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

SQNEG (vector, 2S)

Test 1: uops

Code:

  sqneg 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 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 tlb access (a0)l1d cache writeback (a8)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100430372306125472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372206125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816003018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303723010525472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372206125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
100430372306125472510001000100039816013018303730372414328951000100010003037303711100110000073116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  sqneg 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 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
102043003722506129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
102043003722506129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830085300383003830038
102043003722406129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
102043003722506129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
102043003722506129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
102043003722406129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
102043003722506129547251010010010000100100005004277160030018300853003728264328745101002001000020010000300373003711102011009910010010000100007101160129633100001003003830038300383003830038
102043003722506129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
102043003722506129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
102043003722506129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100007101161129633100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03mmu table walk data (08)0918191e1f3f4e51schedule 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 access (a0)l1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)a9acc2branch cond mispred nonspec (c5)cfl1i cache miss demand (d3)d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
100243003722500000061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000000064002162229629010000103003830038300383003830038
1002430037225000000441295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000000064002162229629010000103003830038300383003830038
100243003722500000061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000000064002162229629010000103003830038300383003830038
100243003722500000061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000000064002162229629010000103003830038300383003830038
100243003722500000061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000000064002162229629010000103003830038300383003830038
100243003722500000061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000000064002162229629010000103003830038300383003830038
100243003722500000061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000000064002162229629010000103003830038300383003830038
100243003722500000061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000000064002162229629010000103003830038300383003830038
100243003722500000061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000000064002162229629010000103003830038300383003830038
100243003722500000061295472510010101000010100005042771600300180300373003728286328767100102010000201000030037300371110021109101010000100000000064002162229629010000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  sqneg v0.2s, v8.2s
  sqneg v1.2s, v8.2s
  sqneg v2.2s, v8.2s
  sqneg v3.2s, v8.2s
  sqneg v4.2s, v8.2s
  sqneg v5.2s, v8.2s
  sqneg v6.2s, v8.2s
  sqneg 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 uop (01)cycle (02)03l2 tlb miss data (0b)1e1f3f51schedule 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)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)9fl1d cache writeback (a8)acc2branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200391500003025801081008000810080020500640132200202003920039997706999080120200800322008003220039200391180201100991001008000010000011151181160020036800001002004020040200402004020201
80204200391520013230258010810080008100800205006401322007020039200399977069990802282008003220080032200392003911802011009910010080000100001111151180160020036800001002004020040200402004020040
802042003915006030258010810080008100800205006401322002020039200399977069990801202008003220080032200392003911802011009910010080000100078011151180160020036800001002004020040200402004020040
80204200391500003025801081008000810080020500640132200202003920039997776999080120200800322008003220039200391180201100991001008000010000011151180160020036800001002004020040200402004020040
80204200391500003025801081008000810080020500640132200202003920039997706999080120200800322008003220039200391180201100991001008000010000011151180160020036800001002004020040200402004020040
80204200391500003025801081008000810080020500640132200202003920039997706999080120200800322008003220039200391180201100991001008000010000011151180160020036800001002004020040200402004020040
80204200391500003025801081008000810080020500640132200202003920039997706999080120200800322008003220039200391180201100991001008000010000011151180160020036800001002004020040200402004020040
802042003915000069525801081008000810080020500640132200202003920039997706999080120200800322008003220039200391180201100991001008000010026011151180160020036800001002004020040200402004020040
80204200391500003025801081008000810080020500640132200202003920039997706999080120200800322008003220039200391180201100991001008000010010011151180160020036800001002004020040200402004020040
80204200391500003025801081008000810080020500640132200202003920039997706999080120200800322008003220039200391180201100991001008000010010011151180160020036800001002004020040200402004020040

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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420051150040258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010005020716782003680000102004020040200402004020040
8002420039150040258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010005020616672003680000102004020040200402004020040
8002420039150040258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010035020616882003680000102004020040200402004020040
800242003915026440258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010005020716552003680000102004020040200402004020040
800242003915038440258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010005020816782003680000102004020040200402004020040
8002420039150040258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010005020716562003680000102004020040200402004020040
8002420039150040258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010005020716882003680000102004020040200402004020040
8002420039150040258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010005020716662003680000102004020040200402004020040
8002420039150040258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010005020816672003680000102004020040200402004020040
800242003915035440258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010005020716662003680000102004020040200402004020040