stbepx

Store Byte External Process ID Indexed

stbepx RS, RA, RB

Stores a byte using the External PID.

Details

Stores a byte (8-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 byte of RS is written to memory. No condition flags are affected.

Pseudocode Operation

EA ← (RA) + (RB)
[EA] ← (RS)[56:63]

Example

stbepx r3, r4, r5

Encoding

Binary Layout
31
0
RS
6
RA
11
RB
16
159
21
/
31
 
Format X-form
Opcode 0x7C00013E
Extension Embedded

Operands

  • RS
    Source
  • RA
    Base
  • RB
    Index