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 (vector, 4H)

Test 1: uops

Code:

  frintm v0.4h, v0.4h
  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)03l2 tlb miss data (0b)181e3f4e51schedule 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)ld unit uop (a6)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
1004303724000612547251000100010003981600301830373037241432895100010001000303730371110011000012073116112629100030383038303830383038
100430372400061254725100010001000398160030183037308424143289510001000100030373037111001100000073116112629100030383038303830383038
100430372300061254725100010001000398160030183037303724143289510001000100030373037111001100009073116112629100030383038303830383038
100430372400061254725100010001000398160030183037303724143289510001000100030373037111001100000073116112629100030383038303830383038
1004303723000103254725100010001000398160030183037303724143289510001000100030373037111001100001073116112629100030383038303830383038
1004303723000612547251000100010003981600301830373037241432895100010001000303730371110011000001873116112629100030383038303830383038
100430372410061254725100010001000398160030183037303724143289510001000100030373037111001100000073116112629100030383038303830383038
100430372300061254725100010001000398160030183037303724143289510001000100030373037111001100000073116112629100030383038303830383038
100430372500061254725100010001000398160130543084303724143289510001000100030373084111001100000073116112629100030383038303830383038
100430372300061254725100010001000398160030183037303724143289510001000100030373037111001100000073116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  frintm v0.4h, v0.4h
  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)03mmu table walk data (08)l2 tlb miss data (0b)18191e1f3a3f4e51schedule 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)st unit uop (a7)l1d cache writeback (a8)a9acc2branch 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
1020430037232000000028629547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000000000071011611296330100001003003830038300383003830038
102043003723300000006129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000000000071011611296330100001003003830038300383003830038
102043003723300000008429547251010010010000104100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000000000071011611296330100001003003830038300383003830038
102043003724100000006129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000003000071011611296330100001003003830038300383003830038
1020430037233000000019129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000000000071011611296330100001003003830038300383003830038
102043003723200000006129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000000000071011611296330100001003003830038300383003830038
102043003723300000006129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000000000071011611296330100001003003830038300383003830038
102043003723200000008429547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000003000071011611296330100001003003830038300383003830038
1020430037232000000058429547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000000010071011611296330100001003003830038300383003830038
102043003723300000006129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100000000000071011611296330100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03mmu table walk data (08)1e1f3f4e51schedule 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
100243003722500010942954725100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010006406162229629010000103003830038300383003830038
10024300372250008902954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010006402162229629010000103003830038300383003830038
10024300372250009602954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010006402162229629010000103003830038300383003830038
10024300372250003842954725100101010008101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010006402162229629010000103003830038300383003830038
10024300372250003652954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010006402162229629010000103003830038300383003830038
100243003722500010402954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010006402162229629010000103003830038300383003830038
100243003722500010532954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010006402162229629010000103003830038300383003830038
10024300372250009432954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010006402162229629010000103003830038300383003830038
10024300372250004532954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010006402162229629010000103003830038300383003830038
10024300372250909232954725100101010000101000055427716003001830037300372828632876710010201000020100003003730037111002110910101000010006402162229629010000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  frintm v0.4h, v8.4h
  frintm v1.4h, v8.4h
  frintm v2.4h, v8.4h
  frintm v3.4h, v8.4h
  frintm v4.4h, v8.4h
  frintm v5.4h, v8.4h
  frintm v6.4h, v8.4h
  frintm v7.4h, v8.4h
  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 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)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 miss (a1)l1d cache writeback (a8)branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd2d5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420058156000000072258010810080008100800205006401320200200200392003999776999080120200800322008003220039200391180201100991001008000010001111511800160020036800001002009420040200402004020040
8020420039161000000130258010810080008100800205006401320200200200392003999776999080120200800322008003220039200391180201100991001008000010000111511800160020036800001002004020040200402004020040
8020420039155000000030258010810080008100800205006401321200200200392003999776999080120200800322008003220039200391180201100991001008000010000111511800160020036800001002004020040200402004020040
8020420039155000000030258010810080008100800205006401320200200200392003999776999080120200800322008003220039200391180201100991001008000010000111511800160020036800001002004020040200402004020040
8020420039156000000053258010810080008100800205006401320200200200392003999776999080120200800322008003220039200391180201100991001008000010000111511800160020036800001002004020040200402004020040
8020420039156000000053258010810080008100800205006401320200200200392003999776999080120200800322008003220039200391180201100991001008000010000111511800160020036800001002004020040200402004020040
8020420039155000000030258010810080008100800205006401320200200200392010399776999080120200800322008003220039200391180201100991001008000010000111511800160020036800001002004020040200402004020040
8020420039161000000072258010810080008100800205006401320200200200392003999776999080120200800322008003220039200391180201100991001008000010000111511800160020036800001002004020040200402004020040
8020420039155000000051258010810080008100800205006401320200200200392003999776999080120200800322008003220039200391180201100991001008000010000111511800160020036800001002004020040200402004020040
80204200391550051150094258010810080008100800205006401320200200200392003999776999080120200800322008003220039200391180201100991001008000010000111511800160020036800001002004020040200402004020040

1000 unrolls and 10 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)9fld unit uop (a6)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420039155126125800101080000108000050640000120020200392003999960310019800102080000208000020039200391180021109101080000100005020281619272003680000102004020040200402004020040
800242003915504025800101080000108000050640000120020200392003999960310019800102080000208000020039200391180021109101080000100105020271627272003680000102004020040200402004020040
8002420039155012825800101080000108000050640000120020200392003999960310019800102080000208000020039200391180021109101080000100005020261627142003680000102004020040200402004020040
800242003915506125800101080000108000050640000120020200392003999960310019800102080000208000020039200391180021109101080000100105020271630292003680000102004020040200402004020040
800242003915508425800101080000108000050640000120020200392003999967310019800102080000208000020039200391180021109101080000100005020201628262003680000102004020040200402004020040
800242003915504025800101080000108000050640000020020200392003999960310019800102080000208000020039200391180021109101080000100005020281613272003680000102004020040200402004020040
80024200391551214925800101080000108000050640000120020200392003999960310019800102080000208000020039200391180021109101080000100005020271627262003680000102004020040200402004020040
800242003915506325800101080000108000050640000020020200392003999960310019800102080000208000020039200391180021109101080000100005020271621272003680000102004020040200402004020040
800242003915504025800101080000108000050640000020020200392003999960310019800102080000208000020039200391180021109101080000100005020261627272003680000102004020040200402004020040
800242003915504025800101080000108000050640000120020200392003999960310019800102080000208000020039200391180021109101080000100005020261627272003680000102004020040200402004020040