### Compilation failed:

error: 7: unknown identifier 'packSnorm2x16'
    const uint constXY = packSnorm2x16(constVal.xy);
                         ^^^^^^^^^^^^^
error: 8: unknown identifier 'packSnorm2x16'
    const uint constZW = packSnorm2x16(constVal.zw);
                         ^^^^^^^^^^^^^
error: 9: unknown identifier 'packSnorm2x16'
    uint xy = packSnorm2x16(testInputs.xy);
              ^^^^^^^^^^^^^
error: 10: unknown identifier 'packSnorm2x16'
    uint zw = packSnorm2x16(testInputs.zw);
              ^^^^^^^^^^^^^
error: 13: unknown identifier 'unpackSnorm2x16'
    return (all(lessThan(abs(unpackSnorm2x16(xy)      - float2(expected.xy)), tolerance)) &&
                             ^^^^^^^^^^^^^^^
error: 13: unknown identifier 'xy'
    return (all(lessThan(abs(unpackSnorm2x16(xy)      - float2(expected.xy)), tolerance)) &&
                                             ^^
error: 14: unknown identifier 'unpackSnorm2x16'
            all(lessThan(abs(unpackSnorm2x16(zw)      - float2(expected.zw)), tolerance)) &&
                             ^^^^^^^^^^^^^^^
error: 14: unknown identifier 'zw'
            all(lessThan(abs(unpackSnorm2x16(zw)      - float2(expected.zw)), tolerance)) &&
                                             ^^
error: 15: unknown identifier 'unpackSnorm2x16'
            all(lessThan(abs(unpackSnorm2x16(constXY) - float2(expected.xy)), tolerance)) &&
                             ^^^^^^^^^^^^^^^
error: 15: unknown identifier 'constXY'
            all(lessThan(abs(unpackSnorm2x16(constXY) - float2(expected.xy)), tolerance)) &&
                                             ^^^^^^^
error: 16: unknown identifier 'unpackSnorm2x16'
            all(lessThan(abs(unpackSnorm2x16(constZW) - float2(expected.zw)), tolerance)))
                             ^^^^^^^^^^^^^^^
error: 16: unknown identifier 'constZW'
            all(lessThan(abs(unpackSnorm2x16(constZW) - float2(expected.zw)), tolerance)))
                                             ^^^^^^^
12 errors