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

FCMGE (scalar, zero, S)

Test 1: uops

Code:

  fcmge s0, s0, #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)03191e3f4e51schedule 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 tlb miss (a1)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100420371500611686251000100010002645210201820372037157131895100010001000203720371110011000000073216111786100020382038203820382038
100420371600711686251000100010002645211201820372037157131895100010001000203720371110011000000073116111786100020382038203820382038
100420371500611686251000100010002645211201820372037157131895100010001000203720371110011000000073116111786100020382038203820382038
100420371500611686251000100010002645210201820372037157131895100010001000203720371110011000000073116111786100020382038203820382038
100420371500611686251000100010002645210201820372037157131895100010001000203720371110011000000673116111786100020382038203820382038
100420371500611686251000100010002645211201820372037157131895100010001000203720371110011000000073116111786100020382038203820382038
1004203715012611686251000100010002645211201820372037157131895100010001000203720371110011000000073116111786100020382038203820382038
100420371500821686251000100010002645211201820372037157131895100010001000203720371110011000000073116111786100020382038203820382038
100420371500611686251000100010002645211201820372037157131895100010001000203720371110011000000073116111786100020382038203820382038
100420371500821686251000100010002645211201820372037157131895100010001000203720371110011000001073116111786100020382038203820382038

Test 2: Latency 1->2

Code:

  fcmge s0, s0, #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)031e1f3f4e51schedule 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
1020420037150006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100007102162219791100001002003820038200382003820038
1020420037150006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007102162219791100001002003820038200382003820038
1020420037150006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007102162219791100001002003820038200382003820038
1020420037150006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100007102162219791100001002003820038200382003820038
1020420037150006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100007102162219791100001002003820038200382003820038
1020420037150006119686251010010010000100100005002847521020018200372003718421318745101002001000020010000200372003711102011009910010010000100007102162219791100001002003820038200382003820038
1020420037150006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100007102162219791100001002003820038200382003820038
1020420037150006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100007102162219791100001002003820038200382003820038
1020420037150006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100007102162219791100001002003820038200382003820038
1020420037149006119686251010010010000100100005002847521120018200372003718421318745101002001000020010000200372003711102011009910010010000100007102162219791100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03mmu table walk data (08)l2 tlb miss data (0b)18191e1f3f4e51schedule 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 tlb access (a0)l1d tlb miss (a1)ld unit uop (a6)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002420037150000000251196862510010101000010100005028475211200180200372003718443318767100102010000201000020037200371110021109101010000100000006406163319786010000102003820038200382003820038
100242003715000000061196862510010101000010100005028475211200180200372003718443318767100102010000201000020037200371110021109101010000100000006403163319786010000102003820038200382003820038
100242003715000000061196862510010101000010100005028475211200180200372003718443318767100102010000201000020037200371110021109101010000100000006403163319786010000102008520038200382003820038
100242003715000000061196862510010101000010100005028475211200180200372003718443318767100102010000201000020037200371110021109101010000100000006403163319786010000102003820038200382003820038
1002420037150000000233196862510010101000010100005028475211200180200372003718443318767100102010000201000020037200371110021109101010000100000006404163319786010000102003820038200382003820038
100242003715000000061196862510010101000010100005028475211200180200372003718443318767100102010000201000020037200371110021109101010000100000006404163319786010000102003820038200382003820038
100242003715000000061196862510010101000010100005028475211200180200372003718443318767100102010000201000020037200371110021109101010000100000006403163319786010000102003820038200382003820038
100242003715000000061196862510010101000010100005028475211200180200372003718443318767100102010000201000020037200841110021109101010000100000006404163319786010000102003820038200382003820038
100242003715000000061196862510010101000010100005028475211200180200372003718443318767100102010000201000020037200371110021109101010000100000006404163319786010000102003820038200382003820038
100242003715000000061196862510010101000010100005028475211200180200372003718443318767100102010000201000020037200371110021109101010000100000006403163319786010000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  fcmge s0, s8, #0
  fcmge s1, s8, #0
  fcmge s2, s8, #0
  fcmge s3, s8, #0
  fcmge s4, s8, #0
  fcmge s5, s8, #0
  fcmge s6, s8, #0
  fcmge s7, s8, #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)031e3f5051schedule 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)fetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042005715091240258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118416020035800001002003920039200392003920039
802042003815002850258010810080008100800205006401320200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118416020035800001002003920039200392003920039
80204200381500290258010810080008100800205006401320200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118116020035800001002003920039200392003920039
80204200381500290258010810080008100800205006401320200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118316020035800001002003920039200392003920039
80204200381500290258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118316020035800001002003920039200392003920039
80204200381500290258010810080008100800205006401321200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118316020035800001002003920039200392003920039
80204200381500290258010810080008100800205006401320200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118316020035800001002003920039200392003920039
802042003815007102580108100800081008002050064013212001920038200389977699898012020080032200800322003820038118020110099100100800001000121115118116020035800001002003920039200392003920039
80204200381500296258010810080008100800205006401320200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118316020035800001002003920039200392003920039
80204200381500290258010810080008100800205006401320200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118216020035800001002003920039200892003920039

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)033a3f51schedule 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)6061696d6emap 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)acc2cfd0d2d5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
800242005115003925800101080000108000050640000102001920038200389996310018800102080000208000020038200381180021109101080000100005020150416442003580000102003920039200392003920039
800242003815003925800101080000108000050640000102001920038200389996310018800102080000208000020038200381180021109101080000100005020150216242003580000102003920039200392003920039
800242003815003925800101080000108000050640000102001920038200389996310018800102080000208000020038200381180021109101080000100005020150316422003580000102003920039200392003920039
800242003815008325800101080000108000050640000102001920038200389996310018800102080000208000020038200381180021109101080000100005040150216252003580000102003920039200392003920039
800242003815003925800101080000108000050640000102001920038200389996310018800102080000208000020038200381180021109101080000100005020120416242003580000102003920039200392003920039
800242003815003925800101080000108000050640000102001920038200389996310018800102080000208000020038200381180021109101080000100005020120216342003580000102003920039200392003920039
800242003815016025800101080000108000050640000102001920038200389996310018800102080000208000020038200381180021109101080000100005020120416542003580000102003920039200392003920039
800242003815003925800101080000108000050640000102001920038200389996310018800102080000208000020038200381180021109101080000100005020120216242003580000102003920039200392003920039
800242003815003925800101080000108000050640000102001920038200389996310018800102080000208000020038200381180022109101080000100005020120416432003580000102003920039200392003920039
8002420038150038525800101080000108000050640000102001920038200389996310018800102080000208000020038200381180021109101080000100005020120416242003580000102003920039200392003920039