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

FRINTM (scalar, H)

Test 1: uops

Code:

  frintm h0, h0
  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)0318191e1f3f4e51schedule 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 tlb access (a0)l1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100430372300306125472510001000100039816013018303730372414328951000100010003037303711100110000030094216112629100030383038303830383038
1004303724000021525472510001000100039816003018303730372414328951000100010003037303711100110000003073116112629100030383038303830383038
100430372300006125472510001000100039816003018303730372414328951000100010003037303711100110000000073116112629100030383038303830383038
100430372200006125472510001000100039816013018303730372414328951000114611623085307321100110002001073116112629100030383038303830383038
100430372300006125472510001000100039816003018303730372414328951000100010003037303711100110000000073116112629100030383086303830383038
100430372300006125472510001000100039816003018303730372414328951000100010003037303711100110000000073116112629100030383038303830383038
100430372200006125472510001000100039816003018303730372414328951000100010003037303711100110000000073116112629100030383038303830383038
1004303722001506125472510001000100039816003018303730372414328951000100010003037303711100110000000073116112629100030383038303830383038
100430372300006125472510001000100039816003018303730372414328951050100011683037308511100110000000073116112629100030383038303830383038
100430372200006125472510001000100039816013018303730372414328951000100010003037303711100110000000073116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  frintm h0, h0
  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)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)acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204300372250000103295472510100100100001001000050042771600300183003730037282716287411010020010008200100083003730037111020110099100100100001000011171801600296460100001003003830038300383003830038
1020430037225003061295472510100100100001001000050042771600300183003730037282717287411010020010008200100083003730037111020110099100100100001000011171701600296450100001003003830038300383003830038
1020430037225000061295472510100100100001001000050042771600300183003730037282716287411010020010008200100083003730037111020110099100100100001000011171701600296450100001003003830038300383003830038
1020430037225000061295472510100100100001001000050042771600300183003730037282716287401010020010008200100083003730037111020110099100100100001000011171701600296460100001003003830038300383003830038
10204300372240090383295472510100100100001001000050042771600300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
10204300372250000612954725101001001000010010000500427716003001830037300372826432874510100200100002001000030037300371110201100991001001000010000000710116112963326100001003003830038300383003830038
10204300372240000103295472510100100100001001000050042771600300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
1020430037225000061295472510100100100001001000050042771600300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
1020430037225000061295472510100100100001001000050042771600300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038
1020430037225000061295472510100100100001001000050042771601300183003730037282643287451010020010000200100003003730037111020110099100100100001000000071011611296330100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03mmu table walk data (08)l2 tlb miss instruction (0a)18191e1f3f4e51schedule 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)st unit uop (a7)l1d cache writeback (a8)a9acc2cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002430131260110152808229547251001012100081110150504278512030054301303008428291102878610010201016120100003003730037111002110910101000010243110040640716232966710000103003830085300383003830086
10024300852600032360108139029520251001010100001010150554277160030018300373003728291202878710163201048620101623017730133111002110910101000010202000320640216232962910000103003830038300383003830038
1002430037241000060612954731100101010000101030050427716003001830037300852829272876710010201000020100003003730084111002110910101000010000000000640216222962910000103003830038300383003830038
1002430037241000000612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000000640216222962910000103003830038300383003830038
1002430037241000000612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000000640216222962910000103003830038300383003830038
10024300372410000007262954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000000640216222962910000103003830038300383003830038
10024300372320000120612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000000640216222962910000103003830038300383003830038
100243003723300005700612954725100101010000101000050427716003001830037300372828632876710010201000020101613003730037111002110910101000010000000000640223222962910000103003830038300383003830038
1002430037229000000612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000000640216222962910000103003830038300383003830038
1002430037229000000612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000000640216222962910000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  frintm h0, h8
  frintm h1, h8
  frintm h2, h8
  frintm h3, h8
  frintm h4, h8
  frintm h5, h8
  frintm h6, h8
  frintm h7, h8
  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)60696b6d6emap 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 cache writeback (a8)acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)fetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042003915503025801081008000810080020500640132020020020039200399977699908012020080032200800322003920039118020110099100100800001000101115118116020036800001002004020040200402004020040
8020420039155030258010810080008100800205006401320200200200392003999776999080120200800322008003220039200391180201100991001008000010001901115118016020036800001002004020040200402004020040
8020420039155030258010810080008100800205006401320200200200392003999776999080120200800322008003220039200391180201100991001008000010002001115118016020036800001002004020040200402004020040
802042003915503025801081008000810080020500640132020020020039200399977699908012020080032200800322003920039118020110099100100800001000301115118016020036800001002004020040200402004020040
802042003915503025801081008000810280020500640132120020020039200399977699908012020080032200800322003920039118020110099100100800001000101115118016020098800001002004020040200402004020040
802042003915512695258010810080008100800205006401320200200200392003999776999080120200800322008003220039200391180201100991001008000010000691115118016020036800001002004020040200402004020040
802042003916003025801081008000810080020500640132020020020039200399977699908012020080032200800322003920039118020110099100100800001000001115118016020036800001002004020040200402004020040
802042003915503025801081008000810080020500640132020020020039200399977699908012020080032200800322003920039118020110099100100800001000001115118016020036800001002004020040200402004020040
8020420039155072258010810080008100800205006401320200200200392003999776999080120200800322008003220039200391180201100991001008000010000661115118016020036800001002004020040200402004020040
8020420039155123025805081008000810080020500640132020020020039200399977699908012020080032200800322003920039118020110099100100800001000101115118016020036800001002004020040200402004020040

1000 unrolls and 10 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)18191e1f3a3f51schedule 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? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200501550000000070525800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000000005020416552003680000102004020040200402004020040
80024200391550000012008225800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000000005020516652003680000102004020040200402004020040
80024200391550000012004025800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000000005020416652003680000102004020040200402004020040
8002420039155000000004025800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000000005020616562003680000102004020040200402004020040
8002420039155000000004025800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000000005020516762003680000102004020040200402004020040
8002420039155000000004025800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000000005020616652003680000102004020040200402004020040
8002420039156000000004025800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000000005020616572004680000102004020040200402004020040
8002420039155000000004025800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000000005020716552003680000102004020040200402004020040
8002420041156000000004025800101080000108000050640000120020200392003999963100198001020800002080000200392003911800211091010800001002000005020616662003680000102004020040200402004020040
8002420039155000000004025800101080000108000050640000120020200392003999963100198001020800002080000200392003911800211091010800001000000005020516572003680000102004020040200402004020040