Nios/saturate

Sometimes when doing arithmetic, it is better to "saturate" (or clamp) numbers that overflow to the maximum possible value rather than wrap around.

Write a function that will convert an unsigned 32-bit number to 16 bits. If the 32-bit number is too big to fit, saturate (or clamp) the output to the maximum possible unsigned 16-bit value.

unsigned short saturate(unsigned int n);

Sample Input

0x12345

Sample Output

0xffff

# A test case to test your function with
.global _start
_start:
    movia r4, 0x12345    # First parameter is always in r4
    call saturate
    br _start        # End of testing code

# Convert unsigned 32 bit to 16 bit, with saturation
saturate:

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Sample Input

Sample Output

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