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On Thu, Feb 26, 2004 at 12:58:27AM +0000, francis wrote: |
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> Hello, |
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> I am somewhat new to gentoo, i've used catalyst to create some |
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> stage1/2/3 tar balls, however i have a c3 processor, I have had a look |
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> at {sharedir}/arch/x86.py, and thought it should be easy to create the |
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> addition of a C3 type |
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> |
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> i assume something like |
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> |
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> ... |
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> class arch_c3(generic_x86): |
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> def __init__(self,myspec): |
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> generic_x86.__init__(self,myspec) |
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> self.settings["CFLAGS"]="-march=i686 -mfpmath=sse -Os -pipe |
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> -fomit-frame-pointer" |
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> self.settings["CHOST"]="i686-pc-linux-gnu" |
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> self.settings["HOSTUSE"]=["mmx","sse"] |
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> and |
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Whoa! unless you want to break older C3 chips, don't use i686 in arch. |
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i686 implies the usage of the CMOV instruction, which the older C3s do |
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NOT have (this is why older i686+ stages used to cause problems on the |
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C3's). I also don't think the older C3's had sse, just MMX (my C3 is |
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powered down at the moment). |
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|
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If you have gcc 3.3 or newer, -march=c3 is the way to go to avoid the |
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problem. |
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|
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I'd strongly suggest having sub-classes of the C3, eg C3, C3-2. While |
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GCC3.3 doesn't have them, GCC3.4 does. |
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|
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-- |
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Robin Hugh Johnson |
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E-Mail : robbat2@××××××××××××××.net |
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Home Page : http://www.orbis-terrarum.net/?l=people.robbat2 |
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ICQ# : 30269588 or 41961639 |
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GnuPG FP : 11AC BA4F 4778 E3F6 E4ED F38E B27B 944E 3488 4E85 |
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