* egcs-1.0.2 wrongly detect a Pentium II as a i386 on SCO5 - patch included
@ 1998-04-27 14:44 Joao Cardoso
1998-04-28 15:33 ` Richard Henderson
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: Joao Cardoso @ 1998-04-27 14:44 UTC (permalink / raw)
To: egcs
Hi,
On sco-3.2v5.0.4 `configure' wrongly detect a Pentium II as a i386.
uname output:
# uname -X
System = SCO_SV
Node = merlin
Release = 3.2v5.0.4
KernelID = 97/09/03
Machine = Pent II
BusType = ISA
Serial = 4EL025833
Users = 5-user
OEM# = 0
Origin# = 1
NumCPU = 1
I don't know if this has any implications on code generation. A simple
`gcc -S foo.c' report `-mcpu=i386 -march=pentium'
Also, I don't know if UNAME_MACHINE should be set to i586 ou i686? In
the simple diff to the top config.guess that I include, I set it to
i586. Please change if appropriate.
*** config.guess- Mon Apr 27 17:28:31 1998
--- config.guess Mon Apr 27 17:29:12 1998
***************
*** 674,680 ****
elif /bin/uname -X 2>/dev/null >/dev/null ; then
UNAME_REL=`(/bin/uname -X|egrep Release|sed -e 's/.*=
//')`
(/bin/uname -X|egrep i80486 >/dev/null) &&
UNAME_MACHINE=i486
! (/bin/uname -X|egrep '^Machine.*Pentium' >/dev/null) \
&& UNAME_MACHINE=i586
echo ${UNAME_MACHINE}-pc-sco$UNAME_REL
else
--- 674,680 ----
elif /bin/uname -X 2>/dev/null >/dev/null ; then
UNAME_REL=`(/bin/uname -X|egrep Release|sed -e 's/.*=
//')`
(/bin/uname -X|egrep i80486 >/dev/null) &&
UNAME_MACHINE=i486
! (/bin/uname -X|egrep '^Machine.*Pent' >/dev/null) \
&& UNAME_MACHINE=i586
echo ${UNAME_MACHINE}-pc-sco$UNAME_REL
else
Thanks,
Joao
--
Joao Cardoso | e-mail: jcardoso@inescn.pt
INESC, R. Jose Falcao 110 | tel: + 351 2 2094345
4000 PORTO, PORTUGAL | fax: + 351 2 2008487
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: egcs-1.0.2 wrongly detect a Pentium II as a i386 on SCO5 - patch included
1998-04-27 14:44 egcs-1.0.2 wrongly detect a Pentium II as a i386 on SCO5 - patch included Joao Cardoso
@ 1998-04-28 15:33 ` Richard Henderson
1998-04-28 19:49 ` Todd Vierling
1998-05-03 22:02 ` Jim Wilson
2 siblings, 0 replies; 6+ messages in thread
From: Richard Henderson @ 1998-04-28 15:33 UTC (permalink / raw)
To: Joao Cardoso; +Cc: egcs
On Mon, Apr 27, 1998 at 05:46:12PM +0100, Joao Cardoso wrote:
> On sco-3.2v5.0.4 `configure' wrongly detect a Pentium II as a i386.
You'd actually like to detect a p2 as an i686, since it uses the ppro core.
r~
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: egcs-1.0.2 wrongly detect a Pentium II as a i386 on SCO5 - patch included
1998-04-27 14:44 egcs-1.0.2 wrongly detect a Pentium II as a i386 on SCO5 - patch included Joao Cardoso
1998-04-28 15:33 ` Richard Henderson
@ 1998-04-28 19:49 ` Todd Vierling
1998-05-03 22:02 ` Jim Wilson
2 siblings, 0 replies; 6+ messages in thread
From: Todd Vierling @ 1998-04-28 19:49 UTC (permalink / raw)
To: Joao Cardoso; +Cc: egcs
On Mon, 27 Apr 1998, Joao Cardoso wrote:
: On sco-3.2v5.0.4 `configure' wrongly detect a Pentium II as a i386.
This is actually half correct.
: I don't know if this has any implications on code generation. A simple
: `gcc -S foo.c' report `-mcpu=i386 -march=pentium'
The -march= is what really matters. All i[3456]86 based chips are, at their
base, considered `i386' processors, but the architecture can be set for code
generation as gcc does above. The actual architecture name is i386, not
i586 or i686.
When it comes down to it, a machine name such as `i586-pc-linux' is
incorrect. `configure' just happily accepts it and treats it as
`i386-pc-linux'. Same goes for SCO.
--
-- Todd Vierling (Personal tv@pobox.com; Bus. todd_vierling@xn.xerox.com)
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: egcs-1.0.2 wrongly detect a Pentium II as a i386 on SCO5 - patch included
1998-04-27 14:44 egcs-1.0.2 wrongly detect a Pentium II as a i386 on SCO5 - patch included Joao Cardoso
1998-04-28 15:33 ` Richard Henderson
1998-04-28 19:49 ` Todd Vierling
@ 1998-05-03 22:02 ` Jim Wilson
1998-04-30 20:03 ` Joao Cardoso
2 siblings, 1 reply; 6+ messages in thread
From: Jim Wilson @ 1998-05-03 22:02 UTC (permalink / raw)
To: Joao Cardoso; +Cc: egcs
If we are going to fix this, we should get the processor right.
Does this work?
config.guess is a shared file, so it might take me a little while to figure
out the right way to modify it. It isn't safe to just change EGCS's version
of it.
Tue Apr 28 19:54:26 1998 Jim Wilson <wilson@cygnus.com>
* config.guess (i?86:*:3.2:*): Check for 'Pent II' and set
UNAME_MACHINE to i686.
Index: config.guess
===================================================================
RCS file: /egcs/carton/cvsfiles/egcs/config.guess,v
retrieving revision 1.10
diff -p -r1.10 config.guess
*** config.guess 1998/04/03 16:21:56 1.10
--- config.guess 1998/04/29 02:54:18
*************** EOF
*** 695,700 ****
--- 695,702 ----
(/bin/uname -X|egrep i80486 >/dev/null) && UNAME_MACHINE=i486
(/bin/uname -X|egrep '^Machine.*Pentium' >/dev/null) \
&& UNAME_MACHINE=i586
+ (/bin/uname -X|egrep '^Machine.*Pent II' >/dev/null) \
+ && UNAME_MACHINE=i686
echo ${UNAME_MACHINE}-pc-sco$UNAME_REL
else
echo ${UNAME_MACHINE}-pc-sysv32
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: egcs-1.0.2 wrongly detect a Pentium II as a i386 on SCO5 - patch included
1998-05-03 22:02 ` Jim Wilson
@ 1998-04-30 20:03 ` Joao Cardoso
0 siblings, 0 replies; 6+ messages in thread
From: Joao Cardoso @ 1998-04-30 20:03 UTC (permalink / raw)
To: Jim Wilson; +Cc: egcs
Jim Wilson wrote:
>
> If we are going to fix this, we should get the processor right.
> Does this work?
>
Yes. Thanks.
o At home, with Free SCO and a Pentium:
Configuring for a i586-pc-sco3.2v5.0.4 host.
Created "Makefile" in /src/compilers/egcs-1.0.2-objdir using
"/src/compilers/egcs-1.0/config/mh-sysv"
...
o At the office, with a Pentium II:
Configuring for a i686-pc-sco3.2v5.0.4 host.
Created "Makefile" in /src/egcs-1.0.2-build using
"/src/egcs-1.0.2/config/mh-sys
...
> config.guess is a shared file, so it might take me a little while to figure
> out the right way to modify it. It isn't safe to just change EGCS's version
> of it.
>
> Tue Apr 28 19:54:26 1998 Jim Wilson <wilson@cygnus.com>
>
> * config.guess (i?86:*:3.2:*): Check for 'Pent II' and set
> UNAME_MACHINE to i686.
>
> Index: config.guess
> ===================================================================
> RCS file: /egcs/carton/cvsfiles/egcs/config.guess,v
> retrieving revision 1.10
> diff -p -r1.10 config.guess
> *** config.guess 1998/04/03 16:21:56 1.10
> --- config.guess 1998/04/29 02:54:18
> *************** EOF
> *** 695,700 ****
> --- 695,702 ----
> (/bin/uname -X|egrep i80486 >/dev/null) && UNAME_MACHINE=i486
> (/bin/uname -X|egrep '^Machine.*Pentium' >/dev/null) \
> && UNAME_MACHINE=i586
> + (/bin/uname -X|egrep '^Machine.*Pent II' >/dev/null) \
> + && UNAME_MACHINE=i686
> echo ${UNAME_MACHINE}-pc-sco$UNAME_REL
> else
> echo ${UNAME_MACHINE}-pc-sysv32
--
Joao Cardoso, INESC | e-mail:
R. Jose Falcao 110 | tel: + 351 2 2094345
4050 Porto, Portugal | fax: + 351 2 2008487
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: egcs-1.0.2 wrongly detect a Pentium II as a i386 on SCO5 - patch included
@ 1998-04-29 7:57 Michael Meissner
0 siblings, 0 replies; 6+ messages in thread
From: Michael Meissner @ 1998-04-29 7:57 UTC (permalink / raw)
To: jcardoso, tv; +Cc: egcs
| On Mon, 27 Apr 1998, Joao Cardoso wrote:
|
| : On sco-3.2v5.0.4 `configure' wrongly detect a Pentium II as a i386.
|
| This is actually half correct.
Well if you look at config.guess, you will see that it gets the information
from /usr/options/cb.name if it exists, and /bin/uname -X if it does not.
Somebody who has a SCO system with a Pentium-II will have to supply us with the
appropriate lines to use, since there is no telling what an OS might choose to
report.
| : I don't know if this has any implications on code generation. A simple
| : `gcc -S foo.c' report `-mcpu=i386 -march=pentium'
|
| The -march= is what really matters. All i[3456]86 based chips are, at their
| base, considered `i386' processors, but the architecture can be set for code
| generation as gcc does above. The actual architecture name is i386, not
| i586 or i686.
|
| When it comes down to it, a machine name such as `i586-pc-linux' is
| incorrect. `configure' just happily accepts it and treats it as
| `i386-pc-linux'. Same goes for SCO.
Wrong. If you configure for i386-pc-linux, it will default the scheduling
parameters to be an i386. If you configure for i585-pc-linux, it will default
the scheduling parameters to be a Pentium classic. Similarly for
i686-pc-linux, it will default for a Pentium-{Pro,II}. For example, when
compiling for a i386, the compiler believes the fastest way to push a value in
memory is to execute a single push instruction, while for all machines higher
than a i386, it loads the value into a register and then does a push.
--
Michael Meissner, Cygnus Solutions (Massachusetts office)
4th floor, 955 Massachusetts Avenue, Cambridge, MA 02139, USA
meissner@cygnus.com, 617-354-5416 (office), 617-354-7161 (fax)
^ permalink raw reply [flat|nested] 6+ messages in thread
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1998-04-27 14:44 egcs-1.0.2 wrongly detect a Pentium II as a i386 on SCO5 - patch included Joao Cardoso
1998-04-28 15:33 ` Richard Henderson
1998-04-28 19:49 ` Todd Vierling
1998-05-03 22:02 ` Jim Wilson
1998-04-30 20:03 ` Joao Cardoso
1998-04-29 7:57 Michael Meissner
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