These are called through function pointers so that different implementations
can be provided for cheetah, where the block load instructions may or may
not be a win, and so they can be disabled with the machdep.use_vis tunable.
In terms of raw bandwidth the integer versions are faster, but not allocating
lines in the L2 cache for useless data gives a measurable improvement in user
time for the benchmarks I tested (mostly buildworld with -j8).
As far as I can tell the instructions used are implemented on everything
back to UltraSPARC I, so there should not be a problem with different cpu
types.
This avoids an immediate access bit fault when we serviced the dirty
bit fault in case the access bit is unset. This typically happens for
newly allocated memory that's being zeroed and thus very common.
is because we populate these directories later, and a subsequent
-DNOCLEAN build may fail. So, we put them in
${WORLDTMP}/build/usr/{include,lib} instead and adjust Makefile.boot.
Again, this works on -stable and -current, but might break older
versions.
Submitted by: ru@
which deals with both endianness and alignment issues.
- Collect low-hanging fruits for endianness safety.
- Use 0xffffffff instead of -1 where appropriate.
endian safe.
- Change some u_int to u_int8_t which make more sense here since
we're really defining bytes. That produces the same code due to
how bitfields work.
- Add the definition of the vlan_drop_en bit (not used yet).
- Add some useful comments.
Obtained from: NetBSD
RX part of this driver too. It's better since the code wasn't
dealing with bus_dmamap_load() returning EINPROGRESS, and this
can't happen with bus_dmamap_load_mbuf().
Submitted by: jake
- We used to round long double arguments to double. Now we print
them properly.
- Bugs involving '%F', corner cases of '#' and 'g' format
specifiers, and the '.*' precision specifier have been
fixed.
- Added support for the "'" specifier to print thousands' grouping
characters in a locale-dependent manner.
- Implement the __vfprintf() side of hexadecimal floating point
support. All that is still needed is a routine to convert the
mantissa to hex digits one nibble at a time in the style of ultoa().
Reviewed by: silence on standards@
- __vfprintf()'s 'buf' has never been used for floating point, so
don't define it in terms of (incorrect) constants describing
floating point numbers. The actual size needed depends on
sizeof(uintmax_t) and locale details, so I slightly overestimated.
- We don't need a 308-character buffer to store the string "308".
With long doubles and %a we need more than three characters, though.
FreeBSD. This method attempts to centralize all the necessary hacks
or work arounds in one of two places in the tree (src/Makefile.inc1
and src/tools/build). We build a small compatibility library
(libbuild.a) as well as selectively installing necessary include
files. We then include this directory when building host binaries.
This removes all the past release compatibilty hacks from various
places in the tree. We still build on tip of stable and current. I
will work with those that want to support more, although I anticipate
it will just work.
Many thanks to ru@, obrien@ and jhb@ for providing valuable input at
various stage of implementation, as well as for working together to
positively effect a change for the better.
1) Make fetch_mode a pointer 'cos we can just use the optarg.
2) Constness.
3) Add/complete prototypes.
4) Change an int to a socklen_t.
5) Don't use C++ style comments.
6) Check return values from read and fork a little more carefully.
7) Avoid closing an uninitialised int.
8) Get rid of unneeded extern declarations.
