[Open-graphics] Synthesizing oga1hq

[Petter Urkedal]

On 2007-08-13, Timothy Normand Miller wrote:
> I like the idea of having the 16x16 multiplier and adding code to do
> larger.  I feel that 16x16 would be common, while anything larger
> would be rare.  For instance, in the GPU, we will often have places
> where we multiply a 16-bit Y coordinate by a 16-bit line stride, then
> add a 16-bit X coordinate.

Good, the 16x16 solution was my favourite to sell :-)

> I forget.  Do we care about signed multiplies?

I did when I wrote the current version.  I'm not the expert of what
we will need, but the sign logic is cheap anyway, right?