stxvx

Store VSX Vector Indexed X-form

stxvx xW,r0,rPW

Stores a vector element from the VSX register file to memory.

Encoding

Binary Layout
101100
0:5
XS
6:8
00000
9
rA
10
rB
11:15
00000
16:20
00000
21:30
00000
31
 
Format X-form
Opcode 0x7C000318
Extension VSX

Operands

  • XS
    VSX Register Index
  • RA
    Source General Purpose Register for Base Address
  • RB
    Source General Purpose Register for Offset
  • xW
    VSX Register containing the vector to store
  • r0
    General Purpose Register (typically used as zero register)
  • rPW
    Base address General Purpose Register for W
  • rPX
    Base address General Purpose Register for X
  • rPY
    Base address General Purpose Register for Y
  • rPZ
    Base address General Purpose Register for Z

Example

stxvx xw, r0, rpw

Registers Altered

MSR

Related

More in VSX

Reference

View in PowerISA v3.1C Specification ↗ OPF Power ISA v3.1C

Description

Stores a 128-bit VSX vector element to memory using indexed addressing in X-form. The effective address is computed as (RA|0) + RB, and the vector is stored with element size determined by the instruction form. This VSX instruction does not affect condition registers or status flags.

Operation

EA ← (RA|0) + RB
[EA] ← VSR[XS]

Programming Note

The stxvx instruction is used for storing VSX vectors to memory. The index value in XS is multiplied by 16 bytes.