I maintain a javascript PRNG which relies on basic floating point math operations, addition and multiplication. Its test page here (https://strainer.github.io/Fdrandom.js/) displays a warning if it doesn't hit expected value 1 million rnds after default seeding. I've not found any computer or phone fail that basic compliance test yet. Differences in trig functions strikes me as more matter of Math library compliance that floating point unit, im not sure but would be hopeful these are fairly well standardised across javascript engines.