Apple M1 Microarchitecture Research by Dougall Johnson

Firestorm: Overview | Base Instructions | SIMD and FP Instructions
Icestorm:  Overview | Base Instructions | SIMD and FP Instructions

DUP (element, scalar, D)

Test 1: uops

Code:

  dup d0, v0.d[1]
  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 (01)cycle (02)031e3f4e51inst issue (52)~issue fp/simd (54)~dispatch fp/simd (57)huge thing fp/simd (5b)60696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op fp/simd (7e)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst neon or fp (9a)a8cfd5d6ddinst fetch restart (de)e0? fp/simd (ee)f5f6f7f8fd
100420371531241686251000100010002645211201820372037157131895100010001000203720371110011000073116111786100020382038203820382038
10042037150611686251000100010002645211201820372037157131895100010001000203720371110011000073116111786100020382038203820382038
10042037150611686251000100010002645211201820372037157131895100010001000203720371110011000073116111786100020382038203820382038
10042037150611686251000100010002645211201820372037157131895100010001000203720371110011000073116111786100020382038203820382038
10042037160611686251000100010002645211201820372037157131895100010001000203720371110011000073116111786100020382038203820382038
10042037150611686251000100010002645211201820372037157131895100010001000203720371110011000073116111786100020382038203820382038
10042037150611686251000100010002645211201820372037157131895100010001000203720371110011000173116111786100020382038203820382038
10042037150611686251000100010002645211201820372037157131895100010001000203720371110011000073116111786100020382038203820382038
10042037150611686251000100010002645211201820372037157131895100010001000203720371110011000073116111786100020382038203820382038
10042037150611686251000100010002645211201820372037157131895100010001000203720371110011000073116111786100020382038203820382038

Test 2: Latency 1->2

Code:

  dup d0, v0.d[1]
  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 (01)cycle (02)030b181e3a3f4e51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)60696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa0a1a8accfd5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
102042003715000016119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
102042003715000006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
1020420037150000025119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
102042008415000006119664251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
1020420037150000053519686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
1020420037150000028319686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
1020420037150000025119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
102042003715000006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
102042003715000006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
102042003715000006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire (01)cycle (02)030818191e3f4e51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)60696b6d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa8accdcfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
100242003715000006119686251001010100001010000502848785020018020037200371844331876710010201000020100002003720037111002110910101000010000640216221978610000102003820038200382003820038
100242003715000006119686251001010100001010000502847521020018020037200371844331876710010201000020100002003720037111002110910101000010000640216221978610000102003820038200382003820038
100242003715000006119686251001010100001010000502847521020018020037200371844331876710010201000020100002003720037111002110910101000010000640216221978610000102003820038200382003820038
100242003715010006119686251001010100001010000502847521020018020037200371844331876710010201000020100002003720037111002110910101000010000640224221978610000102003820038200382003820038
1002420037150000010319686251001010100001010000502847521020018020037200371844331876710010201000020100002003720037111002110910101000010030640216221978610000102003820038200382003820038
1002420037150000010519686251001010100001010000502847521020018020037200371844331876710010201000020100002003720037111002110910101000010000640216221978610000102003820038200382003820038
1002420037150000126119686251001010100001010000502847521020018020037200371844331876710010201000020100002003720037111002110910101000010000640216221978610000102003820038200382003820038
100242003715000006119686251001010100001010000502847521020018020037200371844331876710010201000020100002003720037111002110910101000010000640216221978610000102003820038200382003820038
100242003715000006119686251001010100001010000502847521020018020037200371844331876710010201000020100002003720037111002110910101000010200640216221978610000102003820038200382003820038
100242003715000006119686251001010100001010000502847521020018020037200371844331876710010201000020100002003720037111002110910101000010000640216221982210000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  dup d0, v8.d[1]
  dup d1, v8.d[1]
  dup d2, v8.d[1]
  dup d3, v8.d[1]
  dup d4, v8.d[1]
  dup d5, v8.d[1]
  dup d6, v8.d[1]
  dup d7, v8.d[1]
  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 (01)cycle (02)03191e3f51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)60696b6d6edispatch stall (70)72scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa6a8acc5branch mispredict (cb)cdcfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
802042005715000712580108100800081008002050064013202001902003820038997706998980120200800322008003220038200381180201100991001008000010000311151182162120035800001002003920039200392003920039
802042003815000292580108100800081008002050064013212001902003820038997706998980120200800322008003220038200381180201100991001008000010000011151182161220035800001002003920039200392003920039
802042003815000292580108100800081008002050064013212001902003820038997706998980120200800322008003220038200381180201100991001008000010000011151182162220035800001002003920039200392003920039
802042003815000292580108100800081008002050064013212001902003820038997706998980120200800322008003220038200381180201100991001008000010000011151182162220035800001002003920039200392003920039
802042003815000712580108100800081008002050064013212001902003820038997706998980120200800322008003220038200381180201100991001008000010000011151181161220035800001002003920039200392003920039
802042003815000502580108100800081008002050064013202001902003820038997706998980120200800322008003220038200381180201100991001008000010000011151182162120035800001002003920039200392003920039
802042003815000292580108100800081008002050064013212001902003820038997706998980120200800322008003220038200381180201100991001008000010000011151182162220035800001002003920039200392003920039
802042003815000292580108100800081008002050064013212001902003820038997706998980120200800322008003220038200381180201100991001008000010000011151181162120035800001002003920039200392003920039
8020420038150002925801081008000810080020500640132020019020038200389977069989801202008003220080032200382003811802011009910010080000100026311151181161220035800001002003920039200392003920039
802042003815000292580108100800081008002050064013212001902003820038997706998980120200800322008003220038200381180201100991001008000010001011151182162120035800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire (01)cycle (02)030708090a0b18191e1f3a3f51inst issue (52)~issue int (53)~issue fp/simd (54)~dispatch int (56)~dispatch fp/simd (57)huge thing int (59)huge thing fp/simd (5b)696d6edispatch stall (70)scheduler rewind (75)scheduler stall (76)~dispatch op (78)~map op int (7c)~map op fp/simd (7e)~map lookup int (7f)~map lookup fp/simd (81)8283pipeline redirect (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst b.cc (94)inst integer (97)inst neon or fp (9a)9fa0a1a7a8a9acc2branch mispredict (cb)cdcfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
8002420039150000000000040925800101080000108000050640000200192003820038999631001880010208000020800002003820038118002110910108000010000000000502024161372003580000102003920039200392003920039
80024200381500000000000602580010108000010800005064000020019200382003899963100188001020800002080000200382003811800211091010800001000000000050208161382003580000102003920039200392003920039
80024200381500000000000602580010108000010800005064000020019200382003899963100188001020800002080000200382003811800211091010800001000010000050201216982003580000102003920039200392003920039
8002420038150000000000039258001010800001080000506400002001920038200389996310018800102080000208000020038200381180021109101080000100000000005020916962003580000102003920039200392003920039
800242003815000000000006025800101080000108000050640000200192003820038999631001880010208000020800002003820038118002110910108000010000000000502010167122003580000102003920039200392003920039
8002420038150000000000081258001010800001080000506400002001920038200389996310018800102080000208000020038200381180021109101080000100003062005020111612112003580000102003920039200392003920039
80024200381500000000000301258001010800001080000506400002001920038200389996310018800102080000208000020038200381180021109101080000100000000005020816672003580000102003920039200392003920039
80024200381490000000000392580010108000010800005064000020019200382003899963100188001020800002080000200382003811800211091010800001000010000050208161192003580000102003920039200392003920039
8002420038150000000000039258001010800001080000506400002001920038200389996310018800102080000208000020038200381180021109101080000100000000005020516582003580000102003920039200392003920039
8002420038150000000000039258001010800001080000506400002001920038200389996310018800102080000208000020038200381180021109101080000100000000005020516772003580000102003920039200392003920039