Apple M1 Microarchitecture Research by Dougall Johnson

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

CMGE (zero, 8B)

Test 1: uops

Code:

  cmge v0.8b, v0.8b, #0
  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)03070b1e3f4e51inst 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)a6a8accfd5d6ddinst fetch restart (de)e0? fp/simd (ee)f5f6f7f8fd
100420371500061168625100010001000264521020222037203715713189510001000100020372037111001100000073216111786100020382038203820382038
100420371500061168625100010001000264521020182037203715713189510001000100020372037111001100000073116111786100020382038203820382038
100420371500061168625100010001000264521020182037203715713189510001000100020372037111001100000073116111786100020382038203820382038
100420371500061168625100010001000264521020182037203715703189510001000100020372037111001100000073116111786100020382038203820382038
100420371610061168625100010001000264521120182037203715713189510001000100020372037111001100000073116111786100020382038203820382038
10042037150012061168625100010001000264521020182037203715713189510001000100020372037111001100000073116111786100020382038203820382085
100420371510061168625100010001000264521020182037203715713189510001000100020372037111001100000073116121786100020382038203820382038
100420371500961168625100010001000264521020182037203715713189510001000100020372037111001100000073116111786100020382038203820382038
100420371600061168625100010001000264521020182037203715713189510001000100020372037111001100000073116111786100020382038203820382038
100420371500061168625100010001000264521020182037203715713189510001000100020372037111001100000073116111786100020382038203820382038

Test 2: Latency 1->2

Code:

  cmge v0.8b, v0.8b, #0
  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)031e3f4e51inst 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)9fa0a6a7a8a9accfd5d6ddinst fetch restart (de)e0? int output thing (e9)? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
102042003715027611968625101001001000010010000500284752112001820037200371842131874510100200100002001000020037200371110201100991001001000010000000071011611197910100001002003820038200382003820038
10204200371500611968625101001001000010010000500284752112001820037200371842131874510100200100002001000020037200371110201100991001001000010000000071011611197910100001002003820038200382003820038
102042003715042611968625101001001000010010000500284752112001820037200371842131874510100200100002001000020037200371110201100991001001000010000000071011611197910100001002003820038200382003820038
10204200371500611968625101001001000010010150500284752112001820037200371842131874510100200100002001000020037200371110201100991001001000010000000071011611197910100001002003820038200382003820038
1020420037150510611968625101001001000010010000500284752112001820037200371842131874510100200100002001000020037200371110201100991001001000010000000071011611197910100001002003820038200382003820038
102042003715018611968625101001001000010010000500284752112001820037200371842131874510100200100002001000020037200371110201100991001001000010000000971011611197910100001002003820038200382003820038
102042003715015611968625101001001000010010000500284752112001820037200371842131874510100200100002001000020037200371110201100991001001000010000000071011611197910100001002003820038200382003820038
102042003715027611968625101001001000010010000500284752112001820037200371842131874510100200105002001000020037200841110201100991001001000010000000071011611197910100001002003820038200382003820038
10204200371506611968625101001001000010010000500284752112001820037200371842131874510100200100002001000020037200371110201100991001001000010000000071011611197910100001002003820038200382003820038
10204200371500611968625101001001000010010000500284752112001820037200371842131874510100204100002001000020037200371110201100991001001000010000000071011611197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire (01)cycle (02)030b1e1f3f4e51inst 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)9fa8accfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
1002420037150075061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
1002420037150021061196862510010101000010101526128487850200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
1002420037150021061196862510010101000010100005028475210200182003720037184433187671001020100002010000200852003711100211091010100001003640216221978610000102003820038200382003820038
1002420037150090147196862510010101000010100005028475210200182003720037184433187971001020100002010000200372003711100211091010100001063640216221982210000102003820038200382003820038
1002420037150033061196862510010101000010100005028475211200182003720037184438187671001020100002010000200372003711100211091010100001003640216321978610000102003820038200382003820038
100242003715003061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
1002420037150021061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
10024200371500990124196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
100242003715000061196862510010101000010100005028475210200182003720037184433188411001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
1002420037150012061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  cmge v0.8b, v8.8b, #0
  cmge v1.8b, v8.8b, #0
  cmge v2.8b, v8.8b, #0
  cmge v3.8b, v8.8b, #0
  cmge v4.8b, v8.8b, #0
  cmge v5.8b, v8.8b, #0
  cmge v6.8b, v8.8b, #0
  cmge v7.8b, v8.8b, #0
  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)030918191e1f3f51inst 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)9fa8a9acc5branch mispredict (cb)cdcfd6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
802042006015000000292580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000001115118160020035800001002003920039200392003920039
80204200381500003540292580108100801041008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000001115118160020035800001002003920039200392003920039
8020420038150000150292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000001115118160020035800001002003920039200392003920039
8020420038150000150292580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000001115118160020035800001002003920039200392003920039
802042003815000000292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000001115118160020035800001002003920039200392003920039
8020420038150000240292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000001115118160020035800001002003920039200392003920039
8020420038150000210292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000001115118160020035800001002003920039200392003920039
8020420038150000150292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000001115118160020035800001002003920039200392003920039
8020420038150000902925801081008000810080020500640132120019200382003899771299898012020080032200800322003820038118020110099100100800001000001115118160020035800001002003920039200392003920039
802042003815000030292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000001115118160020035800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire (01)cycle (02)0308090a0b18191e1f3a3f51inst 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)9fa0a1a6a7a8a9acc2cfd5d6ddinst fetch restart (de)e0? fp/simd (ee)gpr retires (ef)f5f6f7f8fd
8002420039150000000360039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010000000005020516572003580000102003920039200392003920039
800242003815000000090039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010000000005020716752003580000102003920039200392003920039
800242003815000000000039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010000000005020516772003580000102003920039200392003920039
800242003815000000000039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010000000005020516572003580000102003920039200392003920039
800242003815000000000039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010000000005020716772003580000102003920039200392003920039
800242003815000000090039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010000000005020516572003580000102003920039200392003920039
800242003815000000060039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010000000005020716572003580000102003920039200392003920039
800242003815000000000039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010000000005020516572003580000102003920039200392003920039
800242003815000000000039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010000000005020716772003580000102003920039200392003920039
800242003815000000000039258001010800001080000506400000200192003820038999631001880010208000020800002003820038118002110910108000010000000005020716752003580000102003920039200392003920039