Question/request/bug(?) re. floating-point in dmd

[Joseph Rushton Wakeling]

On 23/10/13 18:16, Walter Bright wrote:
> To precisely control maximum precision, I suggest using inline assembler to use
> the exact sequence of instructions needed for double-double operations.

Could be relevant here: last year I wrote some code which divided up the closed 
interval [0, 1] into small increments.  If the division was by powers of 10, dmd 
would wind up mis-calculating; with powers of 2, it was fine.

By contrast GDC and LDC were fine, which makes me think their backends must 
implement effective decimal support for floating-point within certain limited 
bounds.