static EAS_I16 ConvertSustain (EAS_I32 sustain)
{
 /* check for sustain level of zero */
 if (sustain == 0)
 return 0;

 /* convert to log2 factor */
 /*lint -e{704} use shift for performance */
    sustain = (sustain * SUSTAIN_LINEAR_CONVERSION_FACTOR) >> 15;

 if (sustain > SYNTH_FULL_SCALE_EG1_GAIN)
 return SYNTH_FULL_SCALE_EG1_GAIN;
 return (EAS_I16) sustain;
}

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.