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, 16B)

Test 1: uops

Code:

  sqneg v0.16b, v0.16b
  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)696d6emap 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
100430372333612547251000100010003981603018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037220612547251000100010003981603018303730372414328951000100010003037303711100110001073116112629100030383038303830383038
10043037220612547251000100010003981603054303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303723159612547251000100010003981603018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037230612547251000100010003981603018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037236612547251000100010003981603018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037220612547251000100010003981603018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303723432612547251000100010003981603018303730372414328951000100010003037303711100110000973116112629100030383038303830383038
10043037230612547251000100010003981603018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037226612547251000100010003981603018303730372414328951000100010003037303711100110000073116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  sqneg v0.16b, v0.16b
  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 tlb miss (a1)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0ea? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020430037225072629547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100043371011611296332100001003003830038300383003830038
102043003722506129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100051671011611296330100001003003830038300383003830038
102043003722506129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100046071011611296330100001003003830038300383003830038
102043003722508229547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100045371011611296330100001003003830038300383003830038
10204300372240612954725101001001000010010600500427716013001830037300372826932874510100200100002001000030037300371110201100991001001000010000281671011611296330100001003003830038300383003830038
102043003722506129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100046071011611296330100001003003830038300383003830038
102043003722506129547251010010010000100100005004277160030018300373003728264328745101002001000020010000300373003711102011009910010010000100052371011611296330100001003003830038300383003830038
102043003722506129547251010010010000100100005004277160130018300373003728264328745101002001000020010000300373003711102011009910010010000100045071011611296330100001003003830038300383003830038
102043003722506129547251010010010000100100005004277160130018300373008428264328745101002001000020010000300373003711102011009910010010000100043071011611296330100001003003830038300383003830038
102043003722506129547251010010010000100100005004282226130018300373003728264728781101002001000020010000300373003711102011009910010010000100018371011611296330100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03mmu table walk data (08)09l2 tlb miss data (0b)18191e1f3f4e51schedule 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)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024300372240000000612954725100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010000540606402162229629010000103003830038300383003830038
100243003722500000008229547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100002803606402162229629010000103003830038300383003830038
10024300372250000000726295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000000306402162229629010000103003830038300383003830038
10024300372250000000156295472510010101000010100005542771601300183003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
10024300372250000000612954725100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010000004806402162229629010000103003830038300383003830038
10024300372250000000822954725100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010000008106402162229629010000103003830038300383003830038
10024300372250000000612954725100101010000101000050427716013001830037300372828632876710010201000020100003003730037111002110910101000010000007806402162229629010000103003830038300383003830038
1002430037225000000061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000000306402162229629010000103003830038300383003830038
1002430037225000000061295472510010101000010100006642771601300183003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
100243003722500000006129547251001010100001010000504277160130018300373003728286328767100102010000201000030037300371110021109101010000100000018306402162229629010000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  sqneg v0.16b, v8.16b
  sqneg v1.16b, v8.16b
  sqneg v2.16b, v8.16b
  sqneg v3.16b, v8.16b
  sqneg v4.16b, v8.16b
  sqneg v5.16b, v8.16b
  sqneg v6.16b, v8.16b
  sqneg v7.16b, v8.16b
  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 data (08)09l2 tlb miss data (0b)18191e1f3f51schedule 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)ld unit uop (a6)l1d cache writeback (a8)a9acc2branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042006815000000003025801081008000810080020500640132020020200392003999776999080120200800322008003220039200391180201100991001008000010000000011151183161220036800001002004020040200402004020040
802042003915000000003025801081008000810080020500640132020020200392003999776999080120200800322008003220039200391180201100991001008000010000000011151181161220036800001002004020040200402004020040
802042003915000000003025801081008000810080020500640132020020200392003999776999080120200800322008003220039200391180201100991001008000010000000011151181162220036800001002004020040200402004020040
8020420039150000000030525801081008000810080020500640132020020200392003999776999080120200800322008003220039200391180201100991001008000010000000011151182162220036800001002004020040200402004020040
802042003915000000003025801081008000810080020500640132020020200392003999776999080120200800322008003220039200391180201100991001008000010000000011151182162220036800001002004020040200402004020040
802042003915000000003025801081008000810080020500640132020020200392003999776999080120200800322008003220039200391180201100991001008000010000003011151182162220036800001002004020040200402004020040
802042003915000000003025801081008000810080020500640132020020200392003999776999080120200800322008003220039200391180201100991001008000010000000011151182162220036800001002004020040200402004020040
802042003915000000003025801081008000810080020512640132020020200392003999776999080120200800322008003220039200391180201100991001008000010000000011151181161220036800001002004020040200402004020040
802042003915000000003025801081008000810080020500640132020020200392003999776999080120200800322008003220039200391180201100991001008000010000000011151182162220036800001002004020040200402004020040
8020420039150000000060025801081008000810080020500640132020020200392003999776999080120200800322008003220039200391180201100991001008000010000100011151181162220036800001002004020040200402004020040

1000 unrolls and 10 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)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
8002420051150100300258001010800001080000506400001200202003920039999631001980010208000020800002008820039118002110910108000010135020202917102007580000102004020040200402004020040
8002420039150008840258001010800001080000506400000200202003920039999631001980010208000020800002003920039118002110910108000010131415020171617172003680000102004020040200402004020040
8002420039150000402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000103235020171617172003680000102004020040200402004020040
80024200391500004025800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000502071617172003680000102004020040200402004020040
80024200391500004025800101080000108000050640000020020200392003999963100198001020800002080000200392003911800211091010800001000502017166172003680000102004020040200402004020040
8002420039150000402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100050205161662003680000102004020040200402004020040
8002420039150000402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000100050206166172003680000102004020040200402004020040
8002420039150000402580010108000010800005064000002002020039200399996310019800102080000208000020039200391180021109101080000106965020161617172003680000102004020040200402004020040
80024200391500004025800101080000108000050640000120020200392003999963100198001020800002080000200392003911800211091010800001000502014167172003680000102004020040200402004020040
800242003915000040258001010800001080000506400001200202003920039999631001980010208000020800002003920039118002110910108000010303502017166172003680000102004020040200402004020040