VGATHERDPS (ZMM, K, VSIB_ZMM) - Port Usage

With blocking instructions for port '0':

Code:

   0:	41 0f 7e c0          	movd   r8d,mm0
   4:	41 0f 7e c1          	movd   r9d,mm0
   8:	41 0f 7e c2          	movd   r10d,mm0
   c:	41 0f 7e c3          	movd   r11d,mm0
  10:	41 0f 7e c4          	movd   r12d,mm0
  14:	0f 7e c3             	movd   ebx,mm0
  17:	0f 7e c1             	movd   ecx,mm0
  1a:	0f 7e c2             	movd   edx,mm0
  1d:	41 0f 7e c0          	movd   r8d,mm0
  21:	41 0f 7e c1          	movd   r9d,mm0
  25:	62 92 7d 49 92 04 36 	vgatherdps zmm0{k1},DWORD PTR [r14+zmm14*1]

Init:

MOV R15, 10000;
L: VADDPS ZMM0, ZMM1, ZMM1;
VADDPS ZMM0, ZMM1, ZMM1;
DEC R15;
JNZ L;
PXOR MM0, MM0;
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;
VMOVUPD ZMM0, [R14];
VXORPS ZMM14, ZMM14, ZMM14

Show nanoBench command
Results:
- Instructions retired: 11.0
- Core cycles: 11.25
- Reference cycles: 8.32
- UOPS_PORT_0: 11.0

⇨ One μop that can only use port '0'

With blocking instructions for port '23A':

Code:

   0:	45 8b 46 40          	mov    r8d,DWORD PTR [r14+0x40]
   4:	45 8b 4e 44          	mov    r9d,DWORD PTR [r14+0x44]
   8:	45 8b 56 48          	mov    r10d,DWORD PTR [r14+0x48]
   c:	45 8b 5e 4c          	mov    r11d,DWORD PTR [r14+0x4c]
  10:	45 8b 66 50          	mov    r12d,DWORD PTR [r14+0x50]
  14:	41 8b 5e 54          	mov    ebx,DWORD PTR [r14+0x54]
  18:	41 8b 4e 58          	mov    ecx,DWORD PTR [r14+0x58]
  1c:	41 8b 56 5c          	mov    edx,DWORD PTR [r14+0x5c]
  20:	45 8b 46 40          	mov    r8d,DWORD PTR [r14+0x40]
  24:	45 8b 4e 44          	mov    r9d,DWORD PTR [r14+0x44]
  28:	45 8b 56 48          	mov    r10d,DWORD PTR [r14+0x48]
  2c:	45 8b 5e 4c          	mov    r11d,DWORD PTR [r14+0x4c]
  30:	45 8b 66 50          	mov    r12d,DWORD PTR [r14+0x50]
  34:	41 8b 5e 54          	mov    ebx,DWORD PTR [r14+0x54]
  38:	41 8b 4e 58          	mov    ecx,DWORD PTR [r14+0x58]
  3c:	41 8b 56 5c          	mov    edx,DWORD PTR [r14+0x5c]
  40:	45 8b 46 40          	mov    r8d,DWORD PTR [r14+0x40]
  44:	45 8b 4e 44          	mov    r9d,DWORD PTR [r14+0x44]
  48:	45 8b 56 48          	mov    r10d,DWORD PTR [r14+0x48]
  4c:	45 8b 5e 4c          	mov    r11d,DWORD PTR [r14+0x4c]
  50:	45 8b 66 50          	mov    r12d,DWORD PTR [r14+0x50]
  54:	41 8b 5e 54          	mov    ebx,DWORD PTR [r14+0x54]
  58:	41 8b 4e 58          	mov    ecx,DWORD PTR [r14+0x58]
  5c:	41 8b 56 5c          	mov    edx,DWORD PTR [r14+0x5c]
  60:	45 8b 46 40          	mov    r8d,DWORD PTR [r14+0x40]
  64:	45 8b 4e 44          	mov    r9d,DWORD PTR [r14+0x44]
  68:	45 8b 56 48          	mov    r10d,DWORD PTR [r14+0x48]
  6c:	45 8b 5e 4c          	mov    r11d,DWORD PTR [r14+0x4c]
  70:	45 8b 66 50          	mov    r12d,DWORD PTR [r14+0x50]
  74:	41 8b 5e 54          	mov    ebx,DWORD PTR [r14+0x54]
  78:	62 92 7d 49 92 04 36 	vgatherdps zmm0{k1},DWORD PTR [r14+zmm14*1]

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;
VMOVUPD ZMM0, [R14];
VXORPS ZMM14, ZMM14, ZMM14

Show nanoBench command
Results:
- Instructions retired: 31.0
- Core cycles: 16.21
- Reference cycles: 11.64
- UOPS_PORT_23A: 46.0

⇨ 16 μops that can only use port '23A'

With blocking instructions for port '5':

Code:

   0:	41 0f 6e c0          	movd   mm0,r8d
   4:	41 0f 6e c8          	movd   mm1,r8d
   8:	41 0f 6e d0          	movd   mm2,r8d
   c:	41 0f 6e d8          	movd   mm3,r8d
  10:	41 0f 6e e0          	movd   mm4,r8d
  14:	41 0f 6e e8          	movd   mm5,r8d
  18:	41 0f 6e f0          	movd   mm6,r8d
  1c:	41 0f 6e f8          	movd   mm7,r8d
  20:	41 0f 6e c0          	movd   mm0,r8d
  24:	41 0f 6e c8          	movd   mm1,r8d
  28:	62 92 7d 49 92 04 36 	vgatherdps zmm0{k1},DWORD PTR [r14+zmm14*1]

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;
VMOVUPD ZMM0, [R14];
VXORPS ZMM14, ZMM14, ZMM14

Show nanoBench command
Results:
- Instructions retired: 11.0
- Core cycles: 12.04
- Reference cycles: 8.8
- UOPS_PORT_5B: 12.0
- UOPS_PORT_5B>=2: 0.0

⇨ 2 μops that can only use port '5'