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

UADDW (vector, 8H)

Test 1: uops

Code:

  uaddw v0.8h, v0.8h, 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)03mmu table walk data (08)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
10042037150026616872510001000100026468012018203720371572318951000100020002037203711100110000077416441787100020382038203820382038
100420371500289168725100010001000264680120182037203715723189510001000200020372037111001100002477416441787100020382038203820382038
1004203716002112168725100010001000264680120182037203715723189510001000200020372037111001100001577416441787100020382038203820382038
100420371500266168725100010001000264680120182037203715723189510001000200020372037111001100001577416441787100020382038203820382038
10042037150026616872510001000100026468012018203720371572318951000100020002037203711100110000377416441787100020382038203820382038
100420371500266168725100010001000264680120182037203715723189510001000200020372037111001100001277416441787100020382038203820382038
100420371500211016872510001000100026468012018203720371572318951000100020002037203711100110001077416441787100020382038203820382038
10042037150328916872510001000100026468012018203720371572318951000100020002037203711100110000077416441787100020382038203820382038
10042037150026616872510001000100026468012018203720371572318951000100020002037203711100110000077416441787100020382038203820382038
10042037160026616872510001000100026468012018203720371572318951000100020002037203711100110000077416441787100020382038203820382038

Test 2: Latency 1->2

Code:

  uaddw v0.8h, v0.8h, 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)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)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? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715007261968725101001001000010010000500284768020018200372003718422318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
10204200371500611968725101001001000010010000500284768020018200372003718422318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
10204200371500611968725101001001000010010000500284768020018200372003718422318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
10204200371500611968725101001001000010010000500284768020018200372003718422318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
10204200371500611968725101001001000010010000500284768020018200372003718422318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
10204200371500611968725101001001000010010000500284768020018200372003718422318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
10204200371500611968725101001001000010010000500284768020018200372003718422318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
10204200371500611968725101001001000010010000500284768020018200372003718422318745101002001000020020000200372003711102011009910010010000100008007101161119791100001002003820038200382003820038
10204200371500611968725101001001000010010000500284768020018200372003718422318765101002001000020020000200372003711102011009910010010000100000037101161119791100001002003820038200382003820038
10204200371500611968725101001001000010010000500284768020018200372003718422318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03181e3f4e51schedule 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 miss (a1)st unit uop (a7)l1d cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024200371500061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000000640216221978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000000640216221978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000000640216221978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000300640216221978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000200640216221978510000102003820038200382003820038
10024200371500089196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000400640216221978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000300640216221978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000103640216221978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000100640216221978510000102003820038200382003820038
10024200371500061196872510010101000010100005028476800200182003720037184443187671001020100002020000200372003711100211091010100001000000640216221978510000102003820038200382003820038

Test 3: Latency 1->3

Code:

  uaddw v0.8h, v1.8h, 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)0318191e3f4e51schedule 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 tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)acc2cdcfd0d2d5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715000961196872510100100100001001000050028476801020018200372003718422318745101002001000020020000200372003711102011009910010010000100000000710002162219791100001002003820038200382003820038
102042003715000061196872510100100100001001000050028476801020018200372003718422318745101002001000020020000200372003711102011009910010010000100000000710002162219791100001002003820038200382003820038
102042003715000061196872510100100100001001000050028476801020018200372003718422318745101002001000020020000200372003711102011009910010010000100000000710002162219791100001002003820038200382003820038
1020420037150000611968725101001001000010010000500284768010200182003720037184223187451010020010000200200002003720037111020110099100100100001002034300710002162219791100001002003820038200382003820038
1020420037150000251196872510100100100001001000050028476801020018200372003718422318745101002001000020020000200372003711102011009910010010000100000000710002162219791100001002003820038200382003820038
102042003715000061196872510100100100001001000050028476801020018200372003718422318745101002001000020020000200372003711102011009910010010000100000000710002162219791100001002003820038200382003820038
102042003715000061196872510100100100001001000050028476800020018200372003718422318745101002001000020020000200372003711102011009910010010000100000000710002162219791100001002003820038200382003820038
102042003715000061196872510100100100001001000050028476801020018200372003718422318745101002001000020020000200372003711102011009910010010000100000000710002162219791100001002003820038200382003820038
102042003715000061196872510100100100001001000050028476800020018200372003718422318745101002001000020020000200372003711102011009910010010000100021000710002162219791100001002003820038200382003820038
102042003715000061196872510100100100001001000050028476800020018200372003718422318745101002001000020020000200372003711102011009910010010000100001000710002162219791100001002003820038200382003820038

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)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
10024200371500103196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001003640316221978510000102003820038200382003820038
10024200371500170196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
1002420037150061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
10024200371500124196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
10024200371500168196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
1002420037150084196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
10024200371500105196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
1002420037150061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
1002420037150061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038
10024200371500441196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001000640216221978510000102003820038200382003820038

Test 4: throughput

Count: 8

Code:

  uaddw v0.8h, v8.8h, v9.8b
  uaddw v1.8h, v8.8h, v9.8b
  uaddw v2.8h, v8.8h, v9.8b
  uaddw v3.8h, v8.8h, v9.8b
  uaddw v4.8h, v8.8h, v9.8b
  uaddw v5.8h, v8.8h, v9.8b
  uaddw v6.8h, v8.8h, v9.8b
  uaddw v7.8h, v8.8h, 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)03l2 tlb miss data (0b)181e3f51schedule 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)9fst unit uop (a7)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420038150000386258010010080000100800005006400000200192003820038997339996801002008000020016000020038200381180201100991001008000010000051104162320035800001002003920039200392003920039
802042003815000061258010010080000100800005006400000200192003820038997339996801002008000020016000020038200381180201100991001008000010000051103162320035800001002003920039200392003920039
8020420038150000191258010010080000100800005006400000200192003820038997339996801002008000020016000020038200381180201100991001008000010000051103163220035800001002003920039200392003920039
802042003815000040258010010080000100800005006400000200192003820038997339996801002008000020016000020038200381180201100991001008000010000051103163320035800001002003920039200392003920039
802042003815000040258010010080000100800005006400000200192003820038997339996801002008000020016000020038200381180201100991001008000010010051103163220035800001002003920039200392003920039
80204200381500001517258010010080000100800005006400000200192003820038997339996801002008000020016000020038200381180201100991001008000010001051103163220035800001002003920039200392003920039
802042003815010040258010010080000100800005006400000200192003820038997339996801002008000020016000020038200381180201100991001008000010000051103163320035800001002003920039200392003920039
8020420038150000524258010010080000100800005006400000200192003820038997339996801002008000020016000020038200381180201100991001008000010002051102162320035800001002003920039200392003920039
802042003815000084258010010080000100800005006400000200192003820038997339996801002008000020016000020038200381180201100991001008000010000051103163320035800001002003920039200392003920039
8020420038150000189258010010080000100800005006400000200192003820038997339996801002008000020016000020038200381180201100991001008000010000051103163220035800001002003920039200392003920039

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 data (0b)18191e1f3a3f51schedule 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 miss (a1)ld unit uop (a6)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)dbddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420048150000000006225800101080000108000050640000020019200382003899963100188001020800002016000020038200381180021109101080000100040005020616015320035080000102003920039200392003920039
800242003815000000000324258001010800001080000506400000200192003820038999631001880010208000020160000200382003811800211091010800001002006605020316016520035080000102003920039200392003920039
8002420038150001000003925800101080000108000050640000020019200382003899963100188001020800002016000020038200381180021109101080000100000005020316018520035080000102003920039200392003920039
8002420038150000000003925800101080000108000050640000020019200382003899963100188001020800002016000020038200381180021109101080000100000005020316015520035080000102003920039200392003920039
800242003815000000000392580010108000010800005064000002001920038200389996310018800102080000201600002003820038118002110910108000010000000502051606520035080000102003920039200392003920039
800242003815000000000111325800101080000108000050640000020019200382003899963100188001020800002016000020038200381180021109101080000100000005020516016320035080000102003920039200392003920039
80024200381500000000015125800101080000108000050640000020019200382003899963100188001020800002016000020038200381180021109101080000100000305020516017520035080000102003920039200392003920039
8002420038150000000003925800101080000108000050640000020019200382003899963100188001020800002016000020038200381180021109101080000100000005020516021420035080000102003920039200392003920039
8002420038150000000001252580010108000010800005064000002001920038200389996310018800102080000201600002003820038118002110910108000010000000502041605520035080000102003920039200392003920039
8002420038150000000003925800101080000108000050640000020019200382003899963100188001020800002016000020038200381180021109101080000100000005020516021320035080000102003920039200392003920039