Apple M1 Microarchitecture Research by Dougall Johnson

Firestorm: Overview | Base Instructions | SIMD and FP Instructions
Icestorm:  Overview | Base Instructions | SIMD and FP Instructions

FRINTZ (vector, 2S)

Test 1: uops

Code:

  frintz 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 (01)cycle (02)03071e3f4e51inst issue (52)~issue fp/simd (54)~dispatch fp/simd (57)huge thing fp/simd (5b)60696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op fp/simd (7e)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst neon or fp (9a)a8accfd5d6ddinst fetch restart (de)e0? fp/simd (ee)f5f6f7f8fd
1004303722006125472510001000100039816013018303730372414328951000100010003037303711100110001373216332629100030383038303830383038
10043037230126125472510001000100039816013018303730372414328951000100010003037303711100110000073316222629100030383038303830383038
1004303723006125472510001000100039816013018303730372414328951000100010003037303711100110000373316332629100030383038303830383038
1004303723106125472510001000100039816013018303730372414328951000100010003037303711100110001073316332629100030383038303830383038
10043037230012625472510001000100039816013018303730372414328951000100010003037303711100110000073316332629100030383038303830383038
100430372301212625472510001000100039816013018303730372414328951000100010003037303711100110000373316332629100030383038303830383038
1004303722008225472510001000100039816013018303730372414328951000100010003037303711100110001073316332629100030743038303830383038
10043037220010325472510001000100039816013018303730372414328951000100010003037303711100110001073316332629100030383038303830383038
1004303723008425472510001000100039816013018303730372414328951000100010003037303711100110001073316332629100030383038303830383038
1004303722008425472510001000100039816013018303730372414328951000100010003037303711100110000073316332629100030383038303830383038

Test 2: Latency 1->2

Code:

  frintz 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 (01)cycle (02)030818191e3f4e51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)6061696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa8accfd0d5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
102043003722400001032954725101001001000010010000500427716010300183003730037282643287451010020010000200100003003730037111020110099100100100001001371041161129633100001003003830038300383003830038
102043003722500001032954725101001001000010010000500427716014300183003730037282643287451010020010000200100003003730037111020110099100100100001001071041161129633100001003003830038300383003830038
1020430037225000122932954725101001001000010010000500427716004300183003730037282643287451010020010000200100003003730037111020110099100100100001000371041161129633100001003003830038300383003830038
102043003722500001032954725101001001000010010000500427716004300183003730037282643287451010020010000200100003003730037111020110099100100100001001371041161129633100001003003830038300383003830038
1020430037225000121032954725101001001000010010000500427716014300183003730037282643287451010020010000200100003003730037111020110099100100100001001371001161129633100001003003830038300383003830038
10204300372250000612954725101001001000010010000500427716010300183003730037282643287451010020010000200100003003730037111020110099100100100001001371001161129633100001003003830038300383003830038
102043003722500001032954725101001001000810010000500427716004300183003730037282643287451010020010000200100003003730037111020110099100100100001001371041161129633100001003003830038300383003830038
1020430085225000181452954725101001001000010010000500427716004300183003730037282643287451010020010000200100003003730037111020110099100100100001001671003161129633100001003003830038300383003830038
10204300372250007951452954725101001001000010010000500427812900300183003730037282643287451010020010000200101653003730037111020110099100100100001002671001161129633100001003003830038300383003830038
102043003723300001032954725101001001000010010000500427716000300183003730037282643287451010020010000200100003003730037111020110099100100100001000371001161129633100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire (01)cycle (02)030b1e3a3f4e51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa0a1a8acc2cfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
100243003722400254129547251001010100001010000504277160300183003730037282863287671001020100002010000300373003711100211091010100001000000644111611112962910000103003830038300383003830038
10024300372250026629547251001010100001010000504277160300183003730037282863287671001020100002010000300373003711100211091010100001000000644124111112962910000103003830038300383003830038
10024300372250027662954725100101010000101000050427716030018300373003728286328767100102010000201000030037300371110021109101010000100000064411161162962910000103003830038300383003830038
10024300372250026629547251001010100001010000504277160300183003730037282863287671001020100002010000300373003711100211091010100001000000644111611112962910000103003830038300383003830038
10024300372250026629547251001010100001010000504277160300183003730037282863287671001020100002010000300373003711100211091010100001000000644121611112962910000103003830038300383003830038
1002430037225012210829547251001010100001010000504277160300183003730037282863287671001020100002010000300373003711100211091010100001000000644111611112962910000103003830038300383003830038
1002430037225002662954725100101010000101000050427716030018300373003728286328767100102010000201000030037300371110021109101010000100010064412161162962910000103013230085300383003830038
10024300372250122662954725100101010008101000050427716030018300373003728286328767100102010000201000030037300371110021109101010000100000064411161162962910000103003830038300383003830038
10024300372250926629547251001010100001010000504278512300183003730037282863287671001020100002010000300373003711100211091010100001000127780644121611112962910000103003830038300383003830038
10024300372250026629547251001010100001010000504277160300183003730037282863287671001020100002010000300373003711100211091010100001000000644111611112962910000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  frintz v0.2s, v8.2s
  frintz v1.2s, v8.2s
  frintz v2.2s, v8.2s
  frintz v3.2s, v8.2s
  frintz v4.2s, v8.2s
  frintz v5.2s, v8.2s
  frintz v6.2s, v8.2s
  frintz 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 (01)cycle (02)030b18191e1f3f51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa8acc2c5branch mispredict (cb)cdcfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
802042003915500000197258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001004234011151181161020089800001002004020040200402004020040
802042003915505000722580108100800081008002050064013220020200392003999776999080120200800322008003220039200391180201100991001008000010000011151180160020036800001002004020040200402004020040
8020420039150001120722580108100800081008002050064013220153200392003999776999080120200800322008003220039200391180201100991001008000010010011151180160020036800001002004020040200402004020040
8020420039156000120722580108100800081008002050064013220020200392003999776999080120200800322008003220039200391180201100991001008000010013011151180160020036800001002004020040200402004020040
80204200391550001202922580108100801081008002050064013220020200392003999776999080120200800322008003220039200911180201100991001008000010003011151180160020036800001002004020040200402009420040
802042003915600012072925801081008000810080020500640132200202003920255997769990801202008056420080032200392003911802011009910010080000100312411151180160020036800001002004020040200402024120040
802042014115500040802872580108100800081008002050064013220020200392003999776999080120200800322008003220039200391180201100991001008000010016011151180160220036800001002004020040200402004020040
8020420039166100435887225801081008000810080020500640132200202003920039997769990801202008003220080032200392003911802011009910010080000100081011151180160020036800001002004020040200402004020040
80204200391500000030258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000102011151180160020036800001002004020040200402004020040
8020420039150000003025801081008000810080020500640132200202003920039997769990801202008003220080032200392003911802011009910010080000100090011151180160020036800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire (01)cycle (02)0318191e3f51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)60696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa0a1a6a8accfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
8002420051150001282258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010000035020316332003680000102004020040200402004020040
8002420039150001282258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010000135020416442003680000102004020040200402004020040
80024200391500012682258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010000135020316342003680000102004020040200402004020040
8002420039150001261258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010000005020416452003680000102004020040200402004020040
80024200391500026182258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010000135020516532003680000102004020040200402004020040
8002420039150001282258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010000135020316242003680000102004020040200402004020040
8002420039150001282258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010000135020416442003680000102004020040200402004020040
8002420039150001240258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010000135020516442003680000102004020040200402004020040
8002420039150001282258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010000135020616532003680000102004020040200402004020040
8002420039150001261258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010000135020416542003680000102004020040200402004020040