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

UQXTN (D)

Test 1: uops

Code:

  uqxtn s0, d0
  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)033f4e51schedule 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
1004303722612547251000100010003981603018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303723612547251000100010003981603018303730372414328951000100010003037303711100110000073124112629100030383038303830383038
100430372315625472510001000100039816030183037303724143289510001000100030373037111001100034073116112629100030383038303830383038
1004303723612547251000100010003981603018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303722612547251000100010003981603018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303723612547251000100010003981603018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
10043037226125472510001000100039816030183037303724143289510001000100030373037111001100015073116112629100030383038303830383038
1004303723612547251000100010003981603018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303723612547251000100010003981603018303730372414328951000100010003037303711100110000073116112629100030383038303830383038
1004303723612547251000100010003981603018303730372414328951000100010003037303711100110000073116112629100030383038303830383038

Test 2: Latency 1->2

Code:

  uqxtn s0, d0
  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)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)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 mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
10204300372250612954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100000071011611296330100001003003830038300383003830038
102043003722505362954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100000071011611296330100001003003830038300383003830038
102043003722502512954725101001001000010010000500427716030018300373003728264328745101002001000020010000300853008421102011009910010010000100000071011611296330100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100000071011611296330100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100000071011611296330100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100000071011611296330100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100000071011611296330100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100000071011611296330100001003003830038300383003830038
10204300372250612954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100000071011611296330100001003003830038300383003830038
1020430037225018592954725101001001000010010000500427716030018300373003728264328745101002001000020010000300373003711102011009910010010000100000071011611296330100001003003830038300383003830038

1000 unrolls and 10 iterations

Result (median cycles for code): 3.0037

retire uop (01)cycle (02)03mmu table walk data (08)l2 tlb miss data (0b)18191e1f3a3f4e51schedule 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)ld unit uop (a6)l1d cache writeback (a8)a9acc2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? simd retires (ee)? int retires (ef)f5f6f7f8fd
1002430037233000000061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
1002430037225000000061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
1002430037225000000061295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
1002430037225000000061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
1002430037225000000061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
1002430037225000000061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
1002430037225000000061295472510010101000010100005042771601300183003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
1002430037225000000061295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
1002430037225000000061295472510010101000010100005042771601300183003730084282863287671001020100002010000300373003711100211091010100001000000006402162229629010000103003830038300383003830038
1002430037225000000061295472510010101000010100005042771600300183003730037282863287671001020100002010000300373003711100211091010100001000010006402162229629010000103003830038300383003830038

Test 3: throughput

Count: 8

Code:

  uqxtn s0, d8
  uqxtn s1, d8
  uqxtn s2, d8
  uqxtn s3, d8
  uqxtn s4, d8
  uqxtn s5, d8
  uqxtn s6, d8
  uqxtn s7, d8
  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)033f51schedule 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 miss (a1)branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
802042005915030258010810080008100800205006401320200202003920039997769990802322008003220080032200392003911802011009910010080000100011151182162220036800001002010220100200652009920148
802042010615030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100011151182161220036800001002004020040200402004020040
802042003915051258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100011151182162220036800001002004020040200402004020040
802042003915030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100011151181161220036800001002004020040200402004020040
802042003915030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100011151182162120036800001002004020040200402004020040
802042003915030258010810080008100800205006401321200202003920039997769990801202008003220080032200392003911802011009910010080000100011151182162220036800001002004020040200402004020040
802042003915030258010810080008100800205006401320200202003920039997769990801202008003220080032200392003911802011009910010080000100011151182162120036800001002004020040200402004020040
802042003915030258010810080008100800205006401321200202003920039997769990801202008003220080032200392003911802011009910010080000100011151181161220036800001002004020040200402004020040
802042003915030258010810080008100800205006401321200202003920039997769990801202008003220080032200392003911802011009910010080000100011151182161220036800001002004020040200402004020040
802042003915093258010810080008100800205006401321200202003920039997769990801202008003220080032200392003911802011009910010080000100011151181162220036800001002004020040200402004020040

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)1e3a3f51schedule 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 tlb miss (a1)acc2cfd5map dispatch bubble (d6)dadbddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80024200511500004025800101080000108000050640000002002020039200399996310019800102080000208000020039200391180021109101080000100005020101600562003680000102004020040200402004020040
8002420039150000402580010108000010800005064000000200202003920039999631001980010208000020800002003920039118002110910108000010000502091600662003680000102004020040200402004020040
8002420039150000402580010108000010800005064000000200202003920039999631001980010208000020800002003920039118002110910108000010000502071600562003680000102004020040200402004020040
8002420039150000402580010108000010800005064000000200202003920039999631004580329208000020800002003920039118002110910108000010000502071600542003680000102004020040200402004020040
8002420039150000402580010108000010800005064000000200202003920039999631001980010208000020800002003920039118002110910108000010000502091600552003680000102004020040200402004020040
8002420039150000402580010108000010800005064000000200202003920039999631001980010208000020800002003920039118002110910108000010000502081600662003680000102004020040200402004020040
8002420039150000402580010108000010800005064000000200202003920039999631001980010208000020800002003920039118002110910108000010000502081600762003680000102004020040200402004020040
8002420089150000402580010108000010800005064000000200202003920039999631001980010208000020800002003920039118002110910108000010030502091600562003680000102004020040200402004020040
8002420039150000402580106108000010800005064000011200202003920039999631004780010208000020800002003920039118002110910108000010000502071600762003680000102004020040200402004020040
8002420039150000402580010108000010800005064000010200202003920039999631001980010208000020800002003920039118002110910108000010000502071600552003680000102004020040200402004020040