Re: [PATCH] Improve geometric types

If you look at the differing results carefully, there's this one:

*** 3249,3255 ****
!  [(0,0),(3,0),(4,5),(1,6)] | (-5,-12)          | [(0,-0),(-15,-36),(40,-73),(67,-42)]
--- 3249,3255 ----
!  [(0,0),(3,0),(4,5),(1,6)] | (-5,-12)          | [(0,0),(-15,-36),(40,-73),(67,-42)]

(Third column is first multiplied by second).

I wonder why the expected file has a -0 only in the second position and
not both first and second.  These are both positive zeroes being
multiplied by a negative number.  Why is 0 * -12 = -0  yet  0 * -5 = 0?
What is going on?  Is the sign suppressed for negative zeros only in the
first coordinate?  I suppose this is just a side effect of how
float8_mi, _pl, _mul work (in point_mul_point).

Anyway maybe your test case should use more of the float8 op
combinations in order to show the difference.

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
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