MOVSXD (R64, M32) - Latency

Operands

Operand 1 (w): Register (RAX, RCX, RDX, RBX, RSP, RBP, RSI, RDI, R8, R9, R10, R11, R12, R13, R14, R15)
Operand 2 (r): Memory

Latency operand 2 → 1 (address, base register): 5

Latency operand 2 → 1 (address, index register): 5

Latency operand 2 → 1 (memory): ≤4

Latency operand 2 → 1 (address, base register): 5

Experiment 1

Instruction: MOVSXD R8, dword ptr [R14]
Chain instructions: MOVSX R8, R8D;XOR R14, R8;XOR R14, R8;XOR R14, R8;XOR R14, R8
Chain latency: 5

Code:

   0:	4d 63 06             	movsxd r8,DWORD PTR [r14]
   3:	4d 63 c0             	movsxd r8,r8d
   6:	4d 31 c6             	xor    r14,r8
   9:	4d 31 c6             	xor    r14,r8
   c:	4d 31 c6             	xor    r14,r8
   f:	4d 31 c6             	xor    r14,r8

Show nanoBench command
Results:
- Instructions retired: 6.0
- Core cycles: 10.0
- Reference cycles: 9.09
- UOPS_EXECUTED.THREAD: 6.0

Latency operand 2 → 1 (address, index register): 5

Experiment 1

Instruction: MOVSXD R8, dword ptr [R14+R13]
Chain instructions: MOVSX R8, R8D;XOR R13, R8;XOR R13, R8;XOR R13, R8;XOR R13, R8
Chain latency: 5

Code:

   0:	4f 63 04 2e          	movsxd r8,DWORD PTR [r14+r13*1]
   4:	4d 63 c0             	movsxd r8,r8d
   7:	4d 31 c5             	xor    r13,r8
   a:	4d 31 c5             	xor    r13,r8
   d:	4d 31 c5             	xor    r13,r8
  10:	4d 31 c5             	xor    r13,r8

Init:
```
XOR R13, R13
```
Show nanoBench command
Results:
- Instructions retired: 6.0
- Core cycles: 10.0
- Reference cycles: 8.65
- UOPS_EXECUTED.THREAD: 6.0

Latency operand 2 → 1 (memory): ≤4

Experiment 1

Instruction: MOVSXD R8, dword ptr [R14]
Chain instructions: MOVSX R12, R8D;MOVSX R12, R12d;MOVSX R12, R12d;MOVSX R12, R12d;mov [R14], R12D
Chain latency: ≥5

Code:

   0:	4d 63 06             	movsxd r8,DWORD PTR [r14]
   3:	4d 63 e0             	movsxd r12,r8d
   6:	4d 63 e4             	movsxd r12,r12d
   9:	4d 63 e4             	movsxd r12,r12d
   c:	4d 63 e4             	movsxd r12,r12d
   f:	45 89 26             	mov    DWORD PTR [r14],r12d

Show nanoBench command
Results:
- Instructions retired: 6.0
- Core cycles: 9.0
- Reference cycles: 7.98
- UOPS_EXECUTED.THREAD: 7.0