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

CMGE (zero, 16B)

Test 1: uops

Code:

  cmge v0.16b, v0.16b, #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)031e3f4e51schedule 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
1004203715082168625100010001000264521120182037203715713189510001000100020372037111001100000073216221786100020382038203820382038
1004203715061168625100010001000264521020182037203715713189510001000100020372037111001100000073216221786100020382038203820382038
1004203715061168625100010001000264521020182037203715713189511521000100020372037111001100000073216221786100020382038203820382038
10042037150611686251000100010002645210201820372037157131895100010001000203720371110011000003073216221786100020382038203820382038
1004203715061168625100010001000264521020182037203715713189510001000100020372037111001100000073216221786100020382038203820382038
10042037150611686251000100010002645210201820372037157131895100010001000203720371110011000007273216221786100020382038203820382038
1004203715061168625100010001000264521020182037203715713189510001000100020372037111001100000073216221786100020382038203820382038
1004203715061168625100010001000264521020182037203715713189510001000100020372037111001100000073216221786100020382038203820382038
1004203715061168625100010001000264521020182037203715713189510001000100020372037111001100000073216221786100020382038203820382038
1004203716061168625100010001000264521020182037203715713189510001000100020372037111001100001073216221786100020382038203820382038

Test 2: Latency 1->2

Code:

  cmge v0.16b, v0.16b, #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)03l2 tlb miss data (0b)18191e3f4e51schedule 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)c2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1020420037150000053619686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037150000025119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
102042003715000006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
102042003715000006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
102042003715000006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
10204200371500001626119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100027101161119791100001002003820038200382003820038
102042003715000006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
1020420037150000216119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
102042003715000006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038
102042003714900006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007101161119791100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03mmu table walk data (08)191e3f4e51schedule 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)60696b6d6emap 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
1002420037150000611968625100101010000101000050284752112001802003720037184433187671001020100002010000200372003711100211091010100001000640516331978610000102003820038200382003820038
1002420037150010611968625100101010000101000050284752112001802003720037184433187671001020100002010000200372003711100211091010100001000640316331978610000102003820038200382003820038
1002420037150000611968625100101010000101000050284752112001802003720037184433187671001020100002010000200372003711100211091010100001000640316331978610000102003820038200382003820038
1002420037150000611968625100101010000101000050284752112001802003720037184433187671001020100002010000200372003711100211091010100001000640316331978610000102003820038200382003820038
1002420037150000611968625100101010000101000050284752112001802003720037184433187671001020100002010000200372003711100211091010100001000640316331978610000102003820038200382003820038
1002420037150000611968625100101010000101000050284752112001802003720037184433187671001020100002010000200372003711100211091010100001000640316331978610000102003820038200382003820038
1002420037150000611968625100101010000101000050284752112001802003720037184433187671001020100002010000200372003711100211091010100001000640316331978610000102003820038200382003820038
1002420037150000611968625100101010000101000050284752112001802003720037184433187671001020100002010000200372003711100211091010100001000640316331978610000102003820038200382003820038
1002420037150000611968625100101010000101000050284752112001802003720037184433187671001020100002010000200372003711100211091010100001000640316331978610000102003820038200382003820038
10024200841500002511968625100101010000101000050284752112001802003720037184433187671001020100002010000200372003711100211091010100001000640316331978610000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  cmge v0.16b, v8.16b, #0
  cmge v1.16b, v8.16b, #0
  cmge v2.16b, v8.16b, #0
  cmge v3.16b, v8.16b, #0
  cmge v4.16b, v8.16b, #0
  cmge v5.16b, v8.16b, #0
  cmge v6.16b, v8.16b, #0
  cmge v7.16b, v8.16b, #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)0309191e3f51schedule 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)acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8020420048150000292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151181160020035800001002003920039200392003920039
80204200381500021292580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000011151180160020035800001002003920039200392003920039
8020420038150000292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151180160020035800001002003920039200392003920039
8020420038150000296380208100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000011151180160020035800001002003920039200392003920039
8020420038150000292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151180160020035800001002003920039200392003920039
8020420038150000292580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000011151180160020035800001002003920039200392003920039
8020420038150000292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151180160020035800001002003920039200392003920039
8020420038149000292580108100800081008002050064013202001920038200389977699898012020080032200800322003820038118020110099100100800001000011151180160020035800001002003920039200392003920039
8020420038150000292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151180160020035800001002003920039200392003920039
80204200381500033292580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000011151180160020035800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03mmu table walk data (08)09l2 tlb miss data (0b)18191e1f3f51schedule 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)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)ld unit uop (a6)l1d cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200501500000000392580010108000010800005064000000200192003820038999603100188001020800002080000200382003811800211091010800001000000050202162220035080000102003920039200392003920039
80024200381550000000392580010108000010800005064000000200192003820038999603100188001020800002080000200382003811800211091010800001000000050202162220035080000102003920039200392003920039
80024200381500000000392580010108000010800005064000000200192003820038999603100188001020800002080000200382003811800211091010800001000000050202162220035080000102003920039200392003920039
800242003815000000003925800881080000108000050640000002001920038200389996031001880010208000020800002003820038118002110910108000010000005150202162220035080000102003920039200392003920039
800242003815000000001592580010108000010800005064000000200192003820038999603100188001020800002080000200382003811800211091010800001000000650202162220035080000102003920039200392003920039
80024200381500000000392580010108000010800005064000000200192003820038999603100188001020800002080000200382003811800211091010800001000000050202162220035080000102003920039200392003920039
80024200381500000000392580010108000010800005064000011200192003820038999603100188001020800002080000200382003811800211091010800001000000050202162220035080000102003920039200392003920039
80024200381500000000392580010108000010800005064000000200192003820038999603100188001020800002080000200382003811800211091010800001000000050202162220035080000102003920039200392003920039
80024200381500000000392580010108000010800005064000000200192003820038999603100188001020800002080000200382003811800211091010800001000000050202162220035080000102003920039200392003920039
8002420038150000000010225800101080000108000050640000002001920038200389996031001880010208000020800002003820038118002110910108000010000003050202162220035080000102003920039200392003920039