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

EOR (immediate, 32-bit)

Test 1: uops

Code:

  eor w0, w0, #3
  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)031e3f4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)6d6emap 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)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
10041035806186225100010001000169161035103572838681000100010001035411110011000073241229371000100010361036103610361036
10041035806186225100010001000169161035103572838681000100010001035411110011000073241229371000100010361036103610361036
10041035706186225100010001000169161035103572838681000100010001035411110011000073241229371000100010361036103610361036
10041035706186225100010001000169161035103572838681000100010001035411110011000073241229371000100010361036103610361036
10041035806186225100010001000169161035103572838681000100010001035411110011000073241229371022100010361036103610361036
10041035706186225100010001000169161035103572838681000100010001035411110011000073241229371000100010361036103610361036
10041035806186225100010001000169161035103572838681000100010001035411110011000073241229371000100010361036103610361036
10041035706186225100010001000169161035103572838681000100010001035411110011000073241229371000100010361036103610361036
10041035706186225100010001000169161035103572838681000100010001035411110011000073241229371000100010361036103610361036
10041035706186225100010001000169161035103572838681000100010001035411110011000073241229371000100010361036103610361036

Test 2: Latency 1->2

Code:

  eor w0, w0, #3
  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)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)9fl1d cache writeback (a8)acbranch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
10204100357522861987725101001010010100886644969551003510035858038722101001020010200100354111102011009910010100100012071023722994110000101001003610036100361003610036
102041003575159244698772510100101001010088664496955100351003585803872210100102001020010035411110201100991001010010000071023722994110000101001003610036100361003610036
10204100357506198772510100101001010088664496955100351003585803872210100102001020010035411110201100991001010010000071023722994110000101001003610036100361003610036
102041003575024698772510100101001010088664496955100351003585803872210100102001020010035411110201100991001010010000071023722994110000101001003610036100361003610036
102041003575028298772510100101001010088664496955100351003585803872210100102001020010035411110201100991001010010000071023722994110000101001003610036100361003610036
10204100357506198772510100101001010090662496955100351003585803872210100102001020010035411110201100991001010010000071023722994110000101001003610036100361003610036
10204100357506198772510100101001010088664496955100351003585803872210100102001020010035411110201100991001010010000071023722994110000101001003610036100361003610036
102041003575098498772510100101001010088664496955100351003585803872210100102001020010035411110201100991001010010000071023722994110000101001003610036100361003610036
102041003575039798772510100101001010088664496955100351003585803872210100102001020010035411110201100991001010010000071023722994110000101001003610036100361003610036
102041003575032298772510100101001010088664496955100351003585803872210100103781020010035411110201100991001010010000071023722994110000101001003610036100361003610036

1000 unrolls and 10 iterations

Result (median cycles for code): 1.0035

retire uop (01)cycle (02)03mmu table walk data (08)181e3f4d51schedule uop (52)schedule int uop (53)dispatch int uop (56)int uops in schedulers (59)6061696a6b6d6emap 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)acc2cfd0d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
1002410035750006198632510010100101001088784004969550100351003586023874010010100201002010035411110021109101001010000640024122994010000100101003610036100361003610036
1002410035750006198632510010100101001088784004969550100351003586023874010010100201002010035411110021109101001010000640024122994010000100101003610036100361003610036
1002410035750036198632510010100101001088784004969550100351003586023874010010100201002010035411110021109101001010000640024122994010000100101003610036100361003610036
1002410035750006198632510010100101001088784004969550100351003586023874010010100201002010035411110021109101001010000640024122994010000100101003610036100361003610036
100241003575003846198632510010100101001088784004969553100351003586023874010010100201002010035411110021109101001010000640024122994010000100101003610036100361003610036
1002410035750006198632510010100101001088784004969550100351003586023874010010100201002010035411110021109101001010000640024122994010000100101003610036100361003610036
1002410035750006198632510010100101001090239104969550100351003586023874010010100201002010035411110021109101001010000640024122994010000100101003610036100361003610036
1002410035750006198632510010100101001088784004969550100351003586023874010010100201002010035411110021109101001010000640024122994010000100101003610036100361003610036
100241003575001326198632510010100101001088784004969550100351003586023874010010100201002010035411110021109101001010000640024122994010000100101003610036100361003610036
10024100357500010398632510010100101001088784104969550100351003586023874010010100201002010035411110021109101001010000640024122994010000100101003610036100361003610036

Test 3: throughput

Count: 8

Code:

  eor w0, w8, #3
  eor w1, w8, #3
  eor w2, w8, #3
  eor w3, w8, #3
  eor w4, w8, #3
  eor w5, w8, #3
  eor w6, w8, #3
  eor w7, w8, #3
  mov x8, 9

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.1674

retire uop (01)cycle (02)031e3f51schedule 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)9fbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfmap dispatch bubble (d6)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
80204134131002428278013680136801484007101491031013390133903326633368014880264802641339039118020110099100801001001115119161338780036801001339113391133911339113391
80204133901001528278013680136801484007101491031013390133903326633368014880264802641339039118020110099100801001001115119161338780036801001339113391133911339113391
8020413390100028278013680136801484007101491031013390133903326633368014880264802641339039118020110099100801001001115119161338780036801001339113391133911339113391
8020413390100028278013680136801484007101491031013390133903326633368014880264802641339039118020110099100801001001115119161338780036801001339113391133911339113391
8020413390100028278013680136801484007101491031013390133903326633368014880264802641339039118020110099100801001001115119161338780036801001339113391133911339113391
8020413390101028278013680136801484007101491031013390133903326633368014880264802641339039118020110099100801001001115119161338780036801001339113391133911339113391
802041339010018328278013680136801484007101491031013390133903326633368014880264802641339039118020110099100801001001115119161338780036801001339113391133911339113391
8020413390100628278013680136801484007101491031013390133903326633368014880264802641339039118020110099100801001001115119161338780036801001339113391133911339113391
8020413390100028278013680136801484007101491031013390133903326633368014880264802641339039118020110099100801001001115119161338780036801001339113391133911339113391
8020413390100219503278013680136801484007101491031013390133903326633368014880264802641339039118020110099100801001001115119171338780036801001339113391133911339113391

1000 unrolls and 10 iterations

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

retire uop (01)cycle (02)03181e1f3f51schedule 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)9facc2branch cond mispred nonspec (c5)cfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? int retires (ef)f5f6f7f8fd
8002413390100000352580010800108001040005049102911337113371333033348800108002080020133713911800211091080010100005020619261336880000800101337213372133721337213372
8002413371100000562580010800108001040005049102911337113371333033348800108002080020133713911800211091080010100005020219221336880000800101337213372133721337213372
8002413371100100352580010800108001040005049102911337113371333033348800108002080020133713911800211091080010100005020219621336880000800101337213372133721337213372
8002413371100000352580010800108001040005049102911337113371333033348800108002080020133713911800211091080010100005020619621336880000800101337213372133721337213372
8002413371100000352580010800108001040005049102911337113371333033348800108002080020133713911800211091080010100005022619221336880000800101337213372133721337213372
8002413371100000352580010800108001040005049102911337113371333033348800108002080020133713911800211091080010100015022319221336880000800101337213372133721337213372
80024133711000088352580010800108001040005049102911337113371333033348800108002080020133713911800211091080010100005020219221336880000800101337213372133721337213372
8002413371100000352580010800108001040005049102911337113371333033348800108002080020133713911800211091080010100005020219221336880000800101337213372133721337213372
8002413371100000352580010800108001040005049102911337113371333033348800108002080020133713911800211091080010100005020219261336880000800101337213372133721337213372
8002413371100090352580010800108001040005049102911337113371333033348800108002080020133713911800211091080010100005020219221336880000800101337213372133721337213372