Re: Lua number type and 64-bit machines
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- Subject: Re: Lua number type and 64-bit machines
- From: Polarina <gabrielp@...>
- Date: 2009年3月06日 15:17:52 +0000
On Fri, 2009年03月06日 at 15:12 +0000, Rob Kendrick wrote:
> On 2009年3月06日 15:04:52 +0000
> Polarina <gabrielp@simnet.is> wrote:
>
> > On Fri, 2009年03月06日 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.
It remains a [citation needed], sorry.