VMOVAPS (ZMM, M512) - Latency

Experiment 1

• Instruction: VMOVAPS 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 d1 7c 48 28 06    	vmovaps 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;
  MOV RAX, 0x4000000040000000;
  MOV [R14+0], RAX;
  MOV [R14+8], RAX;
  MOV [R14+16], RAX;
  MOV [R14+24], RAX;
  MOV [R14+32], RAX;
  MOV [R14+40], RAX;
  MOV [R14+48], RAX;
  MOV [R14+56], RAX

• Show nanoBench command
• Results:
  • Instructions retired: 6.0
  • Core cycles: 13.0
  • Reference cycles: 8.74
  • UOPS_EXECUTED.THREAD: 6.01

Experiment 1

• Instruction: VMOVAPS 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 91 7c 48 28 04 2e 	vmovaps 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;
  MOV RAX, 0x4000000040000000;
  MOV [R14+0], RAX;
  MOV [R14+8], RAX;
  MOV [R14+16], RAX;
  MOV [R14+24], RAX;
  MOV [R14+32], RAX;
  MOV [R14+40], RAX;
  MOV [R14+48], RAX;
  MOV [R14+56], RAX;
  XOR R13, R13

• Show nanoBench command
• Results:
  • Instructions retired: 6.0
  • Core cycles: 13.0
  • Reference cycles: 9.2
  • UOPS_EXECUTED.THREAD: 6.01

Experiment 1

• Instruction: VMOVAPS ZMM0, zmmword ptr [R14]
• Chain instructions: VSHUFPD ZMM13, ZMM0, ZMM0, 0;VSHUFPD ZMM13, ZMM13, ZMM13, 0;VSHUFPD ZMM13, ZMM13, ZMM13, 0;VSHUFPD ZMM13, ZMM13, ZMM13, 0;VSHUFPD ZMM13, ZMM13, ZMM13, 0;VMOVUPD [R14], ZMM13
• Chain latency: ≥6
• Code:

     0:	62 d1 7c 48 28 06    	vmovaps zmm0,ZMMWORD PTR [r14]
     6:	62 71 fd 48 c6 e8 00 	vshufpd zmm13,zmm0,zmm0,0x0
     d:	62 51 95 48 c6 ed 00 	vshufpd zmm13,zmm13,zmm13,0x0
    14:	62 51 95 48 c6 ed 00 	vshufpd zmm13,zmm13,zmm13,0x0
    1b:	62 51 95 48 c6 ed 00 	vshufpd zmm13,zmm13,zmm13,0x0
    22:	62 51 95 48 c6 ed 00 	vshufpd zmm13,zmm13,zmm13,0x0
    29:	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;
  MOV RAX, 0x4000000040000000;
  MOV [R14+0], RAX;
  MOV [R14+8], RAX;
  MOV [R14+16], RAX;
  MOV [R14+24], RAX;
  MOV [R14+32], RAX;
  MOV [R14+40], RAX;
  MOV [R14+48], RAX;
  MOV [R14+56], RAX

• Show nanoBench command
• Results:
  • Instructions retired: 7.0
  • Core cycles: 11.0
  • Reference cycles: 8.28
  • UOPS_EXECUTED.THREAD: 8.0

Experiment 2

• Instruction: VMOVAPS 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 d1 7c 48 28 06    	vmovaps 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;
  MOV RAX, 0x4000000040000000;
  MOV [R14+0], RAX;
  MOV [R14+8], RAX;
  MOV [R14+16], RAX;
  MOV [R14+24], RAX;
  MOV [R14+32], RAX;
  MOV [R14+40], RAX;
  MOV [R14+48], RAX;
  MOV [R14+56], RAX

• Show nanoBench command
• Results:
  • Instructions retired: 7.0
  • Core cycles: 10.99
  • Reference cycles: 8.28
  • UOPS_EXECUTED.THREAD: 8.0