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

FRECPS (scalar, D)

Test 1: uops

Code:

  frecps d0, d0, d1
  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)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
1004403730006134072510001000100053190804018403740373258338951000100020004037403711100110000073216223473100040384038403840384038
1004403731006134072510001000100053190804018403740373258338951000100020004037403711100110000073216223473100040384038403840384038
10044037300012634072510001000100053190804018403740373258338951000100020004037403711100110000073216223473100040384038403840384038
1004403730006134072510001000100053190814018403740373258338951000100020004037403711100110000073216223473100040384038403840384038
100440373004686134072510001000100053190804022403740373258338951000100020004037403711100110000073216223473100040384038403840384038
1004403731034861340725100010001000531908040184037403732583389510001000200040374037111001100001273216223473100040384038403840384038
1004403730006134072510001000100053190804018403740373258338951000100020004037403711100110000073216223473100040384038403840384038
1004403730006134072510001000100053190804018403740373258338951000100020004037403711100110000073216223473100040384038403840384038
10044037300186134072510001000100053190814018403740373258338951000100020004037403711100110000073216223473100040384038403840384038
100440373002046134072510001000100053190814018403740373258338951000100020004037403711100110000073216223473100040384038403840384038

Test 2: Latency 1->2

Code:

  frecps d0, d0, d1
  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 4.0037

retire uop (01)cycle (02)03mmu table walk data (08)1e3a3f4e51schedule 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)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204400372990001263940725101001001000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010007102162239479100001004003840038400384003840038
10204400373000001243940725101001001000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010007102162239479100001004003840038400384003840038
102044003730005708313940725101001001000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010007102162239479100001004003840038400384003840038
10204400373000002293940725101001001000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010007102162239479100001004003840038400384003840038
10204400373000001243940725101001001000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010007102162239479100001004003840038400384003840038
1020440037300001613940725101001001000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010007102162239479100001004003840038400384003840038
10204400373000001473940725101001001000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010007102162239479100001004003840038400384003840038
10204400372990001493940725101001001000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010007102162239479100001004003840038400384003840038
10204400373000002083940725101001001000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010007102162239479100001004003840038400384003840038
10204400373000001453940725101001001000010010000500570690804001840037400373810833874510100200100002002000040037400371110201100991001001000010007102162239479100001004003840038400384003840038

1000 unrolls and 10 iterations

Result (median cycles for code): 4.0037

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 tlb access (a0)l1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)a9accdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024400373000027439407251001010100001010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100000000640316333947310000104003840038400384003840038
1002440037300006139407251001010100001010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100000000640316333947310000104003840038400384003840038
10024400373000053639407251001010100001010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100000000640316333947310000104003840038400384003840038
1002440037300006139407251001010100001010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100001030678316333947310000104003840038400384003840038
100244003730015018939389251003310100001010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100000001640316333947310000104003840038400384003840038
1002440037300006139407251001010100001010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100000030640316333947310000104003840038400384003840038
10024400373000072639407251001010100001010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100000000640316333947310000104003840038400384003840038
1002440037300008439407251001010100001010000505706908140018400844003738130338767100102010000202000040037400371110021109101010000100000000640316333947310000104003840038400384003840038
1002440037299006139407251001010100001010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100000000640433333950910000104003840038400384003840038
1002440037300008739407251001010100001010000505706908140018400374003738130338767100102010000202000040037400371110021109101010000100000030640316333947310000104003840038400384003840038

Test 3: Latency 1->3

Code:

  frecps d0, d1, d0
  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 4.0037

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)acc2branch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102044003730000006139407251010010010000100100005005706908400184003740037381082638745101002001000020020000400374003711102011009910010010000100000007102161139479100001004003840038400384003840038
10204400373000000613940725101001001000010010000500570690840018400374003738108338745101002001000020020000400374003711102011009910010010000100000007101161139479100001004003840038400384003840038
10204400373000000613940725101001001000010010000500570690840018400374003738108338745101002001000020020000400374003711102011009910010010000100000007101161139479100001004003840038400384003840038
10204400373000000613940725101001001000010010000500570690840018400374003738108338745101002001018020020000400374003711102011009910010010000100000007101161139479100001004003840038400384003840038
10204400373000000613940725101001001000010010000500570690840018400374003738108338745101002001000020020000400374003711102011009910010010000100000007101161139479100001004003840038400384003840038
10204400373000000613940725101001001000010010000500570690840018400374003738108338745101002001000020020000400374003711102011009910010010000100003007101161139479100001004003840038400384003840038
10204400373000000613940725101001001000010010000500570690840018400374003738108338745101002001000020020000400374003711102011009910010010000100000007101161139479100001004003840038400384003840038
10204400372990000613940725101001001000010010000500570690840018400374003738108338745101002001000020020000400374003711102011009910010010000100000007101161139479100001004003840038400384003840038
10204400373001000613940725101001001000010010000500570690840018400374003738108338745101002001000020020000400374003711102011009910010010000100000007101161139479100001004003840038400384003840038
10204400372990000613940725101001001000010010000500570690840018400374003738108338745101002001000020020000400374003711102011009910010010000100000007101161139479100001004003840038400384003840038

1000 unrolls and 10 iterations

Result (median cycles for code): 4.0037

retire uop (01)cycle (02)03mmu table walk data (08)l2 tlb miss data (0b)181e1f3f4e51schedule 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)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024400373000000061394072510010101000010100005057069080400184003740037381303387671001020100002020000400374003711100211091010100001000640616223947310000104003840038400384003840038
10024400373000000061394072510010101000010100005057069080400184003740037381303387671001020100002020000400374003711100211091010100001000640216223947310000104003840038400384003840038
10024400373000000061394072510010101000010100005057069080400184003740037381303387671001020100002020000400374003711100211091010100001000640216223947310000104003840038400384003840038
10024400373000000061394072510010101000010100005057069080400184003740037381303387671001020100002020000400374003711100211091010100001000640216223947310000104003840038400384003840038
10024400372990000061394072510010101000010100005057069080400184003740037381303387671001020100002020000400374003711100211091010100001000640216223947310000104003840038400384003840038
100244003730000000156394072510010101000010100005057069080400184003740037381303387671001020100002020000400374003711100211091010100001000640216223947310000104003840038400384003840038
10024400373000000061394072510010101000010100005057069080400184003740037381303387671001020100002020000400374003711100211091010100001000640216223947310000104003840038400384003840038
10024400373000000061394072510010101000010100005057069081400184003740037381303387671001020100002020000400374003711100211091010100001000640216223947310000104003840038400384003840038
10024400373000000061394072510010101000010100005057069080400184003740037381303387671001020100002020000400374003711100211091010100001000640216223947310000104003840038400384003840038
100244003730001000631394072510010101000010100005057069080400184003740037381303387671001020100002020000400374003711100211091010100001000640216223947310000104003840038400384003840038

Test 4: throughput

Count: 8

Code:

  frecps d0, d8, d9
  frecps d1, d8, d9
  frecps d2, d8, d9
  frecps d3, d8, d9
  frecps d4, d8, d9
  frecps d5, d8, d9
  frecps d6, d8, d9
  frecps d7, d8, d9
  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)0309191e1f3f51schedule 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)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200591500036042258010010080000100800005006400001200622004020040997339998801002008000020016000020040200401180201100991001008000010000000051102161120037800001002004120041200412004120041
80204200401500024042258010010080000100800005006400001200212004020040997339998801002008000020016000020040200401180201100991001008000010000000051101161120037800001002004120041200412004120041
8020420040150100084258010010080000100800005006400000200212004020040997339998801002008000020016000020040200401180201100991001008000010000000351101161120037800001002004120041200412004120041
8020420040150000084258010010080000100800005006400000200212004020040997339998801002008000020016000020040200401180201100991001008000010000000051101161120037800001002004120041200412004120041
8020420040150000042258010010080000100800005006400000200212004020040997339998801002008000020016000020040200401180201100991001008000010000000051101161120037800001002004120041200412004120041
8020420106150006042258010010080000100800005006400001200212004020040997339998801002008000020016000020040200401180201100991001008000010000000051101161120037800001002004120041200412004120041
8020420040150000042258010010080000100800005006400001200232004020040997339998801002008000020016000020040200401180201100991001008000010000000051101161120037800001002004120041200412004120041
8020420040150006042258010010080000100800005006400000200212004020040997339998801002008000020016000020040200401180201100991001008000010000000051101161120037800001002004120041200412009820041
8020420040150000042258010010080000100800005006400000200212004020040997339998802242008000020016000020040200401180201100991001008000010000000051101161120037800001002004120041200412004120041
80204200401500000422580100100800001008000050064000002002120040200409973310082801002008000020016000020040200401180201100991001008000010000000051101161120037800001002004120041200412004120041

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)9fld unit uop (a6)l1d cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200491500412580010108000010800005064000012002120040200409996310020800102080000201600002004020040118002110910108000010000050207162420037080000102004120041200412004120041
80024200401500412580010108000010800005064000012002120040200409996310020800102080000201600002004020040118002110910108000010000050204162420037080000102004120041200412004120041
80024200401500412580010108000010800005064000012002120040200409996310020800102080000201600002004020040118002110910108000010000350204162420037080000102004120041200412004120041
80024200401500412580010108000010800005064000012002120040200409996310020800102080000201600002004020040118002110910108000010000050206164220037080000102004120041200412004120041
80024200401500412580010108000010800005064000012002120040200409996310020800102080000201600002004020040118002110910108000010000050204164220037080000102004120041200412004120041
800242004015042412580010108000010800005064000012002120040200409996310020800102080000201600002004020040118002110910108000010000050204164220037080000102004120041200412004120041
800242004015012412580010108000010800005064000012002120040200409996310020800102080000201600002004020040118002110910108000010000050202162420037080000102004120041200412004120041
80024200401500412580010108000010800005064000012002120040200409996310020800102080000201600002004020040118002110910108000010000350204162420037080000102004120041200412004120041
800242004015004125800101080000108000050640000120021200402004099963100208001020800002016000020040200401180021109101080000101100050202164220037080000102004120041200412004120096
800242004015033412580010108000010800005064000012002120040200409996310020800102080000201600002004020040118002110910108000010000050204164320037080000102004120041200412004120041