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, 4H)

Test 1: uops

Code:

  cmge v0.4h, v0.4h, #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 miss (a1)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
1004203715061168625100010001000264521120182037203715713189510001000100020372037111001100000073116111786100020382038203820382038
1004203715061168625100010001000264521120182037203715713189510001000100020372037111001100000073116111786100020382038203820382038
1004203715061168625100010001000264521120182037203715713189510001000100020372037111001100000073116111786100020382038203820382038
1004203715061168625100010001000264521120182037203715713189510001000100020372037111001100000073116111786100020382038203820382038
100420371519861168625100010001000264521120182037203715713189510001000100020372037111001100001073116111786100020382038203820382038
1004203715084168625100010001000264521020182037203715713189510001000100020372037111001100000073116111786100020382038203820382038
1004203715061168625100010001000264521020182037203715713189510001000100020372037111001100000073116111786100020382038203820382038
1004203715082168625100010001000264521120182037203715713189510001000100020372037111001100000073116111786100020382038203820382038
1004203715061168625100010001000264521020182037203715713189510001000100020372037111001100000073116111786100020382038203820382038
1004203715061168625100010001000264521120182037203715713189510001000100020372037111001100000073116111786100020382038203820382038

Test 2: Latency 1->2

Code:

  cmge v0.4h, v0.4h, #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)031e3f4e51schedule 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 tlb access (a0)l1d tlb miss (a1)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0ea? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100010071011611197910100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
1020420037150061196862510100100100001001000050028475210200182003720037184213187451010020010000200100002003720037111020110099100100100001000009371011611197910100001002003820038200382003820038
1020420037150061196862510100100100001001000050028475210200182003720037184213187451010020010000200100002003720037111020110099100100100001000001271011611197910100001002003820038200382003820038
1020420037150061196862510100100100001001000050028475210200182003720037184213187451010020010000200100002003720037111020110099100100100001004048071011611197910100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038
102042003715006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100000071011611197910100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03mmu table walk data (08)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)acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
100242003715000001871968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010300640516551978610000102003820038200382003820038
10024200371500110611968625100101010000101000050284752112001820037200371844331876710010201000020100002003720037111002110910101000010000640516551978610000102003820038200382003820038
1002420037150000097819686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000102360640516551978610000102003820038200382003820038
100242003715000008419686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000104400640416551978610000102003820085200382003820038
1002420037150000061196862510010101000010100005028475210200182003720037184433187671001020100002010000200372003711100211091010100001043840640516551978610000102003820038200382003820038
10024200371500000611968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010000640516551978610000102003820038200382003820086
1002420037150000095919686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000104400640516551978610000102003820038200382003820038
100242003715000001241968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010000640516551978610000102003820038200382003820038
10024200371500000611968625100101010000101000050284752102001820037200371844331876710010201000020100002003720037111002110910101000010000640516551978610000102003820038200382003820038
10024200371500000109419686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000104100640416541978610000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  cmge v0.4h, v8.4h, #0
  cmge v1.4h, v8.4h, #0
  cmge v2.4h, v8.4h, #0
  cmge v3.4h, v8.4h, #0
  cmge v4.4h, v8.4h, #0
  cmge v5.4h, v8.4h, #0
  cmge v6.4h, v8.4h, #0
  cmge v7.4h, v8.4h, #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)03191e3f51schedule 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)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200571500093825801081008000810080020500640132120019200382003899776998980120200800322008003220038200381180201100991001008000010000111511811620035800001002003920039200392003920039
80204200381500065258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100320111511801620035800001002003920039200392003920039
80204200381500081125801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010000111511801620035800001002003920039200392003920039
802042003815000115258010810080008100800205006401320200192003820038997769989801202008003220080032200382003811802011009910010080000100290111511801620035800001002003920039200392003920039
8020420038150002925801081008000810080104500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010000111511801620035800001002003920039200392003920039
8020420038150002925801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010000111511801620035800001002003920039200392003920039
80204200381500092258010810080008100800205006401320200192003820038997769989801202008003220080032200382003811802011009910010080000100380111511801620035800001002003920039200392003920039
8020420038149002925801081008000810080020500640132020019200382003899776998980120200800322008003220038200381180201100991001008000010000111511801620035800001002003920039200392003920039
80204200381500029258010810080008100800205006401320200192003820038997769989801202008003220080032200382003811802011009910010080000100310111511801620035800001002003920039200392003920039
80204200381500629258010810080008100800205006401320200192003820038997769989801202008003220080032200382003811802011009910010080000100420111511801620035800001002003920039200392003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)030e191e3a3f51schedule 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 tlb access (a0)l1d tlb miss (a1)l1d cache writeback (a8)accfl1i cache miss demand (d3)d5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420051150200075125800101080000108000050640000200192003820038999631001880010208000020800002003820038118002110910108000010000050200416242003580000102003920039200392003920039
800242003815000003925800101080000108000050640000200192003820038999631001880010208000020800002003820038118002110910108000010000050200216242003580000102003920039200392003920039
800242003815000008325800101080000108000050640000200192003820038999631001880010208000020800002003820038118002110910108000010001050200416422003580000102003920039200392003920039
800242003815000003925800101080000108000050640000200192003820038999631001880010208000020800002003820038118002110910108000010000050200416242003580000102003920039200392003920039
800242003815000003925800101080000108000050640000200192003820038999631001880010208000020800002003820038118002110910108000010000050200216442003580000102003920039200392003920039
8002420038150000034325800101080000108000050640000200192003820038999631001880010208000020800002003820038118002110910108000010000050200216242003580000102003920039200392003920039
800242003815000003925800101080000108000050640000200192003820038999631001880010208000020800002003820038118002110910108000010000050200416422003580000102003920039200392003920039
8002420038150000039258001010800001080000506400002001920038200389996310018800102080000208000020038200381180021109101080000100033650200216422003580000102003920039200392003920039
800242003815000003925800101080000108000050640000200192003820038999631001880010208000020800002003820038118002110910108000010000050200416422003580000102003920039200392003920039
800242003815000003925800101080000108000050640000200192003820038999631001880010208000020800002003820038118002110910108000010000350200216242003580000102003920039200392003920039