Commit Graph

8 Commits

Author SHA1 Message Date
David Goldblatt
22da836094 bit_util: Add fls_ functions; "find last set".
These simplify a lot of the bit_util module, which had grown bits and pieces of
this functionality across a variety of places over the years.

While we're here, kill off BIT_UTIL_INLINE and don't do reentrancy testing for
bit_util.
2020-07-30 15:25:23 -07:00
David Goldblatt
1ed0288d9c bit_util: Change ffs functions indexing.
Making these 0-based instead of 1-based makes calling code simpler and will be
more consistent with functions introduced in subsequent diffs.
2020-07-30 15:25:23 -07:00
Dave Watson
13c237c7ef Add a fastpath for arena_slab_reg_alloc_batch
Also adds a configure.ac check for __builtin_popcount, which is used
in the new fastpath.
2018-11-14 07:09:11 -08:00
Rajeev Misra
115ce93562 bit_util: Don't use __builtin_clz on s390x
There's an optimizer bug upstream that results in test failures; reported at
https://bugzilla.redhat.com/show_bug.cgi?id=1619354.  This works around the
failure reported at https://github.com/jemalloc/jemalloc/issues/1307.
2018-09-20 11:25:17 -07:00
Rajeev Misra
4c548a61c8 Bit_util: Use intrinsics for pow2_ceil, where available. 2018-08-15 19:38:31 -07:00
David Goldblatt
2f07e92adb Add lg_ceil to bit_util.
Also, add the bit_util test back to the Makefile.
2018-07-12 20:53:06 -07:00
David Goldblatt
e904f813b4 Hide size class computation behind a layer of indirection.
This class removes almost all the dependencies on size_classes.h, accessing the
data there only via the new module sc.h, which does not depend on any
configuration options.

In a subsequent commit, we'll remove the configure-time size class computations,
doing them at boot time, instead.
2018-07-12 20:53:06 -07:00
David Goldblatt
e9852b5776 Disentangle assert and util
This is the first header refactoring diff, #533.  It splits the assert and util
components into separate, hermetic, header files.  In the process, it splits out
two of the large sub-components of util (the stdio.h replacement, and bit
manipulation routines) into their own components (malloc_io.h and bit_util.h).
This is mostly to break up cyclic dependencies, but it also breaks off a good
chunk of the catch-all-ness of util, which is nice.
2017-03-06 15:08:43 -08:00