RDRAND (R64) - Throughput and Uops

With 1 independent instruction

With unroll_count=10 and no inner loop

Code:
```
   0:	49 0f c7 f0          	rdrand r8
```
Show nanoBench command
Results:
- Instructions retired: 1.0
- Core cycles: 118.9
- Reference cycles: 72.0
- UOPS_EXECUTED.THREAD: 21.0
- RETIRE_SLOTS: 24.0
- UOPS_MITE: 0.4
- UOPS_MS: 23.95
- UOPS_PORT_0: 5.0
- UOPS_PORT_1: 7.4
- UOPS_PORT_6: 6.6
- UOPS_PORT_49: 0.0
- UOPS_PORT_78: 0.0
- UOPS_PORT_5B: 3.2
- UOPS_PORT_5B>=2: 0.0
- UOPS_PORT_23A: 1.0
- DIV_CYCLES: 0.0
- ILD_STALL.LCP: 0.0
- UOPS_MITE>=1: 0.08

With unroll_count=10, no inner loop, and 1 NOP

Code:

   0:	49 0f c7 f0          	rdrand r8
   4:	90                   	nop

Show nanoBench command
Results:
- Instructions retired: 2.0
- Core cycles: 117.57
- Reference cycles: 70.67
- UOPS_EXECUTED.THREAD: 21.0
- RETIRE_SLOTS: 25.0
- UOPS_MITE: 1.5
- UOPS_MS: 24.0
- UOPS_PORT_0: 3.2
- UOPS_PORT_1: 9.2
- UOPS_PORT_6: 5.7
- UOPS_PORT_49: 0.0
- UOPS_PORT_78: 0.0
- UOPS_PORT_5B: 4.1
- UOPS_PORT_5B>=2: 0.8
- UOPS_PORT_23A: 1.0
- DIV_CYCLES: 0.0
- ILD_STALL.LCP: 0.0
- UOPS_MITE>=1: 1.1

With loop_count=10 and unroll_count=1

Code:
```
   0:	49 0f c7 f0          	rdrand r8
```
Show nanoBench command
Results:
- Instructions retired: 3.0
- Core cycles: 118.65
- Reference cycles: 72.0
- UOPS_EXECUTED.THREAD: 22.4
- RETIRE_SLOTS: 27.13
- UOPS_MITE: 0.92
- UOPS_MS: 11.18
- UOPS_PORT_0: 4.1
- UOPS_PORT_1: 8.67
- UOPS_PORT_6: 5.8
- UOPS_PORT_49: 0.0
- UOPS_PORT_78: 0.0
- UOPS_PORT_5B: 4.9
- UOPS_PORT_5B>=2: 0.8
- UOPS_PORT_23A: 1.0
- DIV_CYCLES: 0.0
- ILD_STALL.LCP: 0.0
- UOPS_MITE>=1: 0.78