Arm/shifts

One common case where you need to shift and truncate numbers is when changing the amplitude of audio samples.

For this problem, write a function (named shift) that will accept a 32-bit signed audio sample, and return a 32-bit signed audio sample with 1/4 of the amplitude. Don't do any rounding (just shift and truncate).

Expected solution length: Around 2 lines.

Sample Input

0x40000

Sample Output

0x10000

// A test case to test your function with

.global _start
_start:
    ldr r0, =0x40000
    bl shift
    b _start        // End of testing code

// Return 1/4 amplitude for a S32 sample
shift:

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Sample Input

Sample Output

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