I assume with a "pragma" you'd be able to specify different rounding modes for different sections of the program at compile time? Either way compile-time math is so useful it seems ridiculous for the standard to explicitly state it is not allowed at all. On Fri, Feb 14, 2020 at 11:06 AM Marc Glisse <marc.glisse@xxxxxxxx> wrote: > On Fri, 14 Feb 2020, Timothy Wrona wrote: > > > Just curious, but why couldn't you decide the rounding mode at compile > time > > and pass the desired rounding mode as an argument to the compiler? > > Usually we need several different rounding modes in the same program. > > The draft of the future C standard does have some pragma that might help, > but seeing how hard it is to find implementations of pragma fenv, that may > be optimistic. > > -- > Marc Glisse >
