Apple M1 Microarchitecture Research by Dougall Johnson

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

FRINT64X (vector, 4S)

Test 1: uops

Code:

  frint64x v0.4s, v0.4s
  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)0318191e3f4e51inst 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
10043037230006125472510001000100039816013018303730372414328951000100010003037303711100110000073216112629100030383038303830383038
10043037240006125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037240006125472510001000100039816003018303730372414328951150100010003037303711100110000073116112629100030383038303830383038
10043037240006125472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037230006125472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037240006125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372400126125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037240006125472510001000100039816003018303730372414328951150100010003037303711100110000073116112629100030383038303830383038
10043037230006125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037240006125472510001000100039816013018303730372414328951000100010003037303711100110001073116112629100030383086303830383038

Test 2: Latency 1->2

Code:

  frint64x v0.4s, v0.4s
  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)0308090b0f18191e1f3a3f4e51inst 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)60696b6d6edispatch 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)9fa0a1a8a9accfd0d5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
102043003723200000000027329547251010010010000100101505004277160030018030037300372826432874510100200100002001000030037300371110201100991001001000010000000710011611296330100001003003830038300383003830038
10204300372320000000006129547251010010010000100100005004277160030018030037300372826432874510100200100002001000030037300371110201100991001001000010000100710011611296330100001003003830038300383003830038
10204300372330000000006129547251010010010000100100005004277160130018030037300372826432874510100200100002001000030037300371110201100991001001000010000000710011611296330100001003003830038300383003830038
10204300372330000000008429547251010010010000100100005004277160030018030037300372826432874510100200100002001000030037300371110201100991001001000010000000710011611296330100001003003830038300383003830038
102043003723300000000014729547251010010010000100100005004277160030018030037300372826432874510100200100002001000030037300371110201100991001001000010000000710011611296330100001003008430038300383003830038
102043003723300000000092229547251010010010000100100005004277160130018030037300372826432874510100200100002001000030037300371110201100991001001000010000100710011611296330100001003003830038300383003830038
1020430037233000000000180829547251010010010000100100005004277160030018030037300372826432874510100200100002001000030037300371110201100991001001000010000100710011611296330100001003003830038300383003830038
102043003723300000012008801852129466212102321521008815511650740429200313037803051330561283015128940118002381177623211653305143056311110201100991001001000010024143042395813118223008939100001003051930565305643056330565
10204305162360010910118879206622294741931022014710072146112007784290680130342030549304182829752288961149723011488228113253054830464911020110099100100100001002002161059050282212980823100001003003830038300383003830038
1020430037233110067795880021529547251010010010000100100005004277160030018030037300372826432874510100200100002001000030037300841110201100991001001000010000000710011611296330100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire (01)cycle (02)030918191e3f4e51inst 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)9fa1a8acbranch mispredict (cb)cfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
100243008522512206129547251001810100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000640316332962910000103003830038300383003830038
100243003722500006129547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000640316332962910000103003830038300383003830038
100243003722500006129547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000640316332962910000103003830038300383003830038
100243003722500001451295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000120640316332962910000103003830038300383003830038
100243003722400006129547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000640316332962910000103003830038300383003830038
1002430037225000971329547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000640316332962910000103003830038300383003830038
1002430037225000088129547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000640316332962910000103003830038300383003830038
1002430037225000090229547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000640316332962910000103003830038300383003830038
1002430037225000083729547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000640316332962910000103003830038300383003830038
1002430037225000014729547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100300640316332962910000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  frint64x v0.4s, v8.4s
  frint64x v1.4s, v8.4s
  frint64x v2.4s, v8.4s
  frint64x v3.4s, v8.4s
  frint64x v4.4s, v8.4s
  frint64x v5.4s, v8.4s
  frint64x v6.4s, v8.4s
  frint64x v7.4s, v8.4s
  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)031e3f5051inst 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)9fa8a9c5branch mispredict (cb)cdcfd6e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
80204200391550304258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040
80204200391560300258010810080008100800205006401322002020039200399977699908012020080032200800322024720039118020110099100100800001001011151181620036800001002004020040200402004020040
80204200391550300258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040
802042003915584590258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040
80204200391550300258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040
80204200391550300258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040
80204200391550300258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040
80204200391550300258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040
80204200391550300258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040
80204200391550300258010810080008100800205006401322002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181620036800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire (01)cycle (02)031e1f3f51inst 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)9fa1accfd0d2icache miss (d3)itlb miss (d4)d5d6ddinst fetch restart (de)e0ea? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
8002420051161004025800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000502000007169520036080000102004020040200402004020040
80024200391550040258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010005020000061611620036080000102004020040200402004020040
80024200391550040258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010005020000081610520036080000102004020040200402004020040
80024200391550040258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010005020000071641020036080000102004020040200402004020040
8002420039155004025800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000502000006166520036080000102004020040200402004020040
8002420039155004025800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000502000003163520036080000102004020040200402004020040
80024200391550013525800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000502000014165520036080000102004020040200402004020040
80024200391560040258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010005020000012165620036080000102004020040200402004020040
80024200391550040258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010005020000011165620036080000102004020040200402004020040
80024200391500040258009410800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010005020000041641020036080000102004020040200402004020040