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, 2S)

Test 1: uops

Code:

  sqdmulh v0.2s, v0.2s, 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)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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100430372301962548251000100010003983130301830373037241532895100010002000303730371110011000073116112630100030383038303830383038
10043037230612548251000100010003983130301830373037241532895100010002000303730371110011000073116112630100030383038303830383038
10043037230612548251000100010003983130301830373037241532895100010002000303730371110011000073116112630100030383038303830383038
10043037230612548251000100010003983130301830373037241532895100010002000303730371110011000073116112630100030383038303830383038
10043037220612548251000100010003983130301830373037241532895100010002000303730371110011000073116112630100030383038303830383038
100430372342612548251000100010003983130301830373037241532895100010002000303730371110011000073116112630100030383038303830383038
10043037230612548251000100010003983130301830373037241532895100010002000303730371110011000073116112630100030383038303830383038
10043037220612548251000100010003983130301830373037241532895100010002000303730371110011000973116112630100030383038303830383038
100430372201722548251000100010003983130301830373037241532895100010002000303730371110011000073116112630100030383038303830383038
100430372301472548251000100010003983130301830373037241532895100010002000303730371110011000073116112630100030383038303830383038

Test 2: Latency 1->2

Code:

  sqdmulh v0.2s, v0.2s, 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)191e1f3f4e51schedule 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)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102043003722500210612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100000007102162229634100001003003830038300383003830038
102043003722500120612954825101001001000010010000527427731330090300373003728265328745101002001000020020000300373003711102011009910010010000100000007102162229634100001003003830038300383003830038
10204300372250060612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100000007102162229634100001003003830038300383003830038
10204300372240000612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100000007102162229634100001003003830038300383003830038
1020430037225004980612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100000007102162229634100001003003830038300383003830038
1020430037225001201562954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100000007102162229634100001003003830038300383003830038
102043003722500120612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100010007102162229634100001003003830038300383003830038
102043003722500301032954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100000028002162229670100001003003830038300383003830038
1020430037224001080612954825101001001000010010000622427731330018300373013228265328745101002001000020020000300373003711102011009910010010000100000007102162229634100001003003830038300383003830038
10204300372250090612954825101001001000010010000500427731330018300373003728265328745101002001000020020000300373003711102011009910010010000100000007102162229634100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03mmu table walk data (08)l2 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
100243003722500000061295482510010101000010100005042773130300183003730037282923287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
100243003722500000061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100221091010100001000000006402162229630010000103003830038300383003830038
100243003722500000061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
100243003722500000061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
100243003722500000061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
100243003722500000061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
100243003722500000061295482510010101000010100006042773130300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
10024300372250000474061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
100243003722500000061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038
100243003722500000061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000000006402162229630010000103003830038300383003830038

Test 3: Latency 1->3

Code:

  sqdmulh v0.2s, v1.2s, 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)03181e3f4e51schedule 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)branch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)ea? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204300372250061295482510100100100001001000050042773130300183003730037282653287451010020010000200200003003730037111020110099100100100001000000710116112963402100001003003830038300383003830038
10204300372240061295482510100100100001001000050042773130300183003730037282653287451010020010000200200003003730037111020110099100100100001000000710116112963400100001003003830038300383003830038
10204300372250061295482510100100100001001000050042773130300183003730037282653287451010020010000200200003003730037111020110099100100100001000000710116112963400100001003003830038300383003830038
1020430037225028861295482510100109100081001000050042773131300183003730037282653287451010020010000200200003003730037111020110099100100100001000000710116112963400100001003003830038300383003830038
10204300372240061295482510100100100001001000050042773130300183003730037282653287451010020010000200200003003730037111020110099100100100001000000710116112963400100001003003830038300383003830038
10204300372250061295482510100100100001001000050042773130300183003730037282653287451010020010000200200003003730037111020110099100100100001000000710116112963400100001003003830038300383003830038
10204300372250061295482510100100100001001000050042773131300183003730037282653287451010020010000200200003003730037111020110099100100100001000000710116112963400100001003003830038300383003830038
10204300372250061295482510100100100001001000050042773131300183003730037282653287451010020010000200200003003730037111020110099100100100001000000710116112963400100001003003830038300383003830038
10204300372250061295482510137100100001001000050042773131300183003730037282653287451010020010000200200003003730037111020110099100100100001000000710116112963400100001003003830038300383003830038
10204300372250061295482510100100100001001000050042773130300183003730037282653287451010020010000200200003003730037111020110099100100100001000000710116112963400100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03191e1f3f4e51schedule 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
1002430037225039061295482510010101000010100005042773131300183003730037282873287671001020100002020000300373008411100211091010100001000640316332963010000103003830038300383003830038
100243003722400061295482510010101000010100005042773131300183003730037282873287671001020100002020000300373003711100211091010100001000640316332963010000103003830038300383003830038
10024300372250360061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000640316332963010000103003830038300383003830038
100243003722500061295482510010101000010100005042773131300183003730037282873287671001020100002020000300373003711100211091010100001000640316332963010000103003830038300383003830038
1002430037225000251295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000640316332963010000103003830038300383003830038
1002430037225015061295482510010101000010100005042773131300183003730037282873287671001020100002020000300373003711100211091010100001000640316332963010000103003830038300383003830038
10024300372250006129548251001010100001010000504277313030018300373003728287328767100102010000202000030037300371110021109101010000100156640316332963010000103003830038300383003830038
1002430037225030061295482510010101000010100005042773131300183003730037282873287671001020100002020000300373003711100211091010100001000640316332963010000103003830038300383003830038
100243003722400061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000640316332963010000103003830038300383003830038
100243003722500061295482510010101000010100005042773130300183003730037282873287671001020100002020000300373003711100211091010100001000640316332963010000103003830038300383003830038

Test 4: throughput

Count: 8

Code:

  sqdmulh v0.2s, v8.2s, v9.s[1]
  sqdmulh v1.2s, v8.2s, v9.s[1]
  sqdmulh v2.2s, v8.2s, v9.s[1]
  sqdmulh v3.2s, v8.2s, v9.s[1]
  sqdmulh v4.2s, v8.2s, v9.s[1]
  sqdmulh v5.2s, v8.2s, v9.s[1]
  sqdmulh v6.2s, v8.2s, v9.s[1]
  sqdmulh v7.2s, v8.2s, 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)03l2 tlb miss data (0b)18191e3f51schedule 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)9fld unit uop (a6)l1d cache writeback (a8)c2cfd0d5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042003915000101812580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100000511052161120036800001002004020040200402004020040
80204200391500000412580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100000511001161120036800001002004020040200402004020040
80204200391500000412580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100000511001161120036800001002004020040200402004020040
80204200391500000412580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100000511001161120036800001002004020040200402004020040
80204200391500000412580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100000511001161120036800001002004020040200402004020040
80204200391500000412580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100000511001161120036800001002004020040200402004020040
80204200391500000412580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100000511001161120036800001002004020040200402004020040
80204200391500000412580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100000511001161120036800001002004020040200402004020040
80204200391500000412580100100800001008000050064000002002020039200399973399978010020080000200160000200392003911802011009910010080000100000511051161120036800001002004020040200902004020040
802042003915000004125801001008000010080000500640000020020200392003999737100228021720080105200160000200392014121802011009910010080000100000511001161120036800001002004020040200402004020040

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)191e1f3a3f51schedule 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)accdcfl1i cache miss demand (d3)d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242004815000300402580010108000010800005064000002002020039200399996310019800102080000201600002003920039118002110910108000010000502005165820036080000102004020040200402004020040
800242003915000000402580010108000010800005064000012002020039200399996310019800102080000201600002003920039118002110910108000010000502006167720036080000102004020040200402004020040
800242003915000000402580010108000010800005064000012002020039200399996310019800102080000201600002003920039118002110910108000010000502006166520036080000102004020040200402004020040
800242003915000000402580010108000010800005064000012002020039200399996310019800102080000201600002003920039118002110910108000010000502005166620036080000102004020040200402004020040
8002420039150001531760402580010108000010800005064000012002020039200399996310019800102080000201600002003920114118002110910108000010000502006166520036080000102004020040200402004020040
800242003915000000402580010108000010800005064000012002020039200399996310019800102080000201600002003920039118002110910108000010000502006165620036080000102004020040200402004020040
8002420039150000002302580010108000010800005064000012002020039200399996310019800102080000201600002003920039118002110910108000010000502005166520036080000102004020040200402004020040
8002420039150004200402580010108000010800005064000012002020039200399996310019800102080000201600002003920039118002110910108000010000502007168820036080000102004020040200402004020040
800242003914900000402580010108000010800005064000012002020039200399996310019800102080000201600002003920039118002110910108000010000502008167820036080000102004020040200402004020040
80024200391500013800402580010108000010800005064000002002020039200399996310019800102080000201600002003920039118002110910108000010000502008165520036080000102004020040200402004020040