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

UMAX (vector, 8H)

Test 1: uops

Code:

  umax 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)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)l1d cache writeback (a8)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
1004203716061168725100010001000264680120182037203715723189510001000200020372037111001100000073216221787100020382038203820382038
1004203715061168725100010001000264680020182037203715723189510001000200020372037111001100000073216221787100020382038203820382038
1004203715082168725100010001000264680020182037203715723189510001000200020372037111001100000073216221787100020382038203820382038
1004203715061168725100010001000264680020182037203715723189510001000200020372037111001100000073216221787100020382038203820382038
1004203715061168725100010001000264680020182037203715723189510001000200020372037111001100000073216221787100020382038203820382038
10042037151561168725100010001000264680120182037203715723189510001000200020372037111001100000073216221787100020382038203820382038
1004203716061168725100010001000264680020182037203715723189510001000200020372037111001100000073216221787100020382038203820382038
10042037150215168725100010001000264680020182037203715723189510001000200020372037111001100000073216221787100020382038203820382038
1004203715061168725100010001000264680020182037203715723189510001000200020372037111001100000073216221787100020382038203820382038
1004203715129251168725100010001000264680120182037203715723189510001000200020372037111001100000073216221787100020382038203820382038

Test 2: Latency 1->2

Code:

  umax 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): 2.0037

retire uop (01)cycle (02)03191e3f4e51schedule 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)simd prf full (72)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)cfd0d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204200371500082196872510100100100001001000050028476800200182003720037184220318745101002001000020020000200372003711102011009910010010000100000710011611197910100001002003820038200382003820038
102042003715000891196872510100100100001001000050028476800200182003720037184220318745101002001000020020000200372003711102011009910010010000100000710011611197910100001002003820038200382003820038
10204201321500061196872510100100100001001000050028476800200182003720037184220318745101002001000020020000200372003711102011009910010010000100000710011611197910100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476800200182003720037184220318745101002001000020020000200372003711102011009910010010000100000710011611197910100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100000710011611197910100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100000710011611197910100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100000710011611197910100001002003820038200382003820038
102042003715000145196872510100100100001001000050028476801200182003720037184220318760101002001000020020000200372003711102011009910010010000100002710011611197910100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476800200182003720037184220318745101002001000020020000200372003711102011009910010010000100000710011611197910100001002003820038200382003820038
102042003715000119196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100000710011611197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03mmu table walk instruction (07)mmu table walk data (08)09l2 tlb miss data (0b)18191e1f3a3f4e51schedule 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)60696b6d6emap 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)st unit uop (a7)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
1002420037150000000000147196872510010101000010100005028476800200180200372003718444318767100102010000202000020037200371110021109101010000100000000006403162219785010000102003820038200382003820038
100242003715000000000061196872510010101000010100005028476800200180200372003718444318767100102010000202000020037200371110021109101010000100000000006402162219785010000102003820038200382003820038
100242003715000000000061196872510010101000010100005028476800200180200372003718444318767100102010000202000020037200371110021109101010000100000003006402162219785010000102003820038200382003820038
100242003715000000000061196872510010101000010100005028476800200180200372003718444318767100102010000202000020037200371110021109101010000100000000006402162219785010000102003820038200382003820038
100242003715000000000061196872510010101000010100005028476800200180200372003718444318767100102010000202000020037200371110021109101010000100000000006402162219785010000102003820038200382003820038
100242003715000000000061196872510010101000010100005028476800200180200372003718444318767100102010000202000020037200371110021109101010000100000000006402162219785010000102003820038200382003820038
100242003715000000000061196872510010101000010100005028476800200180200372003718444318767100102010000202000020037200371110021109101010000100000000006402162219785010000102003820038200382003820038
100242003715000000000061196872510010101000010100005028476800200180200372003718444318767100102010000202000020037200371110021109101010000100000000006402162219785010000102003820038200382003820038
100242003715000000000061196872510010101000010100005028476800200180200372003718444318767100102010000202000020037200371110021109101010000100000000006402162219785010000102003820038200382003820038
100242003715000000000061196872510010101000010100005028476800200180200372003718444318767100102010000202000020037200371110021109101010000100000000006402162219785010000102003820038200382003820038

Test 3: Latency 1->3

Code:

  umax 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): 2.0037

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)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)st unit uop (a7)l1d cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204200371500906119687251010010010000100100005002847680200182003720132184223187451010020010000200200002003720037111020110099100100100001000000071031611197910100001002003820038200382003820038
10204200371500006119687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
10204200371500006119687251010010010000100100005002847680200182003720037184229187451027720010000200200002003720037111020110099100100100001002120071011611197910100001002003820038200382003820038
102042003715000072619687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071013211198250100001002003820038200382003820038
102042003715020018919687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
10204200371500006119687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
10204200371500006119687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
10204200371500006119687251010010010024100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382018320038
102042003715001206119687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071011611197910100001002003820038200382003820038
10204200371500006119687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000002971011611197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03091e3a3f4e51schedule 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)simd prf full (72)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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024200371500006119687251001010100001010000502847680020018200372003718444031876710010201000020200002003720037111002110910101000010000640316461978510000102003820038200382003820038
10024200371500006119687251001010100001010000502847680020018200372003718444031876710010201000020200002003720037111002110910101000010000640516561978510000102003820038200382003820038
10024200371550906119687251001010100001010000502847680020018200372003718444031876710010201000020200002003720037111002110910101000010000640516651978510000102003820038200382003820038
10024200371500006119687251001010100001010000502847680020018200372003718444031876710010201000020200002003720037111002110910101000010022014640516661978510000102003820038200382003820038
10024200371500006119687251001010100001010000502847680020018200372003718444031876710010201000020200002003720037111002110910101000010000640516551978510000102003820038200382003820038
100242003715000015619687251001010100001010000502847680020054200372003718444031876710010201000020200002003720037111002110910101000010000640516551978510000102003820038200382003820038
10024200371500006119687251001010100001010000502847680020018200372003718444031876710010201000020200002003720037111002110910101000010000640616561978510000102003820038200382003820038
10024200371500006119687251001010100001010000502847680020018200372003718444031876710010201000020200002003720037111002110910101000010000640516551978510000102003820038200382003820038
100242003715004806119687251001010100001010000502847680020018200372003718444031876710010201000020200002003720037111002110910101000010050640516651978510000102003820038200382003820038
100242003715001206119676251001010100001010000502847680020018200372003718444031876710010201000020200002003720037111002110910101000010000640416551978510000102003820038200382003820038

Test 4: throughput

Count: 8

Code:

  umax v0.8h, v8.8h, v9.8h
  umax v1.8h, v8.8h, v9.8h
  umax v2.8h, v8.8h, v9.8h
  umax v3.8h, v8.8h, v9.8h
  umax v4.8h, v8.8h, v9.8h
  umax v5.8h, v8.8h, v9.8h
  umax v6.8h, v8.8h, v9.8h
  umax 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)03l1i tlb fill (04)l2 tlb miss instruction (0a)1e3f51schedule 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420049151106340258010010080000100800005006400001200192003820038997339996801002008000020016000020038200381180201100991001008000010000051102161120035800001002003920039200392003920039
802042003815000040258010010080000100800005006400001200192003820038997339996801002008000020016000020038200381180201100991001008000010000051101161120035800001002003920039200392003920039
8020420038150006640258010010080000100800005006400001200192003820038997339996801002008000020016000020038200381180201100991001008000010000051101161120035800001002003920039200392003920039
802042003815000040258010010080000100800005006400001200192003820038997339996801002008000020016000020038200381180201100991001008000010000051101161120035800001002003920039200392003920039
802042003815000040258010010080000100800005006400001200192003820038997339996801002008000020016000020038200381180201100991001008000010000051101161120035800001002003920039200392003920039
802042003815000040258010010080000100800005006400001200192003820038997339996801002008000020016000020038200381180201100991001008000010000051101161120035800001002003920039200392003920039
802042003815000040258010010080000100800005006400001200192003820038997339996801002008000020016000020038200381180201100991001008000010000051101161120035800001002003920039200392003920039
802042003815000040258010010080000100800005006400001200192003820038997339996801002008000020016000020038200381180201100991001008000010000051101161120035800001002003920039200392003920039
8020420038150005440258010010080000100800005006400001200192003820038997339996801002008000020016000020038200381180201100991001008000010000051101161120035800001002003920039200392003920039
8020420038150005740258010010080000100800005006400001200192003820038997339996801002008000020016000020038200381180201100991001008000010000051101161120035800001002003920039200392003920039

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)1e3f51schedule 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)9fl1d cache writeback (a8)accfd2d5map dispatch bubble (d6)dbddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420040150093925800101080000108000050640000012001920038200389996310018800102080000201600002003820038118002110910108000010005020021602220035080000102003920039200392003920039
800242003815002553925800101080000108000050640000002001920038200389996310018800102080000201600002003820038118002110910108000010005020031602220035080000102003920039200392003920039
80024200381501183925800101080000108009950640000012001920038200389996310018800102080000201600002003820038118002110910108000010005020021602320035080000102003920039200392003920039
800242003815002103925800101080000108000050640000012001920038200389996310018800102080000201600002003820038118002110910108000010005020021602320035080000102003920039200392003920039
80024200381500273925800101080000108000050640000012001920038200389996310018800102080000201600002003820038118002110910108000010005020021602220035080000102003920039200392003920039
800242003815003813925800101080000108000050640000012001920038200389996310018800102080000201600002003820038118002110910108000010005020021602220035080000102003920039200392003920039
8002420038150003925800101080000108000050640000012001920038200389996310018800102080000201600002003820038118002110910108000010005020021602220035080000102003920039200392003920039
8002420038150093925800101080000108000050640000012001920038200389996310018800102080000201600002003820038118002110910108000010005020041602220035080000102003920039200392003920039
80024200381500123925800101080000108000050640000012001920038200389996310018800102080000201600002003820038118002110910108000010005020021603320035080000102003920039200392003920039
80024200381500123925800101080000108000050640000012001920038200389996310018800102080000201600002003820038118002110910108000010005020021604220035080000102003920039200392003920039