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How do change the rounding for XMM registers in debugger ?

 
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peddroelm
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Joined: 03 Oct 2014
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PostPosted: Thu Jan 11, 2018 4:34 am    Post subject: How do change the rounding for XMM registers in debugger ? Reply with quote

Attempting to fallow/reverse engineer a asm function becomes useless if the FPU displays say xmm0 1.00 as the base of an exponential instead of say 1.0027 .. Rounds 1.0017 to 1.01 etc..

Sometimes precision really matters.

And is it possible to display the FPU window twice ?

asm likes to play shells game with the xmm registers - single to double to single to stack to double to single to double to single to double ... Would be nice be able to see in the same time the xmm registers both as foat and as double .. At any one time some xmm registers are loaded with floats and some with doubles ..
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Csimbi
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Joined: 14 Jul 2007
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PostPosted: Thu Jan 11, 2018 11:49 am    Post subject: Reply with quote

I did not find a way.
I do have a hex-decimal converter I coded for myself to get the accurate floating point numbers.
(It's not just XMM registers, it's also the FPU, incorrectly determined type in traced stack and so on).
So, look at the XMM registers as if they were ints, copy the hex values and convert them to float/double yourself.
I have not bothered reporting it, but do report it in case you feel strong about.
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