INC (R64) - Latency

Experiment 1

• Instruction: INC R8
• Code:

     0:	49 ff c0             	inc    r8
  

• Show nanoBench command
• Results:
  • Instructions retired: 1.0
  • Core cycles: 1.01
  • Reference cycles: 1.04
  • UOPS_EXECUTED.THREAD: 1.0

Experiment 2

• Instruction: INC R8
• Chain instructions: MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D
• Chain latency: 5
• Code:

     0:	49 ff c0             	inc    r8
     3:	4d 63 c0             	movsxd r8,r8d
     6:	4d 63 c0             	movsxd r8,r8d
     9:	4d 63 c0             	movsxd r8,r8d
     c:	4d 63 c0             	movsxd r8,r8d
     f:	4d 63 c0             	movsxd r8,r8d
  

• Show nanoBench command
• Results:
  • Instructions retired: 6.0
  • Core cycles: 6.0
  • Reference cycles: 2.95
  • UOPS_EXECUTED.THREAD: 6.0

Experiment 1

• Instruction: INC R8
• Chain instructions: CMOVP R15, R15;MOVSX R8, R15D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D
• Chain latency: 6
• Code:

     0:	49 ff c0             	inc    r8
     3:	4d 0f 4a ff          	cmovp  r15,r15
     7:	4d 63 c7             	movsxd r8,r15d
     a:	4d 63 c0             	movsxd r8,r8d
     d:	4d 63 c0             	movsxd r8,r8d
    10:	4d 63 c0             	movsxd r8,r8d
    13:	4d 63 c0             	movsxd r8,r8d
  

• Show nanoBench command
• Results:
  • Instructions retired: 7.0
  • Core cycles: 7.0
  • Reference cycles: 3.29
  • UOPS_EXECUTED.THREAD: 7.0

Experiment 2

• Instruction: INC R8
• Chain instructions: CMOVZ R15, R15;MOVSX R8, R15D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D
• Chain latency: 6
• Code:

     0:	49 ff c0             	inc    r8
     3:	4d 0f 44 ff          	cmove  r15,r15
     7:	4d 63 c7             	movsxd r8,r15d
     a:	4d 63 c0             	movsxd r8,r8d
     d:	4d 63 c0             	movsxd r8,r8d
    10:	4d 63 c0             	movsxd r8,r8d
    13:	4d 63 c0             	movsxd r8,r8d
  

• Show nanoBench command
• Results:
  • Instructions retired: 7.0
  • Core cycles: 7.0
  • Reference cycles: 3.29
  • UOPS_EXECUTED.THREAD: 7.0

Experiment 3

• Instruction: INC R8
• Chain instructions: CMOVS R15, R15;MOVSX R8, R15D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D
• Chain latency: 6
• Code:

     0:	49 ff c0             	inc    r8
     3:	4d 0f 48 ff          	cmovs  r15,r15
     7:	4d 63 c7             	movsxd r8,r15d
     a:	4d 63 c0             	movsxd r8,r8d
     d:	4d 63 c0             	movsxd r8,r8d
    10:	4d 63 c0             	movsxd r8,r8d
    13:	4d 63 c0             	movsxd r8,r8d
  

• Show nanoBench command
• Results:
  • Instructions retired: 7.0
  • Core cycles: 7.0
  • Reference cycles: 3.47
  • UOPS_EXECUTED.THREAD: 7.0

Experiment 4

• Instruction: INC R8
• Chain instructions: CMOVO R15, R15;MOVSX R8, R15D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D;MOVSX R8, R8D
• Chain latency: 6
• Code:

     0:	49 ff c0             	inc    r8
     3:	4d 0f 40 ff          	cmovo  r15,r15
     7:	4d 63 c7             	movsxd r8,r15d
     a:	4d 63 c0             	movsxd r8,r8d
     d:	4d 63 c0             	movsxd r8,r8d
    10:	4d 63 c0             	movsxd r8,r8d
    13:	4d 63 c0             	movsxd r8,r8d
  

• Show nanoBench command
• Results:
  • Instructions retired: 7.0
  • Core cycles: 7.0
  • Reference cycles: 3.64
  • UOPS_EXECUTED.THREAD: 7.0