Exhaustive comparative testing of your primitives is the only true test of them. https://randomascii.wordpress.com/2014/01/27/theres-only-four-billion-floatsso-test-them-all/ … @BruceDawson0xB
For trig functions and at least 25% of doubles, low single input bit completely changes the output.
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Yeah. If you need 100% accurate rounding, things suck. But even saving 75% (in theory) would help on the million core.
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It's not about accuracy of lowest bits of output but of *all* bits. 1ulp of input is literally 2^53 ulp of output.
End of conversation
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