061155273025801081008000810080020500640132020020200392003999770699908012020080032200800322003920039118020110099100100800001000101151181620036800001002004020040200402004020040
80204200391551850525801081008000810080020500640132020020200392003999770699908012020080032200800322003920039118020110099100100800001000101151181620036800001002004020040200402004020040
80204200391555043025801081008000810080020500640132020020200392003999770699908012020080032200800322003920039118020110099100100800001000101151181620036800001002004020040200402004020040
802042003915603025801081008000810080020500640132020020200392003999770699908012020080032200800322003920039118020110099100100800001000101151181620036800001002004020040200402004020040
802042003915503025801081008000810080020500640132120020200392003999770699908012020080032200800322003920039118020110099100100800001000101151181620036800001002004020040200402004020040
802042003915603025801881008000810080020500640132120020200392003999770699908012020080032200800322003920039118020110099100100800001000101151181620036800001002004020040200402004020040
8020420039155243025801081008000810080020500640132020020200392003999770699908012020080032200800322003920039118020110099100100800001000101151181620036800001002004020040200402004020040
802042003915503025801081008000810080020500640132120020200392003999770699908012020080032200800322003920039118020110099100100800001000101151181620036800001002004020040200402004020040
8020420039156183025801081008000810080020500640132120020200392003999770699908012020080032200800322003920039118020110099100100800001000101151181620036800001002004020040200402004020040
802042003915503025801081008000810080020500640132020020200392003999770699908012020080032200800322003920039118020110099100100800001000101151181620036800001002004020040200402004020040

1000 unrolls and 10 iterations

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

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)ld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)ea? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242003915500003630402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100000030502011611200360080000102004020040200402004020040
80024200391550000540402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100000000502011611200360080000102004020040200402004020040
80024200391550000180402580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100000000502011611200360080000102004020040200402004020040
80024200391550000510402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100000000502011611200360080000102004020040200402004020040
80024200391560000480402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100001030502011611200360080000102004020040200402004020040
80024200391550000270402580010108000010800005064000012002020039200399996310072800102080000208000020039200391180021109101080000100000000502011611200360080000102004020040200402004020040
800242003915500003305152580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100000000502011611200360080000102004020040200402004020040
80024200391550000900402580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000100000000502011611200360080000102004020040200402004020040
8002420039155000000402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100000000502011611200360080000102004020040200402004020040
8002420039156000000402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100000000502011611200360080000102004020040200402004020040