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

FRINTP (vector, 2S)

Test 1: uops

Code:

  frintp v0.2s, v0.2s
  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)03mmu table walk instruction (07)l2 tlb miss instruction (0a)1e3a3f4e51schedule 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
10043037241102682547251000100010003981603018303730372414328951000100010003037303711100110000077416442629100030383038303830383038
10043037231102682547251000100010003981603018303730372414328951000100010003037303711100110000077416442629100030383038303830383038
100430372411021102547251000100010003981603018303730372414328951000100010003037303711100110000077416442629100030383038303830383038
10043037231102682547251000100010003981603018303730372414328951000100010003037303711100110000077416442629100030383038303830383038
10043037231102682547251000100010003981603018303730372414328951000100010003037303711100110000377416442629100030383038303830383038
100430372311021102547251000100010003981603018303730372414328951000100010003037303711100110000377416442629100030383038303830383038
10043037241102682547251000100010003981603018303730372414328951000100010003037303711100110000377416442629100030383038303830383038
10043037231102682547251000100010003981603018303730372414328951000100010003037303711100110000377416442629100030383038303830383038
10043037241102682547251000100010003981603018303730372414328951000100010003037303711100110000077416442629100030383038303830383038
10043037241102682547251000100010003981603018303730372414328951000100010003037303711100110000077416442629100030383038303830383038

Test 2: Latency 1->2

Code:

  frintp v0.2s, v0.2s
  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)03091e3a3f4e51schedule 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)6061696b6d6emap 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)acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd0d2d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204300372330003122954725101001001000010010000500427716000300180300373003728271728740101002001000820010008300373003711102011009910010010000100001117170011611296450100001003003830038300383003830038
10204300372330001492954725101001001000010010000500427716000300180300373003728271728741101002001000820010008300373003711102011009910010010000100001117170012611296450100001003003830038300383003830038
1020430037233000682954725101001001000010010000500427716000300180300373003728264328745101002001000020010000300373003711102011009910010010000100030007100021622296330100001003003830038300383003830038
1020430037233000822954725101001001000010010000500427716000300180300373003728264328745101002001000020010000300373003711102011009910010010000100130007100021622296330100001003003830038300383003830038
1020430037233000612954725101001001000010010000500427716000300180300373003728264328745101002001000020010000300373003711102011009910010010000100000007100021622296330100001003003830038300383003830038
1020430037232000612954725101001001000010010000500427716000300180300373003728264328745101002001000020010000300373003711102011009910010010000100000007100021622296330100001003003830038300383003830038
1020430037233000612954725101001001000010010000500427716000300180300373003728264328745101002001000020010000300373003711102011009910010010000100000007100021622296330100001003003830038300383003830038
1020430037233000612954725101001001000010010000500427716000300180300373003728264328745101002001000020010000300373003711102011009910010010000100000007100021622296330100001003003830038300383003830038
10204300372330120612954725101001001000010010000500427716000300180300373003728264328745101002001000020010000300373003711102011009910010010000100000007100021622296330100001003003830038300383003830038
1020430037233000612954725101001001000010010000500427716000300180300373003728264328745101002001000020010000300373003711102011009910010010000100000007100021622296330100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)0318191e1f3f4e51schedule 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)acc2branch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
100243003722500001223295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000006404162229629010000103003830038300383003830038
10024300372250000145295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000006402162229629010000103003830038300383003830038
10024300372240000814295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000006402162229629010000103003830038300383003830038
10024300372250000876295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001006006402242229629010000103003830038300383003830038
10024300372250000147295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000006402162229629010000103003830038300383003830038
10024300372250000355295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001010006402162229629010000103003830038300383003830038
10024300372250000927295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000006402162229629010000103003830038300383003830038
10024300372250000420295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000006402162229629010000103003830038300383003830038
10024300372250000906295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000006402162229629010000103003830038300383003830038
1002430037224000082295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000006402162229629010000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  frintp v0.2s, v8.2s
  frintp v1.2s, v8.2s
  frintp v2.2s, v8.2s
  frintp v3.2s, v8.2s
  frintp v4.2s, v8.2s
  frintp v5.2s, v8.2s
  frintp v6.2s, v8.2s
  frintp v7.2s, v8.2s
  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)03mmu table walk instruction (07)mmu table walk data (08)l2 tlb miss instruction (0a)l2 tlb miss data (0b)181e3f51schedule 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)a9acc2branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042003915511102030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000011151181161120036800001002004020040200402004020040
802042003915510100030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000011151181161120036800001002004020040200402004020040
802042003915510100030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000011151181161120036800001002004020040200402004020040
8020420039155101000600258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000011151181161120036800001002004020040200402004020040
802042003915510100030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003921802011009910010080000100000011151181161120036800001002004020040200402004020040
802042003915610100030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000011151181161120036800001002004020040200402004020040
802042003915510100030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000011151181162120036800001002004020040200402004020040
802042003915510100030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100000011151181161120036800001002004020040200402004020040
802042003915510100030258010810080008100800205006401320200202009920039997769990801202008003220080032200392003951802011009910010080000100000011151181161220036800001002004020040200402004020040
8020420039155000000505258010810080008100800205006401321200202003920039997769990801202008003220080032200392003911802011009910010080000100000011151182161120036800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)031e1f243a3f51schedule 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)accfd5map dispatch bubble (d6)dbddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420051155000044325800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000050203160322003680000102004020040200402007720040
800242003915600006325800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000050203160312003680000102004020040200402004020040
800242003915500008225800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000050204160612003680000102004020040200402004020040
800242003915600004025800101080000108000050640000120020200392003999963100198001020800002080000200392003911800211091010800001000050202160312003680000102004020040200402004020040
800242003915600004025800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001007050203160312003680000102004020040200402004020040
800242003915500004025800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001001050203160512003680000102004020040200402004020040
800242003915500004025800101080000108000050640000120020200392003999963100198001020800002080000200392003911800211091010800001000050203160312003680000102004020040200402004020040
800242003915500006325800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000050203160212003680000102004020040200402004020040
8002420039156000040258001010800001080000506400000200202003920039999631100198001020800002080000200392003911800211091010800001000050205160322003680000102004020040200402004020040
800242003915500004025800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000050204160522003680000102004020040200402004020040