Sign extend Byte, to extend an 8-bit value to a 32-bit value.
is an optional condition code.
is the destination register.
is the register holding the value to extend.
is one of:
is rotated right 8 bits.
is rotated right 16 bits.
is rotated right 24 bits.
is omitted, no rotation is performed.
This instruction does the following:
Rotates the value from
right by 0, 8, 16 or 24 bits.
Extracts bits[7:0] from the value obtained.
Sign extends to 32 bits.
You cannot use PC for any operand.
You can use SP in A32 instructions but this is deprecated. You cannot use SP in T32 instructions.
This instruction does not change the flags.
The following form of this instruction is available in T32 code, and is a 16-bit instruction:
must both be Lo registers.
The 32-bit instruction is available in A32 and T32.
For the Arm®v7‑M architecture, the 32-bit T32 instruction is only available in an Armv7E-M implementation.
The 16-bit instruction is available in T32.