Reverse the byte order in the bottom halfword, and sign extend to 32 bits.
is an optional condition code.
is the destination register.
is the register holding the operand.
You can use this instruction to change endianness.
16-bit signed big-endian data into 32-bit signed little-endian data.
16-bit signed little-endian data into 32-bit signed big-endian data.
You cannot use PC for any register.
You can use SP in ARM instructions but this is deprecated in ARMv6T2 and above. You cannot use SP in Thumb instructions.
This instruction does not change the flags.
The following form of this instruction is available in Thumb code, and is a 16-bit instruction:
REVSH Rd, Rm
Rmmust both be Lo registers.
This ARM instruction is available in ARMv6 and above.
This 32-bit Thumb instruction is available in ARMv6T2 and above.
This 16-bit Thumb instruction is available in ARMv6 and above.
REVSH r0, r5 ; Reverse Signed Halfword