SETEND
Set Endianness
Set Endianness writes a new value to
PSTATE.E.
For more information about the CONSTRAINED UNPREDICTABLE behavior of this instruction, see Architectural Constraints on UNPREDICTABLE behaviors.
It has encodings from the following instruction sets:
A32 (
A1
)
and
T32 (
T1
)
.
1
1
1
1
0
0
0
1
0
0
0
0
(0)
(0)
(0)
1
(0)
(0)
(0)
(0)
(0)
(0)
(0)
0
0
0
0
(0)
(0)
(0)
(0)
SETEND{<q>} <endian_specifier>
let set_bigend : boolean = (E == '1');
1
0
1
1
0
1
1
0
0
1
0
(1)
(0)
(0)
(0)
SETEND{<q>} <endian_specifier>
let set_bigend : boolean = (E == '1');
if InITBlock() then UnpredictableProcedure(); end;
<q>
See Standard assembler syntax fields.
<endian_specifier>
Is the endianness to be selected, and the value to be set in PSTATE.E,
E
<endian_specifier>
0
LE
1
BE
EncodingSpecificOperations();
AArch32_CheckSETENDEnabled();
PSTATE.E = if set_bigend then '1' else '0';
2026-03-12 12:23:09
2025-09_rel_asl1