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, 4S)

Test 1: uops

Code:

  sqdmulh v0.4s, v0.4s, v1.s[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)03181e3f4e51schedule 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 tlb access (a0)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
10043037220061254825100010001000398313301830373037241532895100010002000303730371110011000073216222630100030383038303830383038
10043037230061254825100010001000398313301830373037241532895100010002000303730371110011000073216222630100030383038303830383038
10043037230061254825100010001000398313301830373037241532895100010002000303730371110011000073216222630100030383038303830383038
10043037230061254825100010001000398313301830373037241532895100010002000303730371110011000073216222630100030383038303830383038
10043037230061254825100010001000398313301830373037241532895100010002000303730371110011000073216222630100030383038303830383038
10043037230061254825100010001000398313301830373037241532895100010002000303730371110011000073216222630100030383038303830383038
10043037220061254825100010001000398313301830373037241532895100010002000303730371110011000073216222630100030383038303830383038
10043037230061254825100010001000398313301830373037241532895100010002000303730371110011000073216222702100030383038303830383038
100430372301861254825100010001000398313301830373037241532895100010002000303730371110011000073216222630100030383038303830383038
100430372201261254825100010001000398313301830373037241532895100010002000303730371110011000073216222630100030383038303830383038

Test 2: Latency 1->2

Code:

  sqdmulh v0.4s, v0.4s, v1.s[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)03l2 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 miss (a1)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102043003722500000612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010002107101161129634100001003003830038300383003830038
102043003722500000103295482510100100100001001000050042773131300183003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
10204300372240000061295482510100100100001001000050042773131300183003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830228
10204300372250000061295482510100100100001001000050042773131300183003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
10204300372250000061295482510100100100001001000050042773131300183003730037282653287451010020010000204200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
102043003722500012061295482510100100100001001000050042773131300183003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
10204300372250000061295482510100100100001001000050042773131300183003730037282653287451010020010000200200003003730037111020110099100100100001000107101161129634100001003003830038300383003830038
102043003722400000612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010004307101161129634100001003003830038300383003830038
102043003722500000612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010001207101321129634100001003003830038300383003830038
10204300372250000061295482510100100100001001000050042773131300183003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038

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)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)9fld 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
1002430037225061295482510010101000010100005042773130300180300373003728287328767100102010000202000030037300371110021109101010000100001506402162229668010000103003830038300383003830038
100243003722506129548251001010100001010000504277313030018030037300372828732876710010201000020200003003730037111002110910101000010000006402162229630010000103003830038300383003830038
100243003722506129548251001010100001010000504277313130018030037300372828732876710010201000020200003003730037211002110910101000010000306402162229630010000103003830038302273003830038
100243003722506129548251001010100001010000504277313130018030037300372828732876710010201000020200003003730037111002110910101000010000006402162229630210000103003830038300383003830038
1002430037225126129548251001010100001010000504277313130018030037300372828732876710010201000020200003003730037111002110910101000010000006402162229630010000103003830038300383003830038
10024300372251261295482510010101000010100005042773131300180301783017828297112878710462221000020200003003730037111002110910101000010000006402162229630010000103003830038300383003830038
100243003722506129548251001010100001010000554277313130018030037300372828732876710010201000020200003003730037111002110910101000010000006402412229630010000103003830038300383003830038
1002430037225396129548251001010100001010000504277313130018030037300372828732876710010221000020200003003730037111002110910101000010000006402162229630010000103003830038300383003830038
1002430037226012429548251001010100001010000504277313130018030037300372828732876710010201000020200003003730037211002110910101000010000006402162229630010000103003830227300383003830038
1002430037225023129548251001010100001010000504277313130018030037300372828732876710010201066420200003003730037111002110910101000010000006402162229630010000103003830038300383003830038

Test 3: Latency 1->3

Code:

  sqdmulh v0.4s, v1.4s, v0.s[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)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)9fl1d tlb access (a0)l1d cache writeback (a8)branch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020430037225061295482510100100100001001000050042773133001803003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
1020430037225061295482510100100100001001000050042773133001803003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
1020430037225061295482510100100100001001000050042773133001803003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
1020430037225061295482510100100100001001000050042773133001803003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
1020430037225084295482510100100100001001000050042773133001803003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003023330038300383003830038
1020430037224061295482510110100100001001000050042810023001803003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129702100001003003830038300383003830038
1020430037225061295482510100100100001001000050042773133001803003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
1020430037225061295482510100100100001001000050042773133001803003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
10204300372243061295482510100100100001001000054742773133001803003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
1020430037225061295482510100100100001001000050042773133001803003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830087300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03l2 tlb miss instruction (0a)181e3f4e51schedule 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
1002430037225000631295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000640216222963010000103003830038300383003830038
100243003722500061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000640216222963010000103003830038300383003830038
100243003722500061295392510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000640216642963010000103008530225301793013230085
100243003722506061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000640216222963010000103003830038300383003830038
100243003722500061295482510010101000010100005042773131300183003730037282873287671001020100002020000300373003711100211091010100001000640216222963010000103003830038300383003830038
1002430037225000612954825100101010000101000050427731313001830037300372828726287671001020100002020000300373003711100211091010100001000640216222963010000103003830038300383003830038
100243003722500061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000640216222963010000103003830038300383003830038
100243003722500084295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001020640216222963010000103003830038300383003830038
100243003722400061295482510010101000010100005042773130300183003730085282873287671001020100002020000300373003711100211091010100001003640216222963010000103003830038300383003830038
100243003722500084295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000640216222963010000103003830038300383003830038

Test 4: throughput

Count: 8

Code:

  sqdmulh v0.4s, v8.4s, v9.s[1]
  sqdmulh v1.4s, v8.4s, v9.s[1]
  sqdmulh v2.4s, v8.4s, v9.s[1]
  sqdmulh v3.4s, v8.4s, v9.s[1]
  sqdmulh v4.4s, v8.4s, v9.s[1]
  sqdmulh v5.4s, v8.4s, v9.s[1]
  sqdmulh v6.4s, v8.4s, v9.s[1]
  sqdmulh v7.4s, v8.4s, v9.s[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)03181e1f3f51schedule 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)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420060150000374258010010080000100800005006400002002020039200399973039997801002008000020016000020039200391180201100991001008000010000051107164420036800001002004020040200402004020040
802042003915000041258010010080000100800005006400002002020039200399973039997801002008000020016000020039200391180201100991001008000010000051103165420036800001002004020040200402004020040
802042003915000041258010010080000100800005006400002002020113200399982039997801002008000020016000020039200391180201100991001008000010000651105165520036800001002004020040200402004020040
802042003915000041258010010080000100800005006400002002020039200399973039997801002008000020016000020039200391180201100991001008000010000051105164520036800001002004020040200402004020040
802042003915000041258010010080000100800005006400002002020039200399973039997801002008000020016000020039200391180201100991001008000010000051105165420036800001002004020040200402004020040
802042003915000062258010010080000100800005006400002002020039200399973039997801002008000020016000020039200391180201100991001008000010000051105166520036800001002004020040200402004020040
802042003915000041258010010080000100800005006407882002020039200399973039997801002008000020016000020039200391180201100991001008000010000051104165420036800001002004020040200402004020040
8020420039150000421258010010080000100800005006400002002020039200399973039997801002008000020016000020039200391180201100991001008000010000051104165420036800001002004020040200402004020040
802042003915000041258010010080000100800005006400002002020039200399973039997801002008000020016000020039200391180201100991001008000010000651104165620036800001002004020040200402004020040
802042003915000041258010010080000100800005006400002002020039200399973039997801002008000020016000020039200391180201100991001008000010000051105163520036800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03091e3f51schedule 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)5f60696b6d6emap 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)accfl1i cache miss demand (d3)d5map dispatch bubble (d6)ddfetch restart (de)e0eaeb? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200481500040258001010800001080000506400000120020020039200399996310019800102080000201600002003920039118002110910108000010005020017161717200360080000102024320040200402004020040
80024200391500070525800101080000108000050640000112002002003920039999631001980010208000020160000200392003921800211091010800001000502001716177200360080000102004020040200402004020040
800242003915000402580010108000010800005064000001200200200392003999963100198001020800002016000020039200391180021109101080000100050200716147200360080000102004020040200402004020040
800242003915000402580010108000010800005064000001200200200392003999963100198001020800002016000020039200391180021109101080000100050200716177200360080000102004020040200402004020040
8002420039150004025800101080000108000050640000012002002003920039999631001980010208000020160000200392003911800211091010800001019350200716717200360080000102004020040200402004020040
8002420039150004025800101080000108000050640000012002002003920039999631001980010208000020160000200392003911800211091010800001003502001716717200360080000102004020040200402004020040
800242003915000402580010108000010800005064000000200200200392003999963100198001020800002016000020039200391180021109101080000100050201171617172003615580000102004020040200402004020040
8002420039150004025800101080000108000050640000002002002003920039999631001980010208000020160000200392003911800211091010800001000502007161717200360080000102004020040200402004020040
8002420039150004025800101080000108000050640000012002002003920039999631001980010208000020160000200392003911800211091010800001000502001716717200360080000102004020040200402004020040
800242003915000462580010108000010800005064000001200200200392003999963100198001020800002016000020039200391180021109101080000100050200716714200360080000102004020040200402004020040