setend

Set Endianness (Thumb)

SETEND <endian>

Set endianness (Thumb).

Pseudocode Operation

if endian == 'BE' then
  CPSR.E ← 1
elsif endian == 'LE' then
  CPSR.E ← 0

Example

SETEND endian

Encoding

Binary Layout
1011011001
15:6
0
5
1
4
E
3
000
2:0
 
Format Thumb System
Opcode 0xB650
Extension T32 (System)

Operands

  • endian
    BE/LE

Related

Other forms of setend

More in T32 (System)

Reference

View in Arm A64 ISA Reference ↗ Arm AArch32 ISA

Instruction Forms

Encoding Instruction ISA Bit pattern
0xF1010000 SETEND{<q>} <endian_specifier> A32 111100010000 | 00 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | E | 0 | 0 | 0 | 0 | 00000
0xB650 SETEND{<q>} <endian_specifier> T32 1011011001 | 0 | 1 | E | 000

Description

Set Endianness writes a new value to PSTATE.E.

Operation

EncodingSpecificOperations();
AArch32.CheckSETENDEnabled();
PSTATE.E = if set_bigend then '1' else '0';