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:
- Instructions retired: 1.0
- Core cycles: 3.0
- Reference cycles: 2.42
- UOPS_RETIRED.ALL: 1.0
- UOPS_MS: 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:
- Instructions retired: 1.2
- Core cycles: 3.0
- Reference cycles: 2.37
- UOPS_RETIRED.ALL: 1.2
- UOPS_MS: 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:
- Instructions retired: 1.02
- Core cycles: 3.0
- Reference cycles: 2.37
- UOPS_RETIRED.ALL: 1.02
- UOPS_MS: 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:
- Instructions retired: 4.0
- Core cycles: 4.0
- Reference cycles: 3.19
- UOPS_RETIRED.ALL: 4.0
- UOPS_MS: 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:
- Instructions retired: 5.0
- Core cycles: 4.01
- Reference cycles: 3.17
- UOPS_RETIRED.ALL: 5.0
- UOPS_MS: 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:
- Instructions retired: 4.1
- Core cycles: 4.0
- Reference cycles: 3.17
- UOPS_RETIRED.ALL: 4.1
- UOPS_MS: 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:
- Instructions retired: 8.0
- Core cycles: 8.0
- Reference cycles: 6.76
- UOPS_RETIRED.ALL: 8.0
- UOPS_MS: 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:
- Instructions retired: 10.0
- Core cycles: 8.02
- Reference cycles: 6.33
- UOPS_RETIRED.ALL: 10.0
- UOPS_MS: 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:
- Instructions retired: 8.2
- Core cycles: 8.0
- Reference cycles: 6.32
- UOPS_RETIRED.ALL: 8.2
- UOPS_MS: 0.0

With 13 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 c1    	tzcnt  ax,r9w
  3c:	66 f3 41 0f bc f9    	tzcnt  di,r9w
  42:	66 f3 41 0f bc f1    	tzcnt  si,r9w
  48:	66 f3 41 0f bc e9    	tzcnt  bp,r9w

Show nanoBench command
Results:
- Instructions retired: 13.0
- Core cycles: 13.0
- Reference cycles: 10.53
- UOPS_RETIRED.ALL: 13.0
- UOPS_MS: 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 c1    	tzcnt  ax,r9w
  3c:	66 f3 41 0f bc f9    	tzcnt  di,r9w
  42:	66 f3 41 0f bc f1    	tzcnt  si,r9w
  48:	66 f3 41 0f bc e9    	tzcnt  bp,r9w

Show nanoBench command
Results:
- Instructions retired: 15.0
- Core cycles: 13.02
- Reference cycles: 10.28
- UOPS_RETIRED.ALL: 15.0
- UOPS_MS: 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 c1    	tzcnt  ax,r9w
  3c:	66 f3 41 0f bc f9    	tzcnt  di,r9w
  42:	66 f3 41 0f bc f1    	tzcnt  si,r9w
  48:	66 f3 41 0f bc e9    	tzcnt  bp,r9w

Show nanoBench command
Results:
- Instructions retired: 13.2
- Core cycles: 13.0
- Reference cycles: 10.28
- UOPS_RETIRED.ALL: 13.2
- UOPS_MS: 0.0

With the same register for for different operands

With 1 independent instruction

With unroll_count=500 and no inner loop

Code:

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

Show nanoBench command
Results:
- Instructions retired: 1.0
- Core cycles: 3.0
- Reference cycles: 2.42
- UOPS_RETIRED.ALL: 1.0
- UOPS_MS: 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:
- Instructions retired: 1.2
- Core cycles: 3.0
- Reference cycles: 2.37
- UOPS_RETIRED.ALL: 1.2
- UOPS_MS: 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:
- Instructions retired: 1.02
- Core cycles: 3.0
- Reference cycles: 2.37
- UOPS_RETIRED.ALL: 1.02
- UOPS_MS: 0.0

With 4 independent instructions

With unroll_count=200 and no inner loop

Code:

   0:	66 f3 45 0f bc c0    	tzcnt  r8w,r8w
   6:	66 f3 45 0f bc c9    	tzcnt  r9w,r9w
   c:	66 f3 45 0f bc d2    	tzcnt  r10w,r10w
  12:	66 f3 45 0f bc db    	tzcnt  r11w,r11w

Show nanoBench command
Results:
- Instructions retired: 4.0
- Core cycles: 4.0
- Reference cycles: 3.19
- UOPS_RETIRED.ALL: 4.0
- UOPS_MS: 0.0

With loop_count=1000 and unroll_count=2

Code:

   0:	66 f3 45 0f bc c0    	tzcnt  r8w,r8w
   6:	66 f3 45 0f bc c9    	tzcnt  r9w,r9w
   c:	66 f3 45 0f bc d2    	tzcnt  r10w,r10w
  12:	66 f3 45 0f bc db    	tzcnt  r11w,r11w

Show nanoBench command
Results:
- Instructions retired: 5.0
- Core cycles: 4.01
- Reference cycles: 3.18
- UOPS_RETIRED.ALL: 5.0
- UOPS_MS: 0.0

With loop_count=100 and unroll_count=20

Code:

   0:	66 f3 45 0f bc c0    	tzcnt  r8w,r8w
   6:	66 f3 45 0f bc c9    	tzcnt  r9w,r9w
   c:	66 f3 45 0f bc d2    	tzcnt  r10w,r10w
  12:	66 f3 45 0f bc db    	tzcnt  r11w,r11w

Show nanoBench command
Results:
- Instructions retired: 4.1
- Core cycles: 4.0
- Reference cycles: 3.17
- UOPS_RETIRED.ALL: 4.1
- UOPS_MS: 0.0

With 8 independent instructions

With unroll_count=100 and no inner loop

Code:

   0:	66 f3 45 0f bc c0    	tzcnt  r8w,r8w
   6:	66 f3 45 0f bc c9    	tzcnt  r9w,r9w
   c:	66 f3 45 0f bc d2    	tzcnt  r10w,r10w
  12:	66 f3 45 0f bc db    	tzcnt  r11w,r11w
  18:	66 f3 45 0f bc e4    	tzcnt  r12w,r12w
  1e:	66 f3 45 0f bc ed    	tzcnt  r13w,r13w
  24:	66 f3 45 0f bc f6    	tzcnt  r14w,r14w
  2a:	66 f3 0f bc db       	tzcnt  bx,bx

Show nanoBench command
Results:
- Instructions retired: 8.0
- Core cycles: 7.98
- Reference cycles: 6.5
- UOPS_RETIRED.ALL: 8.0
- UOPS_MS: 0.0

With loop_count=1000 and unroll_count=1

Code:

   0:	66 f3 45 0f bc c0    	tzcnt  r8w,r8w
   6:	66 f3 45 0f bc c9    	tzcnt  r9w,r9w
   c:	66 f3 45 0f bc d2    	tzcnt  r10w,r10w
  12:	66 f3 45 0f bc db    	tzcnt  r11w,r11w
  18:	66 f3 45 0f bc e4    	tzcnt  r12w,r12w
  1e:	66 f3 45 0f bc ed    	tzcnt  r13w,r13w
  24:	66 f3 45 0f bc f6    	tzcnt  r14w,r14w
  2a:	66 f3 0f bc db       	tzcnt  bx,bx

Show nanoBench command
Results:
- Instructions retired: 10.0
- Core cycles: 8.02
- Reference cycles: 6.36
- UOPS_RETIRED.ALL: 10.0
- UOPS_MS: 0.0

With loop_count=100 and unroll_count=10

Code:

   0:	66 f3 45 0f bc c0    	tzcnt  r8w,r8w
   6:	66 f3 45 0f bc c9    	tzcnt  r9w,r9w
   c:	66 f3 45 0f bc d2    	tzcnt  r10w,r10w
  12:	66 f3 45 0f bc db    	tzcnt  r11w,r11w
  18:	66 f3 45 0f bc e4    	tzcnt  r12w,r12w
  1e:	66 f3 45 0f bc ed    	tzcnt  r13w,r13w
  24:	66 f3 45 0f bc f6    	tzcnt  r14w,r14w
  2a:	66 f3 0f bc db       	tzcnt  bx,bx

Show nanoBench command
Results:
- Instructions retired: 8.2
- Core cycles: 8.0
- Reference cycles: 6.32
- UOPS_RETIRED.ALL: 8.2
- UOPS_MS: 0.0

With 14 independent instructions

With unroll_count=100 and no inner loop

Code:

   0:	66 f3 45 0f bc c0    	tzcnt  r8w,r8w
   6:	66 f3 45 0f bc c9    	tzcnt  r9w,r9w
   c:	66 f3 45 0f bc d2    	tzcnt  r10w,r10w
  12:	66 f3 45 0f bc db    	tzcnt  r11w,r11w
  18:	66 f3 45 0f bc e4    	tzcnt  r12w,r12w
  1e:	66 f3 45 0f bc ed    	tzcnt  r13w,r13w
  24:	66 f3 45 0f bc f6    	tzcnt  r14w,r14w
  2a:	66 f3 0f bc db       	tzcnt  bx,bx
  2f:	66 f3 0f bc c9       	tzcnt  cx,cx
  34:	66 f3 0f bc d2       	tzcnt  dx,dx
  39:	66 f3 0f bc c0       	tzcnt  ax,ax
  3e:	66 f3 0f bc ff       	tzcnt  di,di
  43:	66 f3 0f bc f6       	tzcnt  si,si
  48:	66 f3 0f bc ed       	tzcnt  bp,bp

Show nanoBench command
Results:
- Instructions retired: 14.0
- Core cycles: 13.98
- Reference cycles: 10.92
- UOPS_RETIRED.ALL: 14.0
- UOPS_MS: 0.0

With loop_count=1000 and unroll_count=1

Code:

   0:	66 f3 45 0f bc c0    	tzcnt  r8w,r8w
   6:	66 f3 45 0f bc c9    	tzcnt  r9w,r9w
   c:	66 f3 45 0f bc d2    	tzcnt  r10w,r10w
  12:	66 f3 45 0f bc db    	tzcnt  r11w,r11w
  18:	66 f3 45 0f bc e4    	tzcnt  r12w,r12w
  1e:	66 f3 45 0f bc ed    	tzcnt  r13w,r13w
  24:	66 f3 45 0f bc f6    	tzcnt  r14w,r14w
  2a:	66 f3 0f bc db       	tzcnt  bx,bx
  2f:	66 f3 0f bc c9       	tzcnt  cx,cx
  34:	66 f3 0f bc d2       	tzcnt  dx,dx
  39:	66 f3 0f bc c0       	tzcnt  ax,ax
  3e:	66 f3 0f bc ff       	tzcnt  di,di
  43:	66 f3 0f bc f6       	tzcnt  si,si
  48:	66 f3 0f bc ed       	tzcnt  bp,bp

Show nanoBench command
Results:
- Instructions retired: 16.0
- Core cycles: 14.02
- Reference cycles: 11.09
- UOPS_RETIRED.ALL: 16.0
- UOPS_MS: 0.0

With loop_count=100 and unroll_count=10

Code:

   0:	66 f3 45 0f bc c0    	tzcnt  r8w,r8w
   6:	66 f3 45 0f bc c9    	tzcnt  r9w,r9w
   c:	66 f3 45 0f bc d2    	tzcnt  r10w,r10w
  12:	66 f3 45 0f bc db    	tzcnt  r11w,r11w
  18:	66 f3 45 0f bc e4    	tzcnt  r12w,r12w
  1e:	66 f3 45 0f bc ed    	tzcnt  r13w,r13w
  24:	66 f3 45 0f bc f6    	tzcnt  r14w,r14w
  2a:	66 f3 0f bc db       	tzcnt  bx,bx
  2f:	66 f3 0f bc c9       	tzcnt  cx,cx
  34:	66 f3 0f bc d2       	tzcnt  dx,dx
  39:	66 f3 0f bc c0       	tzcnt  ax,ax
  3e:	66 f3 0f bc ff       	tzcnt  di,di
  43:	66 f3 0f bc f6       	tzcnt  si,si
  48:	66 f3 0f bc ed       	tzcnt  bp,bp

Show nanoBench command
Results:
- Instructions retired: 14.2
- Core cycles: 14.0
- Reference cycles: 11.06
- UOPS_RETIRED.ALL: 14.2
- UOPS_MS: 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 13 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 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 14 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