Inconsistent definition of the square root of negative 0

[akirilov-arm]

I noticed a minor issue with the definition of the square root operator - it implies that the square root of negative 0 is a NaN:

• If z is a NaN, then return an element of nans_N{z}.
• Else if z has a negative sign, then return an element of nans_N{}.
• Else if z is positive infinity, then return positive infinity.
• Else if z is a zero, then return that zero.
• Else return the square root of z.

Note that this is a contradiction with the formal notation that follows (and which specifies that the result is negative 0).

[rossberg]

Indeed, thanks! See #1227.

[Ms2ger]

Do we have a test for this?

[rossberg]

Yes, e.g., f32.wast:2419.