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

UQSHL (vector, 8B)

Test 1: uops

Code:

  uqshl v0.8b, v0.8b, v1.8b
  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)03l1i tlb fill (04)1e3a3f4e51schedule 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
10042037150028216872510001000100026468012018203720371572318951000100020002037203711100110000077416441787100020382038203820382038
10042037161028216872510001000100026468002018203720371572318951000100020002037203711100110000677416441787100020382038203820382038
10042037161028216872510001000100026468002018203720371572318951000100020002084203711100110004077416441787100020382038203820382038
100420371511228216872510001000100026468002018203720371572318951000100020002037203711100110000677416441787100020382038203820382038
10042037151028216872510001000100026468002018203720371572318951000100020002037203711100110000077416441787100020382038203820382038
10042037151028216872510001000100026468012018203720371572318951000100020002037203711100110000077416441787100020382038203820382038
100420371510282168725100010001000264680120182037203715723189510001000200020372037111001100004277416441787100020382038203820382038
10042037151028216872510001000100026468002018203720371572318951000100020002037203711100110000077416441787100020382038203820382038
10042037150028216872510001000100026468002018203720371572318951000100020002037203711100110000077416441787100020382038203820382038
10042037151028216872510001000100026468002018203720371572318951000100020002037203711100110000077416441787100020382038203820382038

Test 2: Latency 1->2

Code:

  uqshl v0.8b, v0.8b, v1.8b
  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)031f3f4e51schedule 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? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204200371500283196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000071021622197910100001002003820038200382003820038
10204200371500149196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001001071021622197910100001002003820038200382003820038
1020420037150084196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001001071021622197910100001002003820038200382003820038
10204200371500666196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000071021622198590100001002003820038200382003820038
10204200371500172196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000071021622197910100001002003820038200382003820038
1020420037150061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000071021622197910100001002003820038200382003820038
1020420037150061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000071021622197910100001002003820038200382003820038
1020420037150061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000071021622197910100001002003820038200382003820038
10204200371500170196872510100100100001001000050028476800200182003720037184223187451010020010180200200002003720037111020110099100100100001000071021622197910100001002003820038200382003820038
102042003715001471968725101001001000010010000500284768002001820037200371842231874510100200100002002000020037200371110201100991001001000010039071021622197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03mmu table walk data (08)l2 tlb miss data (0b)18191e1f3f4e51schedule 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)6061696b6d6emap 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)a9acc2cdcfd0d2d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
100242003715000000014519687251001010100001010000502847680002001802003720037184443187671001020100002020000200372003711100211091010100001000000000640002162219785010000102003820038200382003820038
100242003715000000054219687251001010100001010000502847680002001802003720037184443187671001020100002020000200372003711100211091010100001000000000640002162219785010000102003820038200382003820038
10024200371500000006119687251001010100001010000502847680002001802003720037184563187671001020100002020338200372008411100211091010100001000000000640002162219785010000102003820038200382003820038
1002420037150000042012419687251001010100001010000502847680002001802003720037184443187671001020100002020000200372003711100211091010100001000000000640002162219785010000102003820038200382003820038
10024200371500000006119687251001010100001010000502847680002001802003720037184443187671001020100002020000200372003711100211091010100001000000000640002162219785010000102003820038200382003820038
10024200371500000006119687251001010100001010000502847680002001802003720037184443187671001020100002020000200372003711100211091010100001000000000640002162219785010000102003820038200382003820038
10024200371500000006119687251001010100001010000502847680002001802003720037184443187671001020100002020000200372003711100211091010100001000010300640002162219785010000102003820038200382003820038
10024200371500000006119687251001010100001010000502847680002001802003720037184443187671001020100002020000200372003711100211091010100001000000000640002162219785010000102003820038200382003820038
10024200371500000006119687251001010100001010000502847680002001802003720037184443187671001020100002020000200372003711100211091010100001000000300640002162219785010000102003820038200382003820038
100242003715000000029819687251001010100001010000502847680002001802003720037184443187671001020100002020000200372003711100211091010100001000000000640002162219785010000102003820038200382003820038

Test 3: Latency 1->3

Code:

  uqshl v0.8b, v1.8b, v0.8b
  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)03l2 tlb miss data (0b)1e3f4e51schedule 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? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204200371500061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715009361196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
10204200371500661196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007801161119791100001002003820038200382003820038
10204200371500061196872510112100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
10204200371500452710196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000007101161119791100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03l2 tlb miss data (0b)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)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)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
100242003715000061196872510010101000010100005028476802001820037200371844403187671001020100002020000200372003711100211091010100001000006402162219785010000102003820038200382003820038
100242003715009061196872510010101000010100005028476802001820037200371844403187671001020100002020000200372003711100211091010100001000006402162219785010000102003820038200382003820038
100242003715000061196872510010101000010100005028476802001820037200371844403187671001020100002020000200372003711100211091010100001000006402162219785010000102003820038200382003820038
100242003715000061196872510010101000010100005028476802001820037200371844403187671001020100002020000200372003711100211091010100001000006402162219785210000102003820038200382003820038
10024200371500480108251196872510010101000010100005028476802001820037200371844403187671001020100002020000200372003711100211091010100001000006402162219785010000102003820038200382003820038
100242003715000061196872510010101000010100005028476802001820037200371844403187671001020100002020000200372003711100211091010100001000006422162219787010000102003820038200382003820038
100242003714900061196872510010101000010100005028476802001820037200371844403187671001020100002020000200372003711100211091010100001000006422162219785010000102003820038200382003820038
100242003715000061196872510010101000010100005028476802001820037200371844403187671001020100002020000200372003711100211091010100001000006402162219785010000102003820038200382003820038
100242003715000061196872510010101000010100005028476802001820037200371844403187671001220100002020000200372003711100211091010100001000006422163219785010000102003820038200382003820038
1002420037150045061196872510010101000010100005028476802001820037200371844403187671001020100002020000200372003711100211091010100001000006403164319787210000102003820038200382003820038

Test 4: throughput

Count: 8

Code:

  uqshl v0.8b, v8.8b, v9.8b
  uqshl v1.8b, v8.8b, v9.8b
  uqshl v2.8b, v8.8b, v9.8b
  uqshl v3.8b, v8.8b, v9.8b
  uqshl v4.8b, v8.8b, v9.8b
  uqshl v5.8b, v8.8b, v9.8b
  uqshl v6.8b, v8.8b, v9.8b
  uqshl v7.8b, v8.8b, v9.8b
  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)0318191e1f3f51schedule 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 cache writeback (a8)acc2cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042006015000004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000000051103161120035800001002003920039200392003920039
8020420038150001804025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000000051101161120035800001002003920039200392003920039
8020420038150001204025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000000051101161120035800001002003920039200392003920039
802042003815000004025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000000051101161120035800001002003920039200392003920039
802042003815000004025801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000000051101161120035800001002003920039200392003920039
8020420038150000040258010010080000100800005006400000200192003820038997331002280100200800002001600002003820038118020110099100100800001000100051101161120035800001002003920039200392003920039
802042003815000004025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000000051101161120035800001002003920039200392003920039
802042003815000604025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000000051101161120035800001002003920039200392003920039
802042003815000004025801001008000010080000500640000020019200382003899733999680100200800002001600002003820038118020110099100100800001000000051101161120035800001002003920039200392003920039
8020420038150000051525801001008000010080000500640000120019200382003899733999680100200800002001600002003820038118020110099100100800001000000051101161120035800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03l1i tlb fill (04)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)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)accfd0d2l1i tlb miss demand (d4)d5map dispatch bubble (d6)ddfetch restart (de)e0eb? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200471500339258001010800001080000506400000020019200392003899963100188001020800002016000020038200381180021109101080000100050210011616171720035080000102003920039200392003920039
80024200381500039258001010800001080000506400000020019200502003899963100188001020800002016000020038200381180021109101080000100050210011616171620035080000102003920039200392003920039
80024200381501213925800101080000108000050640000002001920039200389996310018800102080000201600002003820038118002110910108000010005021001171691720035080000102003920039200392003920039
80024200381501039258001010800001080000506400000020019200502003899963100188001020800002016000020038200381180021109101080000100050210011716171720035080000102003920039200392003920039
80024200381501039258001010800001080000506400000020019200502003899963100188001020800002016000020038200381180021109101080000100050210011716171820035080000102003920039200392003920039
8002420038150150439258001010800001080000506400000020019200392003899963100188001020800002016000020038200381180021109101080000100050720011716151720035080000102003920039200392003920039
8002420038150103925800101080000108009950640000002001920039200389996310018800102080000201600002003820038118002110910108000010005021001131616920035080000102003920039200392003920039
80024200381501039258001010800001080000506400000020019200502003899963100188001020800002016000020038200381180021109101080000100050210011716101720035080000102003920039200392003920039
80024200381501039258001010800001080000506400000020019200392003899963100188001020800002016000020038200381180021109101080000100050210011816171720035080000102003920039200392003920039
80024200381501639258001010800001080000506400000020019200502003899963100188001020800002016000020038200381180021109101080000100050210011716171720035080000102003920039200392003920039