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Spider wrote: |
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> soo, right now I'm running march=athlon-tbird -O3 -pipe for most things |
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In case anybody is curious like I was: |
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I didn't know the difference between the various athlon arch settings, |
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athlon-tbird, athlon-xp, etc. I found that there are two athlon |
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variations, those with the sse instruction set and those w/o sse. |
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no sse: athlon, athlon-tbird |
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sse: athlon-4, athlon-xp, athlon-mp |
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`grep sse /proc/cpuinfo` to see if your cpu has sse, though I don't know |
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how reliable cpuinfo is. I have a duron 1GHz, and it has sse, but earlier |
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durons, <1GHz, don't have sse. |
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also, when you do either of -msse -m3dnow gcc automagically does -mmmmx |
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for you. |
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from what I see, athlon and athlon-tbird are identical arch settings, as |
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are athlon-4, athlon-xp, and athlon-mp. |
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so can anyone verify this? of course its possible the different names are |
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there for finer grained code gen in the future. |
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Dave |
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