LZCNT (R64, R64)

Experiment 1 (with R9=0)

Instruction: LZCNT R8, R9

Code:

   0:	f3 4d 0f bd c1       	lzcnt  r8,r9

Init:
```
MOV R9, 0
```
Show nanoBench command
Results:
- Instructions retired: 1.0
- Core cycles: 3.0
- Reference cycles: 2.88
- UOPS_EXECUTED.THREAD: 1.0

Experiment 2 (with R9=1)

Instruction: LZCNT R8, R9

Code:

   0:	f3 4d 0f bd c1       	lzcnt  r8,r9

Init:
```
MOV R9, 1
```
Show nanoBench command
Results:
- Instructions retired: 1.0
- Core cycles: 3.0
- Reference cycles: 2.99
- UOPS_EXECUTED.THREAD: 1.0

Experiment 3 (with R9=2)

Instruction: LZCNT R8, R9

Code:

   0:	f3 4d 0f bd c1       	lzcnt  r8,r9

Init:
```
MOV R9, 2
```
Show nanoBench command
Results:
- Instructions retired: 1.0
- Core cycles: 3.0
- Reference cycles: 2.88
- UOPS_EXECUTED.THREAD: 1.0

Experiment 4 (with R9=0)

Instruction: LZCNT R8, R9
Chain instructions: MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D
Chain latency: 7

Code:

   0:	f3 4d 0f bd c1       	lzcnt  r8,r9
   5:	4d 63 c0             	movsxd r8,r8d
   8:	4d 63 c0             	movsxd r8,r8d
   b:	4d 63 c0             	movsxd r8,r8d
   e:	4d 63 c0             	movsxd r8,r8d
  11:	4d 63 c0             	movsxd r8,r8d
  14:	4d 63 c0             	movsxd r8,r8d
  17:	4d 63 c0             	movsxd r8,r8d

Init:
```
MOV R9, 0
```
Show nanoBench command
Results:
- Instructions retired: 8.0
- Core cycles: 10.0
- Reference cycles: 9.92
- UOPS_EXECUTED.THREAD: 8.0

Experiment 5 (with R9=1)

Instruction: LZCNT R8, R9
Chain instructions: MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D
Chain latency: 7

Code:

   0:	f3 4d 0f bd c1       	lzcnt  r8,r9
   5:	4d 63 c0             	movsxd r8,r8d
   8:	4d 63 c0             	movsxd r8,r8d
   b:	4d 63 c0             	movsxd r8,r8d
   e:	4d 63 c0             	movsxd r8,r8d
  11:	4d 63 c0             	movsxd r8,r8d
  14:	4d 63 c0             	movsxd r8,r8d
  17:	4d 63 c0             	movsxd r8,r8d

Init:
```
MOV R9, 1
```
Show nanoBench command
Results:
- Instructions retired: 8.0
- Core cycles: 10.0
- Reference cycles: 9.92
- UOPS_EXECUTED.THREAD: 8.0

Experiment 6 (with R9=2)

Instruction: LZCNT R8, R9
Chain instructions: MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D
Chain latency: 7

Code:

   0:	f3 4d 0f bd c1       	lzcnt  r8,r9
   5:	4d 63 c0             	movsxd r8,r8d
   8:	4d 63 c0             	movsxd r8,r8d
   b:	4d 63 c0             	movsxd r8,r8d
   e:	4d 63 c0             	movsxd r8,r8d
  11:	4d 63 c0             	movsxd r8,r8d
  14:	4d 63 c0             	movsxd r8,r8d
  17:	4d 63 c0             	movsxd r8,r8d

Init:
```
MOV R9, 2
```
Show nanoBench command
Results:
- Instructions retired: 8.0
- Core cycles: 10.0
- Reference cycles: 9.6
- UOPS_EXECUTED.THREAD: 8.0

Latency operand 1 → 3: 3

Experiment 1 (with R9=0)

Instruction: LZCNT R8, R9
Chain instructions: CMOVC R15, R15;MOVSX R8, R15D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D
Chain latency: 9

Code:

   0:	f3 4d 0f bd c1       	lzcnt  r8,r9
   5:	4d 0f 42 ff          	cmovb  r15,r15
   9:	4d 63 c7             	movsxd r8,r15d
   c:	4d 63 c0             	movsxd r8,r8d
   f:	4d 63 c0             	movsxd r8,r8d
  12:	4d 63 c0             	movsxd r8,r8d
  15:	4d 63 c0             	movsxd r8,r8d
  18:	4d 63 c0             	movsxd r8,r8d
  1b:	4d 63 c0             	movsxd r8,r8d

Init:
```
MOV R9, 0
```
Show nanoBench command
Results:
- Instructions retired: 9.0
- Core cycles: 12.0
- Reference cycles: 11.52
- UOPS_EXECUTED.THREAD: 10.0

Experiment 2 (with R9=1)

Instruction: LZCNT R8, R9
Chain instructions: CMOVC R15, R15;MOVSX R8, R15D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D
Chain latency: 9

Code:

   0:	f3 4d 0f bd c1       	lzcnt  r8,r9
   5:	4d 0f 42 ff          	cmovb  r15,r15
   9:	4d 63 c7             	movsxd r8,r15d
   c:	4d 63 c0             	movsxd r8,r8d
   f:	4d 63 c0             	movsxd r8,r8d
  12:	4d 63 c0             	movsxd r8,r8d
  15:	4d 63 c0             	movsxd r8,r8d
  18:	4d 63 c0             	movsxd r8,r8d
  1b:	4d 63 c0             	movsxd r8,r8d

Init:
```
MOV R9, 1
```
Show nanoBench command
Results:
- Instructions retired: 9.0
- Core cycles: 12.0
- Reference cycles: 11.57
- UOPS_EXECUTED.THREAD: 10.0

Experiment 3 (with R9=2)

Instruction: LZCNT R8, R9
Chain instructions: CMOVC R15, R15;MOVSX R8, R15D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D
Chain latency: 9

Code:

   0:	f3 4d 0f bd c1       	lzcnt  r8,r9
   5:	4d 0f 42 ff          	cmovb  r15,r15
   9:	4d 63 c7             	movsxd r8,r15d
   c:	4d 63 c0             	movsxd r8,r8d
   f:	4d 63 c0             	movsxd r8,r8d
  12:	4d 63 c0             	movsxd r8,r8d
  15:	4d 63 c0             	movsxd r8,r8d
  18:	4d 63 c0             	movsxd r8,r8d
  1b:	4d 63 c0             	movsxd r8,r8d

Init:
```
MOV R9, 2
```
Show nanoBench command
Results:
- Instructions retired: 9.0
- Core cycles: 12.0
- Reference cycles: 11.52
- UOPS_EXECUTED.THREAD: 10.0

Experiment 4 (with R9=0)

Instruction: LZCNT R8, R9
Chain instructions: CMOVZ R15, R15;MOVSX R8, R15D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D
Chain latency: 9

Code:

   0:	f3 4d 0f bd c1       	lzcnt  r8,r9
   5:	4d 0f 44 ff          	cmove  r15,r15
   9:	4d 63 c7             	movsxd r8,r15d
   c:	4d 63 c0             	movsxd r8,r8d
   f:	4d 63 c0             	movsxd r8,r8d
  12:	4d 63 c0             	movsxd r8,r8d
  15:	4d 63 c0             	movsxd r8,r8d
  18:	4d 63 c0             	movsxd r8,r8d
  1b:	4d 63 c0             	movsxd r8,r8d

Init:
```
MOV R9, 0
```
Show nanoBench command
Results:
- Instructions retired: 9.0
- Core cycles: 12.0
- Reference cycles: 11.52
- UOPS_EXECUTED.THREAD: 10.0

Experiment 5 (with R9=1)

Instruction: LZCNT R8, R9
Chain instructions: CMOVZ R15, R15;MOVSX R8, R15D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D
Chain latency: 9

Code:

   0:	f3 4d 0f bd c1       	lzcnt  r8,r9
   5:	4d 0f 44 ff          	cmove  r15,r15
   9:	4d 63 c7             	movsxd r8,r15d
   c:	4d 63 c0             	movsxd r8,r8d
   f:	4d 63 c0             	movsxd r8,r8d
  12:	4d 63 c0             	movsxd r8,r8d
  15:	4d 63 c0             	movsxd r8,r8d
  18:	4d 63 c0             	movsxd r8,r8d
  1b:	4d 63 c0             	movsxd r8,r8d

Init:
```
MOV R9, 1
```
Show nanoBench command
Results:
- Instructions retired: 9.0
- Core cycles: 12.0
- Reference cycles: 13.23
- UOPS_EXECUTED.THREAD: 10.0

Experiment 6 (with R9=2)

Instruction: LZCNT R8, R9
Chain instructions: CMOVZ R15, R15;MOVSX R8, R15D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D
Chain latency: 9

Code:

   0:	f3 4d 0f bd c1       	lzcnt  r8,r9
   5:	4d 0f 44 ff          	cmove  r15,r15
   9:	4d 63 c7             	movsxd r8,r15d
   c:	4d 63 c0             	movsxd r8,r8d
   f:	4d 63 c0             	movsxd r8,r8d
  12:	4d 63 c0             	movsxd r8,r8d
  15:	4d 63 c0             	movsxd r8,r8d
  18:	4d 63 c0             	movsxd r8,r8d
  1b:	4d 63 c0             	movsxd r8,r8d

Init:
```
MOV R9, 2
```
Show nanoBench command
Results:
- Instructions retired: 9.0
- Core cycles: 12.0
- Reference cycles: 13.28
- UOPS_EXECUTED.THREAD: 10.0

Latency operand 2 → 1: 3

Latency operand 2 → 3: 3

Experiment 1

Instruction: LZCNT R9, R8
Chain instructions: CMOVC R15, R15;MOVSX R8, R15D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D
Chain latency: 9

Code:

   0:	f3 4d 0f bd c8       	lzcnt  r9,r8
   5:	4d 0f 42 ff          	cmovb  r15,r15
   9:	4d 63 c7             	movsxd r8,r15d
   c:	4d 63 c0             	movsxd r8,r8d
   f:	4d 63 c0             	movsxd r8,r8d
  12:	4d 63 c0             	movsxd r8,r8d
  15:	4d 63 c0             	movsxd r8,r8d
  18:	4d 63 c0             	movsxd r8,r8d
  1b:	4d 63 c0             	movsxd r8,r8d

Show nanoBench command
Results:
- Instructions retired: 9.0
- Core cycles: 12.0
- Reference cycles: 13.33
- UOPS_EXECUTED.THREAD: 10.0

Experiment 2

Instruction: LZCNT R9, R8
Chain instructions: CMOVZ R15, R15;MOVSX R8, R15D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D
Chain latency: 9

Code:

   0:	f3 4d 0f bd c8       	lzcnt  r9,r8
   5:	4d 0f 44 ff          	cmove  r15,r15
   9:	4d 63 c7             	movsxd r8,r15d
   c:	4d 63 c0             	movsxd r8,r8d
   f:	4d 63 c0             	movsxd r8,r8d
  12:	4d 63 c0             	movsxd r8,r8d
  15:	4d 63 c0             	movsxd r8,r8d
  18:	4d 63 c0             	movsxd r8,r8d
  1b:	4d 63 c0             	movsxd r8,r8d

Show nanoBench command
Results:
- Instructions retired: 9.0
- Core cycles: 12.0
- Reference cycles: 13.28
- UOPS_EXECUTED.THREAD: 10.0

LZCNT (R64, R64) - Latency

Operands

Latency operand 1 → 1: 3

Latency operand 1 → 3: 3

Latency operand 2 → 1: 3

Latency operand 2 → 3: 3

Latency operand 1 → 1: 3

Experiment 1 (with R9=0)

Experiment 2 (with R9=1)

Experiment 3 (with R9=2)

Experiment 4 (with R9=0)

Experiment 5 (with R9=1)

Experiment 6 (with R9=2)

Latency operand 1 → 3: 3

Experiment 1 (with R9=0)

Experiment 2 (with R9=1)

Experiment 3 (with R9=2)

Experiment 4 (with R9=0)

Experiment 5 (with R9=1)

Experiment 6 (with R9=2)

Latency operand 2 → 1: 3

Experiment 1

Latency operand 2 → 3: 3

Experiment 1

Experiment 2