BSF (R64, M64)

With unroll_count=500 and no inner loop

Code:

   0:	4d 0f bc 06          	bsf    r8,QWORD PTR [r14]

Show nanoBench command
Results:
- Instructions retired: 1.0
- Core cycles: 1.0
- Reference cycles: 1.01
- RS_UOPS_DISPATCHED: 3.0
- UOPS_PORT_0: 0.5
- UOPS_PORT_1: 1.0
- UOPS_PORT_2: 1.0
- UOPS_PORT_3: 0.0
- UOPS_PORT_4: 0.0
- UOPS_PORT_5: 0.5

With loop_count=1000 and unroll_count=10

Code:

   0:	4d 0f bc 06          	bsf    r8,QWORD PTR [r14]

Show nanoBench command
Results:
- Instructions retired: 1.2
- Core cycles: 1.1
- Reference cycles: 1.09
- RS_UOPS_DISPATCHED: 3.2
- UOPS_PORT_0: 0.5
- UOPS_PORT_1: 1.09
- UOPS_PORT_2: 1.0
- UOPS_PORT_3: 0.0
- UOPS_PORT_4: 0.0
- UOPS_PORT_5: 0.61

With loop_count=100 and unroll_count=100

Code:

   0:	4d 0f bc 06          	bsf    r8,QWORD PTR [r14]

Show nanoBench command
Results:
- Instructions retired: 1.02
- Core cycles: 1.01
- Reference cycles: 1.01
- RS_UOPS_DISPATCHED: 3.02
- UOPS_PORT_0: 0.5
- UOPS_PORT_1: 1.01
- UOPS_PORT_2: 1.0
- UOPS_PORT_3: 0.0
- UOPS_PORT_4: 0.0
- UOPS_PORT_5: 0.51

With 4 independent instructions

With unroll_count=200 and no inner loop

Code:

   0:	4d 0f bc 06          	bsf    r8,QWORD PTR [r14]
   4:	4d 0f bc 4e 08       	bsf    r9,QWORD PTR [r14+0x8]
   9:	4d 0f bc 56 10       	bsf    r10,QWORD PTR [r14+0x10]
   e:	4d 0f bc 5e 18       	bsf    r11,QWORD PTR [r14+0x18]

Show nanoBench command
Results:
- Instructions retired: 4.0
- Core cycles: 4.0
- Reference cycles: 4.0
- RS_UOPS_DISPATCHED: 12.0
- UOPS_PORT_0: 1.85
- UOPS_PORT_1: 4.01
- UOPS_PORT_2: 4.0
- UOPS_PORT_3: 0.0
- UOPS_PORT_4: 0.0
- UOPS_PORT_5: 2.15

With loop_count=1000 and unroll_count=2

Code:

   0:	4d 0f bc 06          	bsf    r8,QWORD PTR [r14]
   4:	4d 0f bc 4e 08       	bsf    r9,QWORD PTR [r14+0x8]
   9:	4d 0f bc 56 10       	bsf    r10,QWORD PTR [r14+0x10]
   e:	4d 0f bc 5e 18       	bsf    r11,QWORD PTR [r14+0x18]

Show nanoBench command
Results:
- Instructions retired: 5.0
- Core cycles: 4.01
- Reference cycles: 4.01
- RS_UOPS_DISPATCHED: 13.01
- UOPS_PORT_0: 2.24
- UOPS_PORT_1: 4.0
- UOPS_PORT_2: 4.0
- UOPS_PORT_3: 0.0
- UOPS_PORT_4: 0.0
- UOPS_PORT_5: 2.76

With loop_count=100 and unroll_count=20

Code:

   0:	4d 0f bc 06          	bsf    r8,QWORD PTR [r14]
   4:	4d 0f bc 4e 08       	bsf    r9,QWORD PTR [r14+0x8]
   9:	4d 0f bc 56 10       	bsf    r10,QWORD PTR [r14+0x10]
   e:	4d 0f bc 5e 18       	bsf    r11,QWORD PTR [r14+0x18]

Show nanoBench command
Results:
- Instructions retired: 4.1
- Core cycles: 4.01
- Reference cycles: 4.01
- RS_UOPS_DISPATCHED: 12.11
- UOPS_PORT_0: 1.93
- UOPS_PORT_1: 4.0
- UOPS_PORT_2: 4.0
- UOPS_PORT_3: 0.0
- UOPS_PORT_4: 0.0
- UOPS_PORT_5: 2.17

With 8 independent instructions

With unroll_count=100 and no inner loop

Code:

   0:	4d 0f bc 06          	bsf    r8,QWORD PTR [r14]
   4:	4d 0f bc 4e 08       	bsf    r9,QWORD PTR [r14+0x8]
   9:	4d 0f bc 56 10       	bsf    r10,QWORD PTR [r14+0x10]
   e:	4d 0f bc 5e 18       	bsf    r11,QWORD PTR [r14+0x18]
  13:	4d 0f bc 66 20       	bsf    r12,QWORD PTR [r14+0x20]
  18:	49 0f bc 5e 28       	bsf    rbx,QWORD PTR [r14+0x28]
  1d:	49 0f bc 4e 30       	bsf    rcx,QWORD PTR [r14+0x30]
  22:	49 0f bc 56 38       	bsf    rdx,QWORD PTR [r14+0x38]

Show nanoBench command
Results:
- Instructions retired: 8.0
- Core cycles: 8.0
- Reference cycles: 8.03
- RS_UOPS_DISPATCHED: 24.0
- UOPS_PORT_0: 3.73
- UOPS_PORT_1: 8.0
- UOPS_PORT_2: 8.0
- UOPS_PORT_3: 0.0
- UOPS_PORT_4: 0.0
- UOPS_PORT_5: 4.27

With loop_count=1000 and unroll_count=1

Code:

   0:	4d 0f bc 06          	bsf    r8,QWORD PTR [r14]
   4:	4d 0f bc 4e 08       	bsf    r9,QWORD PTR [r14+0x8]
   9:	4d 0f bc 56 10       	bsf    r10,QWORD PTR [r14+0x10]
   e:	4d 0f bc 5e 18       	bsf    r11,QWORD PTR [r14+0x18]
  13:	4d 0f bc 66 20       	bsf    r12,QWORD PTR [r14+0x20]
  18:	49 0f bc 5e 28       	bsf    rbx,QWORD PTR [r14+0x28]
  1d:	49 0f bc 4e 30       	bsf    rcx,QWORD PTR [r14+0x30]
  22:	49 0f bc 56 38       	bsf    rdx,QWORD PTR [r14+0x38]

Show nanoBench command
Results:
- Instructions retired: 10.0
- Core cycles: 8.02
- Reference cycles: 8.01
- RS_UOPS_DISPATCHED: 26.02
- UOPS_PORT_0: 4.51
- UOPS_PORT_1: 8.01
- UOPS_PORT_2: 8.01
- UOPS_PORT_3: 0.0
- UOPS_PORT_4: 0.0
- UOPS_PORT_5: 5.5

With loop_count=100 and unroll_count=10

Code:

   0:	4d 0f bc 06          	bsf    r8,QWORD PTR [r14]
   4:	4d 0f bc 4e 08       	bsf    r9,QWORD PTR [r14+0x8]
   9:	4d 0f bc 56 10       	bsf    r10,QWORD PTR [r14+0x10]
   e:	4d 0f bc 5e 18       	bsf    r11,QWORD PTR [r14+0x18]
  13:	4d 0f bc 66 20       	bsf    r12,QWORD PTR [r14+0x20]
  18:	49 0f bc 5e 28       	bsf    rbx,QWORD PTR [r14+0x28]
  1d:	49 0f bc 4e 30       	bsf    rcx,QWORD PTR [r14+0x30]
  22:	49 0f bc 56 38       	bsf    rdx,QWORD PTR [r14+0x38]

Show nanoBench command
Results:
- Instructions retired: 8.2
- Core cycles: 8.01
- Reference cycles: 8.01
- RS_UOPS_DISPATCHED: 24.22
- UOPS_PORT_0: 3.86
- UOPS_PORT_1: 8.01
- UOPS_PORT_2: 8.01
- UOPS_PORT_3: 0.0
- UOPS_PORT_4: 0.0
- UOPS_PORT_5: 4.34

With an indexed addressing mode

With 1 independent instruction

With unroll_count=500 and no inner loop

Code:

   0:	4f 0f bc 04 2e       	bsf    r8,QWORD PTR [r14+r13*1]

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 1.0
- Core cycles: 1.0
- Reference cycles: 1.01
- RS_UOPS_DISPATCHED: 3.0
- UOPS_PORT_0: 0.5
- UOPS_PORT_1: 1.0
- UOPS_PORT_2: 1.0
- UOPS_PORT_3: 0.0
- UOPS_PORT_4: 0.0
- UOPS_PORT_5: 0.5

With loop_count=1000 and unroll_count=10

Code:

   0:	4f 0f bc 04 2e       	bsf    r8,QWORD PTR [r14+r13*1]

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 1.2
- Core cycles: 1.1
- Reference cycles: 1.1
- RS_UOPS_DISPATCHED: 3.2
- UOPS_PORT_0: 0.5
- UOPS_PORT_1: 1.09
- UOPS_PORT_2: 1.0
- UOPS_PORT_3: 0.0
- UOPS_PORT_4: 0.0
- UOPS_PORT_5: 0.61

With loop_count=100 and unroll_count=100

Code:

   0:	4f 0f bc 04 2e       	bsf    r8,QWORD PTR [r14+r13*1]

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 1.02
- Core cycles: 1.01
- Reference cycles: 1.01
- RS_UOPS_DISPATCHED: 3.02
- UOPS_PORT_0: 0.5
- UOPS_PORT_1: 1.01
- UOPS_PORT_2: 1.0
- UOPS_PORT_3: 0.0
- UOPS_PORT_4: 0.0
- UOPS_PORT_5: 0.51

With 4 independent instructions

With unroll_count=200 and no inner loop

Code:

   0:	4f 0f bc 04 2e       	bsf    r8,QWORD PTR [r14+r13*1]
   5:	4f 0f bc 4c 2e 08    	bsf    r9,QWORD PTR [r14+r13*1+0x8]
   b:	4f 0f bc 54 2e 10    	bsf    r10,QWORD PTR [r14+r13*1+0x10]
  11:	4f 0f bc 5c 2e 18    	bsf    r11,QWORD PTR [r14+r13*1+0x18]

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 4.0
- Core cycles: 4.01
- Reference cycles: 4.01
- RS_UOPS_DISPATCHED: 12.0
- UOPS_PORT_0: 1.84
- UOPS_PORT_1: 4.01
- UOPS_PORT_2: 4.0
- UOPS_PORT_3: 0.0
- UOPS_PORT_4: 0.0
- UOPS_PORT_5: 2.16

With loop_count=1000 and unroll_count=2

Code:

   0:	4f 0f bc 04 2e       	bsf    r8,QWORD PTR [r14+r13*1]
   5:	4f 0f bc 4c 2e 08    	bsf    r9,QWORD PTR [r14+r13*1+0x8]
   b:	4f 0f bc 54 2e 10    	bsf    r10,QWORD PTR [r14+r13*1+0x10]
  11:	4f 0f bc 5c 2e 18    	bsf    r11,QWORD PTR [r14+r13*1+0x18]

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 5.0
- Core cycles: 4.01
- Reference cycles: 4.01
- RS_UOPS_DISPATCHED: 13.01
- UOPS_PORT_0: 2.24
- UOPS_PORT_1: 4.0
- UOPS_PORT_2: 4.0
- UOPS_PORT_3: 0.0
- UOPS_PORT_4: 0.0
- UOPS_PORT_5: 2.76

With loop_count=100 and unroll_count=20

Code:

   0:	4f 0f bc 04 2e       	bsf    r8,QWORD PTR [r14+r13*1]
   5:	4f 0f bc 4c 2e 08    	bsf    r9,QWORD PTR [r14+r13*1+0x8]
   b:	4f 0f bc 54 2e 10    	bsf    r10,QWORD PTR [r14+r13*1+0x10]
  11:	4f 0f bc 5c 2e 18    	bsf    r11,QWORD PTR [r14+r13*1+0x18]

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 4.1
- Core cycles: 4.01
- Reference cycles: 4.01
- RS_UOPS_DISPATCHED: 12.11
- UOPS_PORT_0: 1.93
- UOPS_PORT_1: 4.0
- UOPS_PORT_2: 4.0
- UOPS_PORT_3: 0.0
- UOPS_PORT_4: 0.0
- UOPS_PORT_5: 2.17

With 8 independent instructions

With unroll_count=100 and no inner loop

Code:

   0:	4f 0f bc 04 2e       	bsf    r8,QWORD PTR [r14+r13*1]
   5:	4f 0f bc 4c 2e 08    	bsf    r9,QWORD PTR [r14+r13*1+0x8]
   b:	4f 0f bc 54 2e 10    	bsf    r10,QWORD PTR [r14+r13*1+0x10]
  11:	4f 0f bc 5c 2e 18    	bsf    r11,QWORD PTR [r14+r13*1+0x18]
  17:	4f 0f bc 64 2e 20    	bsf    r12,QWORD PTR [r14+r13*1+0x20]
  1d:	4b 0f bc 5c 2e 28    	bsf    rbx,QWORD PTR [r14+r13*1+0x28]
  23:	4b 0f bc 4c 2e 30    	bsf    rcx,QWORD PTR [r14+r13*1+0x30]
  29:	4b 0f bc 54 2e 38    	bsf    rdx,QWORD PTR [r14+r13*1+0x38]

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 8.0
- Core cycles: 8.01
- Reference cycles: 8.0
- RS_UOPS_DISPATCHED: 24.0
- UOPS_PORT_0: 3.71
- UOPS_PORT_1: 8.0
- UOPS_PORT_2: 8.0
- UOPS_PORT_3: 0.0
- UOPS_PORT_4: 0.0
- UOPS_PORT_5: 4.29

With loop_count=1000 and unroll_count=1

Code:

   0:	4f 0f bc 04 2e       	bsf    r8,QWORD PTR [r14+r13*1]
   5:	4f 0f bc 4c 2e 08    	bsf    r9,QWORD PTR [r14+r13*1+0x8]
   b:	4f 0f bc 54 2e 10    	bsf    r10,QWORD PTR [r14+r13*1+0x10]
  11:	4f 0f bc 5c 2e 18    	bsf    r11,QWORD PTR [r14+r13*1+0x18]
  17:	4f 0f bc 64 2e 20    	bsf    r12,QWORD PTR [r14+r13*1+0x20]
  1d:	4b 0f bc 5c 2e 28    	bsf    rbx,QWORD PTR [r14+r13*1+0x28]
  23:	4b 0f bc 4c 2e 30    	bsf    rcx,QWORD PTR [r14+r13*1+0x30]
  29:	4b 0f bc 54 2e 38    	bsf    rdx,QWORD PTR [r14+r13*1+0x38]

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 10.0
- Core cycles: 8.01
- Reference cycles: 8.02
- RS_UOPS_DISPATCHED: 26.02
- UOPS_PORT_0: 4.67
- UOPS_PORT_1: 8.01
- UOPS_PORT_2: 8.01
- UOPS_PORT_3: 0.0
- UOPS_PORT_4: 0.0
- UOPS_PORT_5: 5.33

With loop_count=100 and unroll_count=10

Code:

   0:	4f 0f bc 04 2e       	bsf    r8,QWORD PTR [r14+r13*1]
   5:	4f 0f bc 4c 2e 08    	bsf    r9,QWORD PTR [r14+r13*1+0x8]
   b:	4f 0f bc 54 2e 10    	bsf    r10,QWORD PTR [r14+r13*1+0x10]
  11:	4f 0f bc 5c 2e 18    	bsf    r11,QWORD PTR [r14+r13*1+0x18]
  17:	4f 0f bc 64 2e 20    	bsf    r12,QWORD PTR [r14+r13*1+0x20]
  1d:	4b 0f bc 5c 2e 28    	bsf    rbx,QWORD PTR [r14+r13*1+0x28]
  23:	4b 0f bc 4c 2e 30    	bsf    rcx,QWORD PTR [r14+r13*1+0x30]
  29:	4b 0f bc 54 2e 38    	bsf    rdx,QWORD PTR [r14+r13*1+0x38]

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 8.2
- Core cycles: 8.01
- Reference cycles: 8.02
- RS_UOPS_DISPATCHED: 24.22
- UOPS_PORT_0: 3.86
- UOPS_PORT_1: 8.01
- UOPS_PORT_2: 8.01
- UOPS_PORT_3: 0.0
- UOPS_PORT_4: 0.0
- UOPS_PORT_5: 4.34

BSF (R64, M64) - Throughput and Uops

With a non-indexed addressing mode

With 1 independent instruction

With unroll_count=500 and no inner loop

With loop_count=1000 and unroll_count=10

With loop_count=100 and unroll_count=100

With 4 independent instructions

With unroll_count=200 and no inner loop

With loop_count=1000 and unroll_count=2

With loop_count=100 and unroll_count=20

With 8 independent instructions

With unroll_count=100 and no inner loop

With loop_count=1000 and unroll_count=1

With loop_count=100 and unroll_count=10

With an indexed addressing mode

With 1 independent instruction

With unroll_count=500 and no inner loop

With loop_count=1000 and unroll_count=10

With loop_count=100 and unroll_count=100

With 4 independent instructions

With unroll_count=200 and no inner loop

With loop_count=1000 and unroll_count=2

With loop_count=100 and unroll_count=20

With 8 independent instructions

With unroll_count=100 and no inner loop

With loop_count=1000 and unroll_count=1

With loop_count=100 and unroll_count=10