VMOVNTDQA (ZMM, M512) - Latency

Experiment 1

• Instruction: VMOVNTDQA ZMM0, zmmword ptr [R14]
• Chain instructions: VMOVQ R12, XMM0;XOR R14, R12;XOR R14, R12;XOR R14, R12;XOR R14, R12
• Chain latency: ≥5
• Code:

     0:	62 d2 7d 48 2a 06    	vmovntdqa zmm0,ZMMWORD PTR [r14]
     6:	c4 c1 f9 7e c4       	vmovq  r12,xmm0
     b:	4d 31 e6             	xor    r14,r12
     e:	4d 31 e6             	xor    r14,r12
    11:	4d 31 e6             	xor    r14,r12
    14:	4d 31 e6             	xor    r14,r12
  

• Init:

  MOV R15, 10000;
  L: VADDPS ZMM0, ZMM1, ZMM1;
  VADDPS ZMM0, ZMM1, ZMM1;
  DEC R15;
  JNZ L;
  VZEROALL

• Show nanoBench command
• Results:
  • MPERF: 11.91
  • APERF: 14.0
  • UOPS: 6.0

Experiment 1

• Instruction: VMOVNTDQA ZMM0, zmmword ptr [R14+R13]
• Chain instructions: VMOVQ R12, XMM0;XOR R13, R12;XOR R13, R12;XOR R13, R12;XOR R13, R12
• Chain latency: ≥5
• Code:

     0:	62 92 7d 48 2a 04 2e 	vmovntdqa zmm0,ZMMWORD PTR [r14+r13*1]
     7:	c4 c1 f9 7e c4       	vmovq  r12,xmm0
     c:	4d 31 e5             	xor    r13,r12
     f:	4d 31 e5             	xor    r13,r12
    12:	4d 31 e5             	xor    r13,r12
    15:	4d 31 e5             	xor    r13,r12
  

• Init:

  MOV R15, 10000;
  L: VADDPS ZMM0, ZMM1, ZMM1;
  VADDPS ZMM0, ZMM1, ZMM1;
  DEC R15;
  JNZ L;
  VZEROALL;
  XOR R13, R13

• Show nanoBench command
• Results:
  • MPERF: 11.99
  • APERF: 14.0
  • UOPS: 6.0

Experiment 1

• Instruction: VMOVNTDQA ZMM0, zmmword ptr [R14]
• Chain instructions: VANDPD ZMM13, ZMM0, ZMM0;VANDPD ZMM13, ZMM13, ZMM13;VANDPD ZMM13, ZMM13, ZMM13;VANDPD ZMM13, ZMM13, ZMM13;VANDPD ZMM13, ZMM13, ZMM13;VMOVUPD [R14], ZMM13
• Chain latency: ≥6
• Code:

     0:	62 d2 7d 48 2a 06    	vmovntdqa zmm0,ZMMWORD PTR [r14]
     6:	62 71 fd 48 54 e8    	vandpd zmm13,zmm0,zmm0
     c:	62 51 95 48 54 ed    	vandpd zmm13,zmm13,zmm13
    12:	62 51 95 48 54 ed    	vandpd zmm13,zmm13,zmm13
    18:	62 51 95 48 54 ed    	vandpd zmm13,zmm13,zmm13
    1e:	62 51 95 48 54 ed    	vandpd zmm13,zmm13,zmm13
    24:	62 51 fd 48 11 2e    	vmovupd ZMMWORD PTR [r14],zmm13
  

• Init:

  MOV R15, 10000;
  L: VADDPS ZMM0, ZMM1, ZMM1;
  VADDPS ZMM0, ZMM1, ZMM1;
  DEC R15;
  JNZ L;
  VZEROALL

• Show nanoBench command
• Results:
  • MPERF: 15.04
  • APERF: 17.4
  • UOPS: 8.0

Experiment 2

• Instruction: VMOVNTDQA ZMM0, zmmword ptr [R14]
• Chain instructions: VPANDD ZMM13, ZMM0, ZMM0;VPANDD ZMM13, ZMM13, ZMM13;VPANDD ZMM13, ZMM13, ZMM13;VPANDD ZMM13, ZMM13, ZMM13;VPANDD ZMM13, ZMM13, ZMM13;VMOVDQU64 [R14], ZMM13
• Chain latency: ≥6
• Code:

     0:	62 d2 7d 48 2a 06    	vmovntdqa zmm0,ZMMWORD PTR [r14]
     6:	62 71 7d 48 db e8    	vpandd zmm13,zmm0,zmm0
     c:	62 51 15 48 db ed    	vpandd zmm13,zmm13,zmm13
    12:	62 51 15 48 db ed    	vpandd zmm13,zmm13,zmm13
    18:	62 51 15 48 db ed    	vpandd zmm13,zmm13,zmm13
    1e:	62 51 15 48 db ed    	vpandd zmm13,zmm13,zmm13
    24:	62 51 fe 48 7f 2e    	vmovdqu64 ZMMWORD PTR [r14],zmm13
  

• Init:

  MOV R15, 10000;
  L: VADDPS ZMM0, ZMM1, ZMM1;
  VADDPS ZMM0, ZMM1, ZMM1;
  DEC R15;
  JNZ L;
  VZEROALL

• Show nanoBench command
• Results:
  • MPERF: 15.04
  • APERF: 17.34
  • UOPS: 8.0