BSR (R64, M64)

With unroll_count=500 and no inner loop

Code:

   0:	4d 0f bd 06          	bsr    r8,QWORD PTR [r14]

Show nanoBench command
Results:
- Instructions retired: 1.0
- Core cycles: 10.0
- Reference cycles: 4.99
- UOPS_RETIRED.ALL: 10.0
- UOPS_MS: 10.0

With loop_count=1000 and unroll_count=10

Code:

   0:	4d 0f bd 06          	bsr    r8,QWORD PTR [r14]

Show nanoBench command
Results:
- Instructions retired: 1.2
- Core cycles: 10.1
- Reference cycles: 5.05
- UOPS_RETIRED.ALL: 10.2
- UOPS_MS: 10.0

With loop_count=100 and unroll_count=100

Code:

   0:	4d 0f bd 06          	bsr    r8,QWORD PTR [r14]

Show nanoBench command
Results:
- Instructions retired: 1.02
- Core cycles: 10.01
- Reference cycles: 5.0
- UOPS_RETIRED.ALL: 10.02
- UOPS_MS: 10.0

With 4 independent instructions

With unroll_count=200 and no inner loop

Code:

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

Show nanoBench command
Results:
- Instructions retired: 4.0
- Core cycles: 40.0
- Reference cycles: 20.02
- UOPS_RETIRED.ALL: 40.0
- UOPS_MS: 40.0

With loop_count=1000 and unroll_count=2

Code:

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

Show nanoBench command
Results:
- Instructions retired: 5.0
- Core cycles: 40.5
- Reference cycles: 20.25
- UOPS_RETIRED.ALL: 41.0
- UOPS_MS: 40.0

With loop_count=100 and unroll_count=20

Code:

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

Show nanoBench command
Results:
- Instructions retired: 4.1
- Core cycles: 40.05
- Reference cycles: 20.03
- UOPS_RETIRED.ALL: 40.1
- UOPS_MS: 40.0

With 8 independent instructions

With unroll_count=100 and no inner loop

Code:

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

Show nanoBench command
Results:
- Instructions retired: 8.0
- Core cycles: 80.0
- Reference cycles: 40.02
- UOPS_RETIRED.ALL: 80.0
- UOPS_MS: 80.0

With loop_count=1000 and unroll_count=1

Code:

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

Show nanoBench command
Results:
- Instructions retired: 10.0
- Core cycles: 80.99
- Reference cycles: 40.5
- UOPS_RETIRED.ALL: 82.0
- UOPS_MS: 80.0

With loop_count=100 and unroll_count=10

Code:

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

Show nanoBench command
Results:
- Instructions retired: 8.2
- Core cycles: 80.09
- Reference cycles: 40.05
- UOPS_RETIRED.ALL: 80.2
- UOPS_MS: 80.0

With an indexed addressing mode

With 1 independent instruction

With unroll_count=500 and no inner loop

Code:

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

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 1.0
- Core cycles: 10.0
- Reference cycles: 5.0
- UOPS_RETIRED.ALL: 10.0
- UOPS_MS: 10.0

With loop_count=1000 and unroll_count=10

Code:

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

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 1.2
- Core cycles: 10.1
- Reference cycles: 5.05
- UOPS_RETIRED.ALL: 10.2
- UOPS_MS: 10.0

With loop_count=100 and unroll_count=100

Code:

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

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 1.02
- Core cycles: 10.01
- Reference cycles: 5.0
- UOPS_RETIRED.ALL: 10.02
- UOPS_MS: 10.0

With 4 independent instructions

With unroll_count=200 and no inner loop

Code:

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

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 4.0
- Core cycles: 40.0
- Reference cycles: 20.01
- UOPS_RETIRED.ALL: 40.0
- UOPS_MS: 40.0

With loop_count=1000 and unroll_count=2

Code:

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

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 5.0
- Core cycles: 40.5
- Reference cycles: 20.25
- UOPS_RETIRED.ALL: 41.0
- UOPS_MS: 40.0

With loop_count=100 and unroll_count=20

Code:

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

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 4.1
- Core cycles: 40.05
- Reference cycles: 20.02
- UOPS_RETIRED.ALL: 40.1
- UOPS_MS: 40.0

With 8 independent instructions

With unroll_count=100 and no inner loop

Code:

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

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 8.0
- Core cycles: 80.0
- Reference cycles: 40.02
- UOPS_RETIRED.ALL: 80.0
- UOPS_MS: 80.0

With loop_count=1000 and unroll_count=1

Code:

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

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 10.0
- Core cycles: 80.99
- Reference cycles: 40.49
- UOPS_RETIRED.ALL: 82.0
- UOPS_MS: 80.0

With loop_count=100 and unroll_count=10

Code:

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

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 8.2
- Core cycles: 80.09
- Reference cycles: 40.05
- UOPS_RETIRED.ALL: 80.2
- UOPS_MS: 80.0

BSR (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