vbrd

Vector Byte-Reverse Doubleword

vbrd vD, vB

Reverses bytes within each doubleword.

Details

Reverses the byte order within each 64-bit doubleword of the source vector and stores the result in the destination vector. This instruction operates on two doublewords in parallel across the 128-bit vector. No condition flags are affected; this is a VMX/AltiVec instruction.

Pseudocode Operation

vD[0:63] ← vB[56:63] || vB[48:55] || vB[40:47] || vB[32:39] || vB[24:31] || vB[16:23] || vB[8:15] || vB[0:7]
vD[64:127] ← vB[120:127] || vB[112:119] || vB[104:111] || vB[96:103] || vB[88:95] || vB[80:87] || vB[72:79] || vB[64:71]

Example

vbrd vd, vb

Encoding

Binary Layout
4
0
vD
6
0
11
vB
16
1734
21
 
Format VX-form
Opcode 0x100006C6
Extension VMX (AltiVec)

Operands

  • vD
    Target
  • vB
    Source