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

UMAXP (vector, 8H)

Test 1: uops

Code:

  umaxp 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)03181e1f3f4e51schedule 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
10042037150006116872510001000100026468012018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
10042037150006116872510001000100026468012018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
10042037150006116872510001000100026468012018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
10042037150006116872510001000100026468002018203720371572318951000100020002037203711100110001073116111787100020382038203820382038
10042037150008216872510001000100026468002018203720371572318951000100020002037203711100110000973116111787100020382038203820382038
10042037150006116872510001000100026468002018203720371572318951000100020002037203711100110000973116111787100020382038203820382038
10042037150006116872510001000100026468002018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
10042037150006116872510001000100026468002018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
10042037150006116872510001000100026468002018203720371572318951000100020002037203711100110000073116111787100020382038203820382038
10042037150006116872510001000100026468002018203720371572318951000100020002037203711100110000673116111787100020382038203820382038

Test 2: Latency 1->2

Code:

  umaxp 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)0318191e1f3f4e51schedule 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)9fl1d tlb access (a0)l1d tlb miss (a1)l1d cache writeback (a8)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715000006119687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071021622197910100001002003820038200382003820038
102042003715000006119687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000003071021622197910100001002003820038200382003820038
102042003715000006119687251010010010036100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000010071021622197910100001002003820038200382003820038
1020420037150000025119687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071021622197910100001002003820038200382003820038
102042003715000006119687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071021622197910100001002003820038200382003820038
102042003715000006119687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071021622197910100001002003820038200382003820038
102042003715000006119687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071021622197910100001002003820038200382003820038
102042003715000006119687981010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000020071021622197910100001002003820038200382003820038
102042003715000006119687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000003071021622197910100001002003820038200382003820038
102042003715000006119687251010010010000100100005002847680200182003720037184223187451010020010000200200002003720037111020110099100100100001000000071021622197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

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)6061696d6emap 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)accfd0d5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
100242003715506119687251001010100001010000502847680112001820037200371844431876710010201000020200002003720037111002110910101000010006401216221978510000102003820038200382003820038
1002420037150044119687251001010100001010000502847680112001820037200371844431876710010201000020200002003720037111002110910101000010006401216221978510000102003820038200382003820038
1002420037150061196872510010101000010100005028476801120018200372003718444318767100102010000202000020037200371110021109101010000104306401216221978510000102003820038200382003820038
100242003715006119687251001010100001010000502847680112001820037200371844431876710010201000020200002003720037111002110910101000010006401216221978510000102003820038200382003820038
100242003715006119687251001010100001010000502847680112001820037200371844431876710010201000020200002003720037111002110910101000010006401216221978510000102003820038200382003820038
100242003715006119687251001010100001010000502847680112001820037200371844431876710010201000020200002003720037111002110910101000010006401216221978510000102003820038200382003820038
100242003715006119687251001010100001010000502847680112001820037200371844431876710010201000020200002003720037111002110910101000010006401216221978510000102003820038200382003820038
100242003715006119687251001010100001010000502847680112001820037200371844431876710010201000020200002003720037111002110910101000010006401216221978510000102003820038200382003820038
100242003715006119687251001010100001010000502847680112001820037200371844431876710010201000020200002003720037111002110910101000010036401216221978510000102003820038200382003820038
100242003715006119687251001010100001010000502847680112001820037200371844431876710010201000020200002003720037111002110910101000010006400216221978510000102003820038200382003820038

Test 3: Latency 1->3

Code:

  umaxp 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)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)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715000061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001001007102162219791100001002003820038200382003820038
102042003715000061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000027102242219791100001002003820038200382003820038
10204200371500010461196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000007102162219791100001002003820038200382003820038
1020420037150012061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000007102162219791100001002003820038200382003820038
102042003715000061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000007102162219791100001002003820038200382003820038
102042003715000061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000007102162219791100001002003820038200382003820038
102042003715001206119687251010010010000100100005002847680020018200372003718422318745101002001000020020000200372003711102011009910010010000100012007102162219791100001002003820038200382003820038
102042003715000061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000007102162219791100001002003820038200382003820038
102042003715000061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000007102162219791100001002003820038200382003820038
102042003715000061196872510100100100481001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000007102162219791100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

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)6061696d6emap 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)accdcfd0d5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002420037150061196652510010121000010100005028476801020018200372003718444318767100102010000202000020037200371110021109101010000100006400216221978510000102003820038200382003820038
100242003715001032196872510010101000010100005028476800020018200372003718444318767100102010000202000020037200371110021109101010000100006400216221978510000102003820038200382003820038
1002420037150061196872510010101000010100005028476801020018200372003718444318767100102010000202000020037200371110021109101010000100006400216221978510000102003820038200382003820038
100242003715006119687251001010100001010000502847680102001820037200371844431876710010201000020200002003720037111002110910101000010012006400216221978510000102003820038200382003820038
1002420037150061196872510010101000010100005028476801020018200372003718444318767100102010000202000020037200371110021109101010000100006400216221978510000102003820038200382003820038
10024200371499948196872510010101000010100005028476801020018200372003718444318767100102010000202000020037200371110021109101010000102006400216221978510000102003820038200382003820038
100242003715006119687251001010100001010000502847680102001820037200371844431876710010201000020200002003720037111002110910101000010011406400216221978510000102003820038200382003820038
1002420037150061196872510010101000010100005028476800020018200372003718444318767100102010000202000020037200841110021109101010000100006400216221978510000102003820038200382003820038
1002420037150061196872510010101000010100005028476801020018200372003718444318767100102010000202000020037200371110021109101010000100006400216221978510000102003820038200382003820038
1002420037150061196872510010101000010100005028476800020018200372003718444318767100102010000202000020037200371110021109101010000100006400216221978510000102003820038200382003820038

Test 4: throughput

Count: 8

Code:

  umaxp v0.8h, v8.8h, v9.8h
  umaxp v1.8h, v8.8h, v9.8h
  umaxp v2.8h, v8.8h, v9.8h
  umaxp v3.8h, v8.8h, v9.8h
  umaxp v4.8h, v8.8h, v9.8h
  umaxp v5.8h, v8.8h, v9.8h
  umaxp v6.8h, v8.8h, v9.8h
  umaxp 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)3f51schedule 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042003815004025801001008000010080000626640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000051103161120035800001002003920039200392003920039
80204200381500402580100100800001008000050064000012001920038200389973399968010020080000200160000200382003811802011009910010080000100011451101161120035800001002003920039200392003920039
802042003815004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000051101161120035800001002003920039200392003920039
802042003815004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000351101161120035800001002003920039200392003920039
802042003815004025801001008000012580000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000051101161120035800001002003920039200392003920039
802042003815004025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000051101161120035800001002003920039200392003920039
802042003815008225801001008000012580000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000051101161120035800001002003920039200392003920039
802042003815004025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000051101161120035800001002003920039200392003920039
802042003815004025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000051101161120035800001002003920039200392003920039
802042003815004025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000051101161120035800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03mmu table walk data (08)09l2 tlb miss instruction (0a)l2 tlb miss data (0b)18191e1f3f51schedule 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)9fl1d tlb miss (a1)ld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)a9acc2branch mispred nonspec (cb)cfd5map dispatch bubble (d6)daddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200391500000000010225800101080000108000050640000200192003820038999631001880010208000020160000200382003811800211091010800001000000000502091608920035080000102003920039200392003920039
80024200381500000000010425800101080000108000050640000200192003820038999631001880010208000020160000200382003811800211091010800001000000000502061607620035080000102003920039200392003920039
800242003815000000000125258001010800001080000506400002001920038200389996310018800102080000201600002003820038118002110910108000010000000005020816071120035080000102003920039200392003920039
8002420038150000000003925800101080000108000050640000200192003820038999631001880010208000020160000200382003811800211091010800001000000000502091608820035080000102003920039200392003920039
8002420038150000000003925800101080000108000050640000200192003820038999631001880010208000020160000200382003811800211091010800001000010000502081606720035080000102003920039200392003920039
8002420038150000000003925800101080000108000050640000200192003820038999631001880010208000020160000200382003811800211091010800001000020300502081608620035080000102003920039200392009020039
8002420038150000000003925800101080000108000050640000200192003820038999631001880010208000020160000200382003811800211091010800001000000471005054111606820035080000102003920039200392003920039
80024200381500000000039258001010800001080000506400002001920038200381000531004580010208000020160000200382003811800211091010800001000100000502091609720035080000102003920039200392003920039
80024200381500000001203925800101080000108000050640000200192003820038999631001880010208000020160000200382003811800211091010800001000000000502071606920035080000102003920039200392003920039
8002420038150000000003925800101080000108000050640000200192003820038999631001880010208000020160000200382003811800211091010800001000000000502061607820035080000102003920039200392003920039