ADD (AX, I16) - Latency

Experiment 1

• Instruction: ADD AX, 256
• Code:

     0:	66 05 00 01          	add    ax,0x100
  

• Show nanoBench command
• Results:
  • Instructions retired: 1.0
  • Core cycles: 1.0
  • Reference cycles: 1.12
  • UOPS_RETIRED.ALL: 1.0

Experiment 2

• Instruction: ADD AX, 256
• Chain instructions: MOVSX RAX, AX;MOVSX RAX, EAX;MOVSX RAX, EAX;MOVSX RAX, EAX;MOVSX RAX, EAX
• Chain latency: 5
• Code:

     0:	66 05 00 01          	add    ax,0x100
     4:	48 0f bf c0          	movsx  rax,ax
     8:	48 63 c0             	movsxd rax,eax
     b:	48 63 c0             	movsxd rax,eax
     e:	48 63 c0             	movsxd rax,eax
    11:	48 63 c0             	movsxd rax,eax
  

• Show nanoBench command
• Results:
  • Instructions retired: 6.0
  • Core cycles: 6.0
  • Reference cycles: 6.08
  • UOPS_RETIRED.ALL: 6.0

Experiment 1

• Instruction: ADD AX, 256
• Chain instructions: CMOVC R15W, R15W;MOVSX RAX, R15W;MOVSX RAX, AX;MOVSX RAX, AX;MOVSX RAX, AX;MOVSX RAX, AX
• Chain latency: 7
• Code:

     0:	66 05 00 01          	add    ax,0x100
     4:	66 45 0f 42 ff       	cmovb  r15w,r15w
     9:	49 0f bf c7          	movsx  rax,r15w
     d:	48 0f bf c0          	movsx  rax,ax
    11:	48 0f bf c0          	movsx  rax,ax
    15:	48 0f bf c0          	movsx  rax,ax
    19:	48 0f bf c0          	movsx  rax,ax
  

• Show nanoBench command
• Results:
  • Instructions retired: 7.0
  • Core cycles: 8.0
  • Reference cycles: 8.16
  • UOPS_RETIRED.ALL: 7.0

Experiment 2

• Instruction: ADD AX, 256
• Chain instructions: CMOVS R15W, R15W;MOVSX RAX, R15W;MOVSX RAX, AX;MOVSX RAX, AX;MOVSX RAX, AX;MOVSX RAX, AX
• Chain latency: 7
• Code:

     0:	66 05 00 01          	add    ax,0x100
     4:	66 45 0f 48 ff       	cmovs  r15w,r15w
     9:	49 0f bf c7          	movsx  rax,r15w
     d:	48 0f bf c0          	movsx  rax,ax
    11:	48 0f bf c0          	movsx  rax,ax
    15:	48 0f bf c0          	movsx  rax,ax
    19:	48 0f bf c0          	movsx  rax,ax
  

• Show nanoBench command
• Results:
  • Instructions retired: 7.0
  • Core cycles: 8.0
  • Reference cycles: 8.32
  • UOPS_RETIRED.ALL: 7.0

Experiment 3

• Instruction: ADD AX, 256
• Chain instructions: CMOVO R15W, R15W;MOVSX RAX, R15W;MOVSX RAX, AX;MOVSX RAX, AX;MOVSX RAX, AX;MOVSX RAX, AX
• Chain latency: 7
• Code:

     0:	66 05 00 01          	add    ax,0x100
     4:	66 45 0f 40 ff       	cmovo  r15w,r15w
     9:	49 0f bf c7          	movsx  rax,r15w
     d:	48 0f bf c0          	movsx  rax,ax
    11:	48 0f bf c0          	movsx  rax,ax
    15:	48 0f bf c0          	movsx  rax,ax
    19:	48 0f bf c0          	movsx  rax,ax
  

• Show nanoBench command
• Results:
  • Instructions retired: 7.0
  • Core cycles: 8.0
  • Reference cycles: 8.16
  • UOPS_RETIRED.ALL: 7.0

Experiment 4

• Instruction: ADD AX, 256
• Chain instructions: CMOVP R15W, R15W;MOVSX RAX, R15W;MOVSX RAX, AX;MOVSX RAX, AX;MOVSX RAX, AX;MOVSX RAX, AX
• Chain latency: 7
• Code:

     0:	66 05 00 01          	add    ax,0x100
     4:	66 45 0f 4a ff       	cmovp  r15w,r15w
     9:	49 0f bf c7          	movsx  rax,r15w
     d:	48 0f bf c0          	movsx  rax,ax
    11:	48 0f bf c0          	movsx  rax,ax
    15:	48 0f bf c0          	movsx  rax,ax
    19:	48 0f bf c0          	movsx  rax,ax
  

• Show nanoBench command
• Results:
  • Instructions retired: 7.0
  • Core cycles: 8.0
  • Reference cycles: 8.32
  • UOPS_RETIRED.ALL: 7.0

Experiment 5

• Instruction: ADD AX, 256
• Chain instructions: CMOVZ R15W, R15W;MOVSX RAX, R15W;MOVSX RAX, AX;MOVSX RAX, AX;MOVSX RAX, AX;MOVSX RAX, AX
• Chain latency: 7
• Code:

     0:	66 05 00 01          	add    ax,0x100
     4:	66 45 0f 44 ff       	cmove  r15w,r15w
     9:	49 0f bf c7          	movsx  rax,r15w
     d:	48 0f bf c0          	movsx  rax,ax
    11:	48 0f bf c0          	movsx  rax,ax
    15:	48 0f bf c0          	movsx  rax,ax
    19:	48 0f bf c0          	movsx  rax,ax
  

• Show nanoBench command
• Results:
  • Instructions retired: 7.0
  • Core cycles: 8.0
  • Reference cycles: 8.32
  • UOPS_RETIRED.ALL: 7.0