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On Wed, 6 Sep 2017, Walter Banks wrote:
> I depends how much you know about the numbers. This works as long as the
> MSbit of x is 0.
> No magic in this and not particularly fast.
> // divide x/y and return a fraction
> // x < y always
> // reference in 16 bits
> uint16_t div_fract (uint16_t x,y)
> char count = 16 ; // size of result in bits
> x <<= 1;
> if (x >= y)
> x -= y;
> x |= 1;
> return x;
Hi Walter, I don't understand how the above is supposed to work.
Surely the "x |= 1" is wrong? Don't you need a seperate variable build the
On a mid range PIC the "(x >= y)" would need to be performed as
"(x - y >= 0)" so why not compute "x = x - y" and compare with 0?
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