IDIV (R16)

Experiment 1 (fast division)

Instruction: IDIV BX
Chain instructions: AND BX, AX; AND BX, CX; OR BX, CX; OR BX, BX; OR BX, BX; OR BX, BX; OR BX, BX; OR BX, BX; OR BX, BX; OR BX, BX; OR BX, BX; ; MOV AX, R8W;MOV DX, R9W
Chain latency: 11

Code:

   0:	66 f7 fb             	idiv   bx
   3:	66 21 c3             	and    bx,ax
   6:	66 21 cb             	and    bx,cx
   9:	66 09 cb             	or     bx,cx
   c:	66 09 db             	or     bx,bx
   f:	66 09 db             	or     bx,bx
  12:	66 09 db             	or     bx,bx
  15:	66 09 db             	or     bx,bx
  18:	66 09 db             	or     bx,bx
  1b:	66 09 db             	or     bx,bx
  1e:	66 09 db             	or     bx,bx
  21:	66 09 db             	or     bx,bx
  24:	66 44 89 c0          	mov    ax,r8w
  28:	66 44 89 ca          	mov    dx,r9w

Init:

MOV R8, 0;
MOV R9, 0;
MOV RCX, 1;
MOV BX, CX;
MOV RAX, R8;
MOV RDX, R9

Show nanoBench command
Results:
- Instructions retired: 14.0
- Core cycles: 34.4
- Reference cycles: 29.5
- UOPS_EXECUTED.THREAD: 23.0

Experiment 2 (slow division)

Instruction: IDIV BX
Chain instructions: AND BX, AX; AND BX, CX; OR BX, CX; OR BX, BX; OR BX, BX; OR BX, BX; OR BX, BX; OR BX, BX; OR BX, BX; OR BX, BX; OR BX, BX; ; MOV AX, R8W;MOV DX, R9W
Chain latency: 11

Code:

   0:	66 f7 fb             	idiv   bx
   3:	66 21 c3             	and    bx,ax
   6:	66 21 cb             	and    bx,cx
   9:	66 09 cb             	or     bx,cx
   c:	66 09 db             	or     bx,bx
   f:	66 09 db             	or     bx,bx
  12:	66 09 db             	or     bx,bx
  15:	66 09 db             	or     bx,bx
  18:	66 09 db             	or     bx,bx
  1b:	66 09 db             	or     bx,bx
  1e:	66 09 db             	or     bx,bx
  21:	66 09 db             	or     bx,bx
  24:	66 44 89 c0          	mov    ax,r8w
  28:	66 44 89 ca          	mov    dx,r9w

Init:

MOV R8, 133;
MOV R9, 0x343a;
MOV RCX, 0x75e6;
MOV BX, CX;
MOV RAX, R8;
MOV RDX, R9

Show nanoBench command
Results:
- Instructions retired: 14.0
- Core cycles: 34.45
- Reference cycles: 29.25
- UOPS_EXECUTED.THREAD: 23.0

Latency operand 1 → 3: 24

Experiment 1 (fast division)

Instruction: IDIV BX
Chain instructions: AND BX, DX; AND BX, CX; OR BX, CX; OR BX, BX; OR BX, BX; OR BX, BX; OR BX, BX; OR BX, BX; OR BX, BX; OR BX, BX; OR BX, BX; ; MOV AX, R8W;MOV DX, R9W
Chain latency: 11

Code:

   0:	66 f7 fb             	idiv   bx
   3:	66 21 d3             	and    bx,dx
   6:	66 21 cb             	and    bx,cx
   9:	66 09 cb             	or     bx,cx
   c:	66 09 db             	or     bx,bx
   f:	66 09 db             	or     bx,bx
  12:	66 09 db             	or     bx,bx
  15:	66 09 db             	or     bx,bx
  18:	66 09 db             	or     bx,bx
  1b:	66 09 db             	or     bx,bx
  1e:	66 09 db             	or     bx,bx
  21:	66 09 db             	or     bx,bx
  24:	66 44 89 c0          	mov    ax,r8w
  28:	66 44 89 ca          	mov    dx,r9w

Init:

MOV R8, 0;
MOV R9, 0;
MOV RCX, 1;
MOV BX, CX;
MOV RAX, R8;
MOV RDX, R9

Show nanoBench command
Results:
- Instructions retired: 14.0
- Core cycles: 35.21
- Reference cycles: 30.25
- UOPS_EXECUTED.THREAD: 23.0

Experiment 2 (slow division)

Instruction: IDIV BX
Chain instructions: AND BX, DX; AND BX, CX; OR BX, CX; OR BX, BX; OR BX, BX; OR BX, BX; OR BX, BX; OR BX, BX; OR BX, BX; OR BX, BX; OR BX, BX; ; MOV AX, R8W;MOV DX, R9W
Chain latency: 11

Code:

   0:	66 f7 fb             	idiv   bx
   3:	66 21 d3             	and    bx,dx
   6:	66 21 cb             	and    bx,cx
   9:	66 09 cb             	or     bx,cx
   c:	66 09 db             	or     bx,bx
   f:	66 09 db             	or     bx,bx
  12:	66 09 db             	or     bx,bx
  15:	66 09 db             	or     bx,bx
  18:	66 09 db             	or     bx,bx
  1b:	66 09 db             	or     bx,bx
  1e:	66 09 db             	or     bx,bx
  21:	66 09 db             	or     bx,bx
  24:	66 44 89 c0          	mov    ax,r8w
  28:	66 44 89 ca          	mov    dx,r9w

Init:

MOV R8, 133;
MOV R9, 0x343a;
MOV RCX, 0x75e6;
MOV BX, CX;
MOV RAX, R8;
MOV RDX, R9

Show nanoBench command
Results:
- Instructions retired: 14.0
- Core cycles: 35.22
- Reference cycles: 30.75
- UOPS_EXECUTED.THREAD: 23.0

Latency operand 2 → 2: 21

Experiment 1 (fast division)

Instruction: IDIV BX
Chain instructions: AND AX, R8W; OR AX, R8W; OR AX, AX; OR AX, AX; OR AX, AX; OR AX, AX; OR AX, AX; OR AX, AX; OR AX, AX; OR AX, AX; ; MOV DX, R9W
Chain latency: 10

Code:

   0:	66 f7 fb             	idiv   bx
   3:	66 44 21 c0          	and    ax,r8w
   7:	66 44 09 c0          	or     ax,r8w
   b:	66 09 c0             	or     ax,ax
   e:	66 09 c0             	or     ax,ax
  11:	66 09 c0             	or     ax,ax
  14:	66 09 c0             	or     ax,ax
  17:	66 09 c0             	or     ax,ax
  1a:	66 09 c0             	or     ax,ax
  1d:	66 09 c0             	or     ax,ax
  20:	66 09 c0             	or     ax,ax
  23:	66 44 89 ca          	mov    dx,r9w

Init:

MOV R8, 0;
MOV R9, 0;
MOV RCX, 1;
MOV BX, CX;
MOV RAX, R8;
MOV RDX, R9

Show nanoBench command
Results:
- Instructions retired: 12.0
- Core cycles: 31.34
- Reference cycles: 26.75
- UOPS_EXECUTED.THREAD: 21.0

Experiment 2 (slow division)

Instruction: IDIV BX
Chain instructions: AND AX, R8W; OR AX, R8W; OR AX, AX; OR AX, AX; OR AX, AX; OR AX, AX; OR AX, AX; OR AX, AX; OR AX, AX; OR AX, AX; ; MOV DX, R9W
Chain latency: 10

Code:

   0:	66 f7 fb             	idiv   bx
   3:	66 44 21 c0          	and    ax,r8w
   7:	66 44 09 c0          	or     ax,r8w
   b:	66 09 c0             	or     ax,ax
   e:	66 09 c0             	or     ax,ax
  11:	66 09 c0             	or     ax,ax
  14:	66 09 c0             	or     ax,ax
  17:	66 09 c0             	or     ax,ax
  1a:	66 09 c0             	or     ax,ax
  1d:	66 09 c0             	or     ax,ax
  20:	66 09 c0             	or     ax,ax
  23:	66 44 89 ca          	mov    dx,r9w

Init:

MOV R8, 133;
MOV R9, 0x343a;
MOV RCX, 0x75e6;
MOV BX, CX;
MOV RAX, R8;
MOV RDX, R9

Show nanoBench command
Results:
- Instructions retired: 12.0
- Core cycles: 31.42
- Reference cycles: 26.75
- UOPS_EXECUTED.THREAD: 21.0

Latency operand 2 → 3: 22

Experiment 1 (fast division)

Instruction: IDIV BX
Chain instructions: AND AX, DX; AND AX, R8W; OR AX, R8W; OR AX, AX; OR AX, AX; OR AX, AX; OR AX, AX; OR AX, AX; OR AX, AX; OR AX, AX; OR AX, AX; ; MOV DX, R9W
Chain latency: 11

Code:

   0:	66 f7 fb             	idiv   bx
   3:	66 21 d0             	and    ax,dx
   6:	66 44 21 c0          	and    ax,r8w
   a:	66 44 09 c0          	or     ax,r8w
   e:	66 09 c0             	or     ax,ax
  11:	66 09 c0             	or     ax,ax
  14:	66 09 c0             	or     ax,ax
  17:	66 09 c0             	or     ax,ax
  1a:	66 09 c0             	or     ax,ax
  1d:	66 09 c0             	or     ax,ax
  20:	66 09 c0             	or     ax,ax
  23:	66 09 c0             	or     ax,ax
  26:	66 44 89 ca          	mov    dx,r9w

Init:

MOV R8, 0;
MOV R9, 0;
MOV RCX, 1;
MOV BX, CX;
MOV RAX, R8;
MOV RDX, R9

Show nanoBench command
Results:
- Instructions retired: 13.0
- Core cycles: 33.01
- Reference cycles: 28.25
- UOPS_EXECUTED.THREAD: 22.0

Experiment 2 (slow division)

Instruction: IDIV BX
Chain instructions: AND AX, DX; AND AX, R8W; OR AX, R8W; OR AX, AX; OR AX, AX; OR AX, AX; OR AX, AX; OR AX, AX; OR AX, AX; OR AX, AX; OR AX, AX; ; MOV DX, R9W
Chain latency: 11

Code:

   0:	66 f7 fb             	idiv   bx
   3:	66 21 d0             	and    ax,dx
   6:	66 44 21 c0          	and    ax,r8w
   a:	66 44 09 c0          	or     ax,r8w
   e:	66 09 c0             	or     ax,ax
  11:	66 09 c0             	or     ax,ax
  14:	66 09 c0             	or     ax,ax
  17:	66 09 c0             	or     ax,ax
  1a:	66 09 c0             	or     ax,ax
  1d:	66 09 c0             	or     ax,ax
  20:	66 09 c0             	or     ax,ax
  23:	66 09 c0             	or     ax,ax
  26:	66 44 89 ca          	mov    dx,r9w

Init:

MOV R8, 133;
MOV R9, 0x343a;
MOV RCX, 0x75e6;
MOV BX, CX;
MOV RAX, R8;
MOV RDX, R9

Show nanoBench command
Results:
- Instructions retired: 13.0
- Core cycles: 33.01
- Reference cycles: 28.5
- UOPS_EXECUTED.THREAD: 22.0

Latency operand 3 → 2: 22

Experiment 1 (fast division)

Instruction: IDIV BX
Chain instructions: AND DX, AX; AND DX, R9W; OR DX, R9W; OR DX, DX; OR DX, DX; OR DX, DX; OR DX, DX; OR DX, DX; OR DX, DX; OR DX, DX; OR DX, DX; ; MOV AX, R8W
Chain latency: 11

Code:

   0:	66 f7 fb             	idiv   bx
   3:	66 21 c2             	and    dx,ax
   6:	66 44 21 ca          	and    dx,r9w
   a:	66 44 09 ca          	or     dx,r9w
   e:	66 09 d2             	or     dx,dx
  11:	66 09 d2             	or     dx,dx
  14:	66 09 d2             	or     dx,dx
  17:	66 09 d2             	or     dx,dx
  1a:	66 09 d2             	or     dx,dx
  1d:	66 09 d2             	or     dx,dx
  20:	66 09 d2             	or     dx,dx
  23:	66 09 d2             	or     dx,dx
  26:	66 44 89 c0          	mov    ax,r8w

Init:

MOV R8, 0;
MOV R9, 0;
MOV RCX, 1;
MOV BX, CX;
MOV RAX, R8;
MOV RDX, R9

Show nanoBench command
Results:
- Instructions retired: 13.0
- Core cycles: 33.13
- Reference cycles: 29.0
- UOPS_EXECUTED.THREAD: 22.0

Experiment 2 (slow division)

Instruction: IDIV BX
Chain instructions: AND DX, AX; AND DX, R9W; OR DX, R9W; OR DX, DX; OR DX, DX; OR DX, DX; OR DX, DX; OR DX, DX; OR DX, DX; OR DX, DX; OR DX, DX; ; MOV AX, R8W
Chain latency: 11

Code:

   0:	66 f7 fb             	idiv   bx
   3:	66 21 c2             	and    dx,ax
   6:	66 44 21 ca          	and    dx,r9w
   a:	66 44 09 ca          	or     dx,r9w
   e:	66 09 d2             	or     dx,dx
  11:	66 09 d2             	or     dx,dx
  14:	66 09 d2             	or     dx,dx
  17:	66 09 d2             	or     dx,dx
  1a:	66 09 d2             	or     dx,dx
  1d:	66 09 d2             	or     dx,dx
  20:	66 09 d2             	or     dx,dx
  23:	66 09 d2             	or     dx,dx
  26:	66 44 89 c0          	mov    ax,r8w

Init:

MOV R8, 133;
MOV R9, 0x343a;
MOV RCX, 0x75e6;
MOV BX, CX;
MOV RAX, R8;
MOV RDX, R9

Show nanoBench command
Results:
- Instructions retired: 13.0
- Core cycles: 33.1
- Reference cycles: 28.5
- UOPS_EXECUTED.THREAD: 22.0

Latency operand 3 → 3: 22

Experiment 1 (fast division)

Instruction: IDIV BX
Chain instructions: AND DX, R9W; OR DX, R9W; OR DX, DX; OR DX, DX; OR DX, DX; OR DX, DX; OR DX, DX; OR DX, DX; OR DX, DX; OR DX, DX; ; MOV AX, R8W
Chain latency: 10

Code:

   0:	66 f7 fb             	idiv   bx
   3:	66 44 21 ca          	and    dx,r9w
   7:	66 44 09 ca          	or     dx,r9w
   b:	66 09 d2             	or     dx,dx
   e:	66 09 d2             	or     dx,dx
  11:	66 09 d2             	or     dx,dx
  14:	66 09 d2             	or     dx,dx
  17:	66 09 d2             	or     dx,dx
  1a:	66 09 d2             	or     dx,dx
  1d:	66 09 d2             	or     dx,dx
  20:	66 09 d2             	or     dx,dx
  23:	66 44 89 c0          	mov    ax,r8w

Init:

MOV R8, 0;
MOV R9, 0;
MOV RCX, 1;
MOV BX, CX;
MOV RAX, R8;
MOV RDX, R9

Show nanoBench command
Results:
- Instructions retired: 12.0
- Core cycles: 32.19
- Reference cycles: 28.0
- UOPS_EXECUTED.THREAD: 21.0

Experiment 2 (slow division)

Instruction: IDIV BX
Chain instructions: AND DX, R9W; OR DX, R9W; OR DX, DX; OR DX, DX; OR DX, DX; OR DX, DX; OR DX, DX; OR DX, DX; OR DX, DX; OR DX, DX; ; MOV AX, R8W
Chain latency: 10

Code:

   0:	66 f7 fb             	idiv   bx
   3:	66 44 21 ca          	and    dx,r9w
   7:	66 44 09 ca          	or     dx,r9w
   b:	66 09 d2             	or     dx,dx
   e:	66 09 d2             	or     dx,dx
  11:	66 09 d2             	or     dx,dx
  14:	66 09 d2             	or     dx,dx
  17:	66 09 d2             	or     dx,dx
  1a:	66 09 d2             	or     dx,dx
  1d:	66 09 d2             	or     dx,dx
  20:	66 09 d2             	or     dx,dx
  23:	66 44 89 c0          	mov    ax,r8w

Init:

MOV R8, 133;
MOV R9, 0x343a;
MOV RCX, 0x75e6;
MOV BX, CX;
MOV RAX, R8;
MOV RDX, R9

Show nanoBench command
Results:
- Instructions retired: 12.0
- Core cycles: 32.21
- Reference cycles: 28.25
- UOPS_EXECUTED.THREAD: 21.0

IDIV (R16) - Latency

Operands

Latency operand 1 → 2: 23

Latency operand 1 → 3: 24

Latency operand 2 → 2: 21

Latency operand 2 → 3: 22

Latency operand 3 → 2: 22

Latency operand 3 → 3: 22

Latency operand 1 → 2: 23

Experiment 1 (fast division)

Experiment 2 (slow division)

Latency operand 1 → 3: 24

Experiment 1 (fast division)

Experiment 2 (slow division)

Latency operand 2 → 2: 21

Experiment 1 (fast division)

Experiment 2 (slow division)

Latency operand 2 → 3: 22

Experiment 1 (fast division)

Experiment 2 (slow division)

Latency operand 3 → 2: 22

Experiment 1 (fast division)

Experiment 2 (slow division)

Latency operand 3 → 3: 22

Experiment 1 (fast division)

Experiment 2 (slow division)