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RE: Processor-specific code
- From: "Dave Korn" <dave dot korn at artimi dot com>
- To: "'Paul Koning'" <pkoning at equallogic dot com>
- Cc: <fortran at gcc dot gnu dot org>,<gcc at gcc dot gnu dot org>
- Date: Fri, 15 Apr 2005 18:20:03 +0100
- Subject: RE: Processor-specific code
>From: Paul Koning
>Sent: 15 April 2005 17:56
>>>>>> "Dave" == Dave Korn <firstname.lastname@example.org> writes:
> Dave> Doesn't the C language spec require the mode to be switchable
> Dave> at runtime?
> Dave> In any case, the ARM or Alpha isn't prevented from working in
> Dave> such a fashion just because the rounding mode is encoded in the
> Dave> instruction; it just means that fp primitives have to be
> Dave> compiled as intrinsics that test whatever flag controls the
> Dave> rounding mode and then branch to an fp insn of the appropriate
> Dave> form.
> That only works if the notion of switchable rounding mode exists.
I'm not sure. Either you don't get me, or I don't get you, but what I
thought I was describing was a way of working around the lack of a
switchable mode by compiling the code both ways with a runtime test of a
Can't think of a witty .sigline today....