TZCNT (R16, R16)

With unroll_count=500 and no inner loop

Code:

   0:	66 f3 45 0f bc c1    	tzcnt  r8w,r9w

Show nanoBench command
Results:
- MPERF: 0.83
- APERF: 1.0
- UOPS: 2.0
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- FpuPipeAssignment.Total4: 0.0
- FpuPipeAssignment.Total5: 0.0
- DIV_CYCLES: 0.0

With loop_count=1000 and unroll_count=10

Code:

   0:	66 f3 45 0f bc c1    	tzcnt  r8w,r9w

Show nanoBench command
Results:
- MPERF: 0.81
- APERF: 1.0
- UOPS: 2.1
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- FpuPipeAssignment.Total4: 0.0
- FpuPipeAssignment.Total5: 0.0
- DIV_CYCLES: 0.0

With loop_count=100 and unroll_count=100

Code:

   0:	66 f3 45 0f bc c1    	tzcnt  r8w,r9w

Show nanoBench command
Results:
- MPERF: 0.81
- APERF: 1.0
- UOPS: 2.01
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- FpuPipeAssignment.Total4: 0.0
- FpuPipeAssignment.Total5: 0.0
- DIV_CYCLES: 0.0

With 4 independent instructions

With unroll_count=200 and no inner loop

Code:

   0:	66 f3 45 0f bc c1    	tzcnt  r8w,r9w
   6:	66 f3 45 0f bc d1    	tzcnt  r10w,r9w
   c:	66 f3 45 0f bc d9    	tzcnt  r11w,r9w
  12:	66 f3 45 0f bc e1    	tzcnt  r12w,r9w

Show nanoBench command
Results:
- MPERF: 1.6
- APERF: 2.0
- UOPS: 8.0
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- FpuPipeAssignment.Total4: 0.0
- FpuPipeAssignment.Total5: 0.0
- DIV_CYCLES: 0.0

With loop_count=1000 and unroll_count=2

Code:

   0:	66 f3 45 0f bc c1    	tzcnt  r8w,r9w
   6:	66 f3 45 0f bc d1    	tzcnt  r10w,r9w
   c:	66 f3 45 0f bc d9    	tzcnt  r11w,r9w
  12:	66 f3 45 0f bc e1    	tzcnt  r12w,r9w

Show nanoBench command
Results:
- MPERF: 1.75
- APERF: 2.13
- UOPS: 8.5
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- FpuPipeAssignment.Total4: 0.0
- FpuPipeAssignment.Total5: 0.0
- DIV_CYCLES: 0.0

With loop_count=100 and unroll_count=20

Code:

   0:	66 f3 45 0f bc c1    	tzcnt  r8w,r9w
   6:	66 f3 45 0f bc d1    	tzcnt  r10w,r9w
   c:	66 f3 45 0f bc d9    	tzcnt  r11w,r9w
  12:	66 f3 45 0f bc e1    	tzcnt  r12w,r9w

Show nanoBench command
Results:
- MPERF: 1.64
- APERF: 2.02
- UOPS: 8.05
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- FpuPipeAssignment.Total4: 0.0
- FpuPipeAssignment.Total5: 0.0
- DIV_CYCLES: 0.0

With 8 independent instructions

With unroll_count=100 and no inner loop

Code:

   0:	66 f3 45 0f bc c1    	tzcnt  r8w,r9w
   6:	66 f3 45 0f bc d1    	tzcnt  r10w,r9w
   c:	66 f3 45 0f bc d9    	tzcnt  r11w,r9w
  12:	66 f3 45 0f bc e1    	tzcnt  r12w,r9w
  18:	66 f3 45 0f bc e9    	tzcnt  r13w,r9w
  1e:	66 f3 45 0f bc f1    	tzcnt  r14w,r9w
  24:	66 f3 41 0f bc d9    	tzcnt  bx,r9w
  2a:	66 f3 41 0f bc c9    	tzcnt  cx,r9w

Show nanoBench command
Results:
- MPERF: 3.27
- APERF: 4.0
- UOPS: 16.0
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- FpuPipeAssignment.Total4: 0.0
- FpuPipeAssignment.Total5: 0.0
- DIV_CYCLES: 0.0

With loop_count=1000 and unroll_count=1

Code:

   0:	66 f3 45 0f bc c1    	tzcnt  r8w,r9w
   6:	66 f3 45 0f bc d1    	tzcnt  r10w,r9w
   c:	66 f3 45 0f bc d9    	tzcnt  r11w,r9w
  12:	66 f3 45 0f bc e1    	tzcnt  r12w,r9w
  18:	66 f3 45 0f bc e9    	tzcnt  r13w,r9w
  1e:	66 f3 45 0f bc f1    	tzcnt  r14w,r9w
  24:	66 f3 41 0f bc d9    	tzcnt  bx,r9w
  2a:	66 f3 41 0f bc c9    	tzcnt  cx,r9w

Show nanoBench command
Results:
- MPERF: 3.48
- APERF: 4.26
- UOPS: 17.0
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- FpuPipeAssignment.Total4: 0.0
- FpuPipeAssignment.Total5: 0.0
- DIV_CYCLES: 0.0

With loop_count=100 and unroll_count=10

Code:

   0:	66 f3 45 0f bc c1    	tzcnt  r8w,r9w
   6:	66 f3 45 0f bc d1    	tzcnt  r10w,r9w
   c:	66 f3 45 0f bc d9    	tzcnt  r11w,r9w
  12:	66 f3 45 0f bc e1    	tzcnt  r12w,r9w
  18:	66 f3 45 0f bc e9    	tzcnt  r13w,r9w
  1e:	66 f3 45 0f bc f1    	tzcnt  r14w,r9w
  24:	66 f3 41 0f bc d9    	tzcnt  bx,r9w
  2a:	66 f3 41 0f bc c9    	tzcnt  cx,r9w

Show nanoBench command
Results:
- MPERF: 3.29
- APERF: 4.04
- UOPS: 16.1
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- FpuPipeAssignment.Total4: 0.0
- FpuPipeAssignment.Total5: 0.0
- DIV_CYCLES: 0.0

With 12 independent instructions

With unroll_count=100 and no inner loop

Code:

   0:	66 f3 45 0f bc c1    	tzcnt  r8w,r9w
   6:	66 f3 45 0f bc d1    	tzcnt  r10w,r9w
   c:	66 f3 45 0f bc d9    	tzcnt  r11w,r9w
  12:	66 f3 45 0f bc e1    	tzcnt  r12w,r9w
  18:	66 f3 45 0f bc e9    	tzcnt  r13w,r9w
  1e:	66 f3 45 0f bc f1    	tzcnt  r14w,r9w
  24:	66 f3 41 0f bc d9    	tzcnt  bx,r9w
  2a:	66 f3 41 0f bc c9    	tzcnt  cx,r9w
  30:	66 f3 41 0f bc d1    	tzcnt  dx,r9w
  36:	66 f3 41 0f bc f9    	tzcnt  di,r9w
  3c:	66 f3 41 0f bc f1    	tzcnt  si,r9w
  42:	66 f3 41 0f bc e9    	tzcnt  bp,r9w

Show nanoBench command
Results:
- MPERF: 5.0
- APERF: 6.0
- UOPS: 24.0
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- FpuPipeAssignment.Total4: 0.0
- FpuPipeAssignment.Total5: 0.0
- DIV_CYCLES: 0.0

With loop_count=1000 and unroll_count=1

Code:

   0:	66 f3 45 0f bc c1    	tzcnt  r8w,r9w
   6:	66 f3 45 0f bc d1    	tzcnt  r10w,r9w
   c:	66 f3 45 0f bc d9    	tzcnt  r11w,r9w
  12:	66 f3 45 0f bc e1    	tzcnt  r12w,r9w
  18:	66 f3 45 0f bc e9    	tzcnt  r13w,r9w
  1e:	66 f3 45 0f bc f1    	tzcnt  r14w,r9w
  24:	66 f3 41 0f bc d9    	tzcnt  bx,r9w
  2a:	66 f3 41 0f bc c9    	tzcnt  cx,r9w
  30:	66 f3 41 0f bc d1    	tzcnt  dx,r9w
  36:	66 f3 41 0f bc f9    	tzcnt  di,r9w
  3c:	66 f3 41 0f bc f1    	tzcnt  si,r9w
  42:	66 f3 41 0f bc e9    	tzcnt  bp,r9w

Show nanoBench command
Results:
- MPERF: 5.12
- APERF: 6.26
- UOPS: 25.0
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- FpuPipeAssignment.Total4: 0.0
- FpuPipeAssignment.Total5: 0.0
- DIV_CYCLES: 0.0

With loop_count=100 and unroll_count=10

Code:

   0:	66 f3 45 0f bc c1    	tzcnt  r8w,r9w
   6:	66 f3 45 0f bc d1    	tzcnt  r10w,r9w
   c:	66 f3 45 0f bc d9    	tzcnt  r11w,r9w
  12:	66 f3 45 0f bc e1    	tzcnt  r12w,r9w
  18:	66 f3 45 0f bc e9    	tzcnt  r13w,r9w
  1e:	66 f3 45 0f bc f1    	tzcnt  r14w,r9w
  24:	66 f3 41 0f bc d9    	tzcnt  bx,r9w
  2a:	66 f3 41 0f bc c9    	tzcnt  cx,r9w
  30:	66 f3 41 0f bc d1    	tzcnt  dx,r9w
  36:	66 f3 41 0f bc f9    	tzcnt  di,r9w
  3c:	66 f3 41 0f bc f1    	tzcnt  si,r9w
  42:	66 f3 41 0f bc e9    	tzcnt  bp,r9w

Show nanoBench command
Results:
- MPERF: 4.9
- APERF: 6.04
- UOPS: 24.1
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- FpuPipeAssignment.Total4: 0.0
- FpuPipeAssignment.Total5: 0.0
- DIV_CYCLES: 0.0

With the same register for for different operands

With unroll_count=500 and no inner loop

Code:

   0:	66 f3 45 0f bc c0    	tzcnt  r8w,r8w

Show nanoBench command
Results:
- MPERF: 1.63
- APERF: 2.0
- UOPS: 2.0
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- FpuPipeAssignment.Total4: 0.0
- FpuPipeAssignment.Total5: 0.0
- DIV_CYCLES: 0.0

With loop_count=1000 and unroll_count=10

Code:

   0:	66 f3 45 0f bc c0    	tzcnt  r8w,r8w

Show nanoBench command
Results:
- MPERF: 1.62
- APERF: 2.0
- UOPS: 2.1
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- FpuPipeAssignment.Total4: 0.0
- FpuPipeAssignment.Total5: 0.0
- DIV_CYCLES: 0.0

With loop_count=100 and unroll_count=100

Code:

   0:	66 f3 45 0f bc c0    	tzcnt  r8w,r8w

Show nanoBench command
Results:
- MPERF: 1.64
- APERF: 2.0
- UOPS: 2.01
- FpuPipeAssignment.Total0: 0.0
- FpuPipeAssignment.Total1: 0.0
- FpuPipeAssignment.Total2: 0.0
- FpuPipeAssignment.Total3: 0.0
- FpuPipeAssignment.Total4: 0.0
- FpuPipeAssignment.Total5: 0.0
- DIV_CYCLES: 0.0

TZCNT (R16, R16) - Throughput and Uops

With different registers for different operands

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 8 independent instructions

With unroll_count=100 and no inner loop

With loop_count=1000 and unroll_count=1

With loop_count=100 and unroll_count=10

With 12 independent instructions

With unroll_count=100 and no inner loop

With loop_count=1000 and unroll_count=1

With loop_count=100 and unroll_count=10

With the same register for for different operands

With unroll_count=500 and no inner loop

With loop_count=1000 and unroll_count=10

With loop_count=100 and unroll_count=100