diff options
| author | iximeow <me@iximeow.net> | 2021-01-15 18:15:04 -0800 |
|---|---|---|
| committer | iximeow <me@iximeow.net> | 2021-01-15 18:21:19 -0800 |
| commit | d8083b08dc987adeda73fb13298383c6cf519596 (patch) | |
| tree | e6e4f19b631d26c547551d9168fda81476de2c1e /CHANGELOG | |
| parent | dd88df2b9769630f8eafe909e00eb3a3a21c954e (diff) | |
small perf tweaks
clearing reg_rrr and reg_mmm more efficiently is an extremely small win,
but a win
read_imm_signed generally should inline well and runs afoul of some
heuristic. inlining gets about 8% improved throughput on the
(unrealistic) in-repo benchmark
it would be great to be able to avoid bounds checks somehow; it looks
like they alone are another ~10% of decode time. i'm not sure how to
pull that off while retaining the generic iterator parameter. might just
not be possible.
Diffstat (limited to 'CHANGELOG')
| -rw-r--r-- | CHANGELOG | 2 |
1 files changed, 2 insertions, 0 deletions
@@ -3,6 +3,8 @@ - AMD-only `monitorx`, `mwaitx`, `clzero`, and `rdpru` are now supported - `swapgs` is invalid in non-64-bit modes - `rdpkru` and `wrpkru` were incorrectly decoded when modrm bits were not `11` +* small performance tweaks. read_imm_signed is now inline(always) and some + pre-decode initialization is a bit better-packed ## 0.1.4 * [long mode only]: fix decoding of rex-prefixed modrm+sib operands selecting index 0b100 and base 0b101 |