Re: Lua number type and 64-bit machines

[Rob Kendrick <lua-l@...>]

On Fri, 06 Mar 2009 15:04:52 +0000
Polarina <gabrielp@simnet.is> wrote:

> On Fri, 2009-03-06 at 09:57 -0500, Javier Guerra wrote:
> > On Fri, Mar 6, 2009 at 9:43 AM, Gabríel A. Pétursson
> > <gabrielp@simnet.is> wrote:
> > > The x86_64 and x86 do support long doubles in hardware. Other
> > > architectures do not.
> > 
> > [citation requested]


> >From http://en.wikibooks.org/wiki/X86_Assembly/Floating_Point:
> "Floating point numbers may generally be either 32 bits long (C
> "float" type), or 64 bits long (C "double" type). However, in order
> to reduce round-off errors, the FPU stack registers are all 80 bits
> wide."
>
> The 80-bit wide FPU stack registers are long double.

What about the other assertion, "Other architectures do not." ?

:)

B.