Apple M1 Microarchitecture Research by Dougall Johnson

Firestorm: Overview | Base Instructions | SIMD and FP Instructions
Icestorm:  Overview | Base Instructions | SIMD and FP Instructions

CMEQ (register, 4S)

Test 1: uops

Code:

  cmeq v0.4s, v0.4s, v1.4s
  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 (01)cycle (02)031e3f4e51inst issue (52)~issue fp/simd (54)~dispatch fp/simd (57)huge thing fp/simd (5b)696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op fp/simd (7e)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst neon or fp (9a)a8accfd5d6ddinst fetch restart (de)e0? fp/simd (ee)f5f6f7f8fd
10042037160821687251000100010002646802018203720371572318951000100020002037203711100110000073316331787100020382038203820382038
10042037150611687251000100010002646802018203720371572318951000100020002037203711100110000073316331787100020382038203820382038
100420371612611687251000100010002646802018203720371572318951000100020002037203711100110000073316331787100020382038208520382038
10042037150611687251000100010002646802018203720371572318951000100020002037203711100110000073316331787100020382038203820382038
10042037150611687251000100010002646802018203720371572318951000100020002037203711100110000073316231787100020382038203820382038
10042037150611687251000100010002646802018203720371572318951000100020002037203711100110000073316331787100020382038203820382038
10042037150611687251000100010002646802018203720371572318951000100020002037203711100110000073316331787100020382038203820382038
10042037150611687251000100010002646802018203720371572318951000100020002037203711100110000073316331787100020382038203820382038
10042037150611687251000100010002646802018203720371572318951000100020002037203711100110000073316331787100020382038203820382038
10042037150611687251000100010002646802018203720371572318951000100020002037203711100110000073316331787100020382038203820382038

Test 2: Latency 1->2

Code:

  cmeq v0.4s, v0.4s, v1.4s
  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 2.0037

retire (01)cycle (02)031e1f3f4e51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)60696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9faccfd5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
1020420037150006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100071011611197910100001002003820038200382003820038
10204200371500063196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001001271011611197910100001002003820038200382003820038
1020420037150006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100671011611197910100001002003820038200382003820038
1020420037150006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100071011611197910100001002003820038200382003820038
10204200371501351086119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100071011611197910100001002003820038200382003820038
1020420037150006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100971011611197910100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001001271011611197910100001002003820038200382003820038
1020420037150006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100971011611197910100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001002471011611197910100001002003820038200382003820038
1020420037150906119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100071011611197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire (01)cycle (02)0307080918191e1f3f4e51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)60696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa0a1a6a8a9accfd5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
1002420037150000010061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000038096405162219785010000102003820038200382003820038
100242003715000000006119687251001010100001010000502847680120018200372003718444318767100102010000202000020037200371110021109101010000100004101506402162219785010000102003820038200382003820038
10024200371500000000611968725100101010000101000050284768012001820037200371844431876710010201000020200002008520037111002110910101000010000440636402162219785010000102003820038200382003820038
1002420037150000000010319687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100002006402162219785010000102003820038200382003820038
10024200371500000000103196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000027066402162219785010000102003820038200382003820038
100242003715000000006119687251001010100001010000502847680120018200372003718444318767100102010000202000020037200371110021109101010000100000006402162219785010000102003820038200382003820038
100242003715000000006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100004601566402162219785010000102003820038200382003820038
1002420037150000009061196872510010101000010100005028502460200182003720037184443187671001020100002020000200372003711100211091010100001000024006403162219785010000102003820038200382003820038
100242003715000000001031968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000490396402162219785010000102003820038200382003820038
1002420037150000000061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000042006402162219785010000102003820038200382003820038

Test 3: Latency 1->3

Code:

  cmeq v0.4s, v1.4s, v0.4s
  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 2.0037

retire (01)cycle (02)0308191e1f3a3f4e51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa8accfd5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
10204200371500000025119687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
1020420037150000006119687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
1020420037150000006119687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
1020420037150000006119687251010010010000100100005002847680200182003720037184223187451010020010000200200002018020085111020110099100100100001000071011611197910100001002003820038200382003820038
10204200371500000061196872510100100100001001000050028476802001820037200371842231874510100200100002002000020037200371110201100991001001000010000710116111979110100001002003820038200382003820038
10204200371500000012619687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000071011611197910100001002003820038200382003820038
1020420037150000006119687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001005398671011611197910100001002003820038200382003820038
1020420037150000006119687251010010010000100100005002847680200182003720230184223187451010020010000200200002003720037111020110099100100100001004071011611197910100001002003820038200382003820182
1020420037150000006119687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000071011611198230100001002003820038200382003820038
1020420037150000006119687251010010010000100100005002847680200182003720037184227187451010020010000200200002003720037111020110099100100100001000071011611197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire (01)cycle (02)03080918191e1f3a3f4e51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)60696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa0a1a6a7a8a9acc2cfd5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
1002420037150000033001741968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000000006402162219785010000102003820038200382003820038
100242003714900000001451968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000000006402162219785010000102003820038200382003820038
10024200371500000000611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000000006402162219785010000102003820038200382003820038
10024200371500000000611968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000030006402162219785010000102003820038200382003820038
10024200371500000000611968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000000606402162219785010000102003820038200382003820038
100242003715000000006251968725100101010000101000050284768012001820037200371844431876710010201000020200002003720037111002110910101000010000000006402162219785010000102003820038200382003820038
100242003715000000004491968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000000606402162219785010000102003820038200382003820038
10024200371500000000821968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000000006402162219785010000102003820038200382003820038
10024200371500000000611968725100101010000101000050284896312001820037200851844431876710010201000020200002003720037111002110910101000010000000006402162219785010000102003820038200382003820038
1002420037150000000012781968725100101010000101000050284768002001820037200371844431876710010201000020200002003720037111002110910101000010000000306402162219785010000102003820038200382003820038

Test 4: throughput

Count: 8

Code:

  cmeq v0.4s, v8.4s, v9.4s
  cmeq v1.4s, v8.4s, v9.4s
  cmeq v2.4s, v8.4s, v9.4s
  cmeq v3.4s, v8.4s, v9.4s
  cmeq v4.4s, v8.4s, v9.4s
  cmeq v5.4s, v8.4s, v9.4s
  cmeq v6.4s, v8.4s, v9.4s
  cmeq v7.4s, v8.4s, v9.4s
  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 (01)cycle (02)031e3f51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)60696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa8cfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
802042003815001702580100100800001008000050064000002001920038200389973399968010020080000200160000200382003811802011009910010080000100151106162220035800001002003920039200392003920039
80204200381500402580100100800001008011250064000002001920038200389973399968010020080000200160000200382003811802011009910010080000100051102162220035800001002003920039200392019120039
80204200381509402580100100800001008000050064000002001920038200389973399968010020080000200160000200382003811802011009910010080000100051102162220035800001002003920039200392003920039
80204200381500402580100100800001008000050064000012001920038200389973399968010020080000200160000200382003811802011009910010080000100051102162220035800001002003920039200392003920039
802042003815001242580100100800001008000050064000002001920038200389973399968010020080000200160000200382003811802011009910010080000100051102162220035800001002003920039200392003920039
802042003815001452580100100800001008000050064000012001920038200389973399968010020080000200160000200382003811802011009910010080000100051102162220035800001002003920039200392003920039
802042003814901032580100100800001008000050064000002001920038200389973399968010020080000200160000200382003811802011009910010080000100051102162220035800001002003920039200392003920039
802042003815002142580100100800001008000050064000002001920038200389973399968010020080000200160000200382003811802011009910010080000100051102162220035800001002003920039200392003920039
802042003815001722580100100800001008000050064000012001920038200389973399968010020080000200160000200382003811802011009910010080000100051102162220035800001002003920039200392003920039
80204200381500402580100100800001008000050064000002001920038200389973399968010020080000200160000200382003811802011009910010080000100051102162220035800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire (01)cycle (02)03191e3f51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)60696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa8accfd5d6dbddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
8002420048150003925800101080000108000050640000120019200382003899963100458001020800002016000020038200381180021109101080000100050202160222003580000102003920039200392003920039
8002420038150006025800101080000108000050640000120019200382003899963100188001020800002016000020038200381180021109101080000100050203160222003580000102003920039200392003920039
8002420038150006025800101080000108000050640000120019200382003899963100188001020800002016000020038200381180021109101080000100050203160222003580000102003920039200392003920039
8002420038150003925800101080000108000050640000120019200382003899963100448001020800002016000020038200381180021109101080000101350202160322003580000102003920039200392003920039
80024200381500018625800101080000108000050640000120019200382003899963100188001020800002016000020038200381180021109101080000100050202160332003580000102003920039200392003920039
8002420038150003925800101080000108000050640000120019200382003899963100188001020800002016000020038200381180021109101080000103050203160222003580000102003920039200392003920039
80024200381500012325800101080000108000050640000120019200382003899963100188001020800002016000020038200381180021109101080000100050202160422003580000102003920039200392003920039
8002420038151003925800101080000108000050640000120019200382003899963100188001020800002016000020038200381180021109101080000100350203160222003580000102003920039200392003920039
80024200381500010425800101080000108000050640000120019200382003899963100188001020800002016000020038200381180021109101080000100050202160222003580000102003920039200392003920039
8002420038150003925800101080000108000050640000120019200382003899963100188001020800002016000020038200381180021109101080000100050202160232003580000102003920039200392003920039