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

SQDMULH (by element, 4H)

Test 1: uops

Code:

  sqdmulh v0.4h, v0.4h, v1.h[1]
  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
1004303722126125482510001000100039831313018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372206125392510001000100039831313018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372206125482510001000100039831313018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372206125482510001000100039831313018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372206125482510001000100039831313018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372306125482510001000100039831313018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372206125482510001000100039831313018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372306125482510001000100039831313018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372306125482510001000100039831303018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372306125482510001000100039831303018303730372415328951000100020003037303711100110001073116112630100030383038303830383038

Test 2: Latency 1->2

Code:

  sqdmulh v0.4h, v0.4h, v1.h[1]
  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)033f4e51schedule 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
10204300372256129548251010010010000100100005004277313130018300373003728265328745101002001000020020000300373003711102011009910010010000100007101161129634100001003003830038300383003830038
10204300372256129548251010010010000100100005004277313130018300373003728265328745101002001000020220000300373003711102011009910010010000100007101161129634100001003003830038300383003830038
10204300372256129548251010010010000100100005004277313130018300373003728265328745101002001000020020000300373003711102011009910010010000100007101161129634100001003003830038300383003830038
10204300372246129548251010010010000100100005004277313130018300373003728265328745101002001000020020000300373003711102011009910010010000100007101161129634100001003003830038300383003830038
10204300372256129548251010010010000100100005004277313130018300373003728265328745101002001000020020000300373003711102011009910010010000100007101161129634100001003003830038300383003830038
10204300372256129548251010010010000100100005004277313030018300373003728265328745101002001000020020000300373003711102011009910010010000100007101161129634100001003003830038300383003830038
10204300372256129548251010010010000100100005004277313130018300373003728265328745101002001000020020000300373003711102011009910010010000100007101161129634100001003003830038300383003830038
10204300372256129548251010010010000100100005004277313130018300373003728265328745101002001000020020000300373003711102011009910010010000100007101161129634100001003003830038300383003830038
10204300372256129548251010010010000100100005004277313130018300373003728265328745101002001000020020000300373003711102011009910010010000100007101161129634100001003003830038300383003830038
10204300372256129548251010010010000100100005004277313130018300373003728265328745101002001000020420000300373003711102011009910010010000100007101161129634100001003003830038300383003830038

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)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)st unit uop (a7)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002430037224000000726295482510010101000010100005042773131300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
100243003722500000061295482510010101000010100005042773131301263003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
100243003722500000061295482510010101000010100005042773131300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
100243003722500009061295482510010101000010100005042773131300183003730037282873287671001020100002020000300373003711100211091010100001000000007943322229774110000103041730413304563041730180
1002430415228009810687045159294761971007915100641511192814288169130306304563041928317382891711172201131424226343046030461311002110910101000010230122214306402162229630010000103017830038300383007930038
1002430037225018893661640212947617710088161004013111927642881691303063041630402283013928915113562211317222228430417301791211002110910101000010522002373308163483329882210000103046630491304643041730416
10024304632280191000612954825100611010024101000050427731313041430416303242831714288791120620112222222290305143046510110021109101010000100010225658283741112229982310000103046430468305113056030464
1002430225229119413238805249295482510010101000010100005042773131300183003730037282873028767100102410979202000030037300371110021109101010000100000016640288431132229630010000103007430322301803003830321
1002430414236005103995283342954864100541210016141137471429088313023430179304162832316289171102420108302222626303203037171100211091010100001024012006682162229630010000103003830038300383003830038
100243003722500000061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038

Test 3: Latency 1->3

Code:

  sqdmulh v0.4h, v1.4h, v0.h[1]
  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)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)9fld unit uop (a6)l1d cache writeback (a8)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204300372250612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100000071011611296340100001003003830038300383003830038
10204300372250612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100000071011611296340100001003003830038300383003830038
10204300372250612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100000071011611296340100001003003830038300383003830038
10204300372250612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100000071011611296340100001003003830038300383003830038
10204300372253612954825101001001000010010000500427867030054300373003728265328745101002001000020020000300373003711102011009910010010000100000071011611296340100001003003830038300383003830038
102043003722506129548251010010010000100100005004277313300183003730037282653287451010020010000200200003003730037111020110099100100100001000054071011611296340100001003003830038300383003830038
10204300372250612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100060071011611296340100001003003830038300383003830038
10204300372250612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100000071011611296340100001003003830038300383003830038
10204300372250612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100000071011611296340100001003003830038300383003830038
10204300372240612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100000071011611296340100001003003830038300383003830038

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)696b6d6emap 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)9fld unit uop (a6)l1d cache writeback (a8)accfd2d5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
100243003722506129548251001010100001010000504277313300180300373003728287328767100102010000202000030037300371110021109101010000100006400216222963010000103003830038300383003830038
100243003722506129548251001010100001010000504277313300180300373003728287328767100102010000202000030037300371110021109101010000100006400216222963010000103003830038300383003830038
100243003722506129548251001010100001010000504277313300183300373003728287328767100102010000202000030037300371110021109101010000100006400216222963010000103003830038300383003830038
100243003722406129548251001010100001010000504277313300180300373003728287328767100102010000202000030037300832110021109101010000100006400216222963010000103003830038300383003830038
1002430037225025129548251001010100001010000504277313300180300373003728287328767100102010000202000030037300371110021109101010000100006400216222963010000103003830038300383003830038
100243003722506129548251001010100001010000504277313300180300373003728287328767100102010000202000030037300371110021109101010000100066400216222963010000103003830038300383003830038
100243003722508229548251001010100001010000504277313300180300373003728287328767100102010000202000030037300371110021109101010000100006400216222963010000103003830038300383003830038
100243003722506129548251001810100001010000504277313300180300373003728287328767100102010000202000030037300371110021109101010000100106400216222963010000103003830038300383003830038
100243003722506129548251001010100001010149504277313300180300373003728287328767100102010000202000030037300371110021109101010000100006400216222963010000103003830038300383003830038
10024300372320103295482510010101000010104477642881693045003060330370283163529013112082611793242264230699304181011002110910101000010202507064045216222963010000103003830038300383003830038

Test 4: throughput

Count: 8

Code:

  sqdmulh v0.4h, v8.4h, v9.h[1]
  sqdmulh v1.4h, v8.4h, v9.h[1]
  sqdmulh v2.4h, v8.4h, v9.h[1]
  sqdmulh v3.4h, v8.4h, v9.h[1]
  sqdmulh v4.4h, v8.4h, v9.h[1]
  sqdmulh v5.4h, v8.4h, v9.h[1]
  sqdmulh v6.4h, v8.4h, v9.h[1]
  sqdmulh v7.4h, v8.4h, v9.h[1]
  movi v8.16b, 9
  movi v9.16b, 10

(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)l2 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 tlb access (a0)l1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)a9acbranch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042005715000004125801001258000010080000500640000120020200392003999733999780100200800002001600002003920039118020110099100100800001000000000511021611200360800001002004020040200402004020040
8020420039150000041258010010080000100800005006400001201492003920039997339997801002008000020016000020039200391180201100991001008000010000038000511011611200360800001002004020040200402004020040
80204200391500015904125801001008000010080000500640000020020200392003999733999780100200800002001600002003920039118020110099100100800001000000000511011611200360800001002004020040200402004020040
802042003915000004125801001008000010080000500640000120020200392003999733999780100200800002001600002003920039118020110099100100800001000004301200511011611200360800001002004020040200402004020040
802042003915000004125801001008000010080000500640000020020200392003999733999780100200800002001604102009220039118020110099100100800001000000000511011611200360800001002004020040200402004020040
802042003915100004125801001008000010080000500640000120020200392003999733999780100200800002001600002003920039118020110099100100800001000000000511011611200360800001002004020040201992004020040
802042003915000004125801001008000010080000500640000020020200392003999733999780100200800002001600002003920039118020110099100100800001000000000511011611200369800001002004020040200402004020040
802042003915100004125801001008000010080000500640000020020200392003999733999780100200800002001600002003920039118020110099100100800001000000000511011612200360800001002004020247200402004020040
8020420039150000062258010010080000100800005006400001200202003920039997339997801002008000020016000020039200391180201100991001008000010000049000511011611200360800001002004020040200402004020040
802042003915000004125801001008000010080000500640000020020200392003999733999780100200800002001600002003920039118020110099100100800001000004901740511011611200360800001002004020040200402004020040

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
80024200501500402580010108000010800005064000012002020039200399996310019800102080000201600002003920039118002110910108000010005020216112003680000102004020040200402004020040
800242003915004025800101080000108000050640000120020200392003999963100198001020800002016000020039200391180021109101080000100185020116112003680000102004020040200402004020040
800242003915004025800101080000108000050640000120020200392003999963100198001020800002016000020039200391180021109101080000100155020116112003680000102004020040200402004020040
800242003915004025800101080000108000050640000120020200392003999963100198001020800002016000020039200391180021109101080000100185020116112003680000102004020040200402004020040
800242003915004025800101080000108000050640000120020200392003999963100198001020800002016000020039200391180021109101080000100785020116112003680000102004020040200402004020040
8002420039150040258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001001805020116112003680000102004020040200402004020040
8002420039151042025800101080000108000050640000120020200392003999963100198001020800002016000020039200391180021109101080000100155020116112003680000102004020040200402004020040
8002420039150040258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001001145020116112003680000102004020040200402004020040
80024200391500402580010108000010800005064000012002020039200399996310019800102080000201600002003920039118002110910108000010005020116112003680000102004020040200402004020040
80024200391506402580010108000010800005064000012002020039200399996310019800102080000201600002003920039118002110910108000010005020116112003680000102004020040200402004020040