XADD_LOCK (M8, R8h)

With unroll_count=500 and no inner loop

Code:

   0:	f0 0f c0 3f          	lock xadd BYTE PTR [rdi],bh

Init:
```
MOV BH, 0
```
Show nanoBench command
Results:
- MPERF: 14.89
- APERF: 17.69
- UOPS: 4.0
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- DIV_CYCLES: 0.0

With loop_count=1000 and unroll_count=10

Code:

   0:	f0 0f c0 3f          	lock xadd BYTE PTR [rdi],bh

Init:
```
MOV BH, 0
```
Show nanoBench command
Results:
- MPERF: 14.88
- APERF: 17.67
- UOPS: 4.2
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- DIV_CYCLES: 0.0

With loop_count=100 and unroll_count=100

Code:

   0:	f0 0f c0 3f          	lock xadd BYTE PTR [rdi],bh

Init:
```
MOV BH, 0
```
Show nanoBench command
Results:
- MPERF: 14.89
- APERF: 17.68
- UOPS: 4.02
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- DIV_CYCLES: 0.0

With 4 independent instructions

With unroll_count=200 and no inner loop

Code:

   0:	f0 0f c0 3f          	lock xadd BYTE PTR [rdi],bh
   4:	f0 0f c0 6f 01       	lock xadd BYTE PTR [rdi+0x1],ch
   9:	f0 0f c0 77 02       	lock xadd BYTE PTR [rdi+0x2],dh
   e:	f0 0f c0 67 03       	lock xadd BYTE PTR [rdi+0x3],ah

Init:

MOV BH, 0;
MOV CH, 0;
MOV DH, 0;
MOV AH, 0

Show nanoBench command
Results:
- MPERF: 59.25
- APERF: 70.77
- UOPS: 16.0
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- DIV_CYCLES: 0.0

With loop_count=1000 and unroll_count=2

Code:

   0:	f0 0f c0 3f          	lock xadd BYTE PTR [rdi],bh
   4:	f0 0f c0 6f 01       	lock xadd BYTE PTR [rdi+0x1],ch
   9:	f0 0f c0 77 02       	lock xadd BYTE PTR [rdi+0x2],dh
   e:	f0 0f c0 67 03       	lock xadd BYTE PTR [rdi+0x3],ah

Init:

MOV BH, 0;
MOV CH, 0;
MOV DH, 0;
MOV AH, 0

Show nanoBench command
Results:
- MPERF: 59.54
- APERF: 70.7
- UOPS: 17.0
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- DIV_CYCLES: 0.0

With loop_count=100 and unroll_count=20

Code:

   0:	f0 0f c0 3f          	lock xadd BYTE PTR [rdi],bh
   4:	f0 0f c0 6f 01       	lock xadd BYTE PTR [rdi+0x1],ch
   9:	f0 0f c0 77 02       	lock xadd BYTE PTR [rdi+0x2],dh
   e:	f0 0f c0 67 03       	lock xadd BYTE PTR [rdi+0x3],ah

Init:

MOV BH, 0;
MOV CH, 0;
MOV DH, 0;
MOV AH, 0

Show nanoBench command
Results:
- MPERF: 59.23
- APERF: 70.74
- UOPS: 16.1
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- DIV_CYCLES: 0.0

With an indexed addressing mode

With 1 independent instruction

With unroll_count=500 and no inner loop

Code:

   0:	f0 0f c0 3c 37       	lock xadd BYTE PTR [rdi+rsi*1],bh

Init:
```
MOV BH, 0;
XOR RSI, RSI
```
Show nanoBench command
Results:
- MPERF: 14.9
- APERF: 17.69
- UOPS: 4.0
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- DIV_CYCLES: 0.0

With loop_count=1000 and unroll_count=10

Code:

   0:	f0 0f c0 3c 37       	lock xadd BYTE PTR [rdi+rsi*1],bh

Init:
```
MOV BH, 0;
XOR RSI, RSI
```
Show nanoBench command
Results:
- MPERF: 14.88
- APERF: 17.67
- UOPS: 4.2
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- DIV_CYCLES: 0.0

With loop_count=100 and unroll_count=100

Code:

   0:	f0 0f c0 3c 37       	lock xadd BYTE PTR [rdi+rsi*1],bh

Init:
```
MOV BH, 0;
XOR RSI, RSI
```
Show nanoBench command
Results:
- MPERF: 14.89
- APERF: 17.68
- UOPS: 4.02
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- DIV_CYCLES: 0.0

With 4 independent instructions

With unroll_count=200 and no inner loop

Code:

   0:	f0 0f c0 3c 37       	lock xadd BYTE PTR [rdi+rsi*1],bh
   5:	f0 0f c0 6c 37 01    	lock xadd BYTE PTR [rdi+rsi*1+0x1],ch
   b:	f0 0f c0 74 37 02    	lock xadd BYTE PTR [rdi+rsi*1+0x2],dh
  11:	f0 0f c0 64 37 03    	lock xadd BYTE PTR [rdi+rsi*1+0x3],ah

Init:

MOV BH, 0;
XOR RSI, RSI;
MOV CH, 0;
MOV DH, 0;
MOV AH, 0

Show nanoBench command
Results:
- MPERF: 59.58
- APERF: 70.77
- UOPS: 16.0
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- DIV_CYCLES: 0.0

With loop_count=1000 and unroll_count=2

Code:

   0:	f0 0f c0 3c 37       	lock xadd BYTE PTR [rdi+rsi*1],bh
   5:	f0 0f c0 6c 37 01    	lock xadd BYTE PTR [rdi+rsi*1+0x1],ch
   b:	f0 0f c0 74 37 02    	lock xadd BYTE PTR [rdi+rsi*1+0x2],dh
  11:	f0 0f c0 64 37 03    	lock xadd BYTE PTR [rdi+rsi*1+0x3],ah

Init:

MOV BH, 0;
XOR RSI, RSI;
MOV CH, 0;
MOV DH, 0;
MOV AH, 0

Show nanoBench command
Results:
- MPERF: 59.53
- APERF: 70.7
- UOPS: 17.0
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- DIV_CYCLES: 0.0

With loop_count=100 and unroll_count=20

Code:

   0:	f0 0f c0 3c 37       	lock xadd BYTE PTR [rdi+rsi*1],bh
   5:	f0 0f c0 6c 37 01    	lock xadd BYTE PTR [rdi+rsi*1+0x1],ch
   b:	f0 0f c0 74 37 02    	lock xadd BYTE PTR [rdi+rsi*1+0x2],dh
  11:	f0 0f c0 64 37 03    	lock xadd BYTE PTR [rdi+rsi*1+0x3],ah

Init:

MOV BH, 0;
XOR RSI, RSI;
MOV CH, 0;
MOV DH, 0;
MOV AH, 0

Show nanoBench command
Results:
- MPERF: 59.58
- APERF: 70.74
- UOPS: 16.1
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- DIV_CYCLES: 0.0

XADD_LOCK (M8, R8h) - Throughput and Uops

With a non-indexed addressing mode

With 1 independent instruction

With unroll_count=500 and no inner loop

With loop_count=1000 and unroll_count=10

With loop_count=100 and unroll_count=100

With 4 independent instructions

With unroll_count=200 and no inner loop

With loop_count=1000 and unroll_count=2

With loop_count=100 and unroll_count=20

With an indexed addressing mode

With 1 independent instruction

With unroll_count=500 and no inner loop

With loop_count=1000 and unroll_count=10

With loop_count=100 and unroll_count=100

With 4 independent instructions

With unroll_count=200 and no inner loop

With loop_count=1000 and unroll_count=2

With loop_count=100 and unroll_count=20