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

SQRDMULH (scalar, H)

Test 1: uops

Code:

  sqrdmulh h0, h0, h1
  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)0318191e1f3a3f4e51schedule 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)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100430372300000612548251000100010003983130301830373037241532895100010002000303730371110011000000073416222630100030383038303830383038
100430372300000612548251000100010003983130301830373037241532895100010002000303730371110011000000073216222630100030383038303830383038
1004303723002400612548251000100010003983130301830373037241532895100010002000303730371110011000000073216222630100030383038303830383038
100430372300000612548251000100010003983130301830373037241532895100010002000303730371110011000000073216222630100030383038303830383038
100430372300000612548251000100010003983130301830373037241532895100010002000303730371110011000000073216222630100030383038303830383038
100430372300000612548251000100010003983130301830373037241532895100010002000303730371110011000000073216222630100030383038303830383038
100430372200000612548251000100010003983130301830373037241532895100010002000303730371110011000000073216222630100030383038303830383038
100430372300000612548251000100010003983130301830373037241532895100010002000303730371110011000000373216222630100030383038303830383038
100430372300000612548251000100010003983130301830373037241532895100010002000303730371110011000000073216222630100030383038303830383038
100430372201000612548251000100010003983130301830373037241532895100010002000303730371110011000000073216222630100030383038303830383038

Test 2: Latency 1->2

Code:

  sqrdmulh h0, h0, h1
  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)03l1d tlb fill (05)mmu table walk instruction (07)l2 tlb miss instruction (0a)1e3f4e51schedule 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 cache writeback (a8)c2branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204300372250110127929548251010010010000100100005004277313300180300373003728272728740101002001000820020016300373003711102011009910010010000100001117181161129651100001003003830038300383003830038
10204300372240110125429548251010010010000106100005964277313300180300373003728272628741101002001000820020016300373003711102011009910010010000100001117171161129650100001003003830038300383003830038
102043003722500006129548251010010010000100100005004277313300180300373003728265328745101002001000020020000300373003711102011009910010010000100000007102162229634100001003003830038300383003830038
102043003722500006129548251010010010000100100005004277313300180300373003728265328745101002001000020020000300373003711102011009910010010000100000007102162229634100001003003830038300383003830038
102043003722500006129548251010010010000100100005004277313300180300373003728265328745101002001000020020000300373003711102011009910010010000100000007102162229634100001003003830038300383003830038
102043003722500006129548251010010010000100100005004277313300180300373003728265328745101002001000020020000300373003711102011009910010010000100000007102162229634100001003003830038300383003830038
102043003722500006129548251010010010000100100005004277313300180300373003728265328745101002001000020020000300373003711102011009910010010000100000007102162229634100001003003830038300383003830038
102043003722500006129548251010010010000100100005004277313300180300373003728265328745101002001000020020000300373003711102011009910010010000100000007102162229634100001003003830038300383003830038
102043003722500006129548251010010010000100100005004277313300180300373003728265328745101002001000020020000300373003711102011009910010010000100000007102162229634100001003003830038300383003830038
1020430037225000246129548251010010010000100100005004277313300180300613003728265328745101002001000020020000300373003711102011009910010010000100000007102162229634100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)0318191e3f4e51schedule 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)accdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024300372250006129548251001010100001010000504277313300180300373003728287328767100102010000202000030037300371110021109101010000100000640216222963010000103003830038300383003830038
10024300372250006129548251001010100001010000504277313300180300373003728287328767100102010000202000030037300371110021109101010000100000640216222963010000103003830038300383003830038
10024300372250006129548251001010100001010000504277313300180300373003728287328767100102010000202000030037300371110021109101010000100000640216222963010000103003830038300383003830038
10024300372250006129548251001010100001010000504277313300180300373003728287328767100102010000202000030037300371110021109101010000100000640216222963010000103003830038300383003830038
10024300372250006129539251001010100001010000504277313300180300373022728287328767100102010000202000030037300371110021109101010000100000640249222963010000103003830038301813003830038
10024301322250006129548251001010100001010000504277313300180300373003728287328767100102010000202000030037300371110021109101010000100000640216222963010000103003830038300383003830038
10024300372250006129548251001010100001010000504277313300180300373003728287328767100102010000202000030037300371110021109101010000100000640216222963010000103003830038300383003830038
10024300372250006129548251001010100001010000504277313300180300373003728287328767100102010000202000030037300371110021109101010000100000640216222963010000103003830038300383003830038
10024300372240006129548251001010100001010000504277313300180300373003728287328767100102010000202000030037300371110021109101010000100000640216242963010000103003830038300383003830038
10024300372250006129548251001010100001010000504277313301620300373003728287328767100102010000202000030037300371110021109101010000100000640216222963010000103003830038300383003830038

Test 3: Latency 1->3

Code:

  sqrdmulh h0, h1, h0
  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)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 mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102043003722500612954825101001001000010010000500427731313001830037300372826532874510100200100002002000030037300371110201100991001001000010003907101161129634100001003003830038300383003830038
10204300372250061295482510100100100001001000050042773131300183003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
10204300372250061295482510100100100001001000050042773131300183003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
10204300372250061295482510100100100001001000050042773131300183003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
10204300372251350130295482510100100100001001000050042773131300183003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
10204300372250061295482510100100100001001000050042773131300183003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
10204300372250061295482510100100100001001000050042773131300183003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
10204300372250061295482510100100100001001000050042773131300183003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
10204300372250061295482510100100100001001000050042773131300183003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038
10204300372250061295482510100100100001001000050042773131300183003730037282653287451010020010000200200003003730037111020110099100100100001000007101161129634100001003003830038300383003830038

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)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)st unit uop (a7)l1d cache writeback (a8)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002430037225000000061295482510010101000010100005042773133001830037300372830232876710010201000020200003003730037111002110910101000010000006403163329630010000103003830038300383003830038
1002430037225000000061295482510010101000010100005042773133001830037300372828732876710010201000020200003003730037111002110910101000010002006403163629705010000103003830038300383003830038
1002430037225000000061295482510010101000010100005042773133001830037300372828732876710010201000020200003003730037111002110910101000010000006403163329630010000103003830038300383003830038
1002430037224000000061295482510010101000010100005042773133001830037300372828732876710010201000020200003003730037111002110910101000010000006403163329630010000103003830038300383003830038
1002430037225000000061295482510010101000010100005042773133001830037300372828732876710010201000020200003003730037111002110910101000010000006403163329630010000103003830038300383003830038
1002430037225000000061295482510010101000010100005042773133001830037300372828732876710010201000020200003003730037111002110910101000010000006403163329630010000103003830038300383003830038
1002430037225000000061295482510010101000010100005042773133001830037300372828732876710010201000020200003003730037111002110910101000010000006403163329630010000103003830038300383003830038
1002430037224000000061295482510010101000010100005042773133001830037300372828732876710010201000020200003003730037111002110910101000010000006403163329630010000103003830038300383003830038
1002430037225000000061295482510010101000010100005042773133001830037300372828732876710010201000020200003003730037111002110910101000010000006403163329630010000103003830038300383003830038
1002430037225000000061295482510010101000010100005042773133001830037300372828732876710010201000020200003003730037111002110910101000010000006403163329630010000103003830038300383003830038

Test 4: throughput

Count: 8

Code:

  sqrdmulh h0, h8, h9
  sqrdmulh h1, h8, h9
  sqrdmulh h2, h8, h9
  sqrdmulh h3, h8, h9
  sqrdmulh h4, h8, h9
  sqrdmulh h5, h8, h9
  sqrdmulh h6, h8, h9
  sqrdmulh h7, h8, h9
  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)03181e3f51schedule 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)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042005915100412580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100000051102161120036800001002004020040200402004020040
802042003915000412580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100030051101161120036800001002004020040200402004020040
802042003915000622580212100800001008000050064000002006320039200399973399978010020080000200160000200392003911802011009910010080000100000051101161120036800001002010620040200402004020097
802042003915010412580100100800001008000050064000012002020039200399973399978010020080000200160000200392003911802011009910010080000100000051101161120036800001002004020040200402004020040
802042008915000412580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100100051101161120036800001002004020040200402004020040
802042003915000692580100100800001008000050064000012002020039203479973399978010020080000200160000200392003911802011009910010080000100030051101161120036800001002004020040200402004020040
8020420039150012412580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100000051101161120036800001002004020040200402004020040
802042003915000412580100100800001008000050064000002002020039200399973399978010020080000200160000200912003911802011009910010080000100000051101161120036800001002004020040200402004020040
8020420039150012412580100100800001008000050064000002002020039200399981399978010020080000200160000200392003911802011009910010080000100000051101162120036800001002004020040200402004020040
802042003915000412580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100000051101161120036800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)031e1f3f51schedule 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 cache writeback (a8)acc2branch cond mispred nonspec (c5)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420048185008225800101080000108000050640000020020200392003999963100198001020800002016000020039200391180021109101080000100132005020116112003680000102004020040200402004020040
8002420039185008225800101080000108000050640000120020200392003999963100198001020800002016000020039200391180021109101080000102100005020116112003680000102004020040200402004020040
8002420039185004025800101080000108000050640000120020200392003999963100198001020800002016000020039200391180021109101080000100030005020116112003680000102004020040200402004020040
8002420039185004025800101080000108000050640000120020200392003999963100198001020800002016000020039200391180021109101080000100000005020116112003680000102004020040200402004020040
800242003917401324025800101080000108000050640000020020200392003999963100198001020800002016000020039200391180021109101080000100000005020116112003680000102004020040200402004020040
8002420039173004025800101080000108000050640000120020200392003999963100198001020800002016000020039200391180021109101080000100000005020116112003680000102004020040200402004020040
8002420039173004025800101080000108000050640000020020200392003999963100198001020800002016000020039200391180021109101080000100000005020116112003680000102004020040200402004020040
8002420039174004025800101080000108000050640000120020200392003999963100198001020800002016000020039200391180021109101080000100000005020116112003680000102004020040200402004020040
8002420039161004025800101080000108000050640000020020200392003999963100198001020800002016000020039200391180021109101080000100000005020116112003680000102004020040200402004020040
8002420039160004025800101080000108000050640000020020200392003999963100198001020800002016000020039200391180021109101080000100000005020116112003680000102004020040200402004020040