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Christos Christodoulou
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Mark Hahn wrote:
A common confusion ... x86_64 changes nothing about the precision of
floats or doubles in
C or Fortran.
well, sort of. it was pretty common to find at least some computations
in ia32 using 80b FP, intentionally or not. but iirc in long mode
(colloquially x86_64), you no long
A common confusion ... x86_64 changes nothing about the precision of floats
or doubles in
C or Fortran.
well, sort of. it was pretty common to find at least some computations
in ia32 using 80b FP, intentionally or not. but iirc in long mode
(colloquially x86_64), you no longer get x87 access.
Thank you for all the answers.. now the subject is clearer. And I thought
that I knew something about comp. architecture... Thanks!
Ivan
2006/11/22, Richard Walsh <[EMAIL PROTECTED]>:
Ivan Paganini wrote:
> Hello everybody at beowulf. Sorry about the _really_ newbie question,
> but after doing
Ivan Paganini wrote:
Hello everybody at beowulf. Sorry about the _really_ newbie question,
but after doing some tests and researching a little, a question arose
when fooling around with amd64 (more precisely, an amd64 Athlon 4200
X2) and gcc and sun studio 11. The architecture has 64 bits integ
Thank you Jonh and Vincent for the answers!
Well, I did a little more research, and tested a very simple code (anexed).
Ran ldd on it, and got
+
[EMAIL PROTECTED]:~$ ldd a.out
libc.so.6 => /lib/libc.so.6 (0x2b630e4d5000)
/lib64/ld-linux-x86-64.so.2 (0x2b630e3b8000)
+
So I t
On Wed, Nov 22, 2006 at 09:01:54AM -0200, Ivan Paganini wrote:
> Hello everybody at beowulf. Sorry about the _really_ newbie question, but
> after doing some tests and researching a little, a question arose when
> fooling around with amd64 (more precisely, an amd64 Athlon 4200 X2) and gcc
> and sun
Of course I forgot the code... ;-)
2006/11/22, Ivan Paganini <[EMAIL PROTECTED]>:
Thank you Jonh and Vincent for the answers!
Well, I did a little more research, and tested a very simple code
(anexed). Ran ldd on it, and got
+
[EMAIL PROTECTED]:~$ ldd a.out
libc.so.6 => /lib/libc.so.6 (
and sun studio 11. The architecture has 64 bits integer registers and 128
bits floating point registers,
no: it has SIMD registers which can be used as 2x64 or 4x32 FP
(or 16x8, 8x16, 4x32, 2x64 int).
but my test programs in C just gave me the
same precision that I got with an old athlon 2400
The Programme (subject to change) for our 17th Machine Evaluation Workshop has
now gone live
http://www.cse.clrc.ac.uk/disco/mew17/
There is no registration fee and it's open to all (assuming we have enough
room).
The forthcoming 2006 Machine Evaluation Workshop will be held on 5th and 6th
De
Hello everybody at beowulf. Sorry about the _really_ newbie question, but
after doing some tests and researching a little, a question arose when
fooling around with amd64 (more precisely, an amd64 Athlon 4200 X2) and gcc
and sun studio 11. The architecture has 64 bits integer registers and 128
bit
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