Arm/bswap

When communicating multi-byte (hword or word) values between machines of different endianness, it is sometimes necessary to swap the byte ordering. Write a function that will reverse the byte ordering in a 32-bit word. (Note that only bytes are swapped. The 8 bits within each byte are still in the same order.)

The function has one parameter: The input number.

Expected solution length: Around 2 lines.

Sample Input

0x11223344

Sample Output

r0=0x44332211

// A test case to test your function with
.global _start
_start:
    ldr r0, =0x11223344
    bl bswap
    b _start        // End of testing code

// Byte swap
bswap:

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Arm/bswap

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