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 (by element, 4H)

Test 1: uops

Code:

  sqrdmulh 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
100430372308225482510001000100039831303018303730372415328951000100020003037303711100110000073216112630100030383038303830773038
100430372206125482510001000100039831313018303730372415328951000100020003037303711100110000073116112630100030383038303830853038
100430372206125482510001000100039831303018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372206125482510001000100039831303018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372306125482510001000100039831303018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372206125482510001000100039831313018303730372415328951000100020003037303711100110000073116112682100030383038303830383038
100430372306125482510001000100039831303018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372306125482510001000100039831303018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372306125482510001000100039831303018303730372415328951000100020003037303711100110000073116112630100030383038303830383038
100430372306125482510001000100039831303018303730372415328951000100020003037303711100110000073116112630100030383038303830383038

Test 2: Latency 1->2

Code:

  sqrdmulh 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)03mmu table walk data (08)l2 tlb miss data (0b)18191e1f3a3f4e51schedule 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)acc2cfd5map dispatch bubble (d6)dbddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204300372240000420061295482510100100100001001000050042773131300183003730037282653287451010020010000200200003003730037111020110099100100100001000000710216022296340100001003003830038300383003830038
10204300372250000390061295482510100100100001001000050042773131300183003730037282653287451010020010000200200003003730037111020110099100100100001000000710216022296340100001003003830038300383003830038
10204300372250000540061295482510100100100001001000050042773130300183003730037282653287451010020010000200200003003730037111020110099100100100001000000710216022296340100001003003830038300383003830038
10204300372250011420061295482510100100100001001000050042773130300183003730037282653287451010020010000200200003003730037111020110099100100100001000000710216022296340100001003003830038300383003830038
1020430037225000090061295482510100100100001001000050042773131300183003730037282653287451010020010000200200003003730037111020110099100100100001000000710216022296340100001003003830038300383003830038
1020430037225000060061295482510100100100001001000050042773130300183003730037282653287451010020010000200200003003730037111020110099100100100001000000710216022296340100001003003830038300383003830038
1020430037225000000061295482510100100100001001000050042773131300183003730037282653287451010020010000200200003003730037111020110099100100100001000000710216022296340100001003003830038300383003830038
10204300372240000180061295482510100100100081001000050042773131300183003730037282653287451010020010000200200003003730037111020110099100100100001000000710216022296345100001003003830038300383003830038
10204300372250000390061295482510100100100001001000050042773130300183003730037282653287451010020010000200200003003730037111020110099100100100001000000710216022296340100001003003830038300383003830038
1020430037225000000061295482510100100100001001000050042773131300183003730037282653287451010020010000200200003003730037111020110099100100100001000000710216022296340100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03mmu table walk instruction (07)mmu table walk data (08)l2 tlb miss data (0b)18191e1f3a3f4e51schedule 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 cache writeback (a8)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
100243003722500000000612954825100101010000101000050427731313001803003730037282873287671001020100002020000300373003711100211091010100001000006402162229630010000103003830038300383003830038
100243003722500000000612954825100101010000101000050427731313001803003730037282873287671001020100002020000300373003711100211091010100001000007212162229630010000103003830038300383003830038
100243003722500000000612954825100101010000101000050427731303001803003730037282873287671001020100002020000300373003711100211091010100001000006402162229630010000103003830038300383003830038
100243003722500000000612954825100101010000101000050427731313001803003730037282873287671001020100002020000300373003711100211091010100001000006402162229630010000103003830038300383003830038
100243003722400000000612954825100101010000101000050427731313001803003730037282873287671001020100002020000300373003711100211091010100001000006402162229630010000103003830038300383003830038
100243003722500000000612954825100101010000101000050427731313001803003730037282873287671001020100002020000300373003711100211091010100001000006402162229630010000103003830038300383003830038
100243003722500000000612954825100101010000101000050427731313001803003730037282873287671001020100002020000300373003711100211091010100001000006402162229630010000103003830038300383003830038
100243003722500000000612954825100101010000101000050427731313001803003730037282873287671001020100002020000300373003711100211091010100001000006402162229630010000103003830038300383003830038
100243003722400000000612954825100101010000101000050427731313001803003730037282873287671001020100002020000300373003711100211091010100001000006402162229630010000103003830038300383003830038
100243003722500000900612953016410060101004811110438242854551302700303693031828315332889810908201016820223003036830367911002110910101000010411756327863942329882510000103036730370303683040730371

Test 3: Latency 1->3

Code:

  sqrdmulh 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)03l2 tlb miss data (0b)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)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
10204300372250072629548251010010010000100100005004277313030018300373003728265328745101002001000020020000300373003711102011009910010010000100037101161129634100001003003830038300383003830038
10204300372250061295482510100100100001001000050042773130300183003730037282653287451010020010000200200003003730037111020110099100100100001001667101161129634100001003003830038300383003830038
1020430037225006129548251010010010000100100005004277313030018300373003728265328745101002001000020020000300373003711102011009910010010000100037101161129634100001003003830038300383003830038
10204300372250061295482510100100100001001000050042773130300183003730037282653287451010020010000200200003003730037111020110099100100100001000547101161129634100001003003830038300383003830038
10204300372250061295482510100100100001001000050042773130300183003730037282653287451010020010000200200003003730037111020110099100100100001000367101161129634100001003003830038300383003830038
1020430037224006129548251010010010000100100005004277313030018300373003728265328745101002001000020020000300373003711102011009910010010000100007101161129634100001003003830038300383003830038
10204300372250025129548251010010010000100100005004277313030018300373008428265328745101002001000020020000300373003711102011009910010010000100037101161129634100001003003830038300383003830038
1020430037225006129548251010010010000100100005004277313030018300373003728265328745101002001000020020000300373003711102011009910010010000100037101161129634100001003003830038300383003830038
1020430037241006129548251010010010000100100005004277313030018300373003728265328745101002001000020020000300373003711102011009910010010000100037101161129634100001003003830038300383003830038
1020430037225006129548251010010010000100100005004277313030018300373003728265328745101002001000020020000300373003711102011009910010010000100067101161129634100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03191e3f4e51schedule 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)cfl1i cache miss demand (d3)d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
100243003722501261295482510010101000010100005042773131300183003730037282873287671001020100002020000300373003711100211091010100001000064002162229630010000103003830038300383003830038
1002430037225002705295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000064002162229630010000103003830038300383003830038
10024300372250061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000064002162229630010000103003830038300383003830038
100243003722500569295482510010101000010100005042773131300183003730037282873287671001020100002020000300373003711100211091010100001000064002162229630010000103003830038300383003830038
10024300372250061295482510010101000010100005042773130300183003730037282913287671001020100002020000300373003711100211091010100001000064002162229630010000103003830038300383003830038
10024300372250061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000164002162229630010000103003830038300383003830038
10024300372250061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000064002162229630010000103003830038300383003830038
10024300372250061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000064002162229630010000103003830038300383003830038
10024300372250061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000064002162229630010000103003830038300383003830038
10024300372251061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000064002162229630010000103003830038300383003830038

Test 4: throughput

Count: 8

Code:

  sqrdmulh v0.4h, v8.4h, v9.h[1]
  sqrdmulh v1.4h, v8.4h, v9.h[1]
  sqrdmulh v2.4h, v8.4h, v9.h[1]
  sqrdmulh v3.4h, v8.4h, v9.h[1]
  sqrdmulh v4.4h, v8.4h, v9.h[1]
  sqrdmulh v5.4h, v8.4h, v9.h[1]
  sqrdmulh v6.4h, v8.4h, v9.h[1]
  sqrdmulh 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)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)6061696b6d6emap 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)a9acbranch mispred nonspec (cb)cfd0d5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420071150041258010010080000100800005006400000020020020039200399973399978010020080000200160000200392003911802011009910010080000100340960511004162220036800001002004020040200402004020040
802042003915004125801001008000010080000500640000002002002003920039997339997801002008000020016000020039200391180201100991001008000010042000511002162220036800001002004020040200402004020040
8020420039150041258010010080000100800005006400000020020020039200399973399978010020080000200160000200392003911802011009910010080000100360630511002162220036800001002004020040200402004020040
8020420039157048425801001008000010080000500640000002002002003920039997339997801002008000020016000020039200391180201100991001008000010021000511002162220036800001002004020040200402004020040
80204200391500412580100100800001008000050064000000200200200392003999733999780100200800002001600002003920039118020110099100100800001000000511002162220036800001002004020040200402004020040
8020420039150041258010010080000100800005006400000020020020039200399973399978010020080000200160000200392003911802011009910010080000100001260511002162320036800001002004020040200402004020040
80204200391500412580100100800001008000050064000010200200200392003999733999780100200800002001600002003920039118020110099100100800001000030511002162220036800001002004020040200402004020040
80204200391500412580100100800001008000050064000000200200200392003999733999780100200800002001600002003920039118020110099100100800001000000511002162220036800001002004020040200402004020040
802042003915004125801001008000010080000500640000102002002003920039997339997801002008000020016000020039200391180201100991001008000010051030511002162220036800001002004020040200402004020040
802042003915004125801001008000010080000500640000002002002003920039997339997801002008000020016000020039200391180201100991001008000010029030511002162220036800001002004020040200402004020040

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03mmu table walk data (08)1e3a3f51schedule 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)9fst unit uop (a7)l1d cache writeback (a8)acbranch cond mispred nonspec (c5)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420048150000402580010108000010800005064000012002020039200399996310019800102080000201600002003920039118002110910108000010000005020516112003680000102004020040200402004020040
8002420039150000402580010108000010800005064000002014120039200399996310019800102080000201600002003920039118002110910108000010000005020116222003680000102004020040200402004020040
80024200391500004025800101080000108000050640000120020200392003999963100198001020800002016000020039200391180021109101080000100015005020116112003680000102004020040200402004020040
800242003915000040258001010800001080000506400001200202003920039999631001980010208000020160000200392003911800211091010800001000129005020216222003680000102004020040200402004020040
80024200391500004025800101080000108000050640000120020200392003999963100198001020800002016000020039200391180021109101080000100090005020216222003680000102004020040200402004020040
8002420039150000402580010108000010800005064000012002020039200399996310019800102080000201600002003920039118002110910108000010000005020216222003680000102004020040200402004020040
80024200391500004025800101080000108000050640000120020200392003999963100198001020800002016000020039200391180021109101080000100015005020116112003680000102004020040200402004020040
80024200391500004025800101080000108000050640000120020200392003999963100198001020800002016000020039200391180021109101080000100018005020216222003680000102004020040200402004020040
80024200391500004025800101080000108000050640000120020200392003999963100198001020800002016000020039200391180021109101080000100015005020116112003680000102004020040200402004020040
8002420039150000402580010108000010800005064000012002020039200399996310019800102080000201600002003920039118002110910108000010003005020116112003680000102004020040200402004020040