Anthony Williams wrote:
"John C. Femiani" <john.femiani@asu.edu> writes:
Anthony Williams wrote:
"John C. Femiani" <john.femiani@asu.edu> writes:
Also, do your implementations for /= and *= actually round? You actually seem to be using the round policy for conversions, is that right? Have you looked at the numeric/conversion stuff? (I haven't grokked it yet).
The division throws away the lower "frac_bits" of the result: So why doesn't it use the rounding policy? I kind of expect it to be used anytime quantization occurs.
I'll leave Neal to answer that (it's his code), but getting division right is a pain. If you followed the link to my code, you'll see that correct division is not trivial.
Anthony
Multiplication is a bit easier to understand. I thought about mixed-arith mult, but I think it opens a can of worms. What do you want the result to be? So, I decided to only support arith of like-types. If you want the result of mult to be a larger type, then you simply ask for it: fixed<8,8> x, y; fixed<16,16> z = fixed<16,16> (x) * fixed<16,16> (y); As far as division, I wasn't quite sure and the implementation shown is only a guess. Suggestions welcome.