KMOVD (M32, K)

Experiment 1

Instruction: KMOVD dword ptr [R14], K0
Chain instructions: MOV R12D, [R14];MOVSX R12, R12D;MOVSX R12, R12D;MOVSX R12, R12D;MOVSX R12, R12D;XOR R14, R12; XOR R14, R12
Chain latency: ≥7

Code:

   0:	c4 c1 f9 91 06       	kmovd  DWORD PTR [r14],k0
   5:	45 8b 26             	mov    r12d,DWORD PTR [r14]
   8:	4d 63 e4             	movsxd r12,r12d
   b:	4d 63 e4             	movsxd r12,r12d
   e:	4d 63 e4             	movsxd r12,r12d
  11:	4d 63 e4             	movsxd r12,r12d
  14:	4d 31 e6             	xor    r14,r12
  17:	4d 31 e6             	xor    r14,r12

Init:

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

Show nanoBench command
Results:
- Instructions retired: 8.0
- Core cycles: 17.3
- Reference cycles: 15.82
- UOPS_EXECUTED.THREAD: 9.0

Experiment 2 (with additional nop)

Instruction: KMOVD dword ptr [R14], K0
Chain instructions: MOV R12D, [R14];MOVSX R12, R12D;MOVSX R12, R12D;MOVSX R12, R12D;MOVSX R12, R12D;XOR R14, R12; XOR R14, R12;nop
Chain latency: ≥7

Code:

   0:	c4 c1 f9 91 06       	kmovd  DWORD PTR [r14],k0
   5:	45 8b 26             	mov    r12d,DWORD PTR [r14]
   8:	4d 63 e4             	movsxd r12,r12d
   b:	4d 63 e4             	movsxd r12,r12d
   e:	4d 63 e4             	movsxd r12,r12d
  11:	4d 63 e4             	movsxd r12,r12d
  14:	4d 31 e6             	xor    r14,r12
  17:	4d 31 e6             	xor    r14,r12
  1a:	90                   	nop

Init:

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

Show nanoBench command
Results:
- Instructions retired: 9.0
- Core cycles: 17.26
- Reference cycles: 15.57
- UOPS_EXECUTED.THREAD: 9.0

Experiment 1

Instruction: KMOVD dword ptr [R14+R13], K0
Chain instructions: MOV R12D, [R14+R13];MOVSX R12, R12D;MOVSX R12, R12D;MOVSX R12, R12D;MOVSX R12, R12D;XOR R13, R12; XOR R13, R12
Chain latency: ≥7

Code:

   0:	c4 81 f9 91 04 2e    	kmovd  DWORD PTR [r14+r13*1],k0
   6:	47 8b 24 2e          	mov    r12d,DWORD PTR [r14+r13*1]
   a:	4d 63 e4             	movsxd r12,r12d
   d:	4d 63 e4             	movsxd r12,r12d
  10:	4d 63 e4             	movsxd r12,r12d
  13:	4d 63 e4             	movsxd r12,r12d
  16:	4d 31 e5             	xor    r13,r12
  19:	4d 31 e5             	xor    r13,r12

Init:

MOV R15, 10000;
L: VADDPS YMM0, YMM1, YMM1;
VADDPS YMM0, YMM1, YMM1;
DEC R15;
JNZ L;
VZEROALL;
XOR R13, R13

Show nanoBench command
Results:
- Instructions retired: 8.0
- Core cycles: 17.45
- Reference cycles: 15.82
- UOPS_EXECUTED.THREAD: 9.0

Experiment 2 (with additional nop)

Instruction: KMOVD dword ptr [R14+R13], K0
Chain instructions: MOV R12D, [R14+R13];MOVSX R12, R12D;MOVSX R12, R12D;MOVSX R12, R12D;MOVSX R12, R12D;XOR R13, R12; XOR R13, R12;nop
Chain latency: ≥7

Code:

   0:	c4 81 f9 91 04 2e    	kmovd  DWORD PTR [r14+r13*1],k0
   6:	47 8b 24 2e          	mov    r12d,DWORD PTR [r14+r13*1]
   a:	4d 63 e4             	movsxd r12,r12d
   d:	4d 63 e4             	movsxd r12,r12d
  10:	4d 63 e4             	movsxd r12,r12d
  13:	4d 63 e4             	movsxd r12,r12d
  16:	4d 31 e5             	xor    r13,r12
  19:	4d 31 e5             	xor    r13,r12
  1c:	90                   	nop

Init:

MOV R15, 10000;
L: VADDPS YMM0, YMM1, YMM1;
VADDPS YMM0, YMM1, YMM1;
DEC R15;
JNZ L;
VZEROALL;
XOR R13, R13

Show nanoBench command
Results:
- Instructions retired: 9.0
- Core cycles: 17.29
- Reference cycles: 16.06
- UOPS_EXECUTED.THREAD: 9.0

KMOVD (M32, K) - Latency

Operands

Latency operand 1 → 1 (address, base register): ≤10

Latency operand 1 → 1 (address, index register): ≤10

Latency operand 1 → 1 (address, base register): ≤10

Experiment 1

Experiment 2 (with additional nop)

Latency operand 1 → 1 (address, index register): ≤10

Experiment 1

Experiment 2 (with additional nop)