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

SHLL2 (vector, 2D)

Test 1: uops

Code:

  shll2 v0.2d, v0.4s, #32
  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)1e3f4e51schedule 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100420371500611686251000100010002645211201820372037157131895100010001000203720371110011000073216221786100020382038203820382038
100420371500611686251000100010002645211201820372037157131895100010001000203720371110011000073216221786100020382038203820382038
100420371500611686251000100010002645211201820372037157131895100010001000203720371110011000073216221786100020382038203820382038
100420371500611686251000100010002645211201820372037157131895100010001000203720371110011000073216221786100020382038203820382038
100420371500821686251000100010002645211201820372037157131895100010001000203720371110011000073216221786100020382038203820382038
100420371500611686251000100010002645211201820372037157131895100010001000203720371110011000073216221786100020382038203820382038
100420371500611686251000100010002645211201820372037157131895100010001000203720371110011000073216221786100020382038203820382038
100420371500611686251000100010002645211201820372037157131895100010001000203720371110011000073216221786100020382038203820382038
100420371500611686251000100010002645211201820372037157131895100010001000203720371110011000073216221786100020382038203820382038
100420371500611686251000100010002645211201820372037157131895100010001000203720371110011000073216221786100020382038203820382038

Test 2: Latency 1->2

Code:

  shll2 v0.2d, v0.4s, #32
  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)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 cache writeback (a8)a9accdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020420037150001098196862510100100100001001000050028475212001820037200371842131874510100200100002001000020037200371110201100991001001000010000007101161119791100001002003820038200382003820038
102042003715000938196862510100100100001001000050028475212001820037200371842131874510100200100002001000020037200371110201100991001001000010010007101161119791100001002003820038200382003820038
10204200371500061196862510100100100001001000050028475212001820037200371842131874510100200100002001000020037200371110201100991001001000010000007101161119791100001002003820038200382003820038
10204200371500061196862510100100100001001000050028475212001820037200371842131874510100200100002001000020037200371110201100991001001000010010007101161119791100001002003820038200382003820038
10204200371500061196862510100100100001001000050028475212001820037200371842131874510100200100002001000020037200371110201100991001001000010000007101161119791100001002003820038200382003820038
102042003715000170196862510100100100001001000050028475212001820037200371842131874510100200100002001000020037200371110201100991001001000010000007101161119791100001002003820038200382003820038
102042003715000168196862510100100100001001000050028475212001820037200371842131874510100200100002001000020037200371110201100991001001000010000007101161119791100001002003820038200382003820038
10204200371500082196862510100100100001001000050028475212001820037200371842131874510100200100002001000020037200371110201100991001001000010030007101161119791100001002003820038200382003820038
102042003715000124196862510100100100001001000050028475212001820037200371842131874510100200100002001000020037200841110201100991001001000010002307101161119791100001002013320038200382003820038
1020420037150015828196862510100100100001001000050028475212001820037200371842131874510100200100002001000020037200371110201100991001001000010000007101161119791100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03183f4e51schedule 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)st unit uop (a7)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002420037150094719686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
10024200371500138919686251001010100001010000502847521020018200372003718443318785100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
10024200371500106919686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
1002420037149212819686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
1002420037150019119686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000102013640216221978610000102003820038200382003820038
100242003715006119686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100020640216221978610000102003820038200382003820038
1002420037150062019686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
1002420037150023319686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
100242003715006119686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038
100242003715006119686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100000640216221978610000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  shll2 v0.2d, v8.4s, #32
  shll2 v1.2d, v8.4s, #32
  shll2 v2.2d, v8.4s, #32
  shll2 v3.2d, v8.4s, #32
  shll2 v4.2d, v8.4s, #32
  shll2 v5.2d, v8.4s, #32
  shll2 v6.2d, v8.4s, #32
  shll2 v7.2d, v8.4s, #32
  movi v8.16b, 9

(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)031e3f51schedule 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)l1d cache writeback (a8)branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)fetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042003815007125801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392003920039
8020420038150069425801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392003920039
802042003815002925801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392003920039
802042003815002925801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392003920039
802042003815009225801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392003920039
802042003815005225801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392003920039
802042003815002925801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392003920039
8020420038150029258010810080008100800205006401322001920038200389977610023801202008003220080032200382003811802011009910010080000100001115118116020035800001002003920039200392003920039
802042003815002925801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392003920039
802042003815005225801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392003920039

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)5f60696b6d6emap 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)a9acc2cfd2d5map dispatch bubble (d6)dadbddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420051150000000001042580010108000010800005064000001200190200382003899963100188001020800002080000200382003811800211091010800001000000005020013160011620035080000102003920039200392003920039
80024200381500000000039258001010800001080000506400000120019020038200389996310018800102080000208000020038200381180021109101080000100000000502006160010420035080000102003920039200392003920039
80024200381500000000039258001010800001080000506400000120019020038200389996310018800102080000208000020038200381180021109101080000100000000502007160010520035080000102003920039200392003920039
80024200381500000000039258001010800001080000506400000120019020038200389996310018800102080000208000020038200381180021109101080000100000000502004160010520035080000102003920039200392003920039
8002420038150000000003925800101080000108000050640000012001902003820038999631001880010208000020800002003820038118002110910108000010000000050200616009420035080000102003920039200392003920039
80024200381500000000010225800101080000108000050640000012001902003820038999631001880010208000020800002003820038118002110910108000010000000050200816006720035080000102003920039200392003920039
8002420038150000000002962580010108000010800005064000001200190200382003899963100188001020800002080000200382003811800211091010800001000026030502004160015420035080000102003920039200392003920039
80024200381500000000047525800101080000108000050640000012001902003820038999631001880010208000020800002003820038118002110910108000010000000050200416007420035080000102003920039200392003920039
8002420038150000000003925800101080000108000050640000012001902003820038999631001880010208000020800002003820038118002110910108000010000000050200616009420035080000102003920039200392003920039
80024200381500000000019225800101080000108000050640000012001902003820038999631001880010208000020800002003820038118002110910108000010000000050200616005620035080000102003920039200392003920039