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

LSL (register, 32-bit)

Test 1: uops

Code:

  lsl w0, w0, w1
  mov x0, 1
  mov x1, 2

(no loop instructions)

1000 unrolls and 1 iteration

Retires: 1.000

Issues: 1.000

Integer unit issues: 1.000

Load/store unit issues: 0.000

SIMD/FP unit issues: 0.000

retire uop (01)cycle (02)033f4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)606d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst int alu (97)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
100410358618622510001000100016916110351035728386810001000200010354111100110001073241119371000100010361036103610361036
100410358618622510001000100016916110351035728386810001000200010354111100110000073141119371000100010361036103610361036
100410358618622510001000100016916110351035728386810001000200010354111100110000073141119371000100010361036103610361036
100410358618622510001000100016916110351035728386810001000200010354111100110000073141119371000100010361036103610361036
100410357618622510001000100016916110351035728386810001000200010354111100110000073141119371000100010361036103610361036
100410358618622510001000100016916110351035728386810001000200010354111100110000073141119371000100010361036103610361036
100410358618622510001000100016916110351035728386810001000200010354111100110000073141119371000100010361036103610361036
100410358618622510001000100016916110351035728386810001000200010354111100110001073141119371000100010361036103610361036
100410358618622510001000100016916010351035728386810001000200010354111100110000073141119371000100010361036103610361036
100410358618622510001000100016916010351035728386810001000200010354111100110003073141119371000100010361036103610361036

Test 2: Latency 1->2

Code:

  lsl w0, w0, w1
  mov x0, 1
  mov x1, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 1.0035

retire uop (01)cycle (02)031e3a3f4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)696a6d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)9faccdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
10204100357500619877251010010100101008866449695510035100358580387221010010200202001003541111020110099100101001000071013711994110000101001003610036100361003610036
10204100357500619877251010010100101008866449695510035100358580387221010010200202001003541111020110099100101001000071013711994110000101001003610036100361003610036
10204100357500619877251010010100101008866449695510035100358580387221010010200202001003541111020110099100101001000071013711994110000101001003610036100361003610036
102041003575120619877251010010100101008866449695510035100358580387221010010200202001003541111020110099100101001000071013711994110000101001003610036100361003610036
10204100357500619877251010010100101008866449695510035100358580387221010010200202001003541111020110099100101001000071013711994110000101001003610036100361003610036
10204100357500619877251010010100101008866449695510035100358580387221010010200202001003541111020110099100101001000071013711994110000101001003610036100361003610036
10204100357500619877251010010100101008866449695510035100358580387221010010200202001003541111020110099100101001000071013711994110000101001003610036100361003610036
10204100357500619877251010010100101008866449695510035100358580387221010010200202001003541111020110099100101001000071013711994110000101001003610036100361003610036
10204100357500619877251010010100101008866449695510035100358580387221010010200202001003541111020110099100101001000071013711994110000101001003610036100361003610036
10204100357500619877251010010100101008866449695510035100358580387221010010200202001003541111020110099100101001000071013711994110000101001003610036100361003610036

1000 unrolls and 10 iterations

Result (median cycles for code): 1.0035

retire uop (01)cycle (02)031e3a3f4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)60696a6d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)9fl1d tlb miss (a1)ld unit uop (a6)l1d cache writeback (a8)acbranch mispred nonspec (cb)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
10024100357500829863251001010010100108878404969551003510035860238740100101002020020100354111100211091010010100000064044134994010000100101003610036100361003610036
10024100357500829863251001010010100108878404969551003510035860238740100101002020020100354111100211091010010100000064044143994010000100101003610036100361003610036
10024100357501619863251001010010100108878404969551003510035860238740100101002020020100354111100211091010010100000064044143994010000100101003610036100361003610036
10024100357501619863251001010010100108878404969551003510035860238740100101002020020100354111100211091010010100000064044134997110000100101003610036100361003610036
100241003575006119863251001010010100108878404969551003510035860238740100101002020020100354111100211091010010100000064034144994010000100101003610036100361003610036
10024100357501619863251001010010100108878404969551003510035860238740100101002020020100354111100211091010010100000064044143994010000100101003610036100361003610036
10024100357500619863251001010010100108878404969551003510035860238740100101002020020100354111100211091010010100000064034144994010000100101003610036100361003610036
10024100357501619863251001010010100108878404969551003510035860238740100101002020020100354111100211091010010100000064044144994010000100101003610036100361003610036
100241003575011039863251001010010100108878404969551003510035860238740100101002020020100354111100211091010010100000064044144994010000100101003610036100361003610036
100241003576008298632510010100101001088784049695510035100358602387401001010020200201003541111002110910100101000160064044143994010000100101003610036100361003610036

Test 3: Latency 1->3

Code:

  lsl w0, w1, w0
  mov x0, 1
  mov x1, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 1.0035

retire uop (01)cycle (02)031e3f4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)60696a6d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)9fld unit uop (a6)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
1020410035750103987725101001010010100886640496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
102041003575961987725101001010010100886640496955100351003585803872210100102002020010081411110201100991001010010000071013711994110000101001003610036100361003610036
102041003575061987725101001010010100886640496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
10204100357516261987725101001010010100886640496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
102041003575061987725101001010010100886640496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
102041003575061987725101001010010100886640496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
10204100357516561987725101001010010100886640496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
102041003575061987725101011010010100886640496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036
10204100357502129877251010010100101008866404969551003510035858038722101001020020200100354111102011009910010100100000710137111000910000101001003610036100361003610036
102041003575061987725101001010010100886640496955100351003585803872210100102002020010035411110201100991001010010000071013711994110000101001003610036100361003610036

1000 unrolls and 10 iterations

Result (median cycles for code): 1.0035

retire uop (01)cycle (02)0318191e3f4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)60696a6d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)9fl1d cache writeback (a8)a9accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
10024100357500012898632510010100101001088784049695510035100358602387401001010020200201003541111002110910100101000064044144994010000100101003610036100361003610036
1002410035750006198632510010100101001088784049695510035100358602387401001010020200201003541111002110910100101000064034143994010000100101003610036100361003610036
1002410035750006198632510010100101001088784049695510035100358602387401001010020200201003541111002110910100101000064044134994010000100101003610036100361003610036
1002410035750006198632510010100101001088784049695510035100358602387401001010020200201003541111002110910100101010064044143994010000100101003610036100361003610036
1002410035750006198632510010100101001088784049695510035100358602387401001010020200201003541111002110910100101000064044143994010000100101003610036100361003610036
1002410035750006198632510010100101001088784049695510035100358602387401001010020200201003541111002110910100101000064044134994010000100101003610036100361003610036
1002410035750006198632510010100101001088784049695510035100358602387401001010020200201003541111002110910100101000064034143994010000100101003610036100361003610036
1002410035750008298632510010100101001088784049695510035100358602387401001010020200201003541111002110910100101000064044144994010000100101003610036100361003610036
1002410035750006198632510010100101001088784049695510035100358602387401001010020200201003541111002110910100101000364044144994010000100101003610036100361003610036
1002410035750006198632510010100101001088784049695510035100358602387401001010020200201003541111002110910100101000064044144994010000100101003610036100361003610036

Test 4: throughput

Count: 8

Code:

  lsl w0, w8, w9
  lsl w1, w8, w9
  lsl w2, w8, w9
  lsl w3, w8, w9
  lsl w4, w8, w9
  lsl w5, w8, w9
  lsl w6, w8, w9
  lsl w7, w8, w9
  mov x8, 9
  mov x9, 10

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.1673

retire uop (01)cycle (02)031e3f51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)696a6d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)9fcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
802041339010129435258010080100801004005004910306133861338633233334180100802001602001338639118020110099100801001005110219111338380000801001338713387133871338713387
8020413386100035258010080100801004005004910306133861338633233334180100802001602001338639118020110099100801001005110119111338380000801001338713387133871338713387
8020413386100058258010080100801004005004910306133861338633233334180100802001602001338639118020110099100801001005110119111338380000801001338713387133871338713387
8020413386100035258010080100801004005004910306133861338633233334180100802001602001338639118020110099100801001005110119111338380000801001338713387133871338713387
8020413386100035258010080100801004005004910306133861338633233334180100802001602001338639118020110099100801001005110119111338380000801001338713387133871338713387
8020413386100035258010080100801004005004910306133861338633233334180100802001602001338639118020110099100801001005110119111338380000801001338713387133871338713387
8020413386101035258010080100801004005004910306133861338633233334180100802001602001338639118020110099100801001005110119111338380000801001338713387133871338713387
80204133861000121258010080100801004005004910306133861338633233334180100802001602001338639118020110099100801001005110119111338380000801001338713387133871338713387
8020413386100035258010080100801004005004910306133861338633233334180100802001602001338639118020110099100801001005110119111338380000801001338713387133871338713387
80204133861009635258010080100801004005004910306133861338633233334180100802001602001338639118020110099100801001005110119111338380000801001338713387133871338713387

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.1671

retire uop (01)cycle (02)03l1i tlb fill (04)091e3f51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)60696a6d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map int uop inputs (7f)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)9facbranch cond mispred nonspec (c5)cfl1i tlb miss demand (d4)d5map dispatch bubble (d6)dbddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
800241338710100035258001080010800104000500491029113371133713330333488001280020160020133713911800211091080010100050251819017141336880000800101337213372133721337213372
8002413371100110832580010800108001040005014910291133711337133303334880012800201600201337139118002110910800101000502611719017161336880000800101337213372133721337213372
800241337110011083258001080010800104000500491029113371133713330333488001280020160020133713911800211091080010100050271171901691336880000800101337213372133721337213372
800241337110011035258001080010800104000501491029113371133713330333488001280020160020133713911800211091080010100050261919017151336880000800101337213372133721337213372
800241337110011083258001080010800104000501491029113371133713330333488001280020160020133713911800211091080010100050261151909171336880000800101337213372133721337213372
800241337110011083258001080010800104000500491029113371133713330333488001280020160020133713911800211091080010100050271171909171336880000800101337213372133721337213372
800241337110011083258001080010800104000501491029113371133713330333488001280020160020133713931800211091080010100050251919018131336880000800101337213372133721337213372
8002413371100110832580010800108001040005004910291133711337133303334880012800201600201337139118002110910800101000502611019017161336880000800101337213372133721337213372
800241337110011083258001080010800104000501491029113371133713330333488001280020160020133713911800211091080010100050271171908171336880000800101337213372133721337213372
8002413371100110832580010800108001040005014910291133711337133303334880012800201600201337139118002110910800101000502201419017101336880000800101337213372133721337213372