search for: bdvern

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2020 Jul 13
3
New x86-64 micro-architecture levels
...t; > I'll be glad if I can get any feedback on this proposal. I plan to turn > > it into a merge request for the x86-64 psABI document eventually. > > > > Looks good. I like it. Likewise. Btw, did you check that VIA family chips slot into Level A at least? Where do AMD bdverN slot in? > My only concerns are > > 1. Names like “x86-100”, “x86-101”, what features do they support? Indeed I didn't get the -100, -101 part. On the GCC side I'd have suggested -march=generic-{A,B,C,D} implying the respective -mtune. Do the patches end up annotating ELF bina...
2020 Jul 10
12
New x86-64 micro-architecture levels
Most Linux distributions still compile against the original x86-64 baseline that was based on the AMD K8 (minus the 3DNow! parts, for Intel EM64T compatibility). There has been an attempt to use the existing AT_PLATFORM-based loading mechanism in the glibc dynamic linker to enable a selection of optimized libraries. But the general selection mechanism in glibc is problematic: hwcaps