Apple M1 Microarchitecture Research by Dougall Johnson

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

FCMGT (vector, 4S)

Test 1: uops

Code:

  fcmgt v0.4s, v0.4s, v1.4s
  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)cfd5d6ddinst fetch restart (de)e0? fp/simd (ee)f5f6f7f8fd
10042037150105168725100010001000264680020182037203715723189510001000200020372037111001100073116111787100020382038203820382038
1004203715061168725100010001000264680020182037203715723189510001000200020372037111001100073116111787100020382038203820382038
1004203715061168725100010001000264680020182037203715723189510001000200020372037111001100073116111787100020382038203820382038
1004203715061168725100010001000264680120182037203715723189510001000200020372037111001100073116111787100020382038203820382038
1004203715061168725100010001000264680120182037203715723189510001000200020372037111001100073116111787100020382038203820382038
1004203715061168725100010001000264680020182037203715723189510001000200020372037111001100073116111787100020382038203820382038
1004203715061168725100010001000264680120182037203715723189510001000200020372037111001100073116111787100020382038203820382038
1004203715061168725100010001000264680020182037203715723189510001000200020372037111001100073116111787100020382038203820382038
1004203716061168725100010001000264680020182037203715723189510001000200020372037111001100073116111787100020382038203820382038
1004203715082168725100010001000264680020182037203715723189510001000200020372037111001100073116111787100020382038203820382038

Test 2: Latency 1->2

Code:

  fcmgt v0.4s, v0.4s, v1.4s
  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)031e1f3f4e51inst 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)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)9fa8accfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
102042003715045061196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100007102161119791100001002003820038200382003820038
1020420037150468061196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
102042003715012061196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037150120726196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
102042003715024061196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
10204200371503917661196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
10204200371499061196872510100100100001001000050028476801200182003720037184220318745101002001000020020334200372003711102011009910010010000100037101161119791100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476801200182003720037184220318745101002001000020020000200372003711102011009910010010000100007101161119791100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire (01)cycle (02)0318191e1f3f4e51inst 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)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)9fa0a1a8a9accfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
100242003715000540611968725100101010000101000050284768012001820037200371844403187671001020100002020000200372003711100211091010100001000000640216221978510000102003820038200382003820038
100242003715000210611968725100101010000101000050284768012001820037200371844403187671001020100002020000200372003711100211091010100001000000640216221978510000102003820038200382003820038
10024200371500300611968725100101010000101000050284768012001820037200371844403187671001020100002020000200372003711100211091010100001002000640216221978510000102003820038200382003820038
10024200371500000611968725100101010000101000050284768012001820037200371844403187671001020100002020000200372003711100211091010100001000000640216221978510000102003820038200382003820038
10024200371500000611968725100101010000101000050284768012001820037200371844403187671001020100002020000200372003711100211091010100001000000640216221978510000102003820038200382003820038
10024200371500000611968725100101010000101000050284768012001820037200371844403187671001020100002020000200372003711100211091010100001000000640216221978510000102003820038200382003820038
10024200371500000611968725100101010000101000050284768012001820037200371844403187671001020100002020000200372003711100211091010100001000000640216221978510000102003820038200382003820038
10024200371500000611968725100101010000101000050284768012001820037200371844403187671001020100002020000200372003711100211091010100001000000661216221978510000102008420086200862008520038
10024200371501100611968725100101110000101000050284768012001820037200371844403187671001020100002020000200372003711100211091010100001000000662224321978510000102008620085200382003820038
10024200371500000611968725100101010000101000060284896312001820037200371844403187671001020100002020000200372003711100211091010100001000020640216221978510000102003820038200382003820038

Test 3: Latency 1->3

Code:

  fcmgt v0.4s, v1.4s, v0.4s
  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)030b1e3f4e51inst 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)9fa0a6a8a9accfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
1020420037150008219687251010010010000100100005002847680020018200372003718422318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
1020420037150006119687251010010010000100100005002847680020018200372003718422318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001000019207101161119791100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476800200182003720037184223187451010020010000200200002003720037111020110099100100100001004034037101161119791100001002003820038200382003820038
1020420037150006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100001007101161119791100001002003820038200382003820038
10204200371500072619687251010010010000100100005002847680020018200372003718422318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
1020420037149006119687251010010010000100100005002847680020018200372003718422318745101002001000020020000200372003711102011009910010010000100001037101161119791100001002003820038200382003820038
10204200371500061196872510100100100001001000050028476801200182003720037184223187451010020010000200200002003720037111020110099100100100001000059037101161119791100001002003820038200382003820038
1020420037150006119687251010010010000100100005002847680120018200372003718422318745101002001000020020000200372003711102011009910010010000100000007101161119791100001002003820038200382003820038
1020420037150006119687251010010010000100100005002847680020018200372003718422318745101002001000020020000200372003711102011009910010010000100000037101161119791100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire (01)cycle (02)0318191e3f4e51inst 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)9fa8acbranch mispredict (cb)cdcfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
100242003715000061196872510010101000010100005028476801200182003720037184443187671001020100002020000200372003711100211091010100001037000640316221978510000102003820038200382003820038
10024200371500006119687251001010100001010000502847680020018200372003718444318767100102010000202000020084200371110021109101010000101000640216221978510000102003820038200382003820038
10024200371500006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100000640216221978510000102003820038200382003820038
10024200371500006119687251001010100001010000502847680120018200372003718444318767100102010000202000020037200371110021109101010000101000640216221978510000102003820038200382003820038
10024200371500006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100000640216221978510000102003820038200382003820038
100242003715000072619687441001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100000640216221978510000102003820038200382003820038
10024200371500006119687251001010100001010000502847680120018200372003718444318767100102010000202000020037200371110021109101010000100000640216221978510000102003820038200382003820038
10024200371500006119687251001010100001010000502847680120018200372003718444318767100102010000202000020037200371110021109101010000102300640216221978510000102003820038200382003820038
10024200371500006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100000640216221978510000102003820038200382003820038
10024200371500006119687251001010100001010000502847680020018200372003718444318767100102010000202000020037200371110021109101010000100000640216221978510000102003820038200382003820038

Test 4: throughput

Count: 8

Code:

  fcmgt v0.4s, v8.4s, v9.4s
  fcmgt v1.4s, v8.4s, v9.4s
  fcmgt v2.4s, v8.4s, v9.4s
  fcmgt v3.4s, v8.4s, v9.4s
  fcmgt v4.4s, v8.4s, v9.4s
  fcmgt v5.4s, v8.4s, v9.4s
  fcmgt v6.4s, v8.4s, v9.4s
  fcmgt v7.4s, v8.4s, v9.4s
  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 (01)cycle (02)031e3f5051inst 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)9fa6a8accfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
802042005915104002580100100800001008000050064000012001902003820038997339996801002008000020016000020038200381180201100991001008000010001051104161120035800001002003920039200392003920039
802042003815004002580100100800001008000050064000002001902003820038997339996801002008000020016000020038200381180201100991001008000010000051101161120035800001002003920039200392003920039
802042003815004002580100100800001008000050064000002001902003820038997339996801002008000020016000020038200381180201100991001008000010001051101161120035800001002003920039200392003920039
8020420038150312602580100100800001008000050064000012001902003820038997339996801002008000020016000020038200381180201100991001008000010001051101161120035800001002003920039200392003920039
802042003815004002580100100800001008000050064000002001902003820038997339996801002008000020016000020038200381180201100991001008000010002351101161120035800001002003920039200392003920039
802042003815004002580100100800001008000050064000002001902003820038997339996801002008000020016000020038200381180201100991001008000010002051101161120035800001002003920039200392003920039
802042003815004002580100100800001008000050064000002001902003820038997339996801002008000020016000020038200381180201100991001008000010000051101161120035800001002003920039200392003920039
802042003815004002580100100800001008000050064000002001902003820038997339996801002008000020016000020038200381180201100991001008000010000051101160120035800001002003920039200392003920039
802042003815004002580100100800001008000050064000002001902003820038997339996801002008000020016000020038200381180201100991001008000010000051101161120035800001002003920039200392003920039
802042003815004002580100100800001008000050064000002001902003820038997339996801002008013620016000020038200381180201100991001008000010000051101161120035800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire (01)cycle (02)0308090b193f51inst 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)9fa8accfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
8002420047150000039258001010800001080000506400002001920038200389996310018800102080000201600002003820048118002110910108000010005020316542003580000102003920039201402003920039
8002420038150000039258001010800001080000506400002001920038200389996310018800102080000201600002003820038118002110910108000010005020316442003580000102003920039200392003920039
8002420038150000039258001010800001080000506400002001920038200389996310018800102080000201600002003820038118002110910108000010005020517552003580000102003920039200392003920039
8002420038150000039258001010800001080000506400002001920038200389996310018800102080000201600002003820038118002110910108000010005020316442003580000102003920039200392003920039
8002420038150000039258001010800001080000506400002001920038200389996310018800102080000201600002003820038118002110910108000010005020216442003580000102003920039200392003920039
8002420038150000039258001010800001080000506400002001920038200389996310018800102080000201600002003820038118002110910108000010005020516342003580000102003920039200392003920039
80024200381500000392580010108000010800005064000020019200382003899963100188001020800002016000020038200381180021109101080000100905020216342003580000102003920039200392003920039
8002420038150000039258001010800001080000506400002001920038200389996310018800102080000201600002003820038118002110910108000010005020316352003580000102003920039200392003920039
8002420038150000039258001010800001080000506400002001920038200389996310018800102080000201602642003820038118002110910108000010005020516552003580000102003920039200392003920039
8002420038150000039258001010800001080000506400002001920038200389996310046800102080000201600002003820038118002110910108000010005020316342003580000102003920039200392003920039