sthep

Store Halfword External Process ID Indexed

sthepx RS, RA, RB

Stores a halfword using the External PID.

Encoding

Binary Layout

31

0:5

RS

6:10

RA

11:15

RB

16:20

223

21:30

/

31

 

Format X-form

Opcode 0x7C0001BE

Extension Embedded

Operands

• RS
  Source
• RA
  Base
• RB
  Index

Example

sthepx r3, r4, r5

Related

More in Embedded

Reference

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

Description

Stores a halfword (16-bit value) to memory using an address formed by adding RA and RB, performing the store using the External PID for address translation in embedded environments. The least significant halfword of RS is written to memory. No condition flags are affected.

Operation

EA ← (RA) + (RB)
[EA + 0:1] ← (RS)[48:63]