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 (vector, 8H)

Test 1: uops

Code:

  frecps v0.8h, v0.8h, v1.8h
  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)031e3a3f4e51schedule 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
1004403730006134072510001000100053190804018403740373258338951000100020004037403711100110000073116113473100040384038403840384038
1004403731306134072510001000100053190804018403740373258338951000100020004037403711100110000073116113473100040384038403840384038
1004403730006134072510001000100053190804018403740373258338951000100020004037403711100110000073116113473100040384038403840384038
10044037301206134072510001000100053190804018403740373258338951000100020004037403711100110000073116113473100040384038403840384038
10044037302706134072510001000100053190804018403740373258338951000100020004037403711100110000073116113473100040384038403840384038
10044037302106134072510001000100053190804018403740373258338951000100020004037403711100110000073116113473100040384038403840384038
1004403730006134072510001000100053330404018403740373258338951000100020004037403711100110000073116113473100040384038403840384038
1004403730008234072510001000100053190814018403740373258338951000100020004037403711100110000073116113473100040384038403840384038
1004403730006134072510001000100053190814018403740373258338951000100020004037403711100110000073116113473100040384038403840384038
1004403730006134072510001000100053190804018403740373258338951000100020004037403711100110000073116113473100040384038403840384038

Test 2: Latency 1->2

Code:

  frecps v0.8h, v0.8h, v1.8h
  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)1e3a3f4e5051schedule 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)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
102044003729900061394074002125101001001000010010000500570690814001840037400373810833874510100200100002002000040037400371110201100991001001000010000071011621394790100001004003840038400384003840038
102044003730000061394074002125101001001000010010000500570690814001840037400373810833874510100200100002002000040037400371110201100991001001000010000071011611395530100001004003840038400384003840038
102044003730000010639407025101001001000010010000500570690814001840037400373810833874510100200100002002000040037400371110201100991001001000010000071011611394790100001004003840038400384003840038
10204400373000006139407025101001001000010010000500570690814001840037400373810833874510100200100002002000040037400371110201100991001001000010000071011611394790100001004003840038400384003840038
10204400373000006139407025101001001000010010000500570690814001840037400373810833874510100200100002002000040037400371110201100991001001000010000071011611394790100001004003840038400384003840038
10204400373000006139407025101001001000010010000500570690814001840037400373810833874510100200100002002000040037400371110201100991001001000010000071011611394790100001004003840038400384003840038
10204400372990006139407025101001001000010010000500570690814001840037400373810833874510100200100002002000040037400371110201100991001001000010000071011611394790100001004003840038400384003840038
10204400373000006139407025101001001000010010000500570690814001840037400373810833874510100200100002002000040037400371110201100991001001000010000071011611394790100001004003840038400384003840038
102044003730000073139407025101001001000010010000500570690814001840037400373810833874510100200100002002000040037400371110201100991001001000010000071011611394790100001004003840038400384003840038
10204400373000006139407025101001001000010010000500570690814001840037400373810833874510100200100002002000040037400371110201100991001001000010000071011611394790100001004003840038400384003840038

1000 unrolls and 10 iterations

Result (median cycles for code): 4.0037

retire uop (01)cycle (02)03l2 tlb miss data (0b)0e1e3f4e51schedule 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)accdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
100244003730000061394072510010101000010100005057069081400184003740037381303387671001020100002020000400374003711100211091010100001000006404164239473010000104003840038400384003840038
1002440037300000726394072510010101000010100005057069080400184003740037381303387671001020100002020000400374003711100211091010100001000006402164339473010000104003840038400384003840038
10024400373000012361394072510010101000010100005057069081400184003740037381303387671001020100002020000400374003711100211091010100001000006402162239473010000104003840038400384003840038
1002440037299000110394072510010101000010100005057069080400184003740037381303387671001020100002020000400374003711100211091010100001000006402162239473010000104003840038400384003840038
100244003729900061394072510010101000010100005057069080400184003740037381303387671001020100002020000400374003711100211091010100001000006402162239473010000104003840038400384003840038
1002440037300000103394072510010101000010100005057069081400184003740037381303387671001020100002020000400374003711100211091010100001000006402163239473010000104003840038400384003840038
100244003730100961394072510010101000010100005057069081400184003740037381303387671001020100002020000400374003711100211091010100001000006402163239473010000104003840038400384003840038
100244003730000061394072510010101000010100005057069081400184003740037381303387671001020100002020000400374003711100211091010100001000006402163239473010000104003840038400384003840038
1002440037300000613940725100101010000101000050570690814001840037400373813033876710010201000020200004003740037111002110910101000010027006402162239473010000104003840038400384003840038
100244003730000061394072510010101000010100005057069081400184003740037381303387671001020100002020000400374003711100211091010100001000006402163239473010000104003840038400384003840038

Test 3: Latency 1->3

Code:

  frecps v0.8h, v1.8h, v0.8h
  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)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)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)c2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204400373000613940725101001001000010010000500570690840018400374003738108338745101002001000020020000400374003711102011009910010010000100007101161139479100001004003840038400384003840038
10204400373000613940725101001001000010010000500570690840018400374003738108338745101002001000020020000400374003711102011009910010010000100007101161139479100001004003840038400384003840038
10204400373000613940725101001001000010010000500570690840018400374003738108338745101002001000020020000400374003711102011009910010010000100007101161139479100001004003840038400384003840038
10204400373000613940725101001001000010010000500570690840018400374003738108338745101002001000020020000400374003711102011009910010010000100007101161139479100001004003840038400384003840038
10204400373000613940725101001001000010010000500570690840018400374003738108338745101002001000020020000400374003711102011009910010010000100007101161139479100001004003840038400384003840038
10204400373000893940725101001001000010010000500570690840018400374003738108338745101002001000020020000400374003711102011009910010010000100007101161139479100001004003840038400384003840038
10204400373000613940725101001001000010010000500570690840018400374003738108338745101002001000020020000400374003711102011009910010010000100007101161139479100001004003840038400384003840038
10204400373000613940725101001001000010010000500570690840018400374003738108338745101002001000020020000400374003711102011009910010010000100007101161139479100001004003840038400384003840038
10204400373000613940725101001001000010010000500570690840018400374003738108338745101002001000020020000400374003711102011009910010010000100007101161139479100001004003840038400384003840038
10204400373000613940725101001001000010010000500570690840018400374003738108338745101002001000020020000400374003711102011009910010010000100007101161139479100001004003840038400384003840038

1000 unrolls and 10 iterations

Result (median cycles for code): 4.0037

retire uop (01)cycle (02)03mmu table walk data (08)1e1f3f4e51schedule 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
10024400373000006139407251001010100001010000505706908400184003740037381303387671001020100002020000400374003711100211091010100001000000640449423947310000104003840038400384003840038
100244003730003072639407251001010100001010000505706908400184003740037381303387671001020100002020000400374003711100211091010100001000001640316333947310000104003840038400384003840038
100244003730000061394072510010101000010100005057069084001840037400373813033876710010201000020200004003740037111002110910101000010011443600640416433947310000104003840038400384003840038
10024400373000006139407251001010100001010000505706908400184003740037381303387671001020100002020000400374003711100211091010100001000000640316243947310000104003840038400384003840038
10024400372990006139407251001010100001010000505706908400184003740037381303387671001020100002020000400374022711100211091010100001002000640316433947310000104003840182400384003840038
10024400373000006139407251001010100001010000505706908400184003740037381303387671001020100002020000400374003711100211091010100001000000640516343947310000104003840038402274003840038
10024400373000006139407251001010100001010000505706908400184003740037381303387671001020100002020000400374003711100211091010100001000040640216233947310000104003840038400384003840038
10024400373000006139407251001010100001010000505706908400184003740037381303387671001020100002020000400374003711100211091010100001000000640416343947310000104003840038400384003840038
100244008329900072639407251001010100001010000505706908400184008440084381303387671001020100002020000400374003711100211091010100001000000640416333947310000104003840038400384003840038
10024400373000006139407251001010100001010000505706908400184003740037381303387671001020100002020000400374003711100211091010100001000000640316433947310000104003840038400384003840038

Test 4: throughput

Count: 8

Code:

  frecps v0.8h, v8.8h, v9.8h
  frecps v1.8h, v8.8h, v9.8h
  frecps v2.8h, v8.8h, v9.8h
  frecps v3.8h, v8.8h, v9.8h
  frecps v4.8h, v8.8h, v9.8h
  frecps v5.8h, v8.8h, v9.8h
  frecps v6.8h, v8.8h, v9.8h
  frecps v7.8h, v8.8h, v9.8h
  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)03mmu table walk instruction (07)mmu table walk data (08)l2 tlb miss data (0b)18191e1f3a3f51schedule 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)a9acc2branch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042005915000000240042258010010080000100800005006400000200212004020040997339998801002008000020016000020040200401180201100991001008000010000000000511021611200370800001002004120041200412004120041
802042004015000000330042258010010080000100800005006400000200212004020040997339998801002008000020016000020040200401180201100991001008000010000000000511011611200370800001002004120041200412004120041
80204200401500000000042258010010080000100800005006400000200212004020040997339998801002008000020016000020040200401180201100991001008000010000000000511011611200370800001002004120041200412004120041
802042004015000000000327258010010080000100800005006400000200212004020040997339998801002008000020016000020040200401180201100991001008000010000000000511011611200370800001002004120041200412004120041
80204200401500000000042258010010080000100800005006400000200212004020040997339998801002008000020016000020040200401180201100991001008000010000000000511011611200370800001002004120041200412004120041
80204200401500000000042258010010080000100800005006400000200212004020040997339998801002008000020016000020040200401180201100991001008000010000000000511011611200370800001002004120041200412004120041
80204200401500000000042258010010080000100800005006400001200212004020040997339998801002008000020016000020040200401180201100991001008000010000000000511011611200370800001002004120041200412004120041
80204200401500000000042258010010080000100800005006400000200212004020040997339998801002008000020016000020040200401180201100991001008000010000000000511011611200370800001002004120041200412004120041
80204200401500000000042258010010080000100800005006400000200212004020040997339998801002008000020016000020040200401180201100991001008000010000000000511011611200370800001002004120041200412004120041
80204200401500000000042258010010080000100800005006400000200212004020040997139998801002008000020016000020040200401180201100991001008000010000000000511011611200370800001002004120041200412004120041

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)5f60696d6emap 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)a9accfd2d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200401502141258001010800001080000506400000020021200402004099963100208001020800002016000020040200401180021109101080000100000502001161120037080000102004120115200412010220041
8002420040150041258001010800001080000506400000020021200402004099963100208001020800002016000020040200401180021109101080000100000502001161120037080000102004120041200412004120041
8002420040150041258001010800001080000506400000020021200402004099963100208001020800002016000020040200401180021109101080000100000502001161120037080000102004120041200412004120041
8002420040150041258001010800001080000506400000020021200402004099963100208001020800002016000020040200401180021109101080000100000502001161120037080000102004120041200412004120041
80024200401503941258001010800001080000506400000020021200402004099963100208001020800002016000020040200401180021109101080000100100502001161120037080000102004120041200412004120041
8002420040150041258001010800001080000506400000020144200402004099963100208001020800002016000020040200401180021109101080000100000502001161120037080000102004120041200412004120041
8002420040150041258001010800001080000506400000020021200402004099963100208001020800002016000020040200401180021109101080000100000502001161120037080000102004120041200412004120041
8002420040150041258001010800001080000506400000020021200402004099963100208001020800002016000020040200401180021109101080000100000502001161120037080000102004120041200412004120041
8002420040150041258001010800001080000506400000120021200402004099963100208001020800002016000020040200401180021109101080000100000502001161120037080000102004120041200412004120041
8002420040150041258001010800001080000506400000020021200402004099963100208001020800002016000020040200401180021109101080000100000502001161120037080000102004120041200412004120041