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

EOR (register, lsr, 64-bit)

Test 1: uops

Code:

  eor x0, x0, x1, lsr #17
  mov x0, 1
  mov x1, 2

(no loop instructions)

1000 unrolls and 1 iteration

Retires: 1.000

Issues: 2.000

Integer unit issues: 2.000

Load/store unit issues: 0.000

SIMD/FP unit issues: 0.000

retire uop (01)cycle (02)031e3f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)606d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst int alu (97)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
1004203515061100017352520002000100032570120352035157531842100010002000203542111001100000731671117812000100020362036203620362036
1004203515061100017352520002000100032570120352035157531842100010002000203542111001100000731671117812000100020362036203620362036
10042035156061100017352520002000100032570120352035157531842100010002000203542111001100000731671117812000100020362036203620362036
1004203515061100017352520002000100032570120352035157531842100010002000207942111001100000731671117812000100020362036203620362036
1004203515661100017352520002000100032570120352035157531842100010002000203542111001100000731671117812000100020362036203620362036
1004203515061100017352520002000100032570120352035157531842100010002000203542111001100000731671117812000100020362036203620362036
1004203515061100017352520002000100032570120352035157531842100010002000203542111001100000731671117812000100020362036203620362036
1004203515061100017352520002000100032570120352035157531842100010002000203542111001100000731671117812000100020362036203620362036
100420351510861100017352520002000100032570120352035157531842100010002000203542111001100000731671117812000100020362036203620362036
1004203515061100017352520002000100032570120352035157531842100010002000203542111001100000731671117812000100020362036203620362036

Test 2: Latency 1->2

Code:

  eor x0, x0, x1, lsr #17
  mov x0, 1
  mov x1, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 2.0035

retire uop (01)cycle (02)033f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)60696a6d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)9fl1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
1020420035150278100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
102042003515061100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
102042003515061100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
102042003515061100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
102042003515061100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710159211979120000101002003620036200362003620036
1020420035150336100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
102042003515061100001980325201002010010100185342049169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
102042003515061100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
102042003515061100001980325201002010010100185342149169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
1020420035150103100001980325201002010010100185342049169552003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0035

retire uop (01)cycle (02)031e3f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)60696a6d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)9fl1d cache writeback (a8)c2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
10024200351508161100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640463341979220000100102003620036200362003620036
1002420035150061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640363441979220000100102003620036200362003620036
1002420035150061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640363441979220000100102003620036200362003620036
1002420035150061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640363341979220000100102003620036200362003620036
1002420035150061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640463431979220000100102003620036200362003620036
1002420035150061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640363441979220000100102003620036200362003620036
1002420035149061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640463441979220000100102003620036200362003620036
1002420035150061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640363431979220000100102003620036200362003620036
10024200351500536100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640463431979220000100102003620036200362003620036
1002420035150061100001974325200102001010010185310149169552003520035184513187181001010020200202003542111002110910100101000640363431979220000100102003620036200362003620036

Test 3: Latency 1->3

Code:

  eor x0, x1, x0, lsr #17
  mov x0, 1
  mov x1, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 2.0035

retire uop (01)cycle (02)03mmu table walk data (08)18191e1f3f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)696a6b6d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)9fl1d tlb miss (a1)l1d cache writeback (a8)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
10204200351500000061100001980325201002010010100185342491695502003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500000061100001980325201002010010100185342491695502003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500000061100001980325201002010010100185342491695532003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500000061100001980325201002010010100185342491695502003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500000061100001980325201002010010100185342491695502003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
102042003515000000145100001980325201002010010100185342491695502003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500000061100001980325201002010010100185342491695502003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500000061100001980325201002010010100185342491695502003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500000061100001980325201002010010100185342491695502003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200362003620036
10204200351500000061100001980325201002010010100185342491695502003520035184293187001010010200202002003542111020110099100101001000000710159111979120000101002003620036200792003620036

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0035

retire uop (01)cycle (02)03mmu table walk data (08)1e1f3f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)60696a6d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)9fl1d cache writeback (a8)acc2branch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
100242003515001206110000197432520010200101001018531014916955200352003518451318718100101002020020200354211100211091010010100000640263221979220000100102003620036200362003620036
10024200351500006110000197432520010200101001018531014916955200352003518451318718100101002020020200354211100211091010010100000640263221988320000100102003620036200362003620036
10024200351500006110000197432520010200101001018531014916955200352003518451318718100101002020020200354211100211091010010100000640263221979220000100102003620036200362003620036
10024200351500006110000197432520010200101001018531014916955200352003518451318718100101002020020200354211100211091010010100000640263221979220000100102007920036200362003620036
10024200351500006110000197432520010200101001018531014916955200352003518451318718100101002020020200354211100211091010010100000640263221979220000100102003620036200362003620036
10024200351500006110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000640263221979220000100102003620036200362003620036
10024200351500006110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000640263221979220000100102003620036200362003620036
10024200351500006110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000640263221979220000100102003620036200362003620036
10024200351500006110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000640263221979220000100102003620036200362003620036
10024200351500006110000197432520010200101001018531004916955200352003518451318718100101002020020200354211100211091010010100000640263221979220000100102003620036200362003620036

Test 4: throughput

Count: 8

Code:

  eor x0, x8, x9, lsr #17
  eor x1, x8, x9, lsr #17
  eor x2, x8, x9, lsr #17
  eor x3, x8, x9, lsr #17
  eor x4, x8, x9, lsr #17
  eor x5, x8, x9, lsr #17
  eor x6, x8, x9, lsr #17
  eor x7, x8, x9, lsr #17
  mov x8, 9
  mov x9, 10

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.3341

retire uop (01)cycle (02)03mmu table walk instruction (07)1e1f3f4c4d5051schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)6061696a6d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)9fl1d tlb miss (a1)l1d cache writeback (a8)a9accfd0d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
80204267702000006180000260940251601001601008010016431812492364526725267251661531667780100802001602002672539118020110099100801001000000511004221126717160000801002672626726267262672626726
802042672520000012480000260940251601001601008010016431812492364526725267251661531667780100802001602002672539118020110099100801001000100511001221126717160000801002672626726267262672626726
80205267252000006180000260940251601001601008010016431800492364526725267251661531667780100802001602002672539118020110099100801001000000511021221126717160000801002672626726267262672626726
80204267252000006180000260940251601001601008010016431812492364526725267251661531667780100802001602002672539118020110099100801001000000511001221126717160000801002672626726267262672626726
80204267252000006180000260940251601001601008010016431812492364526725267251661531667780100802001602002672539118020110099100801001000000511001221126717160000801002672626726267262672626726
80204267252000006180000260940251601001601008010016431800492364526725267251661531667780100802001602002672539118020110099100801001000000511021221126717160000801002672626726267262672626726
80204267252010006180000260940251601001601008010016431800492364526725267251661531667780100802001602002672539118020110099100801001000000511001221126717160000801002672626726267262672626726
80204267252000006180000260940251601001601008010016431800492364526725267251661531667780100802001602002672539118020110099100801001000000511021221126717160000801002672626726267262672626726
80204267252000006180000260940251601001601008010016431812492364526725267251661531667780100802001602002672539118020110099100801001000000511001221126717160000801002672626726267262672626726
80204267252000006180000260940251601001601008010016431812492364526725267251661531667780100802001602002672539118020110099100801001000000511001221126717160000801002672626726267262672626726

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.3339

retire uop (01)cycle (02)03mmu table walk instruction (07)mmu table walk data (08)18191e1f3f4c4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)6067696a6d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)9fl1d tlb miss (a1)acc2branch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)ea? int retires (ef)f5f6f7f8fd
8002426734200100000618000021280251600101600108001016314200492363126711267111662331668580010800201600202671139118002110910800101000005020132246267041600000800102671226712267122671226712
800242671120000000061800002128025160010160010800101631420049236312671126711166233166858001080020160020267113911800211091080010100000502042246267041600000800102671226712267122671226712
800242671120000000061800002128025160010160010800101631420049236312671126711166233166858001080020160020267113911800211091080010100000502042235267041600000800102671226712267122671226712
800242671120000000061800002128025160010160010800101631420049236312671126711166233166858001080020160020267113911800211091080010100000502032235267041600000800102671226712267122671226712
800242671120000000061800002128025160010160010800101631420049236312671126711166233166858001080020160020267113911800211091080010100000502052253267041600000800102671226712267122671226712
8002426711200000000124800002128025160010160010800101631421049236312671126711166233166858001080020160020267113911800211091080010100000502052254267041600000800102671226712267122671226712
800242671120000000061800002128025160010160010800101631421049236312671126711166233166858001080020160020267113911800211091080010100000502042264267041600000800102671226712267122671226712
800242671120000000061800002128025160010160010800101631420049236312671126711166233166858001080020160020267113911800211091080010100000502052246267041600000800102671226712267122671226712
800242671120000000061800002128025160010160010800101631420049236312671126711166233166858001080020160020267113911800211091080010100000502062264267041600000800102671226712267122671226712
800242671119900000061800002128025160010160010800101631420049236312671126711166233166858001080020160020267113911800211091080010100000502062256267041600000800102671226712267122671226712