Re: is real*8 a standard declaration style?
- From: Tim Prince <tprince@xxxxxxxxxxxx>
- Date: Mon, 31 Oct 2011 07:53:20 -0400
On 10/31/2011 1:21 AM, Steven G. Kargl wrote:
On Mon, 31 Oct 2011 00:06:59 -0500, Robert Miles wrote:Windows libraries, however, don't support 80-bit format, and 32-bit applications using those libraries are expected to set 53-bit precision. The X64 Windows sets 53-bit precision before launching an application.
On 10/29/2011 7:59 AM, Daniel Carrera wrote:On 10/29/2011 02:14 PM, Jinsong Zhao wrote:[snip]! Extended precision (80 format for for Intel CPUs). integer, parameter
:: extn = selected_real_kind(18)
You might want to check if that still applies. The last I knew, the
older Intel CPUs that used a separate FPU chip had the 80-bit format,
but the newer ones with the CPU and the FPU on the same chip didn't.
Nope. Any chip that supports the i387 instruction set has the
80-bit Intel format available. This includes a large selection
of single chip cpu+fpu products from Intel, AMD, and licensees.
Intel compilers (even on linux) make an application by default which sets 53-bit precision.
So it's likely that many people haven't used 64-bit precision/80-bit format for years. As Steven pointed out, the hardware continues to support it.
- Prev by Date: Re: May I ask a Linux question/ Yacc and Lex
- Next by Date: Re: May I ask a Linux question/ Yacc and Lex
- Previous by thread: Re: is real*8 a standard declaration style?
- Next by thread: Re: is real*8 a standard declaration style?