Re: "FP precision conv" with no floats in sight

• Subject: Re: "FP precision conv" with no floats in sight
• From: Paul Sargent <email@hidden>
• Date: Sat, 30 Oct 2004 11:06:50 +0100
• Delivered-to: email@hidden
• Delivered-to: email@hidden

You're right several are pointless, but at least the ones like this may not be (although they seem so at first sight):

frsp     f1,f2
stfs     f2,20(r28)

The reason is that some PPC's have a bug, whereby they throw an exception if you try to store an fpu value as a single without first explicitly rounding it to a single. I have to admit I'm not sure whether it can also pop up if the value in question has only been "touched" by single precision fpu ops though.

e.g.

f1 = frsp(f2)
store(f2)

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