vinswvlx

Vector Insert Word from VSR using GPR-specified Left-Index VX-form

vinswvlx VRT,RA,VRB

Inserts a word from a vector register into another vector register at a position specified by a general-purpose register.

Encoding

Binary Layout

0

0:5

VRT

6:10

RA

11:15

VRB

16:31

 

Format VX-form

Opcode 0x1000008F

Extension VMX (AltiVec)

Operands

• VRT
  Target Vector Register
• RA
  Source General Purpose Register
• VRB
  Source Vector Register

Example

vinswvlx v1, r4, v3

Related

More in VMX (AltiVec)

Reference

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

Description

The contents of bits 32:63 of VSR[VRB+32] are placed into byte elements index:index+3 of VSR[VRT+32], where index is the contents of bits 60:63 of GPR[RA].

Operation

if MSR.VEC=0 then
    Vector_Unavailable()
index ← GPR[RA].bit[60:63]
VSR[VRT+32].byte[index:index+3] ← VSR[VRB+32].bit[32:63]

Programming Note

This instruction is used to insert a 4-byte word from one vector register into another, with the destination index specified by the upper 4 bits of a general-purpose register. Ensure that the MSR.VEC bit is set to enable vector operations; otherwise, a Vector_Unavailable exception will be raised. The source and destination registers must be in the range V32-V63. Be cautious of alignment issues if the index does not align with byte boundaries.