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

UXTL (2D)

Test 1: uops

Code:

  uxtl v0.2d, v0.2s
  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)03191e3f4e51schedule uop (52)schedule simd uop (54)dispatch simd uop (57)ldst uops in schedulers (5b)696d6emap 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 tlb miss (a1)l1d cache writeback (a8)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
10042037150061168625100010001000264521201820372037157131895100010001000203720371110011000000073116111786100020382038203820382038
10042037160061168625100010001000264521201820372037157131895100010001000203720371110011000010073116111786100020382038203820382038
10042037150061168625100010001000264521201820372037157131895100010001000203720371110011000000073116111786100020382038203820382038
10042037160061168625100010001000264521201820372037157131895100010001000203720371110011000000073116111786100020382038203820382038
10042037160061168625100010001000264521201820372037157131895115210001000203720371110011000000073116111786100020382038203820382038
10042037160061168625100010001000264521201820372037157131895100010001000203720371110011000000073116111786100020382038203820382038
10042037160061168625100010001000264521201820372037157131895100010001000203720371110011000000073116111786100020382038203820382038
10042085160061168625100010001000264521201820372037157131895100010001000203720371110011000000073116111786100020382038203820382038
10042037160061168625100010001000264521201820372037157131895100010001000203720371110011000000073116111786100020382038203820382038
10042037160061168625100010001000264521201820372037157131895100010001000203720371110011000000073116111786100020382038203820382038

Test 2: Latency 1->2

Code:

  uxtl v0.2d, v0.2s
  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)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
1020420037155068919686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037155006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037155066119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037155066119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037156006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
10204200371560186119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037156066119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037155006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
10204200371550082819686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037156006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03mmu table walk data (08)181e1f3f4e51schedule 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)a9acst memory order violation nonspec (c4)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024200371550000611968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010040006403162219786010000102003820038200382003820038
10024200371550000611968625100101010000101000050284752102001820037200371844331876710010221000020100002003720037111002110910101000010000006402162219786010000102003820038200382003820038
10024200371600000611968625100101010000101000050284752112001820037201331844331876710010201000020100002003720037111002110910101000010000006402482219786010000102003820038200382003820038
100242003715500007201968625100101010012101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010000006402162219786010000102003820038200382003820038
10024200371550000611968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010000306402162219786010000102003820038200382003820038
10024200371560000611968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010000306402162219786010000102003820038200382003820038
10024201781550000611968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010000006402162219786010000102003820038200382003820038
10024200371550000611968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010200006402162219786010000102003820038200382003820038
10024200371550000611968625100101010000101000050284752102016220037200371844331876710010201000020100002003720037111002110910101000010000006402162219786010000102003820038200382003820038
10024200371560000611968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010000006402162219786010000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  uxtl v0.2d, v8.2s
  uxtl v1.2d, v8.2s
  uxtl v2.2d, v8.2s
  uxtl v3.2d, v8.2s
  uxtl v4.2d, v8.2s
  uxtl v5.2d, v8.2s
  uxtl v6.2d, v8.2s
  uxtl v7.2d, v8.2s
  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)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)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 access (a0)l1d tlb miss (a1)l1d cache writeback (a8)acc2branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0eb? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420057156000029258010810080008100800205006401321200192003820038997706998980120200800322008003220038200381180201100991001008000010000000111511801600200350800001002003920039200392003920039
8020420038155000029258010810080008100800205006401320200192003820038997706998980120200800322008003220038200381180201100991001008000010000000111511801600200350800001002003920039200392003920039
8020420038155000029258010810080008100800205006401321200572003820038997706998980120200800322008003220038200381180201100991001008000010000100111511801600200350800001002003920039200392003920039
8020420038155000029258010810080008100800205006401320200192003820038997706998980120200800322008003220038200381180201100991001008000010000000111511801600200350800001002003920039200392003920039
80204200381550072029258010810080008100800205006401321200192003820038997706998980120200800322008003220038200381180201100991001008000010000000111511801600200350800001002003920039200392003920039
80204200381550012029258010810080008100800205006401321200192003820038997706998980120200800322008003220038200381180201100991001008000010000000111511801600200350800001002003920039200392003920039
802042003815500002925801081008000810080020500640132120019200382003899770699898012020080032200800322003820038118020110099100100800001000010011151180160020035250800001002003920039200392003920039
8020420038161000029258010810080008100800205006401321200192003820038997706998980120200800322008003220038200381180201100991001008000010000000111511801600200350800001002003920039200392003920039
8020420038155000029258010810080008100800205006401320200192003820038997706998980120200800322008003220038200381180201100991001008000010000000111511801600200350800001002003920039200392003920039
8020420038156000029258010810080008100800205006401320200192003820038997706998980120200800322008003220038200381180201100991001008000010000000111511801600200350800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03191e3f51schedule 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
8002420050155003925800101080000108000050640000020019200382003899963100188001020800002080000200382003811800211091010800001000502010169112003580000102003920039200392003920039
80024200381610039258001010800001080000506409200200192003820038999631001880010208000020800002003820038218002110910108000010005020121612102003580000102003920039200392003920039
80024200381550039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010005020111611122003580000102003920039200392003920039
80024200381560039258001010800001080000506400000200192003820038999631001880010208019520800002003820038118002110910108000010005020101610132003580000102003920039200392003920039
800242003815501839258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010005020121611102003580000102003920039200392003920039
80024200381550039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010005020111611112003580000102003920039200392003920039
80024200381550039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010005020101610112003580000102003920039200392003920039
80024200381550039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010005020131610122003580000102003920039200392003920039
80024200381600039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010005020111611102003580000102003920039200392003920039
80024200381550039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010005020111610132003580000102003920039200392003920039