KANDB (K, K, K)

Experiment 1

Instruction: KANDB K2, K1, K0
Chain instruction: KANDB K1, K2, K0

Code:

   0:	c5 f5 41 d0          	kandb  k2,k1,k0
   4:	c5 ed 41 c8          	kandb  k1,k2,k0

Init:

MOV R15, 10000;
L: VADDPS YMM0, YMM1, YMM1;
VADDPS YMM0, YMM1, YMM1;
DEC R15;
JNZ L;
VZEROALL

Show nanoBench command
Results:
- Instructions retired: 2.0
- Core cycles: 2.01
- Reference cycles: 0.62
- UOPS_EXECUTED.THREAD: 2.0

Experiment 2

Instruction: KANDB K2, K1, K0
Chain instructions: KMOVQ K1, K2;KMOVQ K1, K1;KMOVQ K1, K1;KMOVQ K1, K1;KMOVQ K1, K1
Chain latency: 5

Code:

   0:	c5 f5 41 d0          	kandb  k2,k1,k0
   4:	c4 e1 f8 90 ca       	kmovq  k1,k2
   9:	c4 e1 f8 90 c9       	kmovq  k1,k1
   e:	c4 e1 f8 90 c9       	kmovq  k1,k1
  13:	c4 e1 f8 90 c9       	kmovq  k1,k1
  18:	c4 e1 f8 90 c9       	kmovq  k1,k1

Init:

MOV R15, 10000;
L: VADDPS YMM0, YMM1, YMM1;
VADDPS YMM0, YMM1, YMM1;
DEC R15;
JNZ L;
VZEROALL

Show nanoBench command
Results:
- Instructions retired: 6.0
- Core cycles: 5.99
- Reference cycles: 2.17
- UOPS_EXECUTED.THREAD: 6.0

Experiment 1

Instruction: KANDB K2, K0, K1
Chain instruction: KANDB K1, K0, K2

Code:

   0:	c5 fd 41 d1          	kandb  k2,k0,k1
   4:	c5 fd 41 ca          	kandb  k1,k0,k2

Init:

MOV R15, 10000;
L: VADDPS YMM0, YMM1, YMM1;
VADDPS YMM0, YMM1, YMM1;
DEC R15;
JNZ L;
VZEROALL

Show nanoBench command
Results:
- Instructions retired: 2.0
- Core cycles: 2.01
- Reference cycles: 0.62
- UOPS_EXECUTED.THREAD: 2.0

Experiment 2

Instruction: KANDB K2, K0, K1
Chain instructions: KMOVQ K1, K2;KMOVQ K1, K1;KMOVQ K1, K1;KMOVQ K1, K1;KMOVQ K1, K1
Chain latency: 5

Code:

   0:	c5 fd 41 d1          	kandb  k2,k0,k1
   4:	c4 e1 f8 90 ca       	kmovq  k1,k2
   9:	c4 e1 f8 90 c9       	kmovq  k1,k1
   e:	c4 e1 f8 90 c9       	kmovq  k1,k1
  13:	c4 e1 f8 90 c9       	kmovq  k1,k1
  18:	c4 e1 f8 90 c9       	kmovq  k1,k1

Init:

MOV R15, 10000;
L: VADDPS YMM0, YMM1, YMM1;
VADDPS YMM0, YMM1, YMM1;
DEC R15;
JNZ L;
VZEROALL

Show nanoBench command
Results:
- Instructions retired: 6.0
- Core cycles: 5.99
- Reference cycles: 2.02
- UOPS_EXECUTED.THREAD: 6.0

KANDB (K, K, K) - Latency

Operands

Latency operand 2 → 1: 1

Latency operand 3 → 1: 1

Latency operand 2 → 1: 1

Experiment 1

Experiment 2

Latency operand 3 → 1: 1

Experiment 1

Experiment 2