Walter, thanks for clarifying this. - Def

In article <dtfpdh$2gih$2@digitaldaemon.com>, Walter Bright says...
>
>
>"Def" <Def_member@pathlink.com> wrote in message news:dtf8t0$1uh4$1@digitaldaemon.com...
>> This question remains unanswered. I assume 386 and higher, but is it correct? It is important to mark my apps to the end user as "needs 386 or higher" or whatever.
>
>Yes, it's 386 or higher.
>
>>>> If so, what processor will DMD optimize the code for if the -O option is invoked?
>>>
>>>Pentium 6
>>
>> This is an unusual term, for me at least. If, for example, we refer to http://en.wikipedia.org/wiki/Pentium_1 then which processor is the one you mean exactly?
>
>Pentium Pro.
>
>

Walter Bright wrote:

>>This question remains unanswered. I assume 386 and higher, but is it
>>correct? It is important to mark my apps to the end user as "needs 386 or
>>higher" or whatever.
> 
> Yes, it's 386 or higher.
> 
>>>>If so, what processor will DMD optimize the code for if the -O option is
>>>>invoked?
>>>
>>>Pentium 6
>>
>>This is an unusual term, for me at least. If, for example, we refer to
>>http://en.wikipedia.org/wiki/Pentium_1 then which processor is the one
>>you mean exactly?
> 
> Pentium Pro. 

In case anyone wonders, the equivalent flags for GDC are:

Old style:
  -march=i386 -mcpu=i686

New style:
  -march=i386 -mtune=pentium4

(as used by RPM, which builds as .i386.rpm by default even
though usually a Pentium or better is required in practice)

Where:
  i586 == pentium
  i686 == pentiumpro

http://gcc.gnu.org/onlinedocs/gcc-4.0.2/gcc/i386-and-x86_002d64-Options.html

--anders

"pmoore" <pmoore_member@pathlink.com> wrote in message news:dtft1s$2kee$1@digitaldaemon.com...
> Walter, Does DMC actually emit any Pentium Pro instructions eg. CMOV, FCMOV?

No.

> If
> not I would class it as 486 or higher as it definitely _does_ require a
> FPU.

An FPU is not required, as Win32 will emulate the FPU on a 386 if there isn't one. This *could* be a problem on the DOS32 system, but DMC will generate calls to its own emulator for that.

Also, the 386 did have a 387 FPU available for it.

Walter Bright wrote:
>> Hello, I assume that DMD generates code for 386 and higher. Is this correct?
>> If so, what processor will DMD optimize the code for if the -O option is
>> invoked?
> 
> Pentium 6 

Wow! And we're currently at Pentium 4! Talk about bleeding edge!

I just had to say it <g>

-- 
Niko Korhonen
SW Developer