1. 11 May, 2017 1 commit
  2. 29 Apr, 2017 4 commits
  3. 28 Apr, 2017 5 commits
  4. 25 Apr, 2017 4 commits
  5. 20 Apr, 2017 2 commits
  6. 19 Apr, 2017 1 commit
  7. 16 Apr, 2017 5 commits
  8. 15 Apr, 2017 8 commits
  9. 14 Apr, 2017 4 commits
    • Jeremy Soller's avatar
      Merge pull request #11 from pi-pi3/faster-externs · 0a72d1cb
      Jeremy Soller authored
      A faster implementation of the memcpy family
      0a72d1cb
    • pi_pi3's avatar
      Avoid multiplication in memcpy family functions · 5c1e6190
      pi_pi3 authored
      Instead of multiplying everything by 8[/4], now addition is used. That
      way code is prettier.
      5c1e6190
    • pi_pi3's avatar
      A faster implementation of the memcpy family · c4fc76f8
      pi_pi3 authored
      The default implementation of the memcpy, memmove, memset and memcmp
      functions in the kernel file `extern.rs` uses a naive implementation
      by copying, assigning or comparing bytes ony by one. This can be slow.
      This commit proposes a reimplementation of those functions by copying,
      assigning or comparing in group of 8 bytes by using the u64 type and
      its respective pointers instead of u8. Alternative version for 32-bit
      architectures are also supplied for future compatibility with x86.
      Both version first copy whatever they can with wide word types. The
      tail, i.e. the final few bytes that do not fit in a dword or qword
      are then copied byte by byte.
      
      Here is a comparison of copying 64kiB (65536 bytes) on stack:
      
      x86_64-unknown-linux-gnu: (64-bit)
             | naive (ns) | fast (ns) | speedup (x)
      -------|------------|-----------|------------
      memcpy |   204430   |   32994   |   ~6.20
      memmove|   202540   |   33186   |   ~6.10
      memset |   163391   |   23884   |   ~6.84
      memcmp |   205663   |   34385   |   ~5.98
      
      i686-unknown-linux-gnu: (32-bit)
             | naive (ns) | fast (ns) | speedup (x)
      -------|------------|-----------|------------
      memcpy |   206297   |   66858   |   ~3.09
      memmove|   204576   |   70326   |   ~2.91
      memset |   165599   |   50227   |   ~3.30
      memcmp |   204262   |   70572   |   ~2.89
      
      Copying on the heap behaves simmilarly.
      
      All tests performed on Intel i5 6600K (4x4.2GHz),
      ArchLinux Kernel 4.8.12-3 x86_64.
      c4fc76f8
    • Jeremy Soller's avatar
      Add linker flavor · 56a533fb
      Jeremy Soller authored
      56a533fb
  10. 12 Apr, 2017 2 commits
  11. 11 Apr, 2017 2 commits
    • Jeremy Soller's avatar
      Merge pull request #10 from xTibor/fix_initfs · d9e95448
      Jeremy Soller authored
      Fix the listing of `initfs:` directories
      d9e95448
    • Nagy Tibor's avatar
      Fix the listing of `initfs:` directories · 1f5bea61
      Nagy Tibor authored
      There was a bug at the `initfs` generation which made the listing of the contents of the `initfs:`subdirectories impossible from the command line.
      
      The subdirectory listing data had the full paths of the files (like `bin/ahcid\nbin/bgad\n...`) when it should just only be the names of the files (`ahcid\nbgad\n...`)
      1f5bea61
  12. 09 Apr, 2017 1 commit
  13. 08 Apr, 2017 1 commit