ADD (AL, I8) - Latency

Experiment 1

• Instruction: ADD AL, 2
• Code:

     0:	04 02                	add    al,0x2
  

• Show nanoBench command
• Results:
  • Instructions retired: 1.0
  • Core cycles: 1.0
  • Reference cycles: 0.44
  • UOPS_EXECUTED.THREAD: 1.0

Experiment 2

• Instruction: ADD AL, 2
• Chain instructions: MOVSX RAX, AL;MOVSX RAX, EAX;MOVSX RAX, EAX;MOVSX RAX, EAX;MOVSX RAX, EAX
• Chain latency: 5
• Code:

     0:	04 02                	add    al,0x2
     2:	48 0f be c0          	movsx  rax,al
     6:	48 63 c0             	movsxd rax,eax
     9:	48 63 c0             	movsxd rax,eax
     c:	48 63 c0             	movsxd rax,eax
     f:	48 63 c0             	movsxd rax,eax
  

• Show nanoBench command
• Results:
  • Instructions retired: 6.0
  • Core cycles: 6.0
  • Reference cycles: 5.32
  • UOPS_EXECUTED.THREAD: 6.0

Experiment 1

• Instruction: ADD AL, 2
• Chain instructions: SETZ AL;MOVSX RAX, AL;MOVSX RAX, AL;MOVSX RAX, AL;MOVSX RAX, AL
• Chain latency: 5
• Code:

     0:	04 02                	add    al,0x2
     2:	0f 94 c0             	sete   al
     5:	48 0f be c0          	movsx  rax,al
     9:	48 0f be c0          	movsx  rax,al
     d:	48 0f be c0          	movsx  rax,al
    11:	48 0f be c0          	movsx  rax,al
  

• Show nanoBench command
• Results:
  • Instructions retired: 6.0
  • Core cycles: 6.0
  • Reference cycles: 5.32
  • UOPS_EXECUTED.THREAD: 6.0

Experiment 2

• Instruction: ADD AL, 2
• Chain instructions: SETO AL;MOVSX RAX, AL;MOVSX RAX, AL;MOVSX RAX, AL;MOVSX RAX, AL
• Chain latency: 5
• Code:

     0:	04 02                	add    al,0x2
     2:	0f 90 c0             	seto   al
     5:	48 0f be c0          	movsx  rax,al
     9:	48 0f be c0          	movsx  rax,al
     d:	48 0f be c0          	movsx  rax,al
    11:	48 0f be c0          	movsx  rax,al
  

• Show nanoBench command
• Results:
  • Instructions retired: 6.0
  • Core cycles: 6.0
  • Reference cycles: 5.32
  • UOPS_EXECUTED.THREAD: 6.0

Experiment 3

• Instruction: ADD AL, 2
• Chain instructions: SETC AL;MOVSX RAX, AL;MOVSX RAX, AL;MOVSX RAX, AL;MOVSX RAX, AL
• Chain latency: 5
• Code:

     0:	04 02                	add    al,0x2
     2:	0f 92 c0             	setb   al
     5:	48 0f be c0          	movsx  rax,al
     9:	48 0f be c0          	movsx  rax,al
     d:	48 0f be c0          	movsx  rax,al
    11:	48 0f be c0          	movsx  rax,al
  

• Show nanoBench command
• Results:
  • Instructions retired: 6.0
  • Core cycles: 6.0
  • Reference cycles: 5.32
  • UOPS_EXECUTED.THREAD: 6.0

Experiment 4

• Instruction: ADD AL, 2
• Chain instructions: SETP AL;MOVSX RAX, AL;MOVSX RAX, AL;MOVSX RAX, AL;MOVSX RAX, AL
• Chain latency: 5
• Code:

     0:	04 02                	add    al,0x2
     2:	0f 9a c0             	setp   al
     5:	48 0f be c0          	movsx  rax,al
     9:	48 0f be c0          	movsx  rax,al
     d:	48 0f be c0          	movsx  rax,al
    11:	48 0f be c0          	movsx  rax,al
  

• Show nanoBench command
• Results:
  • Instructions retired: 6.0
  • Core cycles: 6.0
  • Reference cycles: 6.65
  • UOPS_EXECUTED.THREAD: 6.0

Experiment 5

• Instruction: ADD AL, 2
• Chain instructions: SETS AL;MOVSX RAX, AL;MOVSX RAX, AL;MOVSX RAX, AL;MOVSX RAX, AL
• Chain latency: 5
• Code:

     0:	04 02                	add    al,0x2
     2:	0f 98 c0             	sets   al
     5:	48 0f be c0          	movsx  rax,al
     9:	48 0f be c0          	movsx  rax,al
     d:	48 0f be c0          	movsx  rax,al
    11:	48 0f be c0          	movsx  rax,al
  

• Show nanoBench command
• Results:
  • Instructions retired: 6.0
  • Core cycles: 6.0
  • Reference cycles: 5.32
  • UOPS_EXECUTED.THREAD: 6.0