January 2010 - openSUSE Programming - openSUSE Mailing Lists

[opensuse-programming] glibcxx
by Volker 23 Jan '10

23 Jan '10

How are glibcxx and libstdc++ related? Is glibcxx the same as libstc++, if yes: Why are there two names? -- To unsubscribe, e-mail: opensuse-programming+unsubscribe(a)opensuse.org For additional commands, e-mail: opensuse-programming+help(a)opensuse.org

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[opensuse-programming] Why you sometimes need assembler
by Per Jessen 15 Jan '10

15 Jan '10

Just a follow-up on my earlier question about which assembler to choose. I've opted for nasm. I still don't quite like the simplicity-idea, but I think I can work around the most annoying "features" with a set of my own macros. However, I've just completed some initial testing, and here is why you need assembler: I'm processing a dataset of 262176 bytes. Not a lot, but still about 2million bits. The computation is 99.9% CPU-bound. In my first version, I used a div instruction in the code, and the computation took 151minutes (wall-time). In the second, I removed the div, and probably removed one or two other instructions. New computation took 62minutes. /Per Jessen, Zürich -- To unsubscribe, e-mail: opensuse-programming+unsubscribe(a)opensuse.org For additional commands, e-mail: opensuse-programming+help(a)opensuse.org

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[opensuse-programming] Which assembler ?
by Per Jessen 02 Jan '10

02 Jan '10

Which assembler do I pick for i386 and x86_64 ? I see a few different ones out there - nasm, gas, yasm, lzasm, fasm, probably many others too. I am a long-time TASM user, and very familiar with it, and I have a lot of code around written for TASM. yasm is supposed to be able to mimick tasm, but last I tried it didn't work very well or support was very limited. If it wasn't for TASMs obvious lack of support for anything that happened after 1998, I would still be using that, but I really need a modern assembler. If I have to learn new format, so be it. Any recommendations? I've been taking some baby steps with nasm, but I'm not overly impressed with it sofar. /Per Jessen, Zürich -- To unsubscribe, e-mail: opensuse-programming+unsubscribe(a)opensuse.org For additional commands, e-mail: opensuse-programming+help(a)opensuse.org

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