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

UADDLV (vector, 16B)

Test 1: uops

Code:

  uaddlv h0, v0.16b
  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)696d6emap 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 cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
10043037220612547251000100010003981603018303730372414328951000100020003037303711100110000073116112629100030383038303830383038
10043037230612547251000100010003981603018303730372414328951000100020003037303711100110001073116112629100030383038303830383038
10043037230612547251000100010003981603018303730372414328951000100020003037303711100110001073116112629100030383038303830383038
10043037230612547251000100010003981603018303730372414328951000100020003037303711100110000073116112629100030383038303830383038
10043037230612547251000100010003981603018303730372414328951000100020003037303711100110001073116112629100030383038303830383038
10043037220612547251000100010003981603018303730372414328951000100020003037303711100110000073116112629100030383038303830383038
100430372315612547251000100010003981603018303730372414328951000100020003037303711100110000073116112629100030383038303830383038
10043037230612547251000100010003981603018303730372414328951000100020003037303711100110000073116112629100030383038303830383038
10043037230612547251000100010003981603018303730372414328951000100020003037303711100110000673116112629100030383038303830383038
10043037230612547251000100010003981603018303730372414328951000100020003037303711100110000073116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  uaddlv h0, v0.16b
  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 3.0037

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
1020430037224006129547251010010010000100100005004277160030018300373003728264328745101002001000020020000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
10204300372250014729547251010010010000100100005004277160130018300373003728264328745101002001000020020000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
1020430037225006129547251010010010000100100005004277160030018300373003728264328745101002001000020020000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
1020430037225006129547251010010010000100100005004277160030018300373003728264328745101002001000020020000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
1020430037225006129547251010010010000100100005004277160030018300373003728264328745101002001000020020000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
1020430037225006129547251010010010000100100005004277160030018300373003728264328745101002001000020020000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
1020430037224006129547251010010010000100100005004277160030018300373003728264328745101002001000020020000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
1020430037224006129547251010010010000100100005004277160030018300373003728264328745101002001000020020000300373003711102011009910010010000100007101161129633100001003003830038300383003830084
1020430037225006129547251010010010000100100005004277160030018300373003728264328745101002001000020020000300373003711102011009910010010000100007101161129633100001003003830038300383003830038
1020430037224006129547251010010010000100100005004277160030018300373003728264328745101002001000020020000300373003711102011009910010010000100007101161129633100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)0309181e3f4e51schedule 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)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002430037225000612954725100101010000101000050427716013001830037300372828632876710010201000020200003003730037111002110910101000010000640216222962910000103003830038300383003830038
1002430037225000612954725100101010000101000050427716013001830321300372828632876710010201000020200003003730037111002110910101000010000640216222962910000103003830038300383003830038
1002430037225000612954725100101010000101000050427716003001830037300372828632876710010201000020200003003730037111002110910101000010000640216222962910000103003830038300383003830038
1002430037225000612954725100101010000101000050427716003001830037300372828632876710010201000020200003003730037111002110910101000010000640216222962910000103003830038300383003830038
1002430037225000612954725100101010000101000050427716003001830037300372828632876710010201000020200003003730037111002110910101000010000640216222962910000103003830038300383003830038
1002430037225000612954725100101010007101000050427716013001830037300372828632876710010201000020200003003730037111002110910101000010000640216222962910000103003830038300383003830038
1002430037225000612954725100101010000101000050427716003001830037300372828632876710010201000020200003003730037111002110910101000010000640216222962910000103003830038300383003830038
1002430037225000842954743100101010000101000050427716003001830037300372828632876710010201000020200003003730037111002110910101000010000640216222962910000103003830038300383003830038
1002430037225000612954725100101010000101000050427716003001830037300372828632876710010201000020200003003730037111002110910101000010000640216222962910000103003830038300383003830038
1002430037225000612954725100101010024101000050427716003001830037300372828632876710010201000020200003003730037111002110910101000010000682216222962910000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  uaddlv h0, v8.16b
  uaddlv h1, v8.16b
  uaddlv h2, v8.16b
  uaddlv h3, v8.16b
  uaddlv h4, v8.16b
  uaddlv h5, v8.16b
  uaddlv h6, v8.16b
  uaddlv h7, v8.16b
  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)03mmu table walk instruction (07)1e3f51schedule 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
8020420058150003025801081008000810080020500640132020020200392003999776999080120200800322001600642003920039118020110099100100800001000011151181160020036800001002004020040200402004020040
8020420039150103025801081008000810080020500640132020020200392003999776999080120200800322001600642003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
8020420039150003025801081008000810080020500640132020020200392003999776999080120200800322001600642003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
8020420039150003025801081008000810080020500640132020020200392003999776999080120200800322001600642003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
8020420039150003025801081008000810080020500640132020020200392003999776999080120200800322001600642003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
8020420039150003025801081008000810080020500640132120020200392003999776999080120200800322001600642003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
8020420039150003025801081008000810080020500640132020020200392003999776999080120200800322001600642003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
8020420039150003025801081008000810080020500640132020020200392003999776999080120200800322001600642003920039118020110099100100800001000011151180160020036800001002004020040200402004020040
80204200391500022025801081008000810080020500640132020020200392003999776999080120200800322001600642003920039118020110099100100800001000011151370160020036800001002004020040200402004020040
8020420039150003025801081008000810080020500640132020020200392003999776999080120200800322001600642003920039118020110099100100800001000011151180160020036800001002004020040200402004020040

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)5f6061696d6emap 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 miss (a1)l1d cache writeback (a8)acbranch mispred nonspec (cb)cfd0d2l1i cache miss demand (d3)d5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420039150082258001010800001080000506400000002002020039200399996310019800102080000201600002003920039118002110910108000010001505020000416342003680000102004020040200402004020040
800242003915004025800101080000108000050640000000200202003920039999631001980010208000020160000200392003911800211091010800001000005020000216422003680000102004020040200402004020040
800242003915004025800101080000108000050640000015200202003920039999631001980010208000020160000200392003911800211091010800001001005020000416242003680000102004020040200402004020040
800242003915004025800101080000108000050640000000200202003920039999631001980010208000020160000200392003911800211091010800001000005020500416242003680000102004020040200402004020040
800242003915004025800101080000108000050640000000200202003920039999631001980010208000020160000200392003911800211091010800001000005020510216242003680000102004020040200402004020040
800242003915004025800101080000108000050640756015200202003920039999631001980010208000020160000200392003911800211091010800001000005020510216742003680000102004020040200402004020040
800242003915004025800101080000108000050640000000200202003920039999631001980010208000020160000200392003911800211091010800001000005020510216622003680000102004020040200402004020040
800242003915004025800101080000108000050640000000200202003920039999631001980010208000020160000200392003911800211091010800001000005020000416642003680000102004020040200402004020040
800242003915004025800101080000108000050640000015200202003920039999631001980010208000020160000200392003911800211091010800001000005020000316242003680000102004020040200402004020040
800242003915004025800101080000108000050640000000200202003920039999631001980010208000020160000200392003911800211091010800001000005020500416442003680000102004020040200402004020040