Hi
fortunately, no, I don't need double branch here. "cmpvs reg0, reg0"
is a
conditional instruction, which only executes if the v flag is set.
My proposal would be to add a new DoubleCondition called
DoubleEqualOrNAN,
or something similar to clarify what we expect from the conditional
branch. Since I feel (and by IEEE as you mentioned) a comparison to
NaN
should be false, not true as x86 actually does.
Yes, I think this is a great approach.
I would slightly prefer "DoubleEqualOrUnordered" to "NaN", since
"unordered" matches the terminology of assembly languages.
I haven't thought this through fully, but you'll probably need
DoubleNotEqualAndNotUnordered as well.
Geoff
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