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

SQABS (vector, 4H)

Test 1: uops

Code:

  sqabs 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)031e3f4e51schedule 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 cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100430372306125472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372206125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816013018303730372414328951000116310003037303711100110000073116112629100030383038303830383038
100430372206125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372268425472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303722025125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303723014725472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372206125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  sqabs 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)03l2 tlb miss data (0b)181e3a3f4e51schedule 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)6061696d6emap 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 mispred nonspec (cb)cfd0d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204300372250000612954725101001001000010010000500427716019300183003730037282643287451010020010000200100003003730037111020110099100100100001000000710011611296330100001003003830038300383003830038
10204300372250000612954725101001001000010010000500427716010300183003730037282643287451010020010000200100003003730037111020110099100100100001000000710011611296330100001003003830038300383003830038
10204300372250000612954725101001001000010010000500427716010300183003730037282643287451010020010000200100003003730037111020110099100100100001000000710011611296330100001003003830038300383003830038
10204300372250000612954725101001001000010010000500427716000300183003730037282643287451010020010000200100003003730037111020110099100100100001000000710011611296330100001003003830038300383003830038
10204300372250000612954725101001001000010010000500427716010300543003730037282643287451010020010000200100003003730037111020110099100100100001000000710011611296330100001003003830038300383003830038
10204300372250000612954725101001001000010010000500427716000300183003730037282643287451010020010000200100003003730037111020110099100100100001000000710911611296330100001003003830038300383003830038
10204300372250000612954725101001001000010010000500427716009300183003730037282643287451010020010000200100003003730037111020110099100100100001000000710011611296330100001003003830038300383003830038
10204300372250000612954725101001001000010010000500427716010300183003730037282643287451010020010000200100003003730037111020110099100100100001000000710911611296330100001003003830038300383003830038
10204300372250000612954725101001001000010010000500427716010300183003730037282643287451010020010000200100003003730037111020110099100100100001000000710011611296330100001003003830038300383003830038
10204300372250000612954725101001001000010010000500427716000300183003730037282643287451010020010000200100003003730037111020110099100100100001000000710911611296330100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03mmu table walk instruction (07)09l2 tlb miss instruction (0a)l2 tlb miss data (0b)18191e1f3f4e5051schedule 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)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002430037225000000006129547025100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038
1002430037225100000006129547025100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038
10024300372250000000070629547025100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038
1002430037224000000006129547025100101010000101000050427716003001830037302142828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038
1002430037225000000006129547025100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000006422163429631010000103003830038300383003830038
1002430037225000000006129547025100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038
1002430037225000000006129547025100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038
1002430037224100000006129547025100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000006422162229629010000103003830038300383003830038
1002430037225000000006129547025100101010000101000050427716003001830215300372828632876710012201000020100003003730037111002110910101000010000000006401162229629010000103003830038300383003830038
1002430037225000000006129547025100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010000000006402162229629010000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  sqabs v0.4h, v8.4h
  sqabs v1.4h, v8.4h
  sqabs v2.4h, v8.4h
  sqabs v3.4h, v8.4h
  sqabs v4.4h, v8.4h
  sqabs v5.4h, v8.4h
  sqabs v6.4h, v8.4h
  sqabs 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)03191e3f51schedule 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)696d6emap 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)a9acc2branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfmap dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420060150003025801081008000810080020500640132200202003920039997769990801202008003220080032200392003911802011009910010080000100000001115118160020115800001002004020040200402004020040
8020420039150007225801081008000810080020500640132200202003920039997769990801202008003220080032200392003911802011009910010080000100010001115118160020112800001002004020040200402004020040
8020420039150003025801081008000810080020500640132200202024120039997769990801202008003220080032200392003911802011009910010080000100070301115118160020036800001002004020040200402004020040
8020420039150003025801081008000810080020500640132200202003920039997769990801202008003220080032200392003911802011009910010080000100050013801115118160020036800001002004020040200402004020040
8020420039150003025801081008000810080020500640132200202003920039997769990801202008003220080032200392003911802011009910010080000100030001115118160020036800001002004020040200402004020040
802042003915000302580108100800081008002050064013220020200392003999776999080120200800322008003220039200391180201100991001008000010004307501115118160020036800001002004020040200402004020040
80204200391500030101801081008000810080020500640132200202003920039997769990801202008003220080032200392003911802011009910010080000100041015301115118370020036800001002004020040200402004020040
8020420039150003025801081008000810080020500640132200202003920039997769990801202008003220080032200392003911802011009910010080000100046015901115118160020036800001002004020040200402004020040
802042003915000125258010810080008100801165006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000340001115118160020036800001002004020040200402004020040
80204200391500029325801081008000810080020511640972200202003920039997769990801202008003220080140200392003911802011009910010080000100041261801115118160020036800001002009020040201132009020040

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)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)accdcfl1i cache miss demand (d3)d5map dispatch bubble (d6)daddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420039150040258001010800001080419506400001200202003920039999631001980010208000020800002003920039118002110910108000010100502001160112003680000102004020040200402004020040
80024200391500402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000103530502001160112003680000102004020040200402004020040
80024200391500402580010108000010800005064000012002020047200399996310019800102080000208000020039200391180021109101080000101120502001160112008380000102004020040200402004020040
8002420039150040258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010000502001160112003680000102004020040200402004020040
8002420039150040258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010100502001160112003680000102004020040200402004020040
800242003915004025800101080000108000050640000120020200392003999963100198001020800002080000200392003911800211091010800001001530502001160112003680000102004020040200402004020040
8002420039150040258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010190502001160112003680000102004020040200402004020040
8002420039150040258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010100502001160112003680000102004020040200402004020040
80024200391500402580010108000010800005064000012002020039200399996310019800102080000208000020039200391180021109101080000104600502001160112003680000102004020040200402004020040
8002420039150040258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010000502001160112003680000102004020090200402004020040