in reply to Need more precision.

BrowserUk:

Update: I just read the article in more detail, and I don't think it's what you want.

I've not used it, but the xmmintrin.h header file contains some functions to work with SSE numbers. You might look at it see if it suits. An article I tripped over seems to provide some explanation:http://www.codeproject.com/Articles/4522/Introduction-to-SSE-Programming. I only skimmed the article, so I don't know if it has enough detail to get you going.

...roboticus

When your only tool is a hammer, all problems look like your thumb.

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Re^2: Need more precision.
by BrowserUk (Patriarch) on Jun 09, 2015 at 21:57 UTC
    I just read the article in more detail, and I don't think it's what you want.

    Indeed. I wasted an afternoon trying to find some way to get more precision out of SSE/2 but they are about SIMD; performing multiple (2xdouble or 4xfloat) operations in parallel.

    I don't see any way to get more precision out of them. I thought for a while it might be possible to use two doubles as a kind limited kind of multi-precision, but there is no carry-over facility.

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