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

FCMGT (vector, zero, 2D)

Test 1: uops

Code:

  fcmgt v0.2d, v0.2d, #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 uop (01)cycle (02)031e1f3f4e51schedule 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)l1d tlb access (a0)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
10042037150061168625100010001000264521020182037203715713189510001000100020372037111001100000373216111786100020382038203820382038
10042037150061168625100010001000264521020182037203715713189510001000100020372037111001100002073116111786100020382038203820382038
10042037160061168625100010001000264521020182037203715713189510001000100020372037111001100002073116111786100020382038203820382038
10042037160061168625100010001000264521020182037203715713189510001000100020372037111001100000073116111786100020382038203820382038
10042037150061168625100010001000264521020182037203715713189510001000100020372037111001100000073116111786100020382038203820382038
10042037150061168625100010001000264521020182037203715713189510001000100020372037111001100000073116111786100020382038203820382038
10042037160061168625100010001000264521020182037203715713189510001000100020372037111001100000073116111787100020382038203820382038
10042037150061168625100010001000264521120182037203715713189510001000100020372037111001100000073116111823100020382038203820382038
10042037150061168625100010001000264521020182037203715713189510001000100020372037111001100000073116111786100020382038203820382038
10042037150061168625100010001000264521120182037203715713189510001000100020372037111001100001073116111786100020382038203820382038

Test 2: Latency 1->2

Code:

  fcmgt v0.2d, v0.2d, #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 uop (01)cycle (02)03181e3f4e51schedule 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)accdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715000611968625101001001000010010000500284752112001820037200371842131874510100200100002001000020037200371110201100991001001000010003071011611197910100001002003820038200382003820038
102042003715000611968625101001001000010010000500284752102001820037200371842131874510100200100002001000020037200371110201100991001001000010000071011611197910100001002003820038200382003820038
1020420037150006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100021071011611197910100001002003820038200382003820038
1020420037149006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100015071011611197910100001002003820038200382003820038
102042003715000611968625101001001000010010000500284752102001820037200371842131874510100200100002001000020037200371110201100991001001000010000071011611197910100001002003820038200382003820038
102042003715000611968625101001001000010010000500284752102002220037200371842131874510100200100002001000020037200371110201100991001001000010000071011611197910100001002003820038200382003820038
102042003715000611968625101001001000010010000500284752102001820037200371842131874510100200100002001000020037200371110201100991001001000010000071011611197910100001002003820038200382003820038
102042003715000611968625101001001000010010000500284752102001820037200371842131874510100200100002001000020037200371110201100991001001000010000071011611197910100001002003820038200382003820038
102042003715000611968625101001001000010010000500284752102001820037200371842131874510100200100002001000020037200371110201100991001001000010000071011611197910100001002003820038200382003820038
10204200371500061196862510100100100001001000050028525771200182003720037184213187451010020010000200100002003720037111020110099100100100001000150071011611197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)030f191e3f4e51schedule 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
100242003715000061196862510010101000010100005028475211200182003720037184433187671001020100002010000200372003711100211091010100001013640216221982210000102003820038200382003820038
100242003715000082196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001036640216121978610000102003820038200382003820038
100242003715000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001003640216221978610000102003820038200382003820038
100242003715000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
100242003715000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
100242003715000061196862510010101000010106085028475210200182003720037184433187671001020100002010000200372003711100211091010100001026640216221978610000102003820038200382003820038
100242003715000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001000640216221978610000102003820038200382003820038
100242003715000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001003640216221978610000102003820038200382003820038
100242003715000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001016640216221978610000102003820038200382003820038
100242003715000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001050640216221978610000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  fcmgt v0.2d, v8.2d, #0
  fcmgt v1.2d, v8.2d, #0
  fcmgt v2.2d, v8.2d, #0
  fcmgt v3.2d, v8.2d, #0
  fcmgt v4.2d, v8.2d, #0
  fcmgt v5.2d, v8.2d, #0
  fcmgt v6.2d, v8.2d, #0
  fcmgt v7.2d, v8.2d, #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 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)9fl1d cache writeback (a8)acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200611500292580108100800081008002050064013220019200382003899776998980120200800322008003220038200381180201100991001008000010022111151180161120035800001002003920039200392003920039
8020420038150029258010810080008100800205006401322006020038200389977699898012020080032200800322003820038118020110099100100800001000311151180160020035800001002003920039200392003920039
8020420038150029258010810080008100800205006401322001920038200389977699898012020080032200800322003820038118020110099100100800001001011151180160020035800001002003920039200392003920039
8020420038150029258010810080008100800205006401322001920038200389977699898012020080032200800322003820038118020110099100100800001002611151180160120035800001002003920039200392003920039
80204200381500292580108100800081008002050064013220019200382003899776998980120200800322008003220038200381180201100991001008000010063311151180160020035800001002003920039200392003920039
8020420038150029258010810080008100800205006401322001920038200389977699898012020080032200800322003820038118020110099100100800001005011151180160020035800001002003920039200392003920039
8020420038150029258010810080008100800205006401322001920038200389977699898012020080032200800322003820038118020110099100100800001000011151183161020035800001002003920039200392003920039
8020420038150029258010810080008100800205006401322001920038200389977699898012020080032200800322003820038118020110099100100800001000011151180160020035800001002003920039200392003920039
8020420038150029258010810080008100800205006401322001920038200389977699898012020080032200800322003820038118020110099100100800001000011151180160020035800001002003920039200392003920039
8020420038150029258010810080008100800205006401322001920038200389977699898012020080032200800322003820038118020110099100100800001005011151180160020035800001002003920039200392003920039

1000 unrolls and 10 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)5f60696d6emap 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)accdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420039151039258001010800001080000506400000120019200382003899963100188001020800002080000200382003811800211091010800001023305020616672003580000102003920039200392003920039
8002420038150039258001010800001080000506400000020019200382003899963100188001020800002080000200382003811800211091010800001001805020616662003580000102003920039200392003920039
800242003815003925800101080000108000050640000002001920038200389996310018800102080000208000020038200381180021109101080000100005020748562003580000102003920039200392003920039
8002420038150039258001010800001080000506400000120019200382003899963100188001020800002080000200382003811800211091010800001059305020616672003580000102003920039200392003920039
80024200381500392580010128000010800005064000000200192003820038999631001880010208000020800002003820038118002110910108000010468705020716772003580000102003920039200392003920039
800242003815003925800101080000108000050640000012001920038200389996310018800102080000208000020038200381180021109101080000100005020716562003580000102003920039200392003920039
800242003815003925800101080000108000050640000112001920038200389996310018800102080000208000020038200381180021109101080000100305020716762003580000102003920039200392003920039
800242003815003925800101080000108000050640000012001920038200389996310018800102080000208000020038200381180021109101080000100605020616882003580000102003920039200392003920039
800242003815003925800101080000108000050640000012001920038200389996310018800102080000208000020038200381180021109101080000100005020716562003580000102003920039200392003920039
8002420038150039258001010800001080000506400000020019200382003899963100188001020800002080000200382003811800211091010800001022005020816762003580000102003920039200392003920039