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

ABS (vector, 4S)

Test 1: uops

Code:

  abs 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 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
100430372206125472510001000100039816003018303730372414328951000100010003037303711100110000973216222629100030383038303830383038
100430372206125472510001000100039816003018303730372418328951000100010003037303711100110000073216222629100030383038303830383038
100430372306125472510001000100039816003018303730372414328951000100010003037303711100110000073216222629100030383038303830383038
1004303722876125472510001000100039816003018303730372414328951000100010003037303711100110000073216222629100030383038303830383038
100430372306125472510001000100039816003018303730372414328951000100010003037303711100110000073216222629100030383038303830383038
100430372306125472510001000100039816003018303730372414328951000100010003037303711100110001073216222629100030383038303830383038
100430372306125472510001000100039816003018303730372414328951000100010003037303711100110000073216222629100030383038303830383038
10043037221236125472510001000100039816003018303730372414328951000100010003037303711100110000073216222629100030383038303830383038
100430372306125472510001000100039816003018303730372414328951000100010003037303711100110000073216222629100030383038303830383038
100430372406125472510001000100039816013018303730372414328951000100010003037303711100110000073216222629100030383038303830383038

Test 2: Latency 1->2

Code:

  abs 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 uop (01)cycle (02)031e1f3f4e51schedule 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 cache writeback (a8)c2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102043003722500612954725101001001000010010000500427716030018300373003728264328745107262001000020010000300373003711102011009910010010000100007103161129633100001003003830038300383003830038
1020430037225120612954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100107101161129633100001003003830038300383003830038
102043003722500612954725101001001002410010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
1020430037225240612954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
1020430037225330612954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
10204300372253306129547251010010010000100100005004277160300183003730037282641928745101002001000020010000300373003711102011009910010010000100007101161129704100001003003830038300383003830038
102043003722500612954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
102043003722560612954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
10204300372251650612954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
102043003722560612954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)031e3f4e51schedule 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? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002430037225061295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000640416222962910000103003830038300383003830038
10024300372250612954725100101010000101000050427716003001830037300372828632876710010201000020100003003730037111002110910101000010250640216222962910000103003830038300383003830038
1002430037225061295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001010640216222962910000103003830038300383003830038
1002430037225084295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001010640216222962910000103003830038300383003830038
1002430037225094295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001020640216222962910000103003830038300383003830038
1002430037225061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001010640216222962910000103003830038300383003830038
1002430037225061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001010640216222962910000103003830038300383003830038
1002430037225061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001010640216222962910000103003830038300383003830038
1002430037225061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001010640216222962910000103003830038300383003830038
10024300372240612954725100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010293640216222962910000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  abs v0.4s, v8.4s
  abs v1.4s, v8.4s
  abs v2.4s, v8.4s
  abs v3.4s, v8.4s
  abs v4.4s, v8.4s
  abs v5.4s, v8.4s
  abs v6.4s, v8.4s
  abs 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 uop (01)cycle (02)03mmu table walk instruction (07)mmu table walk data (08)191e3f51schedule 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? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200611500000302580108100800081008002050064013212002020039200399977699908012020080032200800322003920039118020110099100100800001000011151181160020036800001002004020040200402004020040
80204200391500000302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001001011151180160020036800001002004020040200402004020040
8020420039150000038102580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
80204200391500000302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
80204200391500000302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
80204200391500000302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001001011151180160020036800001002004020040200402004020040
80204200391500000302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000011151180170020036800001002004020040200402004020040
80204200391500000302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
80204200391500000302580108100800081008002050064013202002020039200399977699908012020080032200800322003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
802042003915000003025801081008000810080020500640132020020200392003999776999080120200800322008003220039200391180201100991001008000010018011151180160020036800001002004020040200402004020040

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)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 cache writeback (a8)accdcfd5map dispatch bubble (d6)ddfetch restart (de)e0ea? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200391500402580010108000010800005064000020020200392003999963100198001020800002080000200392003911800211091010800001006050202416242220036080000102004020040200412004020040
80024200391500402580010108000010800005064000020020200392003999963100198001020800002080000200392003911800211091010800001000050202516252520036080000102004020040200412004020040
80024200391500402580010108000010800005064000020020200392003999963100198001020800002080000200392003911800211091010800001016050202516242420036080000102004020040200522004020040
800242003915021822580010108000010800005064000020020200392003999963100198001020800002080000200392003911800211091010800001003050202616152620036080000102004020040200522004020040
80024200391500402580010108000010800005064000020020200392003999963100198001020800002080000200392003911800211091010800001006050202516252620036080000102004020040200412004020040
80024200391500402580010108000010800005064000020020200392003999963100198001020800002080000200392003911800211091010800001000050202716252520036080000102004020040200522004020040
80024200391500402580010108000010800005064000020020200392003999963100198001020800002080000200392003911800211091010800001019050202416252420036080000102004020040200412004020040
80024200391500402580010108000010800005064000020020200392003999963100198001020800002080000200392003911800211091010800001000050202316262420036080000102004020040200412004020040
80024200391500402580010108000010800005064000020020200392003999963100198001020800002080000200392003911800211091010800001000050202516202520036080000102004020040200412004020040
80024200391500402580010108000010800005064000020020200392003999963100198001020800002080000200392003911800211091010800001016050202516152520036080000102004020040200522004020040